I have a flood safe laundry solenoid that is activated by a ~5v dc motor. When I received it I tested it and one of the solenoids wasn't working. I did watch it work once but it failed to work at least ten more times that I tested it.
I swapped the cable leads and used my fluke to test voltage on the motors when using the controller to manually open and close the valve. I manually activated the 3/4" ball valve that wasn't working. Eventually I spun the shaft of the dc motor manually and then tested it and now it is working again. Tested it ten more times and all were succcessful.
Initially I read this thread:
https://forum.allaboutcircuits.com/threads/dc-brush-motor-failure.75703/
and it seemed to indicate that maybe one of the phases or windings could have gone open circuit but it predicts a roughly 1 in 3 chance of the motor spinning and stopping in a stop. Testing 10 times should have had a really good chance of that being the case.
How many times should I test to have confidence, maybe the shaft was sticky? Really these motors only activate if there is a leak and that shouldn't happen very often.
The gear has ten teeth and it is approximately 3cm in depth from the surface of the gear to the back of the motor. How hard is it to find a replacement for something like this?
I swapped the cable leads and used my fluke to test voltage on the motors when using the controller to manually open and close the valve. I manually activated the 3/4" ball valve that wasn't working. Eventually I spun the shaft of the dc motor manually and then tested it and now it is working again. Tested it ten more times and all were succcessful.
Initially I read this thread:
https://forum.allaboutcircuits.com/threads/dc-brush-motor-failure.75703/
and it seemed to indicate that maybe one of the phases or windings could have gone open circuit but it predicts a roughly 1 in 3 chance of the motor spinning and stopping in a stop. Testing 10 times should have had a really good chance of that being the case.
How many times should I test to have confidence, maybe the shaft was sticky? Really these motors only activate if there is a leak and that shouldn't happen very often.
The gear has ten teeth and it is approximately 3cm in depth from the surface of the gear to the back of the motor. How hard is it to find a replacement for something like this?
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