News for hackers. Stuff that matters.

A comment on Show HN: Robot that copies artist's exact strokes to replicate a painting in 3D. Parent comment

Re:Show HN: Robot that copies artist's exact strokes to repl... by 542458 on Monday August 24, 2015 @07:34PM (#10113478)
You can get good 1/32 drivers like the DRV8825 (https://www.pololu.com/product/2133) for not too much - I'm pretty confident they'll be able to do what you need (You can buy knockoffs for even cheaper). Even 1/16 is pretty dang smooth.

It also might be that you're supplying too much or too little current to the motors - both will result in jerkiness and noise. If your current drivers are current limiting, I'd look into tuning that. If they aren't, the ones I linked are.

[ Parent | on HN ]
Re:Show HN: Robot that copies artist's exact strokes to repl... by chrischen on Monday August 24, 2015 @11:16PM (#10114404)
They are current limiting and can go down to 1/16 step I believe. However, even at the current settings the motors can't keep up if the artist whips their arm from one side to the other.
[ Parent | on HN ]