Table of Contents
Advertisement
PRINT HEAD
&
ASSOC. ASS
(Y
Note
The following adjustments must be made
to simulate correctly aligned lamp
(GE-379)
so
that when adjustments are
final, the lamp
(42)
is inserted and
this light source is then directed
properly through the timing fence (27)
to slit on fibre optic head
(8)
(Fig.
5-23).
(c) Adjust front face of fibre optics head so that it is
physically parallel with timing fence and as close to
fence without touching (Fig. 5-23).
(1) If face of optics head is not parallel with re-
spect to the vertically suspended timing fence,
physically bend the bracket (47) slightly up or
down to maintain vertical parallelism. Tighten
screws
(6)
on optic head (8).
(2) Move print head by hand along front and rear guide
bars (25, 21) all the way to the right and back
to starting position to ensure that timing
fence and the face of the fibre optic head surfaces
do not touch each other.
(3)
If surfaces are contacting, re-check timing
fence alinement at para. 5.2.2.3.A.
4. Sighting Through Lamp Housing (43)
(a) From a position in front of flexible timing fence, and
with fibre optic bundle pointing to a light source,
sight through lamp housing timing and observe
illuminated slit on optics head (8) on other side of
fence.
When sighting, make sure light slit is
~om
pletely blocked by any black line on the
timin~
fence
(See Fig. 5-24/A) (adjust by carriage movement).
(b)
(c)
(d)
The following two conditions may apply to
the illumination in previous step 4.(a)
when the slit on optics head is out of
alinement with respect to the black line
on timing fence (Fig. 5-24, A).
If the bracket (and board, 47, 26) holding the optics
head is too high on right (Figure 5-24,
B),
tap bracket
to aline slit and black line as shown in Figure 5-24, A).
If the bracket holding the optics bundle is too high
on the right (Fig. 5-24, C), tap bracket to aline
slit and black line as shown in Fig. 5-18, A).
When correct alinement has been attained, tighten and
secure bracket (47) with the two mounting screws and
washers (Fig. 8-19/28, 29,
30)
to printer carriage (24).
5-49
Rev. E
Advertisement
Table of Contents
