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s2740vc does not work on 6s lipo #16
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@bendyer Is this a firmware related issue or something for real? |
@CarlOlsson I notice you had a JTAG adapter attached—was there an active debug connection, and were any breakpoints set? Also, what motor was that? From the two-second delay it sounds like the failure occurred as the motor resistance and inductance test was starting. @LorenzMeier I don't think it could be firmware if the device wasn't re-flashed between 12 V operation and 24 V operation. I have just re-run two units on 25 V, and they work fine, but then you'd expect a component rating/marginal component issue to exhibit board-to-board variation (and it's notable that this is a different failure mode to the other board). I'll test my remaining units at the full 27 V to see if they exhibit the same problem. |
Hi Ben,
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Potentially related to the braking on #18. |
My task was to test the s2740vc on 24 volts.
Connected a 12v power supply and spun the motor, no problems.
Connected 24v battery, after approx. 2 seconds there was a spark and smoke. A resistor came off and now there is a short circuit between the ground and power connection.
The setup:
ESC after spark
Of course I should have used a current limiting power supply if I had one. We do have a fuse but did not consider it since well, I forgot it and I really thought that just voltage without spinning the motor wouldn't destroy it
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