Appreciate some help here, learning all the ins and outs of g-code is still on my to-do list 
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Doing a practice cut in 3/4 mdf, inset and cutout for a router lift in a new router table top. Toolchain F360 cad/cam, CM 4.0.407, SO3 XL. See pics attached for error description and g-code in question.
Sorry in advance if this is too minimalistic but my experience is a pic or two are worth a few thousand words. Please ask if I need to provide more.
Thanks!
Here’s a list of what is or isn’t supported, but I can’t see whats wrong?
https://www.shapeoko.com/wiki/index.php/G-Code#G2_-_clockwise_arc
Did the piece finish? Was there a tool change ? M9 is coolant control not supported. That’s the best I got lol.
Thanks Jerry, Ray. I’ll try running the code again without the coolant command.
This seemed like a really random error, the cut was 97% complete. Actually, I confirmed all the critical dimensions are exactly where I want them to be so no need to run it again. I’ve thought of a quicker, more efficient tool path for the actual table top.
