I’m planing on upgrading to dual drive and I’m researching how things should be connected. As I understand, there are at least two options:
- Set up the VESCs as master and slave, and use the CANBUS port to connect them.
- Split the signal from the remote receiver (Y split). Have the same config for both VESCs then.
- Traction control. If one of the wheels looses traction, the interconnected VESCs can figure it out and adjust the spin of the other wheel.
- Realtime data can be read from both VESCs over single USB.
- less reliable
- If the master VESC dies, the slave VESC has no input signal and can’t work. Problem if going downhill since brakes won’t work on any of the two motors.
- Can fry a VESC if not connected correctly. I have seen a few mentions on the forum that you should never connect the CANBUS when only one of the two VESCs is power up since it will fry the VESC.
Does this sound correct? Are there other pros/cons?
Also, what exactly is the issue with having only one of the CANBUS connected VESCs powered up? Does the problem also apply when one of the VESCs dies? I mean, does it mean that if one of the VESCs gets fried, the CANBUS will take the other VESC down with it?
And last question: If the two VESCs are not the same, does that change anything? For example, I have the ESCape. I think I’ll just get another one, but I’m also considering the FlipSky 6.6. With the Y split, could it happen that the two different VESCs will interpret the input signal slightly differently and one will spin the wheel faster than the other one? Would that be any better with CANBUS?