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Before you perform calibration, first check if new firmware is available and install this. Observe chapter "12. Software and
firmware installation" and chapter "20. Firmware update with the Arduino
TM
IDE". The update to the new version may cause
data of the heat bed scan to be deleted. To check this, just read out the data with the command "M3013", as described in
chapter "19. a) Determining the highest position of the printing plate". If this shows a matrix, it has not been deleted.
Calibration should be performed now and then. It is a prerequisite for high printing quality. In any case, calibrate after transporting
the 3D printer, changing the heating plate or updating the firmware.
The figures on the display screens may vary a little depending on firmware version.
The subsequent destruction is based on the dual extruder version. For owners of the single extruder printer, however, this is nearly
identical.
For the finished devices, the complete calibration incl. a heat bed scan "
Scan PLA
" has already been performed. Therefore, the "
basic settings
of the upper Z-limit switch (Z-min.; light barrier)"
should fit already. The settings of the left extruder and the heat bed scan must be repeated
several times and the heat bed scan must be performed again anyway after each transport. This requires "
determination of the position with
the smallest distance
" once as well. Owners of the construction kit perform the calibration completely.
In the heat bed scans "
Scan PLA
" and "
Scan ABS
", everything is done automatically after "
Setting the distance between the nozzle and
the printing plate
", except for alignment of the other extruder. This means that the printer will heat up to the accordingly needed temperatures
automatically and will determine the distance between the nozzle and the printing plate at printing temperature automatically. The determined
offset is automatically considered in all future printouts. The Z-offset in the firmware menu or via the command "
M3006
" in the G-code can be
0 in most cases.
The heat bed scan via "
Scan
" is faster because it is performed at lower temperatures and the firmware therefore does not have to wait until the
PLA or ABS temperatures are reached. Possible changes to the distance between the printing plate and the extruder due to changed tempera-
tures when printing cannot be considered by the firmware. Therefore, the corresponding Z-offset can be determined manually and then set in
the firmware menu or via the command "
M3006
" in the G-code.
The Z-matrix determined by the heat bed scan can store up to 9 different memory slots. The active Z-matrix can be selected via the "
Set Z-
Matrix
" menu and the command "
M3009
" in the G-code. This means that the heat bed scan can be performed and saved separately for different
materials and/or Slicer settings. Before starting printing, the respective optimal Z-matrix can be loaded and used for Z-compensation.
However, observe that using more than one matrix may require manual correction of the Z-offset value again, since the calibration changes the
position of the two extruders mechanically.
