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Chris Annin
Chris Annin
@chris-annin
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Joined: Jul 8, 2025
Last seen: Sep 13, 2025
Topics: 6 / Replies: 529
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RE: Collision or motor error

Here is some info on the encoder wire colors. also take note of the startup section in the AR4 manual in regard to changing the encoder phase by rever...

1 month ago
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RE: AR3 Strange behavior, J2 collapsing.

I'm a little confused by this issue. Is there any chance you can email me some video of the issue happening so I can see what its doing when J2 moves ...

1 month ago
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RE: J4 is the only joint that moves (AR3)

What version DM542T drives do you have for the other joints? The newer V4 drivers have a small slide switch for 5v input or 24v input. If you do have ...

1 month ago
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RE: Strange behaviour of axis 4 and missing 90 degrees of axis 5

I believe the rotation of axis 4 you are seeing is wrist singularity and that is normal for a 6 axis robot. It happens when axis 4 and 6 are aligned a...

1 month ago
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RE: AR4_teensy41_CUI_enc_sketch (BETA) calibration issue

@zuolin1977 It looks like I had 2 different keystone jacks that were numbered differently that goofed me up. I fixed the wiring on page 221 and publis...

1 month ago
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RE: AR4_teensy41_CUI_enc_sketch (BETA) calibration issue

@zuolin1977 Got it, someone else just pointed that out as well. I will figure out which part of the schematic I messed up and get it fixed tonight. Th...

1 month ago
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RE: AR4_teensy41_CUI_enc_sketch (BETA) calibration issue

@zuolin1977 Thank you for the feedback on that. If you disable that encoder for J1 in the software does it still give you that error? I suspect a wiri...

1 month ago
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RE: AR4_teensy41_CUI_enc_sketch (BETA) calibration issue

@alaeddine-brahem Is it driving to the limit switches and then slightly back off of them? If the motion is not as expected can you send me a quick vid...

1 month ago
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RE: AR4_teensy41_CUI_enc_sketch (BETA) calibration issue

Were all your limit switches and joint calibrations working with the AR3 software? I will start looking into this. If anyone else is having this iss...

1 month ago
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RE: Encoder noise

The external power supply on the AR3 is just to power the 8 channel relay board. I wanted the controller to have the ability to control multiple relay...

1 month ago
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RE: Modifying the AR4 program to fit a differential wrist

Hello, Im happy to see people modify the program and share it with everyone, I only ask people not resell for profit. You dont need to use encoders. t...

1 month ago
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RE: sourcing amazon parts

Stepper online does offer some items on Amazon, I have asked them about offering the AR3 kit on Amazon and I will report back when I know more. As far...

1 month ago
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RE: J3 Belt Upgrade Kit (Store Link?)

Hi John, I took the belt kits out of the store as it was causing a lot of confusion and people thought they needed to buy a robot kit and a belt upgra...

1 month ago
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RE: #6 x 0.375 thread form screw

I think the #6 is going to be between a 3mm & 4mm screw. I would try a 3mm x 8mm thread forming screw. Unfortunately the specialty metric screws a...

1 month ago
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1 month ago
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