Anet A8 new firmware, printer will not begin printing at center

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So, I added my mofsets, and finally upgraded my firnware, and now I for the life of me cannot get the printer to start it's print in the center of the bed. It was at first printing towards the back and the the left (facing printer), and I managed to do "something" but now it's printing directly to the right side of the pring bed now.
I'll paste the Config.h in a sec, and the cura g-code setting below that, please if anyone can lend a hand please do, I really have no idea what i am doing realy....


  • Marlin 3D Printer Firmware
  • Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  • Based on Sprinter and grbl.
  • Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
  • This program is free software: you can redistribute it and/or modify
  • it under the terms of the GNU General Public License as published by
  • the Free Software Foundation, either version 3 of the License, or
  • (at your option) any later version.
  • This program is distributed in the hope that it will be useful,
  • but WITHOUT ANY WARRANTY; without even the implied warranty of
  • GNU General Public License for more details.
  • You should have received a copy of the GNU General Public License
  • along with this program. If not, see http://www.gnu.org/licenses/.
  • */


  • Configuration.h
  • Basic settings such as:
    • Type of electronics
    • Type of temperature sensor
    • Printer geometry
    • Endstop configuration
    • LCD controller
    • Extra features
  • Advanced settings can be found in Configuration_adv.h
  • */




//============================= Getting Started =============================


//============================= DELTA Printer ===============================
// For a Delta printer replace the configuration files with the files in the
// example_configurations/delta directory.

//============================= SCARA Printer ===============================
// For a Scara printer replace the configuration files with the files in the
// example_configurations/SCARA directory.

// @section info

// User-specified version info of this build to display in [Pronterface, etc] terminal window during
// startup. Implementation of an idea by Prof Braino to inform user that any changes made to this
// build by the user have been successfully uploaded into firmware.

define STRING_CONFIG_H_AUTHOR "(none, default config)" // Who made the changes.


define STRING_SPLASH_LINE1 "My SkyNet3D V2.4.5" // will be shown during bootup in line 1

define STRING_SPLASH_LINE2 "Marlin " SHORT_BUILD_VERSION // will be shown during bootup in line 2

// Marlin now allow you to have a vendor boot image to be displayed on machine
// start. When SHOW_CUSTOM_BOOTSCREEN is defined Marlin will first show your
// custom boot image and then the default Marlin boot image is shown.
// We suggest for you to take advantage of this new feature and keep the Marlin
// boot image unmodified. For an example have a look at the bq Hephestos 2
// example configuration folder.
// @section machine


  • Select which serial port on the board will be used for communication with the host.
  • This allows the connection of wireless adapters (for instance) to non-default port pins.
  • Serial port 0 is always used by the Arduino bootloader regardless of this setting.
  • :[0, 1, 2, 3, 4, 5, 6, 7]

    define SERIAL_PORT 0


  • This setting determines the communication speed of the printer.
  • 250000 works in most cases, but you might try a lower speed if
  • you commonly experience drop-outs during host printing.
  • :[2400, 9600, 19200, 38400, 57600, 115200, 250000]

    define BAUDRATE 250000

// Enable the Bluetooth serial interface on AT90USB devices
//#define BLUETOOTH

// The following define selects which electronics board you have.
// Please choose the name from boards.h that matches your setup




// Optional custom name for your RepStrap or other custom machine
// Displayed in the LCD "Ready" message
//#define CUSTOM_MACHINE_NAME "3D Printer"

// Define this to set a unique identifier for this printer, (Used by some programs to differentiate between machines)
// You can use an online service to generate a random UUID. (eg http://www.uuidgenerator.net/version4)
//#define MACHINE_UUID "00000000-0000-0000-0000-000000000000"

// @section extruder

// This defines the number of extruders
// :[1, 2, 3, 4, 5]

define EXTRUDERS 1

// For Cyclops or any "multi-extruder" that shares a single nozzle.

// A dual extruder that uses a single stepper motor



define SWITCHING_EXTRUDER_SERVO_ANGLES { 0, 90 } // Angles for E0, E1


// A dual-nozzle that uses a servomotor to raise/lower one of the nozzles



define SWITCHING_NOZZLE_SERVO_ANGLES { 0, 90 } // Angles for E0, E1

//#define HOTEND_OFFSET_Z { 0.0, 0.0 }



  • "Mixing Extruder"
    • Adds a new code, M165, to set the current mix factors.
    • Extends the stepping routines to move multiple steppers in proportion to the mix.
    • Optional support for Repetier Firmware M163, M164, and virtual extruder.
    • This implementation supports only a single extruder.
    • Enable DIRECT_MIXING_IN_G1 for Pia Taubert's reference implementation
      //#define MIXING_EXTRUDER


      define MIXING_STEPPERS 2 // Number of steppers in your mixing extruder

      define MIXING_VIRTUAL_TOOLS 16 // Use the Virtual Tool method with M163 and M164

      //#define DIRECT_MIXING_IN_G1 // Allow ABCDHI mix factors in G1 movement commands


// Offset of the extruders (uncomment if using more than one and relying on firmware to position when changing).
// The offset has to be X=0, Y=0 for the extruder 0 hotend (default extruder).
// For the other hotends it is their distance from the extruder 0 hotend.
//#define HOTEND_OFFSET_X {0.0, 20.00} // (in mm) for each extruder, offset of the hotend on the X axis
//#define HOTEND_OFFSET_Y {0.0, 5.00} // (in mm) for each extruder, offset of the hotend on the Y axis

// @section machine


  • Select your power supply here. Use 0 if you haven't connected the PS_ON_PIN
  • 0 = No Power Switch
  • 1 = ATX
  • 2 = X-Box 360 203Watts (the blue wire connected to PS_ON and the red wire to VCC)
  • :{ 0:'No power switch', 1:'ATX', 2:'X-Box 360' }

    define POWER_SUPPLY 0


// Enable this option to leave the PSU off at startup.
// Power to steppers and heaters will need to be turned on with M80.
//#define PS_DEFAULT_OFF


