Cam Follower Assembly - IBM 1402 Reference Manual

installed between first and second intermit-
tent rolls; one to rear of punch transport; one
to front.
b. Raise lowering frame until just snug. The
surface of plates is now on card line.
c. Remove die from punch unit.
d. Back adjusting bushings of punch unit into
top plate. Place punch unit in machine so
stripper rests on adjusting plates.
e. Adjust bushings to 'square-up' punch unit in
machine. Use gage 610692. Make sure all four
bushings touch machine side frames while
stripper rests on adjusting plates. Tighten
bushing lock nuts.
f. Remove punch unit and adjusting plates.
g. Replace punch unit and secure with four
mounting screws. Bottom surface of stripper
is now on card line.
h. Install die in machine.
i.
Time punch unit; refer to Punch Unit, Timing.
j. When lowering frame is completely up, punch
a few cards and check registration. Correct
if needed. See Punch Unit, Adjustment, Steps
2 and 3.
k. Machine is now ready for operation. If neces-
sary to feed cards through punch transport
with punch unit removed, use die
~ard
gage
610094 as lower card guide in punch station.
Gage is installed from top of transport.
2. Level side frame machines: (See illustration B.)
A
NOTE: Punch unit installed on this type side
frame requires four, half-inch, hex-head bushings
610093 in top plate. See Figure 3-31.
a.. Remove die from punch unit.
b. Place punch unit in frame and secure with
four 1
~"
screws.
c. Install die in machine.
d. Time punch unit. See Punch Unit, Timing.
STEPPED SIDE
FRAMES
e. Raise lowering frame to operating position;
punch a few cards; check registration, and
correct if needed. See Punch Unit, Adiust-
ment, Steps 2 and 3.
f. Machine is now ready for operation. If nec- .
essary to feed cards through punch transport
with punch unit removed, use die card guide
gage 610094 as lower card guide in punch
station. The gage is installed from top of
transport.
Cam Follower Assembly
SERVICE CHECKS
These checks are made with cam follower removed
from punch unit.
1. Four collars on pivot shaft should be tight against
inner race of pivot bearings. See Figure 3-32.
2. Set screw holding cam follower pivot shaft, inter-
poser bail pivot studs, and interposer setup bail
pivot shaft should be tight.
3. Nuts on all cam follower bearing shafts and in-
terposer setup bail pivot studs should be tight.
4. Check for wear, fretting corrosion, or lack of lu-
brication.
ADJUSTMENTS
1. Remove punch unit from machine.
2. With punch unit at room temperature, adjust so a
.002" feeler gage (placed between the cam fol-
lower bearings listed below and their respective
cam surfaces) experiences moderate drag at
tightest point as cam shaft is rotated through one
revolution. See Figure 3-33.
a. Punch bail complementary (top-inside) cam
follower bearings.
b. Setup bail complementary (top-outside) cam
follower bearings:
c. Punch bail active (bottom-inside) cam fol-
lower bearings.
NOTE: This adjustment does not apply to setup
bail active (bottom-outside ) cam follower
bearings, because the 80 latch springs force
these cam follower bearings to ride tight
against their cam surfaces.
3. With cam follower bearings adjusted to .002"
feeler gage, check that a .005" feeler gage will not
pass freely between any cam follower bearing and
its respective cam surface at any point around
the cam circumference. If this .()()5" adjustment
cannot be met, check to see that punch marks
on the eccentric studs are up. The eccentric studs
can be interchanged by mistake and the punch
marks would be down. This would make proper
3-25