[WesM]

HI all, I am looking for some solid VFD recommendations for a retrofit I am planning out. I wouldn't mind learning a bit about whats important to have in a VFD as well. From what I have read it seems like a vector sensorless drive is desirable for low speed power requirements.

Something I am a little fuzzy on is the breaking aspects built into these drives. Most of the VFDs i have looked at seem to say they have some braking capability, some suggest a braking transistor might be required, but then some suggest it is not necessary in smaller HP ratings.

These are a couple of the drives I am looking at. The Hitachi WJ200 seems to come up a lot, so that could be an option. The spindle motor on my machine is an 8.6 amp, 3 phase, 1720 rpm motor.

https://www.wolfautomation.com/revie.../category/165/


https://www.precision-elec.com/shop/i51ae222b10011000s/


The RoboTool also has an airbrake hooked up to the spindle. Would it be advisable to use the VFD for braking and remove the airbrake? or use the airbrake and not use the VFD braking function?