@woodworksimon
sorry, lost the question - try again...
If I have understood it correctly, then from the code above, the G1 command controls the laser power output and the M106 controls the frequency of that output. So for my example, in the header I use M452 P2 without the r255, still use the M106 p2 S0 to direct the output to 5v fan output, but I don't then need the M106 P2 S0.1 in the first feed move, but replace it with G1 X Y F S25 for a laser power of 25/255ths. Thereafter would the s25 be inherited in the begin feed moves. Is that power modulated to suit the xy speed to avoid overburning, and is it down to the software used to modulate output ie if you are burning a halftone image?
So many questions - apologies!
