Endless rotation
In the case of endless rotation (M03/M04), the speed and the direction of rotation are commanded. The spindle is accelerated constantly or in accordance with characteristics. Endless rotation is terminated by spindle stop (M05), reference point travel (G74) or a setup block (M19).
DIN66025 programming
M3/M4 S..
Extended syntax
S[M3/M4 REV..]