I don’t know if this is even the right terminology, but here’s my problem.
I attached a 2 ft by 2ft square piece of MDF to the wasteboard (I am using misumi Tslot). I ensured the edge of the MDF was up against the edge of the front steal cross member.
Then I cut a pattern of slots that are 20mm wide, by 520 mm long. Great. Looks good. After the job ran, the machine goes back to home.
Load the next file, which is to “pocket” some holes in some parts that are placed in these 20mm by 520mm slots, the slots are supposed to serve as a consistent means of locating these parts.
The left side starts, makes the holes nicely (2 on each end of the part). Then it goes to the right side, and it is skewed toward the front, making the holes off center by at least 1-2mm. Just to thrwart the potential responders saying check your file, I’ve already done that. The designs are Fusion 360 and yes the paths are parallel to the X axis.
Another example is, cutting a circle job, then re-run the same job. You would expect it to basically “air cut” the second time around, but it actually cuts more material towards the rear of the hole.
In between the two jobs, nothing physically has moved. It’s just that the machine, after it goes “home” and comes back things get wonky. Is the right Y motor and left Y motor on the same drivers, getting the same current? What could be the problem, and how can I “calibrate” it?