RailPro > RailPro Specific Help & Discussion
Sudden motor overload errors
KiloWhiskey:
I removed the module, and tested it with a test motor and it operated fine. The loco, when I removed the
8pin connector, reinstalled the DC pins and put a 9v battery to it and the loco motor started running. I removed the 8pin board, and did a hard wire install, and again it wont run... lighting and sound work fine.
Alan:
What is the motor full load current setting?
KiloWhiskey:
When I originally put it on line, it auto set at 180... I attempted to retest but it went straight to overload .
G8B4Life:
--- Quote from: KiloWhiskey on September 23, 2020, 06:12:27 PM ---I removed the module, and tested it with a test motor and it operated fine.
The loco, when I removed the 8pin connector, reinstalled the DC pins and put a 9v battery to it and the loco motor started running.
--- End quote ---
This would be expected. A 9v battery is only good for testing if the motor actually works by turning over, not if the motor is consuming more current than an LM can safely provide. A battery is not a protected device like the LM is so the motor will just consume as much as it can from it which is limited by the battery make up (eg, the make up of a 9v battery limits it output to about 1A max which is all the motor will get, even if it's trying to consume 2A).
I still suspect that the motor has/is developing a fault (possibly low resistance?). That a test motor worked fine with the LM supports that. You need to find out how much current the motor is trying to draw. Do you have a multi-meter?
- Tim
KiloWhiskey:
If I measured this correctly the suspect motor was about 25 ohms on meter autoset, and a known working kato motor read 308 ohms...
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