20057
« on: February 22, 2009, 06:29:07 PM »
Ok, sorry forgot to post back.
The true spindle speed is being used for the feed, to make sure I tested it out on my mill, it doesnt have Mach controlling the spindle speed.
What I did was Type G95 into the MDI to put it in FPR then I typed in M3S2000 so as far as Mach was concerned the spindle should be doing 2000rpm, the spindle requested DRO reflected that. Next I started the spindle and adjusted the speed to 200rpm then did a G1X200F0.5 in the MDI and the axis moved slowly, ie it was doing 0.5mm per rev at the spindle speed of 200 and not the 2000 that was set in Mach.
What will not happen, if you alter the spindle speed (once a feed has been set) it will not speed or slow the axis, the Feed OverRide is for doing that, the Spindle OverRide will just override the Spindle but leave the feed at 0.5mm/rev of the initial RPM.
So for example if you originally had spindle at 1000 and fed it at 0.5/rev it would do that, you increase the spindle to 2000rpm and the feed DRO would half to 0.25/rev but the actual feedrate would be constant.
Hood