CraftUnique CraftBot Desktop User Manual page 31

HOW TO LEVEL THE BED/HEATED BUILD PLATE
By moving forward via the touchscreen, the extruder will first of all go to the
"home" or zero position as a reference. From here it will move directly above the
center knob and will ask you to "Adjust the front knob under the extruder until the
spacer card slides freely but with just a small amount of resistance between the
nozzle and the extruder". To move the bed closer to the extruder, turn to the left
and decompress the spring. If the card does not slide through so easily, then it
is too tight and you will need to back it off a little by turning the knob back to the
right. Once you feel satisfied, precede to the next step by touching the forward
button. The extruder will then move directly above the rear right hand screw and
will ask you to do the same calibration with the spacer card. Then you will move
forward yet one more step, in turn sending the extruder to the rear left knob. You
will conduct the same measurement.
Once the three positions have been calibrated, then it will run through them
once more just to make sure. This is an important step because if there is any
discrepancy in the initial angle of the bed upon setup, due to the height difference
of the knobs, the bed can be a little off and not yet accurately ready to print with.
So it is a smart decision to repeat the steps and make sure.
Once the bed leveling process has been completed you can use the forward arrow
button to move along to your next task, such as printing funky things.
31 The first steps