Quote Originally Posted by Daveo View Post
OK, Ordered some diodes but have to wait for them,not the same since maplins closed...
jazz will i be able to control the speed via Mach3
Yes and turn it on/off. But you will need to set it up in the spindle control and set the outputs so can turn it on/off.
The manual should tell you how to do this because different controllers have different setups. If you can't find it or it's not obvious then let me know and I'll take a look.

Edit: you will also need to set the VFD up so it knows it's being controlled from an external source. Again the manual will tell you the parameters to set.