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INFORMATION: Available from MASSO software version 5.13 and higher - Supported Tool: Laser (Tool 111)

This command immediately turns on the laser engraving PWM output at the level specified by the S command.

This command is used when the laser needs to turn on at a specific location, such as drilling a hole or for applications like spot welding.

It can also be used in MDI mode to turn the laser on at low power for alignment. Use M5 to turn the laser off.

INFORMATION: The M04 G-code command does not light up the Laser button on the screen, as this button is linked to the laser enable M03 command.

Syntax & Parameters

M04 – Laser on immediately, with or without an S value
M4 – Same as M04
S – Optional value from 0 to 1000, defining the PWM power level from 0% to 100%. If not specified, the last S value is used

Example Program

N10 G0 X0 Y0
N20 M04 S500
N30 G04 P1000
N40 G1 X10 Y10 F100
N50 G1 X20 Y10 S800
N60 M5

N10: Moves to X0 Y0 at rapid speed
N20: Laser turns on immediately at 50% power
N30: Laser remains stationary at 50% power for 1 second and burns through the material
N40: Moves to X10 Y10 with the laser on at 50% power and a feed rate of 100
N50: Moves to X20 Y10 with the laser on at 80% power
N60: Turns the laser off