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Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Robot arm - stepper motor

by Petread Jan 11, 2019
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This thing is beautiful in design, could you please upload the .ipt for part 5 (the hand)? I'd love to remix it and make different adapters for different tools

Hi, I Just uploaded the project files.


Hey of course i will upload the whole project. I have not reworked yet so i am happy that you would like to remix it

What is the maximum weight this arm can support? Looking to modify to hold an iPad Pro

Hello, this is not possible. therefore you have to go with much stronger steppers and drivers. With my first drivers (Grbl cnc board) the arm could not even hold itself.


is the stepper friction fit?

Hi, For the first joint i have screwed in a worm screw. but for the others its ok. (the limit is the torque of the steppers which is in my opinion quite low =(

For increasing torque i designed a very compact planetary gearbox which can be mounted directly on the stepper motor. (but it is not in the final stage yet). When it is finalized i could upload it here.

lovely, thanks

That would be great!...