Please see the attached photos.
I have a DC motor that will not start when power is applied.
However with power still applied if I spin the motor with my fingers it will start running just fine.
All of this is at no load, and tested with a fresh 9V battery.
This is a new motor, and the brushes have only a minor curve to them. If I could get the motor to start I would invest the time to run the motor to get the brushes “broken in”
My meter measures 1.5 -2.0 ohms between the pos and neg for all rotor positions. I do notice a cogging when moving the rotor with no power applied.
I can’t figure out why this motor won’t start. Again this is all with no load, and I am just holding the motor. Its gets warm but not hot. I also only run the motor for maybe 10 seconds just to be sure its not slowing down.
Any troubleshooting tips or suggestions are appreciated.