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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: Question about J1 tapered roller bearings

@danielgigliotti99-dggmail-com I would use PETG but it should work fine - its not that much pressure to preload.

1 day ago
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RE: Question about J1 tapered roller bearings

@danielgigliotti99-dggmail-com no the screws place direct pressure on the bearing center housing and preload the bearings. Im attaching a section vie...

1 day ago
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RE: Question about J1 tapered roller bearings

Hello, In the build manual page 67 shows tightening the tension screws that apply bearing preload. Please let me know if you have any questions on t...

2 days ago
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RE: Camera Mount on AR4

Hello,If you are referring to using the camera for vision-based part finding or robot picking, then the camera should be mounted in a fixed position a...

2 weeks ago
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Replies: 0
Views: 72
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RE: Using AR4 with nvidia GR00T-N1-2B

Sorry for the late reply on this, it’s possible to use NVIDIA’s GR00T-N1-2B model with the AR4 robot, but it requires an integration layer between GR0...

1 month ago
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RE: New Software Version 6.0

@steve-marsh How long is it taking your computer? It does take a few seconds to coordinate with the teensy board and load the current positions and co...

1 month ago
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RE: New Software Version 6.0

@gilles-sauvagnat Thank you!

1 month ago
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Replies: 6
Views: 226
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RE: Did I fry my encoders?

Hi there - thanks for the detailed post and for the kind words! It’s great to hear you're diving into the AR4 build and already working through some o...

1 month ago
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RE: Vertical Movement Stability with Laser Crosshair on End Effector

Sorry for the late reply on this. Could you try running the latest software version 6.0 and then report back? I found some issues with the incremental...

1 month ago
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RE: Using a PC to control the AR4 robot in a project

The AR4 robot does require a continuous connection to the PC running the AR4 software while executing motion programs—similar to how MACH3 operates. T...

1 month ago
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RE: I Lost the J5 POM Nut

I contacted Stepperonline and they do sell the POM nut separately. They asked that you contact them through their sales email and they can set you up.

1 month ago
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RE: How does the teensy drive the motors?

The drivers are capable of 3.3v input. Stepperonline was supposed to update the specs but that hasn't been done yet.

1 month ago
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RE: Help Needed – Teensy Hangs and Fails During Welding on AR4 Robot (Possible EMI Issue)

Hello, I haven't tested myself but I have had people recommend using a USB isolator such as ADuM3160. You might also look at an industrial shielded US...

1 month ago
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