9. Now, using a small lens, look carefully at the printed part: seek the point where the “align_line” is precisely in the
middle of the printed “channel”, both in dX and dY sectors.
IF machine is OK, the line should be at the middle of the channels at DX0 and DY0 positions.
10. If you find the middle alignment to be at other places than 0, then you should take corrective actions:
◦
DX arm (vertical): count
the “Notches” away from
the zero position where
you get the perfect
alignment – if the
position is in the upper
area then you should
ADD the found offset to
the calibration
parameter. If not, you
should SUBTRACT the
found offset from the
calibration parameters
◦
DY arm (horizontal):
same logic as the DX
arm, just remember that
you must subtract if
position found is on the
LEFT of the zero notch
or add if on the right of
the zero notch.
11. Update the offset values – two options:
•
FIRMWARE (preferred) set the machine parameters to get precise performance, letting you use any gcode or
slicer app.
◦
Send the command “M218” to the printer, you will get a reply like the following result
Basically, the machine gives back the XY nozzles displacement. Nozzle #1 is the reference (always 0,0).
In the above example, nozzle #2 is at 0.2,24.1, nozzle #3 is at 0.0,48.0
◦
Lets' say you need to increase 0.1mm both X and Y extruder #2 offsets– you will send (ALL CAPS) the
suitable command: “M218 T1 X0.3 Y24.2”
◦
Machine will acknowledge the command and reply with the updated parameters
36
Fig 43: XY align part – perfect X alignment
Fig. 44: First M218
Fig. 45: Send offset correction
