Re: Question about using marlin in laser cutting applications

another point. I remembered why I was using the old plug in. It was dedicated for generating G code that can be read with repetier. I tried the laser plugin that you sent me, and I generated a simple output of 3 squares drawing:
M107 S0

G90
G21
G1 F3000
G1 X45.9619 Y81.4413
G4 P0
M106 S255
G4 P0
G1 F100.000000
G1 X105.6317 Y81.4413
G1 X105.6317 Y41.1238
G1 X45.9619 Y41.1238
G1 X45.9619 Y81.4413
G4 P0
M107 S0
G1 F3000
G1 X80.6349 Y178.2032
G4 P0
M106 S255
G4 P0
G1 F100.000000
G1 X152.4 Y178.2032
G1 X152.4 Y129.8222
G1 X80.6349 Y129.8222
G1 X80.6349 Y178.2032
G4 P0
M107 S0
G1 F3000
G1 X49.9936 Y266.0952
G4 P0
M106 S255
G4 P0
G1 F100.000000
G1 X99.181 Y266.0952
G1 X99.181 Y227.3905
G1 X49.9936 Y227.3905
G1 X49.9936 Y266.0952
G4 P0
M107 S0
G1 F3000
G1 X0 Y0
M18


but when I copy and past this now in repetier, the visualization does not show anything, as if it does not recognize the code!
but when I added manually in the beginning of the code :
M452
M3 S255
then repetier could darw visualization of the the code.
why is this happening? ae not there any way that the plugin put these 2 lines automatically?