Being a programmer, I know it's in the code, I just don't know enough about all the gcodes yet to decipher. I've leared a lot from these post and I'm sure you gurus will be able to make this look simple. I'm a recent newbie and very green to machining and CNC so please be gentle. So Although I don't know why, it appears the machine is cutting what Mach is telling it to.

Loading this gcode in Mach and watching the coordinates, when X reaches the -5.5 or +5.5, it will sit there for a significant amount of time all the while Y continues to move. the issue is persistent with BobCad and Mach or at least with all the Mach post processors I've tried (been to their site and downloaded all the latest post processors). I've tried using machine compensation, etc. I've also tried to turn off the CV and radius compensation in Mach. I've tried both the absolute and incremental settings in Mach and in BobCad. The part I'm making when this reared it's head is more complexed but to just get back to basics, I created a single ARC with a. Having read a lot of the issues with BobCad, I thought it might be the post (and it still may be) but I noticed the lines it is failing on appear to be canned cycle type lines and not independent code. The X max/min is the same as the Y max/min and Mach doesn't hang on the bottom or top of the circle, just on the sides. At first, I thought it may be a backlash issue but I can cycle Mach 3 without the machine running (simulation mode basically) and if I slow the feed rate down, I can see it sits on the X-axis while it cycles the Y at least. What I've noticed is when the machine gets to the furthest X coordinates (where these verticle lines are), it hangs a bit. Post it to Mach 3 and the screen generation in Mach looks ok.

Have tried several different diameters and tool bits. Not a lot but enough to make my circle not a circle o) I'm now getting a circle with 2 parallel sides flat. Things were working great a few weeks ago so I'm guessing I've bumped something somewhere.

I've been having some issues trying to mill a simple circle using BobCad 23 and Mach 3.

Esti cam cnc arcs circle not working