bq witbox 2, Quick Start Manual

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Levelling the print bed
Your Witbox 2 comes with an auto-levelling system that checks the angle of
inclination of the print bed prior to printing, by measuring three points in order to
be able to compensate it. In auto-levelling mode, if there is any inclination on the
bed, the printer will adjust the movement of the motors accordingly so that it
prints correctly. Achieving good printing results depends on the print bed being
levelled correctly.
Why is it important?
If the extruder nozzle is too far from the bed, or if one part of the bed is closer
than the other, the printed objects will not adhere correctly.
If the nozzle is too close to the bed, this could prevent the filament from
being extruded, which would damage the extruder and could also scratch
the bed.
Adjusting the offset
The offset is the distance between the inductive sensor at the rear of the
extruder and the bed. To adjust it, go to
Settings > Offset . The printer will read the
three points automatically and stop in the centre, enabling you to adjust the
distance between the extruder nozzle and the bed.
The offset will be correct when the nozzle is lightly touching the bed. Otherwise,
you will need to turn the wheel to the right to move the nozzle closer.