Quote Originally Posted by andy_con View Post
spindle encoder? do you mean rpm feedback into mach?

the spindle doesn't affect the atc in any way. the z needs to be at the correct height so the atc disk can collect the tool, that's it.

I don't use any temp sensors
Ive done a Denford Triac mod to a CS Labs unit. I can help answer a few questions.

1. The spindle drive needs to be isolated. A new sprint 1220i drive is around £250.
2. The ATC needs that Z is set roughly at Z + 30 from home. This is set for me via my macro for M6 in Mach 3.