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U
Checking
stepper motor
pulling
force
Remove
spring-mounted
tape guide and screw
spe-
cial tool XII
in place
as shown
in Fig.
Load the punch with a piece of paper
tape and
run
the tape through
gap A on
the special
tool.
Depress
the TAPE
FEED button.
Increase
the
friction
on the tape by screwing
in screw
B,
Release
the TAPE
FEED button
when the friction
becomes
so
high that
the stepper
motor
is un-
able to feed the tape without
missing
a step
accasionally.
Cut off the tape at the tape lifter.
Bend
over
the end of the tape and make a hole
for the
dial-type
spring
tension
gauge.
Lift
aside the pinch roller
by pressing
arm C
and insert
the tip of the spring
tension
gauge
into the hole
in the
folded-over
tape end.
Move the spring
tension
gauge
perpendicularly
to the tape in the direction
shown by the arrow.
Read the spring
tension
gauge
when
the pulling
force
it exerts
is sufficient
to
just about
cancel
out the
friction
at special
tool
XII.
The reading
shall
be at least
1.96N
(200gf).
Screw the spring-mounted
tape guide in place
and adjust as instructed
in step SI.
Checking
punching
action
Load the punch with
a coil of tape and connect
it to mains
via a variable
auto-transformer
set
to the rated
voltage.
Run the punch via
a data
generator
(75 charac-
ters
per second)
so that
holes
are
punched
in
all tracks.
Slowly lower
the output
voltage
from
the vari-
able auto-transformer
until
the DC voltage
is
shout
off.
Check that holes are punched
fully in all
tracks
on the tape.
Note: The CODE HOLE
button
does
not provide
Dt voltage
shutoff.
V
Checking
inter-row
spacing
SO Characters =127mm =S inches
ea
-0.5% +0.5%
Position
a punched
tape on the template
so that
the centre
of a feed
hole coincides
with the
leftmost
virtical
line on the template
and one
of the horizontal
track
lines.
Check that the centres
of the feed track
holes
-
from the leftmost
to the rightmost
vertical
line - are directly above the track
line.
Check
that
one vertical
line
is visible
in every
feed
hole.
The
inter-row
spacing
is indicated
by the right-
most
vertical
line.
The max
permissible
devia-
tion is = 0.5%.
Checking
tape check
functions
Move
the sensor
arm
(e in subfig
D in Fig.
3)
toward
the centre
of the supply
flange.
Check that the TAPE LOW lamp lights
just before
the sensor
arm reaches
the hub of the supply
flange.
Load the punch with a coil of tape.
Run the punch with
a data
genereator
and move
the surge
takeup
arm
to its two
end
positions.
Check
that
the punch
stops
and that
the ERROR
lamp lights.
See section 4.2.2.4,
Mark
character
Depress
the CODE HOLES button
and check that
the programmed mark character
is punched
into
the tape.
See section 4.3.3.4.
Depress
the FEED HOLES
button
and check
that
blank
tape (only the feed
hole punched)
is ob-
tained.
Depress
the TAPE FEED button
and check that
virgin
tape is obtained.
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