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Sporadic Duty Cycle

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Patrick Donovan
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Joined: 2019-10-09 18:17
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Sporadic Duty Cycle

Hello, this is my first post on the forums. I had a 4.12 vesc based speed controller and I damaged it so I used the stm32f4 chip to fix a vesc 6 based controller after its processor died. I had an issue with the duty cycle pulsing between -150 to 150 % and it continued to happen after I had soldered it onto my new vesc 6 based esc. I was able to connnect and update the firmware so that the stm32f4 would work. I am suprised i made it this far. I was wondering if anyone knew the solution to the duty cycle looking like some sort of digital communication. Ill post a screenshot below. or to the left or wherever it goes. https://imgur.com/WlVCZiy

TheFallen
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Joined: 2017-09-11 11:46
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You probably wanted to link to https://i.imgur.com/WlVCZiy.png rather than the Imgur page.

It's entirely possible other chips on the board e.g. DRVxxxx is also blown.

Patrick Donovan
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Last seen: 1 year 2 months ago
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Joined: 2019-10-09 18:17
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Well that is possible although on the original vesc this uc came from I had replaced the drv chip but the duty cycle problem was not fixed. I assume that the duty cycle on the vesc tool is a measured reading. I wonder what pin on the mcu gets that information. I will replace the uc with a brand new one and flash new firmware to it. To see if that fixes it.