JG Aurora Infrared sensor upgrade
Version 1.3 12th Feb 2018
15th Feb 2018 - Updated to V2 sensor holder. Now includes LED mount and slotted holes
12th Feb 2018 - Updated firmware (uploaded the wrong version)
22nd Jan 2018 - Updated firmware to the latest release, updated to 25 point bed level
10th Jan 2018 - Updated firmware to the latest release
MAKE SURE YOU DOUBLE CHECK YOUR CONNECTIONS
POSITIVE to POSITIVE
NEGATIVE to NEGATIVE
SIGNAL to SIGNAL
The connections are written on the boards.. so it's easy to check.
Autobed level addition to the JG Aurora A5 3D printer.
Items you will require
Infrared sensor - https://miscsolutions.wordpress.com/mini-height-sensor-board/
3 wire servo extension lead (2 x 1m in length)
To do this modification you will need to update the main board's firmware. You will need to update using the Arduino IDE software.
There are plenty of youtube videos showing you how to do this, just search for update marlin via arduino ide.
You will need to open your machine up and feed the 3 wire connector around the machine. The sensor uses the Z minimum endstop connector, so just unplug the current one.
The current z endstop needs to be removed. Just unscrew it from the side frame and hide it below. You can always go back then if needed.
I've already configured the firmware to use this sensor, so you will only need to flash it. I have enabled the eeprom on the board, so you can save
bed levels.. but I would level at the start of every print just to be safe.
To level, you will need to add some gcode lines to your start gcode script. There is normally a tab / section in your software.. the lines you need to add are,
Add these AFTER the G28 (Home) command.
M851 Z-1.0 ; Z Offset
M500 ; Save to Eeprom
G28 ; Home
G29 ; Level bed
The Z offset can be set above. Z-1.0 = 1mm.. so if you want to lower the head then you would do..
M851 Z-1.2 ; Z Offset
This would then be 0.2mm closer than before.
You don't need to change the TFT firmware, you won't get any benefit from it as it doesn't support Z offset setting
The cover, just slides down onto the mount :-) it didn't look very nice without it.