Ok, so I am getting pretty frustrated here. I am making some taphandles for a local bar and I have run into some strange issues. At first I thought the could be mechanical and took a tune-up of my machine, found that one belt was a little loose. NOTE: this machine has been running flawlessly for about 8months now, after a driver-upgrade to DM542A from the onboard drivers on the xPro. All the screws, belts, pulleys etc is as it should be, and the machine is sqaure and I turned down the current a little just to rule that out as well. I did a new test, rotated the position, restarted the computer. Still same issue. The long pocket (as you can see in the pictures) is offset to the sides, my about 1mm. The sircle is as it should be. Third test, did a new cad-drawing and completely new toolpaths. The issue appears again. This happens in the exact same place, direction has nothing to do with it. The drawing is straight. The circle-pocket is in center and the sides are 6mm as they should be. The long pocket has the right internal dimensions. Why this long pocket is shifting again and again is getting frustrating. Using Vectric Aspire, GRBL g-code processor, and GRBL Panel to run it. Never had any software issues, the computer has never been updated or changed since I got the OX. The OX has never lost any steps, stopped or nothing until this happend. Things have usually been quite good out of the router, for what this machine is. Take a look at the picture - hope you can help me here!