67
TESTS & ALIGNMENTS
Step 4: Align Axis A-B (Y-Axis)
using Alignment Laser's Red Dot.
Conceptually, you will be aligning the
invisible cutting beam and the Alignment
Laser's visible red dot with the axis of the
shaft from A to B. When the beams are
perfectly parallel with the A-B axis, do
not continue to change Mirror 1. Further
changes to Mirror 1 will then negate the
alignment to the axis.
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 Mirror #2, see figure 38.
3. Press the paper down with a finger so
that a circle appears that
demonstrates the outer rim of Mirror
#2. Sometimes pencil lead or crayon
will help to show the edges of the lens
and mirrors.
4. Move the Gantry to position B, see
figure 32.
5. Close the lid.
6. *Test Fire* Observe where the spot
lands through the lid. Without
removing the paper it may be
necessary to mark this spot. This is
SpotB1.
7. Adjust only the visible red dot to
match the spot.
Do not move the gantry at this time,
and do not adjust Mirror #1 yet. Using
the 2.5mm hex wrench, make micro
adjustments to the three adjustment
screws of the alignment laser, and
position the red dot exactly over the
burn mark at position B on Mirror #2. If
the red beam is not hitting the mirror
at all, it may be necessary to use a
larger card or paper to determine
where the red dot is. Go slowly and do
not overtighten screws. Small turns of
the screws are required to move the
beam at long distances. It is best to
align the red dot at the furthest
distances B and C to avoid small angle
issues introduced at A or D.
8. Without removing the paper, move the
gantry to A.
9. *Test Fire*. If possible change position
to see if the test fire lands on the
thermal paper without opening the lid.
If it is not possible it may be necessary
to use the suggested marks in step 6.
This is SpotA1
a. If the two marks are exactly on top
of each other,
i. then the Y axis is aligned. Do not
make any more changes to M1
ii. Move on to B-C X axis alignment.
10. If the 2 dots are not on top of each
other at A and B, continue as follows:
a. Move the head back to position B.
b. Note that the red dot can now be
used to predict where the next
laser fire shots will be if it is
aligned as in 7a.
c. While at position B, slowly adjust
Mirror 1. Not the red dot! See Note
Z above.
d. Change the mirror so that the red
dot moves halfway toward spotA1.
e. Leave the gantry at B, Close the lid
and tap *Test Fire*.
f. The new SpotB2 should have
moved toward SpotA1 and match
the red dot.
Adjustment
Screws
Thermal
Paper
Mirror #2
Fig. 38
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