Left Motor test fails

Troubleshooting
41

Okay, thank you!

43

im not sure if this is exactly the issue being discussed but i have a left motor issue.

my left motor fails test 1 out of 2 100% of the time. i have replaced

  • the left motor
  • the left motor wire
  • the shield and arduino

at this point i do not understand what it could possibly be. it seems to operate correctly when cutting or when moving the sled around on the board manually but i have never gotten it to pass all the tests.

44

It’s a puzzle, but it sounds like you’ve got all the right parts on hand. Here are some questions:

Does the failing motor run at full speed during the portion of the test that fails, and turn in the direction opposite during the portion that passes? If yes, the encoder on the motor or the Arduino itself might be where to look, or electrical interference if that motor cable is routed near a power cable.

Does it still fail ‘tests motors’ if you remove the chains?

If you swap the MP1 and MP3 cables on the shield, does the right motor fail instead of the left? If yes, the motor or the cable are suspect. If no, the shield is suspect.

Is the “Settings/Advanced/PWM frequency for motor control” set to “490Hz”? The TLE5206 boards lose torque at higher settings. The stock Maslow boards v1.3 aren’t affected that way.

45

i dont know why or how but i changed computers. i got one just to run mazlow and after switching over to the other computer that issue never happend again. all the tests pass every time. is there any reason this would happen?

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46

I can’t think of a way that a computer could directly cause the problem with the left motor, but something in the process of changing over might. Did you disconnect the Arduino form the motor cables during the swap? I made a pretty good living in a previous lifetime fixing mysterious problems by doing things like re-seating connectors…

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