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Micro Robot arm (9g Micro Servo) see video

by bentommye, published

Micro Robot arm (9g Micro Servo) see video by bentommye Nov 18, 2012

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Description

A very small and inexpensive robot. 4 axes plus gripper. Build on 9g micro servo.

The robot can be controlled by remote control, Arduino, etc

I see that there are different diameter on the shaft from the servo. If the gear does not fit I'll fix a new one. Just send me the diameters of the shaft.

See it in action:

youtube.com/watch?v=_fGNWsP41S0

youtube.com/watch?v=eWSpKL0VOp8

youtube.com/watch?v=Qj7jYwfpEMc

youtube.com/watch?v=Ca4PmYkpcgg

Programming:
youtube.com/watch?v=7hBvyaEWg5I

Recent Comments

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I am new to arduino. do u know why my lcd 1602 won't start. but the led light behind the lcd is on

Would you please post your version of LiquidCrystal_I2C.h? Because I keep getting error

I re-wrote your design in OpenScad: http://www.thingiverse.com/thi... (and made some changes to make it easier to print).

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Instructions

If you want servo that lift arm is replaced with a stronger MG955 servo see:
thingiverse.com/thing:38875

Latest uppdate
- Arm w spring.stl and Sving v2.stl
Are to adding a rubber band and spring for increasing handle wight. Not tested yet.

- Grippper v5 with new "spring" for bether grip on the gear.
- Gear v5 is smaller for stronger gripp and fit gripper v5
- ArmFront_v3 (design for the gripper)
- Gripper (x2)
- GripperGear - mounting on the gripperservo

You will need:
- 5 micro servo 9g and it's accessories
- 4 very small screws (for the 4 armed servo horn)
- 3D printer (made for uPrint but it should work on other)
- Some things to controll det robot - i use an Arduino and a servoshield.

3D print:
Enlarge 10 times before printing. And put the two measurement metric not inches.

1 - Fot
1 - Sving
2 - Arm
1 - ArmFront
2 - Gripper
1 - GripperGear

Instuctions
Servo inserted in custom holes.
Fit the two arms together.
Adjust the servo so that it is in the middle.
Install the servo horn with one arm.
Servo on the fot platform should have the servo horn with 4 arms for stability.

I welcome suggestions for improvements.

Robot program for Arduino:
bentommye.blogspot.no/2012/12/download-arduino-kontrollert-robot-arm.html

Comments

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skylinekwy on Dec 8, 2013 said:

I am new to arduino. do u know why my lcd 1602 won't start. but the led light behind the lcd is on

skylinekwy on Dec 6, 2013 said:

Would you please post your version of LiquidCrystal_I2C.h? Because I keep getting error

holgero on Mar 23, 2013 said:

I re-wrote your design in OpenScad: http://www.thingiverse.com/thi... (and made some changes to make it easier to print).

hyla on Jan 20, 2013 said:

Hi,

thanks for lending a hand :)

Two suggestions:
- a bigger foot: http://www.thingiverse.com/thi...

- make a turnable wrist

Bye,
hyla

bentommye on Jan 21, 2013 said:

Suggestions for a turnable wrist.

Remove the gripper. Mount a 4 cross horn on the gripper servo. Print an extra foot.stl if nessesary. Then mount the foot on the horn.

The old gripperservo is now the writst servo.

Add a new servo to the new foot and use that for the gripper.

Maybe it's an ide to use an extra strong servo for the lifting arm. Because of the extra weight. See: http://www.thingiverse.com/thi...

bentommye on Jan 21, 2013 said:

I like the foot. A turntable is maybe too heavy? But I can trye.

AMS3000 on Nov 29, 2012 said:

When I load the files into Repetier or Pront3rface, they appear very very tiny… what units did you use? I just got my servos, and I can't wait to start!

bentommye on Nov 30, 2012 said:

I have to scale it 10 times before I print it. 

I do not know why but various programs make different sizes of STL files. From some programs do I enlarge 1000 times and from any I must magnify 10 times.

jt123 on Nov 29, 2012 said:

try scaling by 10x. at least in replicatorG it seems like 10x is the correct ratio. the base piece appears to fit with the 9g servo with 10x scaling. for a 7g servo its around 9.4x

bifi5590 on Nov 29, 2012 said:

I had the same problem. I imported the files in Google Sketchup with Jim Foltz stl importer (which makes stl files super huge by the way) and scaled them down to fit the servos (a factor of 0.4 in my case) and then exported them back to stl. That worked for me with Slic3r.

lars0 on Nov 27, 2012 said:

What Shield are you using on the Arduino?

bentommye on Nov 28, 2012 said:

"Arduino MEGA Sensor Shield V1.0 Sensor Expansion Board" and "Arduino Sensor Shield V5.0 Sensor Expansion Board" depending on the Arduino I use.

jt123 on Nov 22, 2012 said:

i've started making this on a MakerBot Replicator for a dynam 7g servo. the 7g servo is slightly smaller than the 9g one, but has very similar dimensions. it seems like scaling it by 10x and then .94 seem to give a pretty good fit. will update as i proceed :)

bentommye on Nov 23, 2012 said:

Cool. Do you have picture or videoto share?

Let me know hivs you need any help. 

bifi5590 on Nov 21, 2012 said:

More work for my Printer :) Thanks!

bentommye on Nov 21, 2012 said:

Which printer do you use?

buZztiaan on Nov 20, 2012 said:

could you upload a video?

bentommye on Nov 21, 2012 said:

I'll try

AMS3000 on Nov 19, 2012 said:

Awesome project! I really like how your design for using the servo horns to attach to the parts. I just ordered up 5 servos :)

Ssmigielski on Nov 20, 2012 said:

 agreed.  I will be copying that method for my 3-servo class arm that I'm working on, it's far more efficient than what I was doing.

buZztiaan on Nov 19, 2012 said:

So cheap, http://dx.com/p/mystery-9g-min...
~4 usd when you buy one, ~3 usd when you buy 5!

bentommye on Nov 19, 2012 said:

Inexpensive robot :-)

bentommye on Nov 18, 2012 said:

For Arduino conroller - I recommend that power is connected to the servoshield rather to the Arduino.

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