We are having an issue with some of our claws. The gears seem to “come out” and are not interlocking like they should. As such, when using the motor to open and close the claw, it is not working as intended. I tried disassembling the Claw to see how it works but I am not getting anywhere. Has anyone had any similar issues? Are there instructions for building the “claw” available anywhere, so that I could potentially fix the issue?
I have continued to try to diagnose my issue. The gears feel stiff and the teeth come out. As I was trying to figure out what’s going on, I was wondering if my screws were too tight. As I disassembled, what I think are tiny spacers fell out (pictures 1 and 2). So I am wondering, do there need to be spacers in the spot I’ve highlighted in the 3rd picture?
I appreciate all the advice I have received so far.
These look more like the washers that come from underneath the screws where the elastic bands wrap round.
If the gears a skipping, it sounds like there is something more fundamental that is wrong. A video showing the issue would possibly help to diagnose the issue.
If the gears have that much slop that they can seperate from each other, it seems like the inserts are missing from the square holes in the red gears and so they are floating freely on the screws. There looks like a lot of friction there. With no motor on, it should just move easily.
I want to take a moment to mark this as a solution, and thank everyone for their input.
The inserts that go into the squares of the red pieces, which keep the gears well-spaced and interlocking, are what did the trick. For reference, the part is “0.375” OD x 0.875" Nylon Spacer", part # 276-5918-001.
When I inherited this robotics classroom, I think some of my claw kits became disassembled and the spacers were removed. This forum has been a life-saver, because I was worried there was something permanently wrong with them. Now we don’t have to go and purchase more.