Super new to DIY eskates and was looking to upgrade my cheap complete longboard I got from diyeboards. I figured I would try my luck with FSESC 6.6 dual plus.
After setting it up in VESC tool and tested it on the actual road, I ran into some cut out issues. On the Xmatic app on my phone, I tracked my ride and noted that I received two fault codes repeatedly. The two codes are FAULT_CODE_DRV & FAULT_CODE_UNDER_VOLTAGE (i have attached a screenshot below). The cut out happens when I am doing full-throttle on the remote (VX2) for about 5-8 secs straight. I hit about 25-30kph before the cut out. The vesc itself would actually power off. Below are my specs and settings:
Belt Driven Longboard
5055 x 2 motors 270KV (from diyeboards) - 80a max continuous motor pulley - 13t, wheel pulley - 35t Flipsky FSESC 6.6 dual Plus w/ Switch 10s5p 10ah battery -> 50a continuous current UART VX2 Remote NRF for bluetooth connectivity
Motor Settings on VESC TOOL (FOC sensorless mode):
Motor Amps max: 60a
Motor Amps min: -40a
Battery amp max: 50a
Battery amp min: -20a
Max ERPM: 60000
I searched this forum for suggestions and tried to flash firmware again. Went through the same process and still had the cutout issues. Also read that, the DRV chips could be faulty.
I contacted flipsky directly. After speaking to Xu at flipsky over email, she told me to reprogram and make sure to use default settings (100K ERPM). I used everything default, I did motor set up in FOC in VESC tool and did not change anything. The cutting out is still happening. This time the vesc tool defaulted to these settings after running detection in FOC mode:
Motor Amps max: 49.69a
Motor Amps min: -49.69a
Battery amp max: 130a
Battery amp min: -60a
Max ERPM: 100,000
Same exact problem. FYI, I also tried it in BLDC mode with now success. They are now just asking me to show a video of how I set it up. To me, that will get me nowhere, but I may just do that just to give them something.
Many are suggesting the issue is due to hardware quality. Any help would be greatly appreciated!
Here are the logs from the default vesc tool settings as mentioned above. I’ve highlighted the rows where the cut outs happened. starting at 320t ish row then another around the 1100th row. You can see the motor current goes up to 70a.
Please visit google drive link here --> https://drive.google.com/open?id=1dKBvWBK3zJavOXHx3jUHM38AnxXv10Eq