69
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 Mirror #3
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
M i r r o r # 2 o r M i r r o r # 1 , b e c a u s e a s
i n d i c a t e d b e f o r e , i t w i l l o n l y c r e a t e
misalignment.
1. Open the Lid.
2. Place Thermal Paper: Take a small
piece of thermal paper (approximately
1 inch (25mm) should be plenty) and
place it firmly over the lens.
3. Press the paper down with a finger so
t h a t
a
c i r c l e
a p p e a r s
t h a t
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
u s i n g t h e S p a c e r P u c k o n t h e
Honeycomb Plate.
6. C l o s e t h e L i d a n d t a p * T e s t F i r e *
without removing the paper as it may
be necessary to mark this spot. This is
Spot L1.
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
u n t i l t h e s p o t i s n e a r l y p e r f e c t l y
centered.
a. Note: do not overly tighten Mirror #3.
b. I n r a r e i n s t a n c e s , i t m a y b e
necessary to access the Mirror #3
mounting screws.
c. F u l l y r e m o v e t h e l e n s h o l d e r
assembly by loosening the Laser
Head Knob, Fig. 37.
d. Loosen the two Mirror #3 mounting
screws (Fig. 38) enough to rotate
t h e l e n s i n t h e d i r e c t i o n o f t h e
missing spot. While holding the lens,
retighten. The screws tend to rotate
t h e m i r r o r i n t h e d i r e c t i o n o f
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 Air Assist Nozzle
i s n o t c l i p p i n g t h e l a s e r p a t h a n d
adjust if necessary.
TESTS & ALIGNMENTS
Fig. 37
Fig. 38
Laser Head
Knob
Mounting Screws
Mirror #3
DM 1600A01CX8 08-18 LC40 EN.qxp_LC40 8/17/18 10:32 AM Page 69
