I have a shizuoka knee mill with a fanuc 6mb control.I am having problems with setting tools.After touching off top of part and zeroing out the relative cordanence if I push the reset button it zero's out the absolute.if I move the Z axis a little and return the axis back to 0 relative and push reset it changes the absolute again.If I put an offset in the work offset G54 in Z and hit the reset it changes the absolute agian.I checked the DNG 704,713,714,801,802and 890 have digits that are flickering and there is a slight buzzing sound coming from the Z axis motor.Is the gain need adjusted ? any help would be much appreciated.