I've been cutting some wood and I used the multipass. The problem with it is that every time it finishes a pass it retracts to the safe height and plunges again. If you have to cut something with many parts that adds up fast. Since most of the mutipass cuts are on the same part before they move to another I don't think that there is a need for the retract to safe height. I took it out by going into the GcodeUtil.rb and changing line 240, in NotePad++, by adding a '#' before the word 'aMill' and now the cut is continuous.

#aMill.retract()
aMill.move(point.x, point.y)
aMill.plung(cut_depth)

If you use it too make sure, before you run the code, that it will not run a cut across your work and destroying your work or your tool. This change works for me and may not work for you. It's your responsibility to make sure it's safe for you. If you are not sure, leave it alone.

 

Turns out the above fix had caused a problem. I didn't realize it was this fix until Mark suggested to re-install SketchUcam. I didn't bother to post here anything since no-one complained, meaning no-one cared about the retract. Now someone did and here is a better solution.

Replace the three lines mentioned in the OP with these:

if PhlatScript.useMultipass?
aMill.move(point.x, point.y)
aMill.plung(cut_depth)
else
aMill.retract()
aMill.move(point.x, point.y)
aMill.plung(cut_depth)
end

or just replace the attached .rb file. It still doesn't have the plunge tool option but it's a start. And this time it works with no problem, I think. Attached files GcodeUtil.rb (11.2 KB)Â