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Intermittent brushless motor issue

Intermittent brushless motor issue

Old 11-11-2013, 10:28 AM
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Default Intermittent brushless motor issue

Specs:
Motor - Reedy Sonic Mach 1 7.5t
ESC - Mamba Max Pro

This weekend while racing I was having some intermittent issues during the main event with my T4.2. The truck has been running great with no issues until this main. During the main I was racing for position and upon landing a jump the truck shut off, no steering or throttle. The truck was turned on and off and only the steering returned. After the wheels were bumped the throttle control returned.

A couple minutes later while running down the back stretch the rear wheels locked up and the truck came to a stop. After the truck was turned back on the marshall said it sounded like the "motor was stuck." Again the wheels were bumped and truck started responding again.

Any thoughts? The truck rolls freely, no abnormal noises, and no obvious visual defects.
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Old 11-11-2013, 10:31 AM
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Sounds like either the sensor cable or the sensor board in the motor went bad. Try a new cable, and go from there.
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Old 11-11-2013, 12:39 PM
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I had that happen when my tekin 1900 magnets blew off the rotor. Otherwise I agree with the above, motor connection can really cause some weird stuff
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Old 11-11-2013, 01:40 PM
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Pull the sensor wire and try it. If it runs sensorless fine you found your problem. If not possibly either cold solder joint or bec issues.
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Old 11-12-2013, 05:53 AM
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I at one time had a ballistic motor with a bad sensor board talking to a mamba max pro. It would run OK for a bit, then the it would just stop, and a few moments later you would hear the chimes as the ESC would arm again.

It would just reboot every few minutes... replaced the bad sensor board and was good after that.

So, that is a +1 to check the cable and sensor board on your setup.
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Old 12-05-2013, 07:13 AM
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I went ahead a replaced the sensor and wire and I haven't had any additional issues over the past two days of racing. Thanks all for the help!
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Old 12-05-2013, 07:55 AM
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Originally Posted by Duck Hunter 117 View Post
I went ahead a replaced the sensor and wire and I haven't had any additional issues over the past two days of racing. Thanks all for the help!
Nice! Glad we could help.
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