I have a bridgeport interact 308 with a tnc 2500. The problem i am having is when the spindle is running backwards the actual RPM is half of the programed RPM. Doesnt matter if its in manual mode, program run mode, M04, or even a tap cycle (Thats the one that kills me.) Is there a prameter that can fix this. I have gone thru the pram list and everything seems to look OK. It has the Flux vector drive if that makes any difference.
Thanks,
Craig