So I'm in the final stages of assembling my Pro. I'm currently stuck on the z-axis calibration step. After choosing "Move Axis" -> "0.1mm" -> "Move Z" and turning the knob so that the bed moves all the way up, there is still a 5-6 mm gap between the nozzle and the glas bed. I'm stumped. Looking under the print bed, I can see that the lead screws still have a few mm left, that would theoretically allow further upward movement... Did I install some mechanical part upside down, that's causing the gap? Or is the firmware just refusing to go those last few mm for some reason? Any help appreciated!
How far above the glass bed (and/or above the nozzle) is the IR sensor? Did you remember to first set Z-offset to -5mm ?
The IR Sensor was positioned as the build manual wiki stated. The solution was setting the z-offset to -10mm, I had a correction of 1.07mm after doing the subsequent fine calibration.
If I recall correctly, you have to move the bed manually (by turning the lead screws). I do remember a youtube video of Livi and Greg where this was the case.
According to the build manual, this is part of the z calibration for the dual, not for the lite/pro though. The solution via larger z-offset is fine by me though - less opportunity to manually scew up the previously nicely leveled print bed
