When we test our drivetrain it rocks the table. We have reduced what we believe the issue to be to a faulty Falcon 500 motor. After removing the Falcon 500 from our drivetrain we ran it again, ensuring it was the one responsible for the thumping. We had already loctite-ed the shaft screws to prevent the failure mode and when opened again to check if this was the problem, all screws were there and the motor looked normal. The code for motor of issue is the same as all the others and all motors are up to date on their version and firmware. Any suggestions on what the problem could be? I’m open to anything, we are using all of the Falcon 500’s that we own and do not want to change drivetrain motors entirely if at all possible.
Can you be a little bit more descriptive of the behavior you’re seeing from the robot? A video would be best!
Are you describing wheel scrub? Or are you describing vibration of the robot even when the wheels are not on the ground?
Ill take a video next time I have the chance! The thumping occurs when the wheels are on the ground, off the ground, and when the motor is removed from the drivetrain system and just held in the air. The thump is irregular, we get up to speed and it occasionally just jerks, like it is immediately dropping speed and then back up to speed instantly but very aggressively.
You may also want to make sure the set screw in the side port for the pneumatic fitting isn’t threaded in too far, assuming it’s in place. If you tighten it in too far, it is possible for it to prevent the motor from spinning at all.
When you hold the motor up and shake it around, do you hear any rattle noise?
2 Likes
We have ran the motor without the casing and the same problem occurs and when we shake it we hear nothing.
Did you lose concentricity when you added loctite to the shaft screws? This could happen if you removed the shaft entirely instead of replacing one screw at a time. But it shouldn’t cause the motor to vibrate when hand held that badly…
You could try running the motor with the shaft removed, to check if that’s the issue
Do you mean the shaft could be at an angle? When running at high speed without a case it looks like the shaft is fine, I don’t see any wobble in the shaft and I too don’t think it would cause that kind of violent shaking but I can check with the person that did the loctiting.
Check that as well as making sure they didn’t tighten any of the other screws on the motor. Grub screws on the top or sides especially.
Ill try that today, thanks!
If there’s a loose connection on one of the motor phases that could theoretically make the motor “jump”. Check that all three wires have good connections
1 Like
This topic was automatically closed 365 days after the last reply. New replies are no longer allowed.