i have a new K8800 3d printer.
I’ve tried to do some prints but most of the time they fail.
the calibration always succeeds without errors, but when printing the first layer, the printer hits the print bed
i also have layer shifting in some prints.
the vertical slides do not move very smoothly.
I measured the vertical slides, they are 71.5mm
this is a picture from the top, with one screw mounted for the rod
i found this on the forum
as long as I can’t make good prints I can’t make this upgrade