HEIDENHAIN MANUALplus 620 Technical Manual page 1559

January 2012
The M codes listed in the following table "usually" have the described
meaning.
M code Function
M3 CW spindle rotation for spindle/screw 1
M4 CCW spindle rotation for spindle/screw 1
M5 Spindle stop for spindle/screw 1
M19 Position control for spindle/screw 1
M33 Open the spindle chuck while it is running
M36 Open the spindle chuck
M37 Close the spindle chuck
M103 CW spindle rotation for spindle/screw 2
M104 CCW spindle rotation for spindle/screw 2
M105 Spindle stop for spindle/screw 2
M119 Position control for spindle/screw 2
M203 CW spindle rotation for spindle/screw 3
M204 CCW spindle rotation for spindle/screw 3
M205 Spindle stop for spindle/screw 3
M219 Position control for spindle/screw 3
M303 CW spindle rotation for spindle/screw 4
M304 CCW spindle rotation for spindle/screw 4
M305 Spindle stop for spindle/screw 4
M319 Position control for spindle/screw 4
8.6 M Functions (M Strobe) 1559