I've recently upgraded my machine and that meant re-flashing my arduino and resetting all parameters from scratch with the new machine's spec. On some g-code files when the machine is moving it does so with a slightly jerky movement, it's definitely not mechanical, rather it seems that the interface is unable to send g-code fast enough so the machine speeds up and slows down erratically. I've been using CamBam and tried converting arcs to lines in the post processor but that has not made any change. I'm using the latest build of GRBL and I use UGS platform to send. I've tried on two computers and the issue persists I've attached the file that is creating the problems (arcs as lines) it does the same things if I use the arcs. It seems that there are lots of small arcs and that might be the problem. Is it something I need to change in the post-processor? any ideas?