// @section temperature

//============================= Thermal Settings ============================


  • --NORMAL IS 4.7kohm PULLUP!-- 1kohm pullup can be used on hotend sensor, using correct resistor and table
  • Temperature sensors available:
  • -3 : thermocouple with MAX31855 (only for sensor 0)
  • -2 : thermocouple with MAX6675 (only for sensor 0)
  • -1 : thermocouple with AD595
  • 0 : not used
  • 1 : 100k thermistor - best choice for EPCOS 100k (4.7k pullup)
  • 2 : 200k thermistor - ATC Semitec 204GT-2 (4.7k pullup)
  • 3 : Mendel-parts thermistor (4.7k pullup)
  • 4 : 10k thermistor !! do not use it for a hotend. It gives bad resolution at high temp. !!
  • 5 : 100K thermistor - ATC Semitec 104GT-2 (Used in ParCan & J-Head) (4.7k pullup)
  • 6 : 100k EPCOS - Not as accurate as table 1 (created using a fluke thermocouple) (4.7k pullup)
  • 7 : 100k Honeywell thermistor 135-104LAG-J01 (4.7k pullup)
  • 71 : 100k Honeywell thermistor 135-104LAF-J01 (4.7k pullup)
  • 8 : 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup)
  • 9 : 100k GE Sensing AL03006-58.2K-97-G1 (4.7k pullup)
  • 10 : 100k RS thermistor 198-961 (4.7k pullup)
  • 11 : 100k beta 3950 1% thermistor (4.7k pullup)
  • 12 : 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup) (calibrated for Makibox hot bed)
  • 13 : 100k Hisens 3950 1% up to 300°C for hotend "Simple ONE " & "Hotend "All In ONE"
  • 20 : the PT100 circuit found in the Ultimainboard V2.x
  • 60 : 100k Maker's Tool Works Kapton Bed Thermistor beta=3950
  • 66 : 4.7M High Temperature thermistor from Dyze Design
  • 70 : the 100K thermistor found in the bq Hephestos 2
  • 75 : 100k Generic Silicon Heat Pad with NTC 100K MGB18-104F39050L32 thermistor
  • 1k ohm pullup tables - This is atypical, and requires changing out the 4.7k pullup for 1k.
  • (but gives greater accuracy and more stable PID)
  • 51 : 100k thermistor - EPCOS (1k pullup)
  • 52 : 200k thermistor - ATC Semitec 204GT-2 (1k pullup)
  • 55 : 100k thermistor - ATC Semitec 104GT-2 (Used in ParCan & J-Head) (1k pullup)
  • 1047 : Pt1000 with 4k7 pullup
  • 1010 : Pt1000 with 1k pullup (non standard)
  • 147 : Pt100 with 4k7 pullup
  • 110 : Pt100 with 1k pullup (non standard)
  • Use these for Testing or Development purposes. NEVER for production machine.
  • 998 : Dummy Table that ALWAYS reads 25°C or the temperature defined below.
  • 999 : Dummy Table that ALWAYS reads 100°C or the temperature defined below.
  • :{ '0': "Not used", '1':"100k / 4.7k - EPCOS", '2':"200k / 4.7k - ATC Semitec 204GT-2", '3':"Mendel-parts / 4.7k", '4':"10k !! do not use for a hotend. Bad resolution at high temp. !!", '5':"100K / 4.7k - ATC Semitec 104GT-2 (Used in ParCan & J-Head)", '6':"100k / 4.7k EPCOS - Not as accurate as Table 1", '7':"100k / 4.7k Honeywell 135-104LAG-J01", '8':"100k / 4.7k 0603 SMD Vishay NTCS0603E3104FXT", '9':"100k / 4.7k GE Sensing AL03006-58.2K-97-G1", '10':"100k / 4.7k RS 198-961", '11':"100k / 4.7k beta 3950 1%", '12':"100k / 4.7k 0603 SMD Vishay NTCS0603E3104FXT (calibrated for Makibox hot bed)", '13':"100k Hisens 3950 1% up to 300°C for hotend 'Simple ONE ' & hotend 'All In ONE'", '20':"PT100 (Ultimainboard V2.x)", '51':"100k / 1k - EPCOS", '52':"200k / 1k - ATC Semitec 204GT-2", '55':"100k / 1k - ATC Semitec 104GT-2 (Used in ParCan & J-Head)", '60':"100k Maker's Tool Works Kapton Bed Thermistor beta=3950", '66':"Dyze Design 4.7M High Temperature thermistor", '70':"the 100K thermistor found in the bq Hephestos 2", '71':"100k / 4.7k Honeywell 135-104LAF-J01", '147':"Pt100 / 4.7k", '1047':"Pt1000 / 4.7k", '110':"Pt100 / 1k (non-standard)", '1010':"Pt1000 / 1k (non standard)", '-3':"Thermocouple + MAX31855 (only for sensor 0)", '-2':"Thermocouple + MAX6675 (only for sensor 0)", '-1':"Thermocouple + AD595",'998':"Dummy 1", '999':"Dummy 2" }

    define TEMP_SENSOR_0 5

    define TEMP_SENSOR_1 0

    define TEMP_SENSOR_2 0

    define TEMP_SENSOR_3 0

    define TEMP_SENSOR_4 0

    define TEMP_SENSOR_BED 5

// Dummy thermistor constant temperature readings, for use with 998 and 999



// Use temp sensor 1 as a redundant sensor with sensor 0. If the readings
// from the two sensors differ too much the print will be aborted.


// Extruder temperature must be close to target for this long before M109 returns success

define TEMP_RESIDENCY_TIME 6 // (seconds)

define TEMP_HYSTERESIS 3 // (degC) range of +/- temperatures considered "close" to the target one

define TEMP_WINDOW 1 // (degC) Window around target to start the residency timer x degC early.

// Bed temperature must be close to target for this long before M190 returns success

define TEMP_BED_RESIDENCY_TIME 6 // (seconds)

define TEMP_BED_HYSTERESIS 3 // (degC) range of +/- temperatures considered "close" to the target one

define TEMP_BED_WINDOW 1 // (degC) Window around target to start the residency timer x degC early.

// The minimal temperature defines the temperature below which the heater will not be enabled It is used
// to check that the wiring to the thermistor is not broken.
// Otherwise this would lead to the heater being powered on all the time.






define BED_MINTEMP 5

// When temperature exceeds max temp, your heater will be switched off.
// This feature exists to protect your hotend from overheating accidentally, but NOT from thermistor short/failure!
// You should use MINTEMP for thermistor short/failure protection.

define HEATER_0_MAXTEMP 275

define HEATER_1_MAXTEMP 275

define HEATER_2_MAXTEMP 275

define HEATER_3_MAXTEMP 275

define HEATER_4_MAXTEMP 275

define BED_MAXTEMP 130

//============================= PID Settings ================================
// PID Tuning Guide here: http://reprap.org/wiki/PID_Tuning

// Comment the following line to disable PID and enable bang-bang.

define PIDTEMP

define BANG_MAX 255 // limits current to nozzle while in bang-bang mode; 255=full current

define PID_MAX BANG_MAX // limits current to nozzle while PID is active (see PID_FUNCTIONAL_RANGE below); 255=full current


//#define PID_AUTOTUNE_MENU // Add PID Autotune to the LCD "Temperature" menu to run M303 and apply the result.
//#define PID_DEBUG // Sends debug data to the serial port.
//#define PID_OPENLOOP 1 // Puts PID in open loop. M104/M140 sets the output power from 0 to PID_MAX
//#define SLOW_PWM_HEATERS // PWM with very low frequency (roughly 0.125Hz=8s) and minimum state time of approximately 1s useful for heaters driven by a relay
//#define PID_PARAMS_PER_HOTEND // Uses separate PID parameters for each extruder (useful for mismatched extruders)
// Set/get with gcode: M301 E[extruder number, 0-2]

define PID_FUNCTIONAL_RANGE 15 // If the temperature difference between the target temperature and the actual temperature

                              // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.

define K1 0.95 //smoothing factor within the PID

// If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it

// Ultimaker
//#define DEFAULT_Kp 22.2
//#define DEFAULT_Ki 1.08
//#define DEFAULT_Kd 114

// MakerGear
//#define DEFAULT_Kp 7.0
//#define DEFAULT_Ki 0.1
//#define DEFAULT_Kd 12

// Mendel Parts V9 on 12V
//#define DEFAULT_Kp 63.0
//#define DEFAULT_Ki 2.25
//#define DEFAULT_Kd 440

// ANET A8 Standard Extruder at 210 Degree Celsius and 100% Fan
//(measured after M106 S255 with M303 E0 S210 C8)

define DEFAULT_Kp 21.0

define DEFAULT_Ki 1.25

define DEFAULT_Kd 86.0

endif // PIDTEMP

//============================= PID > Bed Temperature Control ===============
// Select PID or bang-bang with PIDTEMPBED. If bang-bang, BED_LIMIT_SWITCHING will enable hysteresis
// Uncomment this to enable PID on the bed. It uses the same frequency PWM as the extruder.
// If your PID_dT is the default, and correct for your hardware/configuration, that means 7.689Hz,
// which is fine for driving a square wave into a resistive load and does not significantly impact you FET heating.
// This also works fine on a Fotek SSR-10DA Solid State Relay into a 250W heater.
// If your configuration is significantly different than this and you don't understand the issues involved, you probably
// shouldn't use bed PID until someone else verifies your hardware works.
// If this is enabled, find your own PID constants below.
//#define PIDTEMPBED


// This sets the max power delivered to the bed, and replaces the HEATER_BED_DUTY_CYCLE_DIVIDER option.
// all forms of bed control obey this (PID, bang-bang, bang-bang with hysteresis)
// setting this to anything other than 255 enables a form of PWM to the bed just like HEATER_BED_DUTY_CYCLE_DIVIDER did,
// so you shouldn't use it unless you are OK with PWM on your bed. (see the comment on enabling PIDTEMPBED)

define MAX_BED_POWER 255 // limits duty cycle to bed; 255=full current


//#define PID_BED_DEBUG // Sends debug data to the serial port.

