"I already have a freewheeling diode before my relay coils"

I suppose you mean ACROSS and not BEFORE.


"I drive the Grinding motors contactors via a 110VDC return from my onboard potential free contacts of the relays make and break the Grinder motors contactors "

Sorry, I am not good at reading long sentences - by the time I reach the end, the begining is gone! I have read this so many times - but still not very clear as to what motor you use - AC or DC ? And what is this 110VDC stuff ?

Raghu