Bridgeport Manual to CNC conversion...

[Davek0974]

VFD control ?

I currently have my fwd and rev signals wired through two relays using the built-in VFD control supply to control itself.

Is this worth it or should I bin the relays and connect the VFD ground to the CSMIO control ground and go direct from CSMIO output to VFD input?

Its a little layer of isolation but also mechanical complexity if not needed.


Safety relays....
The CSMIO manual shows a PILZ safety unit being used, I gather others are just as good? PILZ are damn expensive but other like Telemechanique items are better priced.

I gather they are used because they monitor the main control contactor/relay and also offer forced contact seperation etc internally, any other reasons? Any types to look out for?