Board cuts out under full throttle, unable to map ppm

DIY Builds
1

Hi all, I just finished up my build featuring a Stormcore 60D, vx2 and dual sensorless FS 6384s.
However, I find that whenever I reach near full throttle, the board cuts off the power, then comes back again. Im wondering if this is either an amps limit issue as I currently have mine set to 60a, or a remote calibration issue. However, every time ive tried to configure the vx2 using vesctool, the board doesn’t respond to input when paired. I asked a friend about this and he says I don’t have to calibrate vx2s using vesctool. Im also wondering if it may have something to do with the fact that im running non-sensored? Finally im thinking it could also potentially be an issue where the pins on the receiver arent going in all the way.

Any help, comments or feedback is greatly appreciated.

Thanks!

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vx2 is uart remote, no need to map ppm

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3

the VX2 use UART to communicate with the vesc not ppm or pwm so you can not configure it in the VESC tool, pair your remote with the VESC then calibrate your remote(see the remote user manual)

why do you run sensorless btw ?

did you program the VESC to run sensorless?

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What battery are you using? Did you change the 99A battery max default values?

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im not sure how to program the vesc to run sensorless. Also the motors came with a different pitch sensor cable connector than the port on my esc

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6

did u map the throttle max min in the remote itself? long press the mode buttom to get into setting, press once to go to next item until u see throttle map. sometime FS doesn’t calibrate it before packing it into the box

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ah i was wondering what that was. would you by any change know what steps to take from the throttle map screen?

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Are the cutouts only while driving or also without load? If they are only while driving it could be a voltage sagg problem. You maybe draw more power from the battery than it can supply. It would help to know what battery you are using.

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Im using a 12s6p of panasonic ncr21700s so i should be able to pull 90a from the battery

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the cutouts only seem to happen with load / someone on it

11

have you limited the battery current to 45A per side ?

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12

Bms bypassed?

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absolute max amp, set it to whatever the maxmium the app / vesc tool allows u

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14

yep

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not sure, i didnt configure the settings myself but i will open it up soon and have a look

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so 99a?

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there is a difference between battery current, motor current and absolute maximum current.
Battery current should be your battery max A divided by 2 (~45A)
Motor current whatever your motors can handle (~80A)
Absolute maximum current is at 150A by default but can be set higher. this is only for very short spikes.

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To clarify, did you mean like cut off as in the whole board turns off? Or is the board still on but you can’t control it anymore with the remote?

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I think the board stays on, the power just cuts and jerks me forward

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Ill try it with the app and see what it reads