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Step 6: Align Axis Lens holder
(z-Axis) using Alignment Laser's
Red Dot.
Centering of the beam on the lens is the
most critical component of alignment.
However, as the distance from M3 to the
lens is very short, it is difficult to make
drastic changes to the position of the
laser spot. Resist the urge to adjust M2
or M1, because as indicated before, it
will only create misalignment.
1. Open the lid.
2. Place Thermal Paper: Take a small
piece of thermal paper (approximately
20 mm should be plenty) and place it
firmly over the lens.
3. Press the paper down with a finger so
that a circle appears that
demonstrates the outer rim of the
lens. Sometimes pencil lead or crayon
will help to show the edges of the lens
and mirrors.
4. Move the Gantry to Position C.
5. Move the lens to its lowest position
using the focus puck on the
honeycomb.
6. Close the lid and tap *Test Fire*
Without removing the paper as it may
be necessary to mark this spot. This is
SpotL1.
7. Tweak the red dot to match the spot
on the paper. Due to the reflections of
all of the mirrors the red dot may not
move with the same screw turns as it
did previously.
8. Adjust Mirror 3 continuing to test fire
until the spot is nearly perfectly
centered.
a. Note: do not overly tighten Mirror 3.
b. In rare instances, it may be
necessary to access the Mirror 3
mounting screws.
c. Fully remove the lens holder
assembly by loosening the
thumbscrew.
d. Loosen the two Mirror 3 mounting
screws enough to rotate the lens in
the direction of the missing shot.
While holding the lens, retighten.
The screws tend to rotate the mirror
in the direction of tightening.
e. Replace lens holder assembly.
9. After the spot is centered rerun the 4
Corners Tests. The spots should now
be nearly on top of each other. Also
be sure to check that the nozzle is not
clipping the laser patch and adjust if
necessary.
TESTS & ALIGNMENTS
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