jamesonotc
10 W
- Joined
- Jun 19, 2015
- Messages
- 70
scoobiext said:VESC 1
The issue I am having with the first controller is that during the parameter detection sequence the motor initially spins slowly (maybe 10 revolutions in 6 seconds) and is very rough. After the initial spin up the motor vibrates loudly and moves at best 10-20 degrees. It does this twice before returning bad detection results and failing to detect the motor parameters. Both the blue and green LEDs stay on during the detection process and the red LED doesn't appear to flash. No faults are returned in the terminal window of the BLDC Tool. I have tried adjusting the low duty value (to a max of 0.20), and the current (up to 6 A) and min ERPM (up to 750) with no significant change. I have also tried a solution from this forum (I think 777arc, is to credit) to ensure that no application is selected for the VESC in the application window.
VESC 2
When I start the parameter detection process on the second VESC, the motor will initially give a quick kick, and then quickly coasts down to a stop. After this you can hear a weak noise from the motor but the motor doesn’t move, this happens twice. The red LED flashes 3 times during the process, once each time the motor starts (or tries to), and then the parameter detection fails. When I check the 'faults' log in the BLDC Tool, I get:
Scoobie, try adding a nice amount of no clean flux to the pins of the DRV8302 on both sides and drag the pins with a clean solder tip. This issue you're encountering is more likely due to a solder bridge connection between two pins on the DRV8302. I have build a lot of VESC and have experienced this many times with newly built chips causing the motor detection to go very ruff and fail detection. Clean up the DRV pins and motor detection will go smooooth as butter. If this doesnt fix the issue then clean the pins on the stm32 (very unlikley if you were able to program the VESC that the STM has grounded pins) but while you're at it you should redrag them and make sure they're clean..
If you need to... use solder wick to pick up the excess solder.