THE ANNIN ROBOTICS FORUM HAS MOVED TO A NEW COMMUNITY. 👉
Yifei Cheng
Yifei Cheng
@ycheng517
Eminent Member
Joined: Jul 8, 2025
Last seen: Nov 22, 2025
Topics: 6 / Replies: 12
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RE: Is my J2 encoder busted?

@angus-muffatti I directly wired the encoder cables to the teensy board, bypassing the mess of wires and connectors in between for the standard wirin...

10 months ago
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RE: Is my J2 encoder busted?

the encoder was broken and after getting a replacement, things are working again. I think I applied too much pressure to it while assembling the robot

10 months ago
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Replies: 5
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RE: HK1612 bearing stuck on J5 Bearing Post

@chris-annin I got both parts from the kit. I was able to remove the bearing from the post by adding WD-40 between the two parts and then rotating whi...

10 months ago
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Replies: 3
Views: 467
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RE: ROS 2 Driver for AR4 Now Available

@dipin don't use the main branch on humble, it won't work even if you get past this build problem. Investigate and fix your limit switches like what A...

11 months ago
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RE: ROS 2 Driver for AR4 Now Available

@duanemclemore It should work with moderate effort. You just need to figure out the differences between AR3 and AR4, and update configs in both the Te...

11 months ago
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RE: ROS 2 Driver for AR4 Now Available

@evan-wassmann hey I'm not sure why that's not being updated but another way of tackling the problem is to reduce the max_velocity of those joints in ...

11 months ago
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RE: ROS 2 Driver for AR4 Now Available

For posterity, the calibration routine has been updated and now the validation routine should work no matter the camera angle

11 months ago
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RE: ROS 2 Driver for AR4 Now Available

@philippe see: for calibration accuracy tips

11 months ago
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RE: ROS 2 Driver for AR4 Now Available

Update: AR4 servo gripper control has been added!

11 months ago
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RE: ROS 2 Driver for AR4 Now Available

@Jacob it would be great if you can test it!

11 months ago
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RE: ROS 2 Driver for AR4 Now Available

Yes it should work on the raspberry pi, you'll have to install Ubuntu for Raspberry Pi. I'm not supporting the nano/gripper yet but will be working on...

11 months ago
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