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B
Disessembling
and checking
punch solenoid
Remove
retaining
screw
D for the solenoid(s)
that
are
to be checked,
See Fig.
in section
A.
Loosen
screws
E.
Unhook
spring
F and press
out solenoid
arma-
ture G,
Check
that the spring
attachments
are not de-
defective.
Remedy:
Replace
the spring
attachment.
Check that the axial play does not exceed
0.02mm.
Remedy:
Replace
solenoid
armature.
Check that the actuator rotates easily and
that
it does
not bind when depressed.
Remedy:
Replace
solenoid
armature.
Check That the spring eyes F are not defective.
—>jr
Using feeler gauge
(
II,
check
that
the
play between
the
punch
pins and the
punch
pin drivers
is less than 0.15mm.
Remedy: Replace
punch pin drivers
having excessive
play and defective
punch
pin drivers.
D
Replacing
punch pin drivers
2,
i err
0.05 -0.1 mm
Loosen
stop screws
K for the punch pin driver
shaft
and press
out the shaft.
These
stop
screws
are
eccessible
after
bracket
L has
been
removed.
Replace the punch pin driver.
Press
in the punch pin driver
shaft,
tighten
stop screws
K and replace
bracket
L.
11
E
Fitting
and adjusting
punch solenoid
11
12
13
Screw the punch solenoid
onto the punch/
feed
unit.
Make sure
that the pin on the
actuator
fits
into punch pin driver J.
See Fig.
in section
D).
Adjust
the solenoid
armature
axially in the
solenoid
until
there
is a clearance
of 0.05-
0.1mm
between
the punch pin driver
and the
adjacent
actuator.
Connect
a DC voltage to the solenoid
coil
and adjust so that a current
of 1.0A - 5% runs
through
the coil.
Turn the solenoid
core
using a screwdriver
until the actuator
just leaves
its resting
position
on the O-rings.
Tighten
screws
I.
Adjust the DC voltage connected to the solenoid
coil so that
a current
of 2A — 5% runs
through
the coil.
Check
that
the actuator
turns
through
its
full
stroke
and contacts
the O-rings.
(A very
small
clearance
between
actuator
and O-rings
is per-
missible),
Use your
finger to press
the actuator
back
from
the O-rings.
If properly adjusted
you should
feed an abrupt
reduction
in force as the actu-
ator
is pressed back to its initial
position.
Remedy:
Loosen
screws
I and repeat
from step
Es sith the adjustment
position
slightly changed.
Note:
When testing with current
flowing
as in
coil will
not overheat.
A stabilized
DC power
supply that provides
0 -
+6V and 2A is recommended.
Check the axial play as instructed
in E2. If
adjustment
is necessary,
E3 to E8 must be re-
checked.
Tighten screws
I.
Insert
a piece of 0.1mm
paper
tape between
the punch pin guide and the die.
Insert
feeler
gauge
III between
the actua-
tor and the O-rings.
Use the 1.85mm
end of
the gauge
for data tracks
and the 2.0mm
end
for the feed hole track.
Adjust the longitudinal
position of the sole-
noid
until
punch pin presses
the tape lightly
against
the die without
cutting
into the tape.
Move
feeler
gauge
III lightly back and
forth
as adjustment
proceeds,
to achieve
a stabel
position
against
the O-rings.
Lift the pinch
roller
and
check
by moving
the tape back
and forth.
Tighten
the punch
solenoid
retaining
screw.
Re- check the adjustment
as instructed
in
step
E7.
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