If you need to debug software generated G-code or create code by hand, understanding the arc command may be necessary. At first glance, it can be confusing. This article attempts to explain the arc command. It also documents an old Mach3 bug associated with drawing arcs on the XZ plane plus offers a work-around.
If you are interested, please see
http://rick.sparber.org/ARC.pdf
Your comments are welcome. All of us are smarter than any one of us.
Rick
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