Interesting results of more testing! Inline can actually do Trapezoid power! When i just create Inline GCode from LightBurn, It looks like that:
M107
M05
G0 X3.12 Y3.12 F0
G0 Z0
; Layer C00
G1 X2.88F6000 I S255
G1 Y2.88 I S255
G1 X3.12 I S255
G1 Y3.12 I S255
M05
G0 X3.24 Y3.24
G1 X2.76 I S255
G1 Y2.76 I S255
So laser is switched on by the G1. If I run it this way, it does constant power, no adaptive power. If I modify it this way:
M107
M05
G0 X3.12 Y3.12 F0
G0 Z0
; Layer C00
M04
G1 X2.88F6000 I S255
G1 Y2.88 I S255
G1 X3.12 I S255
G1 Y3.12 I S255
M05
G0 X3.24 Y3.24
M04
G1 X2.76 I S255
G1 Y2.76 I S255
it does trapezoid power adaption! Again, M4 does the trick, also with inline power. EDIT: And it is enough to state it once.
That makes me happy - it means I can use FlatCAM code for PCB laser etching - I am just running the test from this post again - will take 2 hours or so, but will report back!