M4 - Spindle CCW / Laser On

1.1.2 control Set the spindle CCW speed or laser power SPINDLE_LASER_ENABLE

Wait for moves to complete, then set the spindle speed (counter-clockwise) or laser power.

S is interpeted as the configured value range: PWM (default), Percentage, or RPM. (See CUTTER_POWER_UNIT)

M3 and M4 aren’t needed with LASER_POWER_INLINE and LASER_MOVE_POWER enabled. Power is set directly in G1…G5

M4 [I<mode>] [O<power>] [S<power>]

[I<mode>]

Inline mode ON / OFF.

[O<power>]

Spindle speed or laser power in PWM 0-255 value range

[S<power>]

Spindle speed or laser power in the configured value range (see CUTTER_POWER_UNIT). (PWM 0-255 by default)

Set spindle rotation counter-clockwise at 50% with CUTTER_POWER_UNIT set to PERCENT

M4 S50

Set spindle rotation counter-clockwise at 50% with CUTTER_POWER_UNIT set to PWM

M4 S128

Set spindle rotation counter-clockwise at 80% in PWM

M4 O204

Turn on the laser at full / SPEED_POWER_STARTUP power

M4

Fire laser at 80% on next G1,G2 and G3 move

M4 S204 I