Ed wrote:
> I recently purchased a small HMC with Fanuc control and red cap AC 
> motors. The control and probably servo drive will go on Ebay as I have 
> no docs with the system and it had been partly dismantled. A couple of 
> questions, Does antone know if a VFD will work on a PM 3 phase motor as 
> well as a squirrel cage type?

Some VFDs will work with some PM motors, but different control 
algorithms are required.  If the drive maker didn't specifically include 
PM control, it most likely won't work.

> That would make the spindle drive much 
> easier. Does anyone make an amp that works well with EMC and can drive 
> an AC servo? Motors specs are: 198V at 7.6A at stall. Jon, will your 
> system work with this? I can change the encoders. Thanks.   Ed.

If you have AC servo drives already, you _really_ want to search for 
docs, etc, before you give up and ebay them.  AC servos are much more 
complex than DC servos - if you've got drives that are matched to the 
motors, use them.

Regards,

John Kasunich

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