//120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
//from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggressive factor of .15 (vs .1, 1, 10)

define DEFAULT_bedKp 10.00

define DEFAULT_bedKi .023

define DEFAULT_bedKd 305.4

//120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
//from pidautotune
//#define DEFAULT_bedKp 97.1
//#define DEFAULT_bedKi 1.41
//#define DEFAULT_bedKd 1675.16

// FIND YOUR OWN: "M303 E-1 C8 S90" to run autotune on the bed at 90 degreesC for 8 cycles.


// @section extruder

// This option prevents extrusion if the temperature is below EXTRUDE_MINTEMP.
// It also enables the M302 command to set the minimum extrusion temperature
// or to allow moving the extruder regardless of the hotend temperature.



// This option prevents a single extrusion longer than EXTRUDE_MAXLENGTH.
// Note that for Bowden Extruders a too-small value here may prevent loading.



//======================== Thermal Runaway Protection =======================


  • Thermal Protection protects your printer from damage and fire if a
  • thermistor falls out or temperature sensors fail in any way.
  • The issue: If a thermistor falls out or a temperature sensor fails,
  • Marlin can no longer sense the actual temperature. Since a disconnected
  • thermistor reads as a low temperature, the firmware will keep the heater on.
  • If you get "Thermal Runaway" or "Heating failed" errors the
  • details can be tuned in Configuration_adv.h

define THERMAL_PROTECTION_HOTENDS // Enable thermal protection for all extruders

define THERMAL_PROTECTION_BED // Enable thermal protection for the heated bed

//============================= Mechanical Settings =========================

// @section machine

// Uncomment one of these options to enable CoreXY, CoreXZ, or CoreYZ kinematics
// either in the usual order or reversed
//#define COREXY
//#define COREXZ
//#define COREYZ
//#define COREYX
//#define COREZX
//#define COREZY

//============================== Endstop Settings ===========================

// @section homing

// Specify here all the endstop connectors that are connected to any endstop or probe.
// Almost all printers will be using one per axis. Probes will use one or more of the
// extra connectors. Leave undefined any used for non-endstop and non-probe purposes.




//#define USE_XMAX_PLUG
//#define USE_YMAX_PLUG
//#define USE_ZMAX_PLUG

// coarse Endstop Settings

define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors


// fine endstop settings: Individual pullups. will be ignored if ENDSTOPPULLUPS is defined


// Mechanical endstop with COM to ground and NC to Signal uses "false" here (most common setup).

define X_MIN_ENDSTOP_INVERTING true // set to true to invert the logic of the endstop.

define Y_MIN_ENDSTOP_INVERTING true // set to true to invert the logic of the endstop.

define Z_MIN_ENDSTOP_INVERTING true // set to true to invert the logic of the endstop.

define X_MAX_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.

define Y_MAX_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.

define Z_MAX_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.

define Z_MIN_PROBE_ENDSTOP_INVERTING true // set to true to invert the logic of the probe.

// Enable this feature if all enabled endstop pins are interrupt-capable.
// This will remove the need to poll the interrupt pins, saving many CPU cycles.


//============================== Movement Settings ============================
// @section motion


  • Default Settings
  • These settings can be reset by M502
  • Note that if EEPROM is enabled, saved values will override these.


  • With this option each E stepper can have its own factors for the
  • following movement settings. If fewer factors are given than the
  • total number of extruders, the last value applies to the rest.
    //#define DISTINCT_E_FACTORS


  • Default Axis Steps Per Unit (steps/mm)
  • Override with M92
  • X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]

    define DEFAULT_AXIS_STEPS_PER_UNIT {100, 100, 400, 95}


  • Default Max Feed Rate (mm/s)
  • Override with M203
  • X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]

    define DEFAULT_MAX_FEEDRATE {400, 400, 8, 50}


  • Default Max Acceleration (change/s) change = mm/s
  • (Maximum start speed for accelerated moves)
  • Override with M201
  • X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]

    define DEFAULT_MAX_ACCELERATION { 1000, 1000, 100, 5000 }


  • Default Acceleration (change/s) change = mm/s
  • Override with M204
  • M204 P Acceleration
  • M204 R Retract Acceleration
  • M204 T Travel Acceleration

    define DEFAULT_ACCELERATION 400 // X, Y, Z and E acceleration for printing moves

    define DEFAULT_RETRACT_ACCELERATION 1000 // E acceleration for retracts

    define DEFAULT_TRAVEL_ACCELERATION 400 // X, Y, Z acceleration for travel (non printing) moves


  • Default Jerk (mm/s)
  • Override with M205 X Y Z E
  • "Jerk" specifies the minimum speed change that requires acceleration.
  • When changing speed and direction, if the difference is less than the
  • value set here, it may happen instantaneously.

    define DEFAULT_XJERK 20.0

    define DEFAULT_YJERK 20.0

    define DEFAULT_ZJERK 0.3

    define DEFAULT_EJERK 5.0

//============================= Z Probe Options =============================
// @section probes

// See http://marlinfw.org/configuration/probes.html


  • Enable this option for a probe connected to the Z Min endstop pin.



  • Enable this option for a probe connected to any pin except Z-Min.
  • (By default Marlin assumes the Z-Max endstop pin.)
  • To use a custom Z Probe pin, set Z_MIN_PROBE_PIN below.
    • The simplest option is to use a free endstop connector.
    • Use 5V for powered (usually inductive) sensors.
    • RAMPS 1.3/1.4 boards may use the 5V, GND, and Aux4->D32 pin:
    • For simple switches connect...
    • normally-closed switches to GND and D32.
    • normally-open switches to 5V and D32.
  • WARNING: Setting the wrong pin may have unexpected and potentially
  • disastrous consequences. Use with caution and do your homework.
  • */
    //#define Z_MIN_PROBE_ENDSTOP
    //#define Z_MIN_PROBE_PIN Z_MAX_PIN


  • Probe Type
  • Allen Key Probes, Servo Probes, Z-Sled Probes, FIX_MOUNTED_PROBE, etc.
  • You must activate one of these to use Auto Bed Leveling below.


  • The "Manual Probe" provides a means to do "Auto" Bed Leveling without a probe.
  • Use G29 repeatedly, adjusting the Z height at each point with movement commands
  • or (with LCD_BED_LEVELING) the LCD controller.
    //#define PROBE_MANUALLY


  • A Fix-Mounted Probe either doesn't deploy or needs manual deployment.
  • (e.g., an inductive probe or a nozzle-based probe-switch.)



  • Z Servo Probe, such as an endstop switch on a rotating arm.
    //#define Z_ENDSTOP_SERVO_NR 0 // Defaults to SERVO 0 connector.
    //#define Z_SERVO_ANGLES {70,0} // Z Servo Deploy and Stow angles


  • The BLTouch probe uses a Hall effect sensor and emulates a servo.
    //#define BLTOUCH


    //#define BLTOUCH_DELAY 375 // (ms) Enable and increase if needed



  • Enable if probing seems unreliable. Heaters and/or fans - consistent with the
  • options selected below - will be disabled during probing so as to minimize
  • potential EM interference by quieting/silencing the source of the 'noise' (the change
  • in current flowing through the wires). This is likely most useful to users of the
  • BLTouch probe, but may also help those with inductive or other probe types.
    //#define PROBING_HEATERS_OFF // Turn heaters off when probing
    //#define PROBING_FANS_OFF // Turn fans off when probing

// A probe that is deployed and stowed with a solenoid pin (SOL1_PIN)

// A sled-mounted probe like those designed by Charles Bell.
//#define Z_PROBE_SLED
//#define SLED_DOCKING_OFFSET 5 // The extra distance the X axis must travel to pickup the sled. 0 should be fine but you can push it further if you'd like.

