Hi there! Here is my first post about my board. I have been browsing the forum for 3 years. Now I’ve decided to create an account, cause I cannot find answer to my problem. Recently I’ve finished build of my mountain like longboard (well… some Polish roads are terrible ). This is my second attempt - first one was almost the same (one year ago), but with smaller wheels.
TL;DR: ABS OVER CURRENT error at full throttle, asymmetrical power cables from batteries - is that a problem?
Long story: Yesterday I made a test drive. I was slowly spinning up longboard and when I was at full throttle, the engine stopped (and I fell off the skateboard). It happened only once, since I was afraid of falling again I had something around 24 kmph (15mph).
I connected the VESC to the computer and in the terminal I had only one error:
Fault : FAULT_CODE_ABS_OVER_CURRENT Current : 148.0 Current filtered : 132.6 Voltage : 29.44 Duty : 0.005 RPM : 27178.5 Tacho : 1053289 Cycles running : 623544 TIM duty : 265 TIM val samp : 132 TIM current samp : 26714 TIM top : 53164 Comm step : 1 Temperature : 53.86
I have tested the motor with multimeter, battery connection, VESC (visual contition) etc. and everything seems fine. In the first build I had exactly the same problem, but in Turnigy 4.10 VESC. After switching to directFET VESC problem still occur. Both VESC’s were send to manufacturer and they passed their tests.
Today I gave another try and the same problem appeared on around 85% of throttle … No DRV errors encountered.
Some ideas: Maybe someone have an idea what is wrong with this build. I suspect the battery problem but I cannot find any information about different lengths of a cables. In my configuration positive one has 38 cm (14.9 inch) AWG10 and negative one has 63 cm (25.6 inch) AWG8. I have spent a lot of time on forum to find similar posts, but most of them were connected with VESC hardware problem.
Another suspect: motor. I tried detection again and at the first time value of BEMF Coupling was around 900, but now measurement is around 760. Problem still occurs.
5065 Outruner 270KV (measured 240KV) 1665W in BLDC mode DirectFET VESC 4.12 8s8p LiIon battery (LG MH1) Gear ratio 15 / 56 HTD-5M
Pictures of board:
Pictures of VESC Tool:
Thank you for reading this post and I’m counting for your help!