I thought these things were more robust but it seems they are not.
I bought 4 Focboxes for my Trampa, 2 for immediate use and the other two for spares.
Right off the box, the first Focbox threw an overcurrent fault when I pulled the trigger at full throttle, the scary part was during the error the Focbox kept the board at full speed, no response from the remote for 3 seconds, pretty scary feeling. That VESC is already back to Enertiin fir warranty.
The second Focbox died on me while braking 4 days ago, only one wheel was spinning slowly on full throttle. The bad VESC wheel had resistance if I turn it by hand, so I unplugged each of the three phase cables one by one, when unplugging the center phase cable the motor was released and it brake when I plugged back in.
Can anyone help me finding the culprit of the second VESC issue?
NYC, I run a repair shop, after replacing 1000s of iPhone logic board ICs, anything on the vesc I can do half asleep lol
Sadly I got the focbox thinking it had some magic sauce that made it worth the premium and I thought I could rely on the warranty. After mine took a dirt nap and I diagnosed and repaired it myself I realized I shouldve just made one myself
If the 3.3v pin is shorted with the GND pin then you’ve blown the canbus transceiver. Just use a multimeter to check this.
You can blow that part when you are using two vesc-x/focboxes connected by canbus and power them on/off one by one.
To avoid this you must power both vesc-x/focboxes on at the same time. I highly suggest that you make a cable to connect the two in parallel.
To repair this you’ll need to replace the canbus transceiver.
The P/N is SN65HVD232DR and I ordered my replacements from mouser.
I used an “smd rework station” to replace the chip.
After replacing the part you should be good to go. It’s a pretty tricky repair job to do it correctly, and it’s really easy to fuck your boards up and make them completely unrepairable.
I have a short on 3.3V line on my maytech vesc. And I do have smd rework station but never used it. Do you think by watching few YouTube videos I should be able to preform procedure myself ? Im kind of scared haha.