Hey guys. Im trying to hook up mach3 to my vfd. Mach3 turns it on and off allready so what do i need to do for it to control the spindle speed.
I have a shoptask bridge mill converted to cnc and a reliance electric md60 vfd. Right now mach3 turns the spindle on and off and i can control thespeed  with an exturnal pot.

Any help would be great. Thanks.

try searching Franco (name of a guy) on Utube he does a speed control "tutorial"

I suppose you have read the Manual

http://www.distcache.org/pdfs/reliance_md60_manual_d2-3499.pdf

Ill try and find franco. Ive read the manual but dont understand Most of if. Haha.