RailPro > RailPro Specific Help & Discussion

Motor function not working, all sounds OK

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Alan:

--- Quote from: MtRR75 on December 06, 2021, 12:39:24 PM ---In my case, the motor would run if attached to a 9-volt battery.  It appears that my short is buried somwhere inside the loco.

--- End quote ---

If the motor draws too much current for whatever reason, the LM motor drive circuit will shutdown whereas a 9V battery would not. The battery will continue supplying current until it is dead even if it is doing so through a direct short. That might explain why your motor works on a battery but not on an LM.

MtRR75:
Good to know.  Thanks, Alan.

Tom:
faithie999,

What is the easiest way to check the motor?  I did not  do the LM install.

Thanks,

GMM6809:
I would use a multimeter and check for resistance on each contact of the motor.

Boomer68:
I had connected the LM3S using the 8 pin to 9 pin wiring.  I disconnected the 8 pin and replaced the original Proto 2000 PC board and the motor runs.  Next step?

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