// For Z_PROBE_ALLEN_KEY see the Delta example configurations.


  • Z Probe to nozzle (X,Y) offset, relative to (0, 0).
  • X and Y offsets must be integers.
  • In the following example the X and Y offsets are both positive:


  • +-- BACK ---+
  • | |
  • L | (+) P | R <-- probe (20,20)
  • E | | I
  • F | (-) N (+) | G <-- nozzle (10,10)
  • T | | H
  • | (-) | T
  • | |
  • O-- FRONT --+
  • (0,0)

    define X_PROBE_OFFSET_FROM_EXTRUDER 22 // X offset: -left +right [of the nozzle]

    define Y_PROBE_OFFSET_FROM_EXTRUDER 70 // Y offset: -front +behind [the nozzle]

    define Z_PROBE_OFFSET_FROM_EXTRUDER 0 // Z offset: -below +above [the nozzle]

//#define X_PROBE_OFFSET_FROM_EXTRUDER -28 // X offset: -left +right [of the nozzle]
//#define Y_PROBE_OFFSET_FROM_EXTRUDER -45 // Y offset: -front +behind [the nozzle]
//#define Z_PROBE_OFFSET_FROM_EXTRUDER 0 // Z offset: -below +above [the nozzle]

//#define X_PROBE_OFFSET_FROM_EXTRUDER -1 // X offset: -left +right [of the nozzle]
//#define Y_PROBE_OFFSET_FROM_EXTRUDER 3 // Y offset: -front +behind [the nozzle]
//#define Z_PROBE_OFFSET_FROM_EXTRUDER 0 // Z offset: -below +above [the nozzle]

// X and Y axis travel speed (mm/m) between probes

define XY_PROBE_SPEED 6000

// Speed for the first approach when double-probing (with PROBE_DOUBLE_TOUCH)


// Speed for the "accurate" probe of each point


// Use double touch for probing


  • Z probes require clearance when deploying, stowing, and moving between
  • probe points to avoid hitting the bed and other hardware.
  • Servo-mounted probes require extra space for the arm to rotate.
  • Inductive probes need space to keep from triggering early.
  • Use these settings to specify the distance (mm) to raise the probe (or
  • lower the bed). The values set here apply over and above any (negative)
  • probe Z Offset set with Z_PROBE_OFFSET_FROM_EXTRUDER, M851, or the LCD.
  • Only integer values >= 1 are valid here.
  • Example: M851 Z-5 with a CLEARANCE of 4 => 9mm from bed to nozzle.
  • But: M851 Z+1 with a CLEARANCE of 2 => 2mm from bed to nozzle.

    define Z_CLEARANCE_DEPLOY_PROBE 10 // Z Clearance for Deploy/Stow

    define Z_CLEARANCE_BETWEEN_PROBES 5 // Z Clearance between probe points

// For M851 give a range for adjusting the Z probe offset



// Enable the M48 repeatability test to test probe accuracy

// For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
// :{ 0:'Low', 1:'High' }

define X_ENABLE_ON 0

define Y_ENABLE_ON 0

define Z_ENABLE_ON 0

define E_ENABLE_ON 0 // For all extruders

// Disables axis stepper immediately when it's not being used.
// WARNING: When motors turn off there is a chance of losing position accuracy!

define DISABLE_X false

define DISABLE_Y false

define DISABLE_Z false

// Warn on display about possibly reduced accuracy

// @section extruder

define DISABLE_E false // For all extruders

define DISABLE_INACTIVE_EXTRUDER true // Keep only the active extruder enabled.

// @section machine

// Invert the stepper direction. Change (or reverse the motor connector) if an axis goes the wrong way.

define INVERT_X_DIR false

define INVERT_Y_DIR false

define INVERT_Z_DIR true

// Enable this option for Toshiba stepper drivers

// @section extruder

// For direct drive extruder v9 set to true, for geared extruder set to false.

define INVERT_E0_DIR false

define INVERT_E1_DIR false

define INVERT_E2_DIR false

define INVERT_E3_DIR false

define INVERT_E4_DIR false

// @section homing

//#define Z_HOMING_HEIGHT 4 // (in mm) Minimal z height before homing (G28) for Z clearance above the bed, clamps, ...
// Be sure you have this distance over your Z_MAX_POS in case.

// Direction of endstops when homing; 1=MAX, -1=MIN
// :[-1,1]

define X_HOME_DIR -1

define Y_HOME_DIR -1

define Z_HOME_DIR -1

// @section machine

// Travel limits after homing (units are in mm)

define X_MAX_POS 220

define X_MIN_POS -33

define Y_MAX_POS 220

define Y_MIN_POS -10

define Z_MAX_POS 240

define Z_MIN_POS 0

// If enabled, axes won't move below MIN_POS in response to movement commands.


// If enabled, axes won't move above MAX_POS in response to movement commands.



  • Filament Runout Sensor
  • A mechanical or opto endstop is used to check for the presence of filament.
  • RAMPS-based boards use SERVO3_PIN.
  • For other boards you may need to define FIL_RUNOUT_PIN.
  • By default the firmware assumes HIGH = has filament, LOW = ran out


    define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.

    define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.



//=============================== Bed Leveling ==============================
// @section bedlevel


  • Choose one of the options below to enable G29 Bed Leveling. The parameters
  • and behavior of G29 will change depending on your selection.
  • If using a Probe for Z Homing, enable Z_SAFE_HOMING also!
  • Probe 3 arbitrary points on the bed (that aren't collinear)
  • You specify the XY coordinates of all 3 points.
  • The result is a single tilted plane. Best for a flat bed.
  • Probe several points in a grid.
  • You specify the rectangle and the density of sample points.
  • The result is a single tilted plane. Best for a flat bed.
  • Probe several points in a grid.
  • You specify the rectangle and the density of sample points.
  • The result is a mesh, best for large or uneven beds.
    • AUTO_BED_LEVELING_UBL (Unified Bed Leveling)
  • A comprehensive bed leveling system combining the features and benefits
  • of other systems. UBL also includes integrated Mesh Generation, Mesh
  • Validation and Mesh Editing systems. Currently, UBL is only checked out
  • for Cartesian Printers. That said, it was primarily designed to correct
  • poor quality Delta Printers. If you feel adventurous and have a Delta,
  • please post an issue if something doesn't work correctly. Initially,
  • you will need to set a reduced bed size so you have a rectangular area
  • to test on.
  • Probe a grid manually
  • The result is a mesh, suitable for large or uneven beds. (See BILINEAR.)
  • For machines without a probe, Mesh Bed Leveling provides a method to perform
  • leveling in steps so you can manually adjust the Z height at each grid-point.
  • With an LCD controller the process is guided step-by-step.


    //#define MESH_BED_LEVELING


  • Enable detailed logging of G28, G29, M48, etc.
  • Turn on with the command 'M111 S32'.
  • NOTE: Requires a lot of PROGMEM!


// Gradually reduce leveling correction until a set height is reached,
// at which point movement will be level to the machine's XY plane.
// The height can be set with M420 Z




// Set the number of grid points per dimension.



// Set the boundaries for probing (where the probe can reach).





// The Z probe minimum outer margin (to validate G29 parameters).

define MIN_PROBE_EDGE 10

// Probe along the Y axis, advancing X after each column
//#define PROBE_Y_FIRST


// Beyond the probed grid, continue the implied tilt?
// Default is to maintain the height of the nearest edge.

