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Chris Annin
Chris Annin
@chris-annin
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Joined: Jul 8, 2025
Last seen: Oct 5, 2025
Topics: 6 / Replies: 532
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RE: I do not know how to test encoders...

Hello, it does sound like you have a grounding issue. Please note that in the earliest version of the manual I had the teensy, arduino 5v supply and t...

2 months ago
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RE: Files needed for CNC

Ive never machined the parts myself but I believe the step files are typically used for import into CNC machining but if you have solidworks 2019 you ...

2 months ago
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RE: How does one format a serial command for the AR3?

Hello, if you look on line 4493 you will find commandCalc where after the kinematics are calculated it send the arduino the steps for each motor ...

2 months ago
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RE: Bit size for counter-sinking?

I use a standard 82° countersink similar to this one:  Bit-size-for-counter-sinking.avif

2 months ago
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RE: Pneumatic Gripper

Builders of the AR2 or AR3 robot are free to use any gripper of their choosing. Initially I did not include the SMC gripper I was using in the BOM but...

2 months ago
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RE: Aluminium tarnishing

Hello, On the robots I have built I have just polished the pieces using aluminum polish and have had good luck with them not tarnishing but I dont liv...

2 months ago
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RE: Hole size for J1 turret

The chart im looking at now shows clearance hole for an M6 screw to be 6.2mm for a close fit and 6.4 for a normal fit. Its possible solidworks sized t...

2 months ago
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RE: J2 arm rubbing on spindle

Do you mean the J2 arm is rubbing on the housing? Do you have any pics you can send me so I can see what is going on?

2 months ago
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RE: Can AR3 be hung upside down?

That shouldnt be a problem. Ive had several people invert the AR2 and AR3 without any issues.

2 months ago
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RE: J1 press fit and dimensions

Hello, The J1 housing should be a very slight press fit, Ive asked my vendor to try and keep the tolerance closer to a light press as many people do n...

2 months ago
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RE: AR4?

Hello, currently the AR3 is the main platform for the foreseeable future. I'm currently researching a number of things including software improvements...

2 months ago
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RE: AR3 7th axis

I will be working on that but I don't have a timeline yet on a closed loop 7th axis.

2 months ago
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RE: Adding absolute position feedback using TLE5012 encoder

I think the only motor that might have clearance issue would be the J6 motor. Looking forward to seeing your progress.

2 months ago
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RE: Encoder AMT102-V Out of Stock

Ive had good luck with Arrow they show 250 in stock right now, hopefully the stock they list is accurate.

2 months ago
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RE: Best files for cnc dimensions?

Yes all the drill diameters are correct in the CAD files and if you need any 2D dimensions just let me know.

2 months ago
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