pgh3, thank you Peter for the speedy reply. However, I was hoping that fellow members caught the fact I was am using a "hot wire CNC machine" which unlike a "router" type, the "bit" is a hot wire that continues to burn the foam it is cutting, regardless of movement or spindle stopping. My question is how to stop and restarting a work "without" unnecessary burning (cutting) of the foam. I am certain that anyone working with "hot wire CNC" can relate.