Fusion 360 plasma cutting error with post process Blackbox GRBL

That post has only been written and tested for router and laser cutting (-:

but let me get this straight, you want an M3 at the beginning of every cut and an M5 at the end of every cut when in plasma mode?
let me see what I can do.....

 

ok, grab the latest code from
OpenBuilds/OpenBuilds-Fusion360-Postprocessor
(not the release, you want the green button and the .zip file download)
and your plasma cut should be happy.

 

Hi @Sylvain Michaud - the gcode is there, CONTROL is just failing to display it correctly.

@Peter Van Der Walt this is that display bug on CONTROL (I thought you had fixed that!?)


yet bCNC shows all of it, exact same input file..

 

This does not matter, the S command is modal, GRBL remembers the last setting and uses it for the next M3 command.
I have just run your code through my test controller and it acts exactly as expected with the torch coming on for each letter and going off in between the letters.

 

I remember working on it, was something to do with the states when something preceded a G2/3 right?
You wouldn't happen to remember where the old discussion was, did a couple searches can't find it off hand.

Will check from this sample gcode in the meantime

 

it wanted a G word after an S word, a comment in my code says

Code:

// force a G word after a spindle speed change to keep CONTROL happy

but now there is something else going on because we have M3/5 sprinkled through the code.

 

Please update again as I have just uploaded an improved version. I noticed in your drawing that the tool routes around some letters when moving to the next letter to avoid crossing an already cut area. Those moves were so, now they are rapids.
If you turn off 'keep nozzle down' in the toolpath and turn on 'Use Z movements' in the post then the torch will lift up for those moves.

also, your S will cut better if you turn on smoothing in the toolpath. Without smoothing it is thousands of small line segments, with smoothing it is a few arcs and a handful of line segments.

 

Bug fixed, in 1.0.253