// Experimental Subdivision of the grid by Catmull-Rom method.
// Synthesizes intermediate points to produce a more detailed mesh.
  // Number of subdivisions between probe points



// 3 arbitrary points to probe.
// A simple cross-product is used to estimate the plane of the bed.

define ABL_PROBE_PT_1_X 20//15

define ABL_PROBE_PT_1_Y 160//180

define ABL_PROBE_PT_2_X 20//15

define ABL_PROBE_PT_2_Y 10//20

define ABL_PROBE_PT_3_X 180//170

define ABL_PROBE_PT_3_Y 10//20


//========================= Unified Bed Leveling ============================

define UBL_MESH_INSET 1 // Mesh inset margin on print area

define GRID_MAX_POINTS_X 10 // Don't use more than 15 points per axis, implementation limited.


define UBL_PROBE_PT_1_X 39 // These set the probe locations for when UBL does a 3-Point leveling

define UBL_PROBE_PT_1_Y 180 // of the mesh.

define UBL_PROBE_PT_2_X 39

define UBL_PROBE_PT_2_Y 20

define UBL_PROBE_PT_3_X 180

define UBL_PROBE_PT_3_Y 20

define UBL_G26_MESH_VALIDATION // Enable G26 mesh validation

define UBL_MESH_EDIT_MOVES_Z // Sophisticated users prefer no movement of nozzle


//=================================== Mesh ==================================

define MESH_INSET 10 // Mesh inset margin on print area

define GRID_MAX_POINTS_X 3 // Don't use more than 7 points per axis, implementation limited.


//#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS



  • Use the LCD controller for bed leveling
    //#define LCD_BED_LEVELING


define MBL_Z_STEP 0.025 // Step size while manually probing Z axis.

define LCD_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment



  • Commands to execute at the end of G29 probing.
  • Useful to retract or move the Z probe out of the way.
    //#define Z_PROBE_END_SCRIPT "G1 Z10 F12000\nG1 X15 Y330\nG1 Z0.5\nG1 Z10"

// @section homing

// The center of the bed is at (X=0, Y=0)

define BED_CENTER_AT_160_110

// Manually set the home position. Leave these undefined for automatic settings.
// For DELTA this is the top-center of the Cartesian print volume.
//#define MANUAL_X_HOME_POS 0
//#define MANUAL_Y_HOME_POS 0
//#define MANUAL_Z_HOME_POS 0

// Use "Z Safe Homing" to avoid homing with a Z probe outside the bed area.
// With this feature enabled:
// - Allow Z homing only after X and Y homing AND stepper drivers still enabled.
// - If stepper drivers time out, it will need X and Y homing again before Z homing.
// - Move the Z probe (or nozzle) to a defined XY point before Z Homing when homing all axes (G28).
// - Prevent Z homing when the Z probe is outside bed area.



define Z_SAFE_HOMING_X_POINT (X_MAX_POS / 2) // X point for Z homing when homing all axis (G28).

define Z_SAFE_HOMING_Y_POINT (Y_MAX_POS / 2) // Y point for Z homing when homing all axis (G28).


// Homing speeds (mm/m)

define HOMING_FEEDRATE_XY (100*60)

define HOMING_FEEDRATE_Z (4*60)

//============================= Additional Features ===========================

// @section extras

// The microcontroller can store settings in the EEPROM, e.g. max velocity...
// M500 - stores parameters in EEPROM
// M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
// M502 - reverts to the default "factory settings". You still need to store them in EEPROM afterwards if you want to.
//define this to enable EEPROM support



// To disable EEPROM Serial responses and decrease program space by ~1700 byte: comment this out:

define EEPROM_CHITCHAT // Please keep turned on if you can.


// Host Keepalive
// When enabled Marlin will send a busy status message to the host
// every couple of seconds when it can't accept commands.
//#define HOST_KEEPALIVE_FEATURE // Disable this if your host doesn't like keepalive messages
//#define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.

// M100 Free Memory Watcher
//#define M100_FREE_MEMORY_WATCHER // uncomment to add the M100 Free Memory Watcher for debug purpose

// G20/G21 Inch mode support

// M149 Set temperature units support

// @section temperature

// Preheat Constants


define PREHEAT_1_TEMP_BED 60

define PREHEAT_1_FAN_SPEED 0 // Value from 0 to 255


define PREHEAT_2_TEMP_BED 90

define PREHEAT_2_FAN_SPEED 0 // Value from 0 to 255


  • Nozzle Park -- EXPERIMENTAL
  • Park the nozzle at the given XYZ position on idle or G27.
  • The "P" parameter controls the action applied to the Z axis:
  • P0 (Default) If Z is below park Z raise the nozzle.
  • P1 Raise the nozzle always to Z-park height.
  • P2 Raise the nozzle by Z-park amount, limited to Z_MAX_POS.


// Specify a park position as { X, Y, Z }

define NOZZLE_PARK_POINT { (X_MIN_POS + 10), (Y_MAX_POS - 10), 20 }



  • Clean Nozzle Feature -- EXPERIMENTAL
  • Adds the G12 command to perform a nozzle cleaning process.
  • Parameters:
  • P Pattern
  • S Strokes / Repetitions
  • T Triangles (P1 only)
  • Patterns:
  • P0 Straight line (default). This process requires a sponge type material
  • at a fixed bed location. "S" specifies strokes (i.e. back-forth motions)
  • between the start / end points.
  • P1 Zig-zag pattern between (X0, Y0) and (X1, Y1), "T" specifies the
  • number of zig-zag triangles to do. "S" defines the number of strokes.
  • Zig-zags are done in whichever is the narrower dimension.
  • For example, "G12 P1 S1 T3" will execute:
  • --
  • | (X0, Y1) | /\ /\ /\ | (X1, Y1)
  • | | / \ / \ / \ |
  • A | | / \ / \ / \ |
  • | | / \ / \ / \ |
  • | (X0, Y0) | / \/ \/ \ | (X1, Y0)
  • -- +--------------------------------+
  • |____|||
  • T1 T2 T3
  • P2 Circular pattern with middle at NOZZLE_CLEAN_CIRCLE_MIDDLE.
  • "R" specifies the radius. "S" specifies the stroke count.
  • Before starting, the nozzle moves to NOZZLE_CLEAN_START_POINT.
  • Caveats: The ending Z should be the same as starting Z.
  • Attention: EXPERIMENTAL. G-code arguments may change.
  • */


// Default number of pattern repetitions


// Default number of triangles


// Specify positions as { X, Y, Z }

define NOZZLE_CLEAN_START_POINT { 30, 30, (Z_MIN_POS + 1)}

define NOZZLE_CLEAN_END_POINT {100, 60, (Z_MIN_POS + 1)}

// Circular pattern radius


// Circular pattern circle fragments number


// Middle point of circle


// Moves the nozzle to the initial position




  • Print Job Timer
  • Automatically start and stop the print job timer on M104/M109/M190.
  • M104 (hotend, no wait) - high temp = none, low temp = stop timer
  • M109 (hotend, wait) - high temp = start timer, low temp = stop timer
  • M190 (bed, wait) - high temp = start timer, low temp = none
  • The timer can also be controlled with the following commands:
  • M75 - Start the print job timer
  • M76 - Pause the print job timer
  • M77 - Stop the print job timer



  • Print Counter
  • Track statistical data such as:
    • Total print jobs
    • Total successful print jobs
    • Total failed print jobs
    • Total time printing
  • View the current statistics with M78.
    //#define PRINTCOUNTER

