gripper servo

Lynxmotion Robot Arms
1

Hi all,

I have a Robotic class and we work on 3 small groups using lynx5.

we did a simple exercise to move the arm to a position, get a small object and return back.

All of us did it well, but SUDDENLY when we want to do another one, we find that the gripper servo (HS-81 servo ) became very hot and didn’t work at all( for all of us).

NOW we don’t know who to fix this problem!!!

Thanks.

2

Hi… I have a lynx 6 arm with the same servo…
I’m not in a class, I just own one for fun… but currently I don’t have that servo installed… I checked the connections from the SCC32 board, all the way to taking apart the servo, and testing the potentiometer inside… unto my supprise, everything checked out…
I also tested the board using the wrist servo… and it works… so I think you have to do what I did and order a new servo.
but check all those things first just to be sure :slight_smile:
Good luck

oh… one more thing… in the SCC32 control in the RIOS software… set the limitations of the gripper motor (possibly just the new one) so the gripper is slightly open. then, one increment at a time, slowly increase the minimum setting so the gripper just barely touches itself, and doesn’t put any torqe on the servo. also, set the minimum open range to the griper just shy of being open all the way, so again… there is no torqe on the servo.
that should solve our problem compleetly. aside from holding an object for an extended amount of time.

3

you might have over heated it and made a boo boo, maybe burned it out :open_mouth:

4

The micro servo can be damaged by supplying it with more than 6vdc, or tightening the gripper too tightly on an object. If it was damaged, at least it’s not expensive. :slight_smile:

5

Killerfishmonkey, Chunga and Robot Dude, thank you all for your replies.

Killerfishmonkey do you mean that we should change the limitation before the first use!!!
How can I know that the servo damaged or is still work? :question: :question: :question:

6

well, you can always test it to see if it works, but dont give it more than 6 volts or do too much with it

7

Yes… You must set its limitations immediatly, so it doesn’t get dammaged to quickly.