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?
Are these the new Focboxes from China with the 14 awg phase wires and 3.5mm bullets.
Also can you please share the specifics of the setup and bldc settings?
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.