We have been doing some extensive testing with a pre-released version of PicSender. This was raster engraved on Birch Ply with our 6W 450nm laser diode on our Shapeoko 2. A variable feedrate was set between 200 IPM (white) and 150 IPM (black) using our Feed Rate Change feature in PicEngrave Pro 5.
The laser’s power range was set at a Min S15 and Max S255 and there were 1,507,509 total X,Y,S & F command lines in the gcode file. It was streamed to the J-Tech PWM 9g grbl firmware.
