Thanks for the replys
My actual application is a dispensing head which has a stepper motor, ( mach mill )
I have been trying to acomplish this, with it set up as a spindle,
so it really does not mater which way the relationship is between the feedrate and spindle speed,
as long as they are tied together,
I read that the G95 command is only for lathe? could this work for mill?
my cnc router is currently using 4 axis's for motion with the y slaved to the a, so I don't have that option