See if this helps. I have to machines with OT controls. MF-T4 & MF-T6
T4 uses the one line G71 P Q U W D0750 F
Do not used decimal point in D
T6 uses the 2 Line G71 U.075 R.03
G71 P Q U W F
U = the depth of cut and must have decimal point.
Hope this helps,