Jittery Motor

[Deke]

One thing we had to do this year is grind off the back of one of the pinion pins that is pressed in, to give it clearance. The pin was interfering with other components, and didn't sound healthy when running. That was a 5:1 gear set, but I would suspect that the same tooling is used to assemble 7:1 gear sets as well.

I would check all the components for other interference locations as well, there are a lot of moving parts that might cause headaches.

Other than the minor pin interference, we are very happy with the performance and flexibility of the gearboxes.

It is likely the planetary. Have you removed the motor and tested it by itself to see how the motor runs outside the gearbox? If you can isolate the problem to the gearbox itself, it becomes a lot simpler to solve.

[DarkRune]

What's the code you are running on it? Something I've noticed with code is that it often oscillates between forward and backwards. You can also try hooking it straight up to a battery and see what happens. You can also check out the talon and maybe switch that out.

[nighterfighter]

Originally Posted by DarkRune

What's the code you are running on it? Something I've noticed with code is that it often oscillates between forward and backwards.

What kind of code are you using that's doing that?

The code really shouldn't cause a motor to oscillate between forward and backwards too often, unless it is a PID loop trying to get to the exact position... (Or if your driver is rocking the robot back and forth.)

[topgun]

Check the dowel pins used to hold the planet gears. Each of our 7:1s had a dowel pin that stuck just slightly out of the backside.