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Chris Annin
Chris Annin
@chris-annin
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Joined: Jul 8, 2025
Last seen: Sep 15, 2025
Topics: 6 / Replies: 529
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RE: Motor shaft keys

I have been using a small pair of vise grips, they need to have a clean (not rounded or dinged) front edge. I then gripped the key with the nose of th...

2 months ago
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RE: if on jump... dont work

Thank you for the input, Ill look into why it wasn't working with ser.readline. Chris

2 months ago
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RE: ___j3

the motor should be fairly warm but not too hot to touch. is it making a groaning noise and not moving very far? if the drive doesn't sound consistent...

2 months ago
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RE: ___j3

what are your dip switch settings for microstepping? is the arm consistently moving a short amount? curious if one of the calibrations settings got go...

2 months ago
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RE: Acceleration of AR2

I currently do not have absolute velocity calculated, the robot speeds and accelerations are based on percentage of max capable. This is something tha...

2 months ago
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RE: J1 & J5 No Action and Other Issues

Im copying into this thread the response I sent to your email so others may follow if they have similar issues. 1. Nothing is moving when i hi...

2 months ago
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RE: J2 and J5 motor issues

when I have experienced similar issues I found bad terminal connection on the driver dir wire. let me know if you are able to sort out the issue.

2 months ago
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RE: This is an amazing project.looking forward to buy the AR3

Thank you. Im glad you like the project. Im still quite a way off on a larger size robot and will keep everyone posted on progress. Right now Im worki...

2 months ago
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RE: Doubt about drivers

Yes I believe you could. when I initially started designing this robot I had started with some larger motors and the DM series drivers were just comin...

2 months ago
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RE: Material

Hello, yes it is 6061 aluminum alloy.

2 months ago
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RE: I Cant get the robot to do anything, keep getting error message 'ser' not defined. yes I am very new to this

Hello, this message means you do not have a serial connection to your arduino. Open the Arduino IDE program and check under tools/port and see what po...

2 months ago
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RE: Custom Robotic Welding Arm

I am not sure what electrical interference issues you may have, but I would be concerned with that as well. I know that the solenoid valve for the pne...

2 months ago
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RE: Diferences with Nominal Sized and Resized for Shrink

Im not certain on that. both versions were created from modified version of the same .sldprt file and converted to .step using solidworks 2016. Im not...

2 months ago
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RE: Goals

You can use insert replace to manually enter coordinates, or you can use the stored position registers to call positions, I may not completely underst...

2 months ago
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RE: Extending J2 Arm

Hi Paul. I think you will be just fine to execute the plan you have lined out. I have never inverted the AR2 but I dont see why it would be an issue. ...

2 months ago
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