Github doesn't pitch it as well as the videos he's uploaded on Youtube. They add dual encoders to cheap commodity hobby servos to allow for excellent backlash compensation. Result is movement accurate and consistent enough to thread a mechanical pencil lead in and out of the tip of a pencil. Project has been active for 5 years, with significant improvements in the last year.

https://www.youtube.com/watch?v=SioCwvR_PYY

https://www.youtube.com/watch?v=_4mrb2T706s

https://www.youtube.com/watch?v=Ctb4s6fqnqo

This is great, but a similar thread [1] was so recent that I think we should wait until the current post is no longer a follow-up (about which see https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...)

Can you email hn@ycombinator.com so I can arrange to send you a repost invite for this after some time?

[1] Low Cost Robot Arm - https://news.ycombinator.com/item?id=39902205 - April 2024 (245 comments)