Relevant for
Starting with the firmware version 3.0.12, more detailed information about XYZ calibration results becomes available. This feature can be found in LCD menu -> Support -> XYZ cal. details.
The first screen tells you the distance of the “perfect” position of your front 1st, 2nd, and 3rd calibration points. Ideally, all of these are positive and at least 0.5 mm or more. If the margin is between 0 and 0.4 mm, then there is a chance that your calibration will not be successful ("XYZ calibration failed" error).
To achieve the best results, aim for the smallest possible difference between Left and Right numbers. A difference of up to 0.1mm is considered good.
Pressing the knob will take you to the second screen. This screen identifies how far you are from the perfect perpendicularity. It is measuring the skew of your X/Y axis.
It may seem that the compensations are not that significant. However, if we take into consideration the 250 mm X-axis length, 1.1 mm is a large margin. In order to improve your axis perpendicularity, make sure the difference in the front calibration points distance is minimal.
When you get your axes perpendicular or just slightly skewed, nothing needs to be tweaked as the printer will perform with the best accuracy.
4 comments
Did you try to start with the middle screw, as is instructed in the assembly manual?
Hi! If you are using the MK2/2.5/S printer, ensure you are running the stock unmodified setup and try to square the frame by adjusting the threaded rods so that the frame is perfectly squared. A square gauge might be helpful in this case.
Y distance from minimum of left 9.99mm and right 9.73mm
Skew of 0.15 degrees
[0;0] point offset of x -2.22 and y -0.49.
can you point me in the direction of the thing(s) i need to adjust please?
Hi! Check the pulley on the motor is installed correctly.
Check the y-belt-holder and y-belt-tensioner parts have the correct orientation, the heatbed cable does not hit the wall behind the printer and there is nothing disabling the heatbed from reaching the furthermost position. Keep watching if the PINDA probe isn't giving you an intermittent signal :)