//============================= LCD and SD support ============================

// @section lcd


  • Select the language to display on the LCD. These languages are available:
  • en, an, bg, ca, cn, cz, de, el, el-gr, es, eu, fi, fr, gl, hr, it,
  • kana, kana_utf8, nl, pl, pt, pt_utf8, pt-br, pt-br_utf8, ru, tr, uk, test
  • :{ 'en':'English', 'an':'Aragonese', 'bg':'Bulgarian', 'ca':'Catalan', 'cn':'Chinese', 'cz':'Czech', 'de':'German', 'el':'Greek', 'el-gr':'Greek (Greece)', 'es':'Spanish', 'eu':'Basque-Euskera', 'fi':'Finnish', 'fr':'French', 'gl':'Galician', 'hr':'Croatian', 'it':'Italian', 'kana':'Japanese', 'kana_utf8':'Japanese (UTF8)', 'nl':'Dutch', 'pl':'Polish', 'pt':'Portuguese', 'pt-br':'Portuguese (Brazilian)', 'pt-br_utf8':'Portuguese (Brazilian UTF8)', 'pt_utf8':'Portuguese (UTF8)', 'ru':'Russian', 'tr':'Turkish', 'uk':'Ukrainian', 'test':'TEST' }

    define LCD_LANGUAGE en


  • LCD Character Set
  • Note: This option is NOT applicable to Graphical Displays.
  • All character-based LCDs provide ASCII plus one of these
  • language extensions:
    • JAPANESE ... the most common
    • WESTERN ... with more accented characters
    • CYRILLIC ... for the Russian language
  • To determine the language extension installed on your controller:
    • Compile and upload with LCD_LANGUAGE set to 'test'
    • Click the controller to view the LCD menu
    • The LCD will display Japanese, Western, or Cyrillic text
  • See https://github.com/MarlinFirmware/Marlin/wiki/LCD-Language



  • Enable ULTRA_LCD for a 16x2, 16x4, 20x2, or 20x4 character-based LCD.
  • Enable DOGLCD for a 128x64 (ST7565R) Full Graphical Display.
  • (These options will be enabled automatically for most displays.)
  • IMPORTANT: The U8glib library is required for Full Graphic Display!
  • https://github.com/olikraus/U8glib_Arduino
    //#define ULTRA_LCD // Character based
    //#define DOGLCD // Full graphics display


// RepRap Discount (with Anet Adapter wiring see: http://www.thingiverse.com/thing:2103748)


  • SD Card support is disabled by default. If your controller has an SD slot,
  • you must uncomment the following option or it won't work.
  • */

    define SDSUPPORT


  • Enable one of the following items for a slower SPI transfer speed.
  • This may be required to resolve "volume init" errors.


  • Use CRC checks and retries on the SD communication.
    //#define SD_CHECK_AND_RETRY

// This option overrides the default number of encoder pulses needed to
// produce one step. Should be increased for high-resolution encoders.

// Use this option to override the number of step signals required to
// move between next/prev menu items.


  • Encoder Direction Options
  • Test your encoder's behavior first with both options disabled.
  • Reversed Value Edit and Menu Nav? Enable REVERSE_ENCODER_DIRECTION.
  • Reversed Menu Navigation only? Enable REVERSE_MENU_DIRECTION.
  • Reversed Value Editing only? Enable BOTH options.

// This option reverses the encoder direction everywhere.
// Set this option if CLOCKWISE causes values to DECREASE

// This option reverses the encoder direction for navigating LCD menus.
// If CLOCKWISE normally moves DOWN this makes it go UP.
// If CLOCKWISE normally moves UP this makes it go DOWN.

// Individual Axis Homing
// Add individual axis homing items (Home X, Home Y, and Home Z) to the LCD menu.

// If you have a speaker that can produce tones, enable it here.
// By default Marlin assumes you have a buzzer with a fixed frequency.
//#define SPEAKER

// The duration and frequency for the UI feedback sound.
// Set these to 0 to disable audio feedback in the LCD menus.
// Note: Test audio output with the G-Code:
// M300 S P

// Marlin supports a wide variety of controllers.
// Enable one of the following options to specify your controller.

// ULTIMAKER Controller.

// ULTIPANEL as seen on Thingiverse.
//#define ULTIPANEL

// Cartesio UI
// http://mauk.cc/webshop/cartesio-shop/electronics/user-interface
//#define CARTESIO_UI

// PanelOne from T3P3 (via RAMPS 1.4 AUX2/AUX3)
// http://reprap.org/wiki/PanelOne
//#define PANEL_ONE

// MaKr3d Makr-Panel with graphic controller and SD support.
// http://reprap.org/wiki/MaKr3d_MaKrPanel
//#define MAKRPANEL

// ReprapWorld Graphical LCD
// https://reprapworld.com/?products_details&products_id/1218

// Activate one of these if you have a Panucatt Devices
// Viki 2.0 or mini Viki with Graphic LCD
// http://panucatt.com
//#define VIKI2
//#define miniVIKI

// Adafruit ST7565 Full Graphic Controller.
// https://github.com/eboston/Adafruit-ST7565-Full-Graphic-Controller/

// RepRapDiscount Smart Controller.
// http://reprap.org/wiki/RepRapDiscount_Smart_Controller
// Note: Usually sold with a white PCB.

// GADGETS3D G3D LCD/SD Controller
// http://reprap.org/wiki/RAMPS_1.3/1.4_GADGETS3D_Shield_with_Panel
// Note: Usually sold with a blue PCB.
//#define G3D_PANEL

// RepRapDiscount FULL GRAPHIC Smart Controller
// http://reprap.org/wiki/RepRapDiscount_Full_Graphic_Smart_Controller

// MakerLab Mini Panel with graphic
// controller and SD support - http://reprap.org/wiki/Mini_panel
//#define MINIPANEL

// http://reprapworld.com/?products_details&products_id=202&cPath=1591_1626
// REPRAPWORLD_KEYPAD_MOVE_STEP sets how much should the robot move when a key
// is pressed, a value of 10.0 means 10mm per click.
//#define ADC_KEYPAD

// RigidBot Panel V1.0
// http://www.inventapart.com/

// BQ LCD Smart Controller shipped by
// default with the BQ Hephestos 2 and Witbox 2.

// Note: These controllers require the installation of Arduino's LiquidCrystal_I2C
// library. For more info: https://github.com/kiyoshigawa/LiquidCrystal_I2C

// Elefu RA Board Control Panel
// http://www.elefu.com/index.php?route=product/product&product_id=53

// Sainsmart YW Robot (LCM1602) LCD Display

// Generic LCM1602 LCD adapter
//#define LCM1602

// PANELOLU2 LCD with status LEDs,
// separate encoder and click inputs.
// Note: This controller requires Arduino's LiquidTWI2 library v1.2.3 or later.
// For more info: https://github.com/lincomatic/LiquidTWI2
// Note: The PANELOLU2 encoder click input can either be directly connected to
// a pin (if BTN_ENC defined to != -1) or read through I2C (when BTN_ENC == -1).
//#define LCD_I2C_PANELOLU2

// Panucatt VIKI LCD with status LEDs,
// integrated click & L/R/U/D buttons, separate encoder inputs.
//#define LCD_I2C_VIKI

// SSD1306 OLED full graphics generic display
//#define U8GLIB_SSD1306

// SAV OLEd LCD module support using either SSD1306 or SH1106 based LCD modules
//#define SAV_3DGLCD


//#define U8GLIB_SSD1306

define U8GLIB_SH1106


// CONTROLLER TYPE: Shift register panels
// 2 wire Non-latching LCD SR from https://goo.gl/aJJ4sH
// LCD configuration: http://reprap.org/wiki/SAV_3D_LCD
//#define SAV_3DLCD

// TinyBoy2 128x64 OLED / Encoder Panel

//=============================== Extra Features ==============================

// @section extras

// Increase the FAN PWM frequency. Removes the PWM noise but increases heating in the FET/Arduino
//#define FAST_PWM_FAN

// Use software PWM to drive the fan, as for the heaters. This uses a very low frequency
// which is not as annoying as with the hardware PWM. On the other hand, if this frequency
// is too low, you should also increment SOFT_PWM_SCALE.
//#define FAN_SOFT_PWM

// Incrementing this by 1 will double the software PWM frequency,
// affecting heaters, and the fan if FAN_SOFT_PWM is enabled.
// However, control resolution will be halved for each increment;
// at zero value, there are 128 effective control positions.


