Bob for spindle control

[John S]

Depends on what spindle motor you have.
If it's the high speed water cooled Chinese ones then it's to the VFD. If it's something like a Kress then you need a variable speed power supply

[cropwell]

If it's something like a Kress then you need a variable speed power supply

If you want proper speed control from a Kress, you have to fit something with speed feedback like 'SuperPID' http://www.vhipe.com/product-private/SuperPID-Home.htm
I have got one sitting in a drawer, one day I might be arsed to fit it. Trouble is you have to hack out the original onboard speed control which means you have then dedicated it to the SuperPID, and I aint got time fer that malarky !

Rob

[Duffman]

I have a air cooled spindle with a vfd so I connect to it then. I will have a look today at the vfd and see if it is self explanatory as to where the wires go thanks for the help so far