S0 in greyscale engrave with >0 minimum power

LightBurn Software Questions
1

I’ve got a minimum and maximum power set for greyscale engrave in a particular job, yet some of the generated gcode shows a spindle speed of 0. Here’s an excerpt from a horizontal line.

…
G1X0.5S40.175
G1X0.5S0
G1X0.5S40.068
G1X0.49S40.606
G1X1S40.068
G1X0.5S67.433
G1X0.5S0
G1X0.99S40.068
G1X1S0
G1X0.5S47.609
G1X0.5S60.645
G1X0.49S45.67
G1X0.5S42.33
G1X0.5S49.979
G1X0.5S40.068
G1X0.5S52.35
G1X0.49S54.935
G1X0.5S67.002
G1X0.5S46.424
G1X0.5S40.606
G1X0.5S67.433
G1X0.49S0
G1X0.5S67.433
G1X0.5S40.068
G1X0.5S67.433
G1X0.5S40.068
G1X0.49S64.093
G1X0.5S46.855
G1X0.5S57.198
…

Those S0 speeds should not be there in the middle of a line, and they’re throwing off the engraving.

The cut specifics are:

Spd 25/mms
Max 6.75 (grbl power range is 0-999)
Min 4.0
Line interval 0.498
DPI 51
Mode Greyscale

Thanks

3

I think the rasterizer skips white pixels, even when doing grayscale. I’ve just changed that.

4

Cool. It’s probably okay to skip them if the minimum power is 0 though.

5

I’ve made it respect transparency. If you want skips, make an image with transparent portions.

6

Nice solution, Oz.