Comment by easygenes | Hacker News Reader

Comment by easygenes | Hacker News Reader

Anyone know how the accuracy of this compares to the similar-cost adamb314/ServoProject arm? [1] It utilizes a servo mod adding dual encoders to compensate for backlash and achieves accuracy of +/- 0.05mm (enough to thread a mechanical pencil lead in and out of the tip of a pencil). [2] He's been working on the project for 5 years, with significant improvements still in the last year. [3][4]

  [1]: https://github.com/adamb314/ServoProject
  [2]: https://www.youtube.com/watch?v=SioCwvR_PYY
  [3]: https://www.youtube.com/watch?v=_4mrb2T706s
  [4]: https://www.youtube.com/watch?v=Ctb4s6fqnqo

it should be similar given similar construction; one of the reasons dynamixels tend to be pricey is the dual inboard encoder setup.

if price is a factor then a servo+encoders setup will always be cheaper; there are some dirt cheap encoders out there for the creative hacker. dynamixels offer a crappy value compared to DIY solutions, they're just easy to use off-the-shelf and have nice features that aid construction.. but hardly anything game changing.

> but hardly anything game changing.

Speak for yourself! When I worked on liquid handlers a decade ago the fully integrated servos were at least ten times as expensive as they are now.

Every time I step away for a few years and jump back in, there seems to be at least a half dozen game changing pieces of hardware on the market.

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