// If SOFT_PWM_SCALE is set to a value higher than 0, dithering can
// be used to mitigate the associated resolution loss. If enabled,
// some of the PWM cycles are stretched so on average the desired
// duty cycle is attained.

// Temperature status LEDs that display the hotend and bed temperature.
// If all hotends, bed temperature, and target temperature are under 54C
// then the BLUE led is on. Otherwise the RED led is on. (1C hysteresis)
//#define TEMP_STAT_LEDS

// M240 Triggers a camera by emulating a Canon RC-1 Remote
// Data from: http://www.doc-diy.net/photo/rc-1_hacked/
//#define PHOTOGRAPH_PIN 23

// SkeinForge sends the wrong arc g-codes when using Arc Point as fillet procedure
//#define SF_ARC_FIX

// Support for the BariCUDA Paste Extruder.
//#define BARICUDA

//define BlinkM/CyzRgb Support
//#define BLINKM


  • RGB LED / LED Strip Control
  • Enable support for an RGB LED connected to 5V digital pins, or
  • an RGB Strip connected to MOSFETs controlled by digital pins.
  • Adds the M150 command to set the LED (or LED strip) color.
  • If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
  • luminance values can be set from 0 to 255.
  • LED Strips require a MOFSET Chip between PWM lines and LEDs,
  • as the Arduino cannot handle the current the LEDs will require.
  • Failure to follow this precaution can destroy your Arduino!
  • */
    //#define RGB_LED
    //#define RGBW_LED


    define RGB_LED_R_PIN 34

    define RGB_LED_G_PIN 43

    define RGB_LED_B_PIN 35

    define RGB_LED_W_PIN -1



  • Printer Event LEDs
  • During printing, the LEDs will reflect the printer status:
    • Gradually change from blue to violet as the heated bed gets to target temp
    • Gradually change from violet to red as the hotend gets to temperature
    • Change to white to illuminate work surface
    • Change to green once print has finished
    • Turn off after the print has finished and the user has pushed a button





  • R/C SERVO support
  • Sponsored by TrinityLabs, Reworked by codexmas

// Number of servos
// If you select a configuration below, this will receive a default value and does not need to be set manually
// set it manually if you have more servos than extruders and wish to manually control some
// leaving it undefined or defining as 0 will disable the servo subsystem
// If unsure, leave commented / disabled
//#define NUM_SERVOS 3 // Servo index starts with 0 for M280 command

// Delay (in milliseconds) before the next move will start, to give the servo time to reach its target angle.
// 300ms is a good value but you can try less delay.
// If the servo can't reach the requested position, increase it.

define SERVO_DELAY 300

// Servo deactivation
// With this option servos are powered only during movement, then turned off to prevent jitter.


  • Filament Width Sensor
  • Measures the filament width in real-time and adjusts
  • flow rate to compensate for any irregularities.
  • Also allows the measured filament diameter to set the
  • extrusion rate, so the slicer only has to specify the
  • volume.
  • Only a single extruder is supported at this time.
  • 34 RAMPS_14 : Analog input 5 on the AUX2 connector
  • 81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
  • 301 RAMBO : Analog input 3
  • Note: May require analog pins to be defined for other boards.

define DEFAULT_NOMINAL_FILAMENT_DIA 3.00 // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.


define FILAMENT_SENSOR_EXTRUDER_NUM 0 // Index of the extruder that has the filament sensor (0,1,2,3)

define MEASUREMENT_DELAY_CM 14 // (cm) The distance from the filament sensor to the melting chamber

define MEASURED_UPPER_LIMIT 3.30 // (mm) Upper limit used to validate sensor reading

define MEASURED_LOWER_LIMIT 1.90 // (mm) Lower limit used to validate sensor reading

define MAX_MEASUREMENT_DELAY 20 // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.


// Display filament width on the LCD status line. Status messages will expire after 5 seconds.




G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
M107 ;start with the fan off
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops
G1 Z15.0 F9000 ;move the platform down 15mm
G92 E0 ;zero the extruded length
G1 F200 E3 ;extrude 3mm of feed stock
G92 E0 ;zero the extruded length again
G1 F9000;Put printing message on LCD screen
M117 Printing..

The Essential Calibration Set
XY 20 mm Calibration Box
DEPRECATED: LCD 12864 RepRap Discount Anet A8 Adapter
by OderWat

Here is the problem within the code:

// The center of the bed is at (X=0, Y=0)

define BED_CENTER_AT_160_110

Download https://www.thingiverse.com/thing:1707911
then define the center of your bed vs the center of the print, then enter those numbers; (X=0, Y=0)
X=0, Y=0, is the park location....

https://youtu.be/AU6bV2T5Hts hope this helps.

Centering target

The center of the Anet A8 is X=110 Y=110

I should have explained it more clearly, I copied paste his code as "define BED_CENTER_AT_160_110". You are right, center is (110, 110) for the stock frame. But in my case its not (110, 110), since i transitioned into metal frame.

Ah yeah, in the newer Marlin it's actually math.

You set the bed size
// The size of the print bed
#define X_BED_SIZE 220
#define Y_BED_SIZE 220

Then it will use that to calculate the edges and center.
#define Z_SAFE_HOMING_X_POINT ((X_BED_SIZE) / 2) // X point for Z homing when homing all axes (G28).
#define Z_SAFE_HOMING_Y_POINT ((Y_BED_SIZE) / 2) // Y point for Z homing when homing all axes (G28).

This is Marlin 1.1.9. The Z Safe Homing is used by default and should be used for this is the software endstop that keeps the machine form crashing. It's taking the X and Y bed size and diving it by 2 to find center.

The old manual define bed center is commented out by default.

// The center of the bed is at (X=0, Y=0)
//#define BED_CENTER_AT_0_0

And it should stay that way!

Bed Center Calibration Tutorial (using parametric crosshairs with square)
by 0scar

It’s connected through usb, is the baud rate really an issue?

The baud rate specifically applies to USB since it is the only way to hook to the board and send or receive data. Considering how crap and slow the OEM board is I wouldn't go higher than 9600 to save memory.

Remember the stock Anet board is an Arduino Uno, a RAMPS runs on a Mega2560.

The stock board has ~2KB RAM with 1KB EEPROM and 32KB flash with .5KB used to boot

The Mega has 8KB RAM and 4KB EEPROM and 256KB flash with an 8K bootloader.

Since it’s in part an issue, would you recommend a board to upgrade to? One that won’t cost an arm and a leg? So changing the baud rate will change where the print center will be at? Sorry that part just confuses me, but thanks, when I get home from work I will give that a shot

RAMPS, see my guide. Takes a lot of time and about $50.

No the baud rate wont help your center issue but it will stop cura from crashing the printer and failing the print.

Did you replace the configuration.h file with the Anet A8 version found in the "Marlin\example_configurations\Anet\A8" folder.

One thing that makes me think you didn't is the baud rate is incorrect for the Anet A8. There are several changes you will want to make before flashing the firmware.

The link below covers the changes starting at 6:30

ok, changes made per the video, now there is this error
Configuration_adv.h:1031: error: missing binary operator before token "("


if HAS_DRIVER(L6470)

any suggestions?

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My suggestion is to post your config as an attachment, still :p

ok, so that video has "old" configurations, according to the errors, so I went back to the defaults, and we are back to Z Home being right at the X,Y home, i'm not sure if that's an improvement or not
but here is where i am at, still looking to get the auto level probe (the fixed blue type if that was not mentioned before, in the back on the right, facing the printer), and getting the printer to print at the center of the bed

Well I never used a probe on the stock board but I know the firmware. You need to issue G29 to autolevel before a print. I would set your level to Bilinear in the firmware, it is easiest to use with good results with those sensors. I noticed you have it set to Linear which only levels in one axis. You will need to also set the offset of the probe with M851. Be sure to save changes with M500!

