IBM 29 CARD PUNCH Maintenance Manual page 62

Hide thumbs Also See for 29 CARD PUNCH:
Table of Contents

Advertisement

Vertical Drive
Studs.
*Slotted clip replaces knurled thumb screw
on
later machines.
Figure 4-45. Vertical Drive Rod Assembly
6. Hook up the horizontal shift spring and turn the
horizontal adjusting screw (on left from front of
machine) until the code plate aligning rods are free.
7.
Restore tension to the vertical shift spring and tighten
the knurled screw into the groove in the vertical drive
rod. Turn the vertical adjusting screw until the code
plate aligning tools are free.
8. Remove the aligning tools.
Figures 4 4 6 and 4 4 7 show wires used for printing each
character; they can be used to determine when extra wires
are being picked up during printing. If extra wires are
printed, refine the code plate alignment (without code plate
stops) as follows:
1. Position the code plate with the aligning tool, as done in
preceding steps, and tighten the locking screws.
2.
Adjust the vertical position of the code plate by printing
an 8. Loosen-the vertical locking screw, and turn the
vertical adjusting screw clockwise until unwanted dots
appear. Mark this position. Turn adjusting screw
counterclockwise past a clear 8 until unwanted dots
reappear. Mark this position. Turn adjusting screw to a
point midway between these two positions and tighten
the locking screw.
3. Adjust the horizontal position of the code plate by
printing a 6 . Loosen the horizontal locking screw and
turn the horizontal adjusting screw clockwise until
unwanted dots appear. Mark this position. Turn ad-
justing screw counterclockwise past a clear 6, until
unwanted dots reappear. Mark this position. Turn the
adjusting screw to a point midway between these two
positions and tighten the locking screw.
4.
Check to see that the code plate is in true alignment
with the vertical rows of print wires. Loosen the
horizontal locking screw. While printing a 3, slowly turn
the adjusting screw counterclockwise. If alignment is
true, all dots will disappear simultaneously because the
code plate is being moved to its neutral position. If a
corner of the number disappears first, readjust the
vertical guide-plate bracket using the aligning tool. If this
is done, it will be necessary to repeat steps
2
and 3.
4.1 1.2.4 Code Plate Stops
1 . Adjust the bracket so that the horizontal stop clears the
stud on the horizontal shift lever, