Just sharing this here. Something I ran into when trying to generate a tool path for a fusion360 project. I really like some of the features in Strooom's post processor for the OX machines however there appears to be a few limitations with it that caught me this time. Epsecially throwing error:33 & error:34 commands back from GRBL as it was trying to parse the file. Solved: Re: Contour takes off on tangent G03 but not on similar pocket elsewhere - Autodesk Community
This issue was reported several times, although I did never encounter it myself. Looks like it results from very small arcs which are generated by Fusion when it does things like adaptive clearing, of 3d milling.. the postProcessor was improved to handle all arcs down to a certain size with enough precision, and all arcs smaller than that will be linearized to a chain of linear segments. Give it a try : Strooom/GRBL-Post-Processor
Thanks for looking into it Strooom. I've been using one of the integrated Fusion360 processors since but ill grab the latest version and give it a shot soon.