Included is my start and end g code from cura
Looking at your config is your probe offset set correctly for the mounting you are using? It's set to 10mm to the right and to the back of the nozzle.

When the machine autolevels the probe is center, when you home it the nozzle should go to center based on the offsets.

also, how do i change it so it will complete those 9 auto sensor checks faster, cause man it ook like 4 mintues

Wow, hah. Uh... mine takes about 30 seconds to do all 9.

It's set by the homing feedrate so you could tweak that up, a little bit. I would change it from #define HOMING_FEEDRATE_XY (100*60) to #define HOMING_FEEDRATE_XY (100*80) and see if that helps. Re-load the firmware and issue a M501 then M500 over serial console to load the changes into memory.

and sidetrack for a second, if you do'nt mind I pick your brain about 2 things I can't figure out
I got the self lubricating sliding things that the bed slides on (sorry I work nights, words are hard), and now all of a sudden since putting everyhting back together (I had a failed attempt at a bed belt tensioner) when I tighten the springs for the bed plate, it makes the whol bed really get stiff and causes the belt to skip, something it didn't use to do, so right now I have everything about as loose as I can safely get it, any ideas about that? I wanted to print one of those belt tensioners that youtighten from the front of the printer, but the spaces for the notches to go in are much smaller, i can't figure out how everyone has gotten them to fit??
and sorry again for monopolizing your time, i can't thank ya enough

Ok so yeah. You need to make sure the threaded rods are straight and tight. Then the bearing blocks should be installed loose on the bed and tightend at one far end of the travel, it should slide easy and the spring should not change it. something weird is going on there. I run Dryplin solid bearings which you run dry, and they work awesome. No chatter!

As for the tensioner, both my machines have them and I had to sand the legs down a fair amount, maybe I will redesign my own that fits.

ok so it all seems to be as it should, man I can't thank ya enough......

one last thing (promise) aside from those previous questions, I saw something about a heat temp print tower type thing, for testing the right temp to set stuff, I am lost on how you go about changing the temp mid print, have you come across that by any chance?

I have but again Octoprint can do that or you can do it from the printer menu on the LCD of RAMPS with Marlin. not sure about your setup.

dont you need a rasberry pi for octoprint?

or some linux board computer, see my Octoprint Guide

Octoprint and GPIO Control Tutorial!

maybe I will go back to that at some point, when i've levelled up a few in this skill, until then there's gotta be another program I can edit stl files somewhere i'm sure...
thanks again, I must hit the sack, we work nights and I should already be dead asleep, was just hoping to get this sorted out before i crashed.
thanks again mate

Sleep well and no problem!

Keep leveling up!

Also check out Meshmixer

 Sorted out the bed issue, turns out when I mounted it to a board it was just slightly crooked, that’s why it was getting really tight (whew)

 I had one last question about the m codes, are you supposed to get any sort of notificTion when doing the m500 code that it saves? And then do I need to put in the M501 code in the gcode in Cura?
 Actually, one last question, when I put the g29 autonlevel code (g29 f6000), it won’t actually do the 9 level points unless I take out the f6000, does that make sense why it wouldn’t work?

I see you figured out how to post code!

The G29 is just a G29, you can't add anything to it, see my start G-code I posted before. You can see more at Marlin G-code

Glad you got the bed fixed!

Thanks again for all the help, it’s literally printing better than it ever had before, now I feel dumb for waiting on the smoother and the mofset add ons, (and here’s hoping I’ll never haveta code again)!!

Coding is fun, wait, no it's not :p

Glad to hear it's better. I would still put a MOSFET on your hotbed, it really can save... your life! At minimum more frustration and replacing a board because it melted.

Oh, yeah, there are two now, the second was just a few days behind since I thought I’d ordered two the first tine

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I tried using a LCD temp setting soldering gun ( i got the idea from a smoother they wanted $125 for), this was $10, hehe. I will have to give it another try. and I guess I should give it another go, and try using sandpaper.

what design programs can you use? is it ok to download an STL file and modify it maybe? could be good to learn that as well.

and I enabled the safe z home or whatnot, and it's all a bit off on the probe offsets, but the z home was actually on the bed!!

OK so safe Z homing should be on. This helps it not crash into the bed but must be setup right.

I made video of Printer #2 Starting so you can see how it auto levels.

i don't know how to input it, but wouldn't it be the z_homing command?

ok, so after you do that with the auto level (i'm sorting out how to do the probe offsets as we speak), I then do the 2 m codes using cura, and that will load it into the printer memory? ok

any idea how I get the z home off the far left and in the least on the bed so I don't have to catch it with a screwdriver?

g29 will work, though the first is almost too far to the left, and the last 3 are putting the probe off the bed, then it says "click to resume" (that is new)

and it seems that using a g0 code in cura, from the X,Y home inputting G0 X7.75 Y2.5 pretty much gets me to the front left corner (facing the printer) I just don't know how/where to put that in for any effect
And if I haven't said it, thanks so much for the help, you are my personal printer lord and savior

Yup G0 and G1 are simply move code. Like G0 Z10 X110 Y110 F8000 should move the printer pretty quickly to the center of the build surface and 10mm between the bed and nozzle. All the given commands are in MM.

G0 is the command
Z is the Z height
Y is the Y distance from back to front
X is the X distance from left to right
F is the feedrate, or the rate it moves in mm/min

where do i place the commands? in cura or in the marlin? sorry I really am pulling this coding directly out of my arse

The M commands? They are Marlin commands, you send them via serial connection to the machine. I use the terminal in Octoprint but you can use Putty on a computer. You just have to set it to use serial and set the baud rate and port then connect to the printer over the USB cable. This will let you send and receive from the printer.

I'm sure there's other ways but I'm not familiar with them, that's just my old school way of doing it.

and I was wrong, apparenly when i was testing that code i mentioned, i wasn't going to back to zero or whatever, so it was just adding and adding rather than resetting, so those numbers were off
where in marlin would i place those codes to try and get the front left set as o,o? I am assuming if I did this it should actually get the priinter to find it's center?

It's already in there, you don't set that as home. Can you send a G28 to the printer and see where it goes? That should home all axis and end center of the bed 10mm up. Do you have a stock carriage?

and the g28 works as it should, including the z home issue i'm having

yes stock on all things, just some frame brace parts etc. what's really messing with me is the z home not going to the bed, I have to stop it each time as there's no bed/metal to have the probe trigger

Lol, ya lost me. I only know inputting code in marlin, and in the atart and end g-code in cura

WOOF! That's a post.

Did you use the included example configs with Marlin?

Did you set the offsets?

See my Marlin guide for more info on that. if you are using aftermarket carriages they builder should have posted offsets, if not don't use it!

I also have the RAMPS guide and a whole line of upgrade parts I made for my machines.

Now because of how Thingiverse parses text input I would suggest you simply attach your config.h as a file so it can be read!

Good luck!

Marlin 1.1.x or 2.x on Anet A8 Guide
How To Wire a RAMPS 1.x

I was on the verge of crashing before work, and I didn’t see how to just save the configuration.h file, sorry y’all . But I thought the offsets are correct, but at this stage I haven’t the foggiest clue if any of its right or not

Well, tell me about your printer, what's stock and what's not?

You can check out this page on home offsets but you also need to have your buiuld area configured correctly. If you have it set to 100x100 it's not going to move to all the edges, does it? Marlin simply divides the X and Y in half to find center, this is also related to using the example configs, they have this already set.

Ok, so if the bike area is 220x220, what would the offsets be for the Anet a8? I really wish I’d made a damn backup of my old configurations

It separated cleanly from the support material. Beautiful work!