Robox 3d printer, User Manual

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7.0 Calibration and Maintenance
7.1.2 Nozzle Height
This routine is used to calibrate the nozzle lift height. As the print head switches
between nozzles, the nozzle which is not printing is lifted up and out of the way of
the print. Therefore the software needs to know the difference in height between
the two nozzles when they are in their printing position.
If you are having problems with layer adhesion or inconsistencies in the height
of the first few layers, this calibration should rectify the problem. There are a
number of things you need to check before starting the calibration sequence:
•
First, remove the ‘tip wipe’ blade in the front left of the bed.
•
Next, remove the PEI bed from Robox® by following the on-screen
instructions.
•
The nozzles are clean with no lumps of filament or degraded material
•
You will need a small sheet of paper for measurement (~50x50mm)
•
A pair of tweezers (included in the accessories box) would be useful for
removing extruded material during the calibration.
When you are ready, click Start to begin. AutoMaker™ will first heat the nozzles
to prevent any solidified extrudate from affecting the calibration. Next, Robox®
will automatically determine the height difference between the two nozzles
by probing the aluminium bed a number of times and obtaining an average
measurement.