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Old 11-13-2019, 06:00 AM
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Hey guys,
Sid asked me to do a voltage test on the sensor wires of (1) of my Boma motors, we would have a point of reference, to go off of while troubleshooting this motor/controller.

I rigged up a ~5V power supply (3 AAA batteries)
…& connected it to the red & black wires on the sensor plug (to "power" the sensors)

Then, I tested each of the (3) sensor wires (yellow, green & blue) while slowly rotating the motor shaft.

This brushless motor seems to have (18) distinct notches that you can feel when turning the shaft.

Another thing I noticed is that when the MM was switched to the 20V setting I only got a 0.01V reading
...but, when set at the 2,000mV setting I got 007V

So, I put a silver line pointing straight up on the sprocket, for reference, & designated it as #1

Here are the results I got

Yellow wire showed a 007 reading on 1, 2, 3 & 7, 8, 9 & also 13, 14, 15
Green wire showed a 007 reading on 3, 4, 5 & 9, 10, 11 & also 15, 16, 17
Blue wire showed a 007 reading on 5, 6, 7 & 11, 12, 13 & also 17, 18, 1

I did a video to show the testing method & results

Hope it helps
Attached Thumbnails
SAM_1533.jpg   SAM_1532.jpg  

SAM_1535.jpg   SAM_1536.jpg  

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