SR6 top right arm issue

Help
1

My SR6 top right arm isn’t moving. Because of this, when doing an up down motion, it goes sideways. Is it possible that the servo needs to be replaced? I don’t know what to do to troubleshoot.

2

Is it not moving at all and locked in place or moves a little bit just no power coming from that side? Also, while it’s operating have you tried lifting the arm and is there a point where there is resistance from the servo?

Also, a good first step is making sure all the wire connectors are in place.

3

It’s moving a tiny bit, and I can move it manually and hear the servo spin (I can’t move the other 3 arms manually when it’s plugged in). I removed the cover and checked the cables, everything seems plugged in. Any other ideas? Should I swap the servo with one of the other arm ones and see if it works fine?

4

It’s likely that the servo gear is stripped. Take the arm off and the servo horn to check the gear’s teeth. Might not be that but I’ve dealt with this a bit. I’ve yet to find a way to just buy that part for a servo, which would be wayyy cheaper to repair, just a little messy.

Edit: Also, the servo horn itself may be stripped and not the gear. Check the horn teeth as well. If that’s the problem, the servo horns are cheap to replace.

5

agreed. I’ve had to do these three types of things with the servo arms on osr2:

  1. Tighten screws (ideal)
  2. Tighten / replace horn (the part that attaches directly to the servo)
  3. replace the servo itself because of internal gears are stripped.

I actually keep spare servo’s on hand for #3 because it sucks to be out of business lol.

6

Thanks guys - I took the arm out from the outside and the servo horn wasn’t moving. I’m thinking the internal gears might be stripped; is it worth taking it apart and removing the servo to check anything/tighten anything from the inside?

7

I tried to take a servo a part once and fix it.. not worth it. Just buy a replacement if you think the internals of the servo are bad.

8

Thanks! Servo was bad, I replaced it.

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