Hi all. I'm assuming this is likely some sort of wiring issue but given my lack of experience I wanted to check here first to see if anything was imediatly identifiable. The J2 arm is able to resist force in one directon but completely gives when I try and pull it in the other. To be specific, it seems to be holding when I push the arm in the (-) J2 direction but moves nearly freely when i pull in the (+). I quickly checked the encoder settings which look good so I assume a bad wire connection? I can post a video for further clarification if need be. Thanks for your time!

Hi, I wanted to remove the old J2 motor. However, the set screw got stuck, and I was unable to remove the motor shaft from the housing. I tried a screw remover and drilling into the hole where the set screw lies. It seems like I need to drill deeper because there is still something stuck and blocking the motor from detaching from the housing. Has anyone dealt with this before? Thank you

Firstly, I’m not sure if this kind of post is allowed, so please delete if it’s not. I started this project a few months ago, making slow and steady progress. I made it all the way to wiring up the electronics before moving across the country a few weeks ago. After arriving, I found my robot arm broken in multiple pieces. So, I am looking to stop this build for now. I am selling all of my AR4 components. This includes the full motor kit from StepperOnline, all of the hardware and electronics, the J3 belt and pulley upgrade, a pneumatic gripper, and more. It does not include the 3D printed components since many of them broke in transit. If you are interested in purchasing this, please email me at matas.lauzadis@gmail.com for more details. I am local to Boston MA and able to meet within a few hours of here. Again, I’m sorry if this is not allowed. I just want to give someone else the opportunity to build this arm at a lower cost than buying the entire BOM themselves.