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Old 08-07-2006, 09:11 PM   #1
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As I am breaking my motor in (19Turn) at 2 volts and 5.40 amps, then as I increase it to 7 volts and 8.00 amps, my motor starts to vibrate and numbers start to jump up and down, what does the mean

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Old 08-07-2006, 09:28 PM   #2
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Your armature is not perfectly balanced (not very fixable unless you are willing to drill some material away) and causing the brushes to bounce; this causes arching, and funky amp draw numbers. Generally, the motor will run fine in your car, but not nearly as efficient and powerful as a motor that is perfectly balanced.
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Old 08-07-2006, 11:39 PM   #3
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might want to try skiming the com too , as well as what was mentioned ,checking the balance of the arm ... I had a 19t do the same thing , cut the com and did notice the com being out of round ....motor now runs fine ....
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Old 08-07-2006, 11:50 PM   #4
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Why would you want to break in your motor at 7v? Stick with 1-2v.
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