I took several measurements from various places on multiple mini 2s that were experiencing the inconsistent skirt issue as seen in T2220 and several mini 2s that had passed through calibration.
I measured each of the height of each of the probe disks from a granite block in the order that the machine probes in (BL -> FL -> FR -> BR). I averaged out each side and compared the difference from left to right.
|Y Axis Left to Right Diff|
We see can see here that the left side of the bed is slightly higher than the right.
Following this we gathered measurements from the granite block to the top of the x-axis rods, taking 4 different points as we went from left to right. Then we averaged the left and rights side and compared the left side to the right side.
|X Top Dif|
The final thing that we looked at is the difference in spacing between the y bed and x-axis and then compared the left and right sides.
The first two sets of data are confirmed to be having an issue with inconsistent skirts and we saw that the nozzle would not even touch the bed when leveled to the very bottom of the axis. The last five sets of data are from printers that have already passed through calibrations.
Raise the height of the y-axis (by adjusting the y motor mount and y idler mount) by approximately 0.3mm-1.5mm to bring the y-axis to a point where the nozzle can hit the bed and allow the auto calibration to have more affect.
@logan Suggested using the shims from the foxglove days to boost up the y-axis so that we can test the printers with this current issue.