Quote Originally Posted by JAZZCNC View Post
The only fan is inside the VFD to cool the electronics, the spindle doesn't have any fans. Some Vfd's the fan only comes on when VFD is running whatever is connected, some come on at power-up and stay on. The huanyang VFD is on all the time. (That said some Huanyang models do have load driven fans but can't remember the model #)

Only need a braking resistor if you want to use DC braking to stop heavier loads. For the most part, provided you don't have the Spindle de-acceleration time too short and not using heavy or wide tooling then won't need a resistor.
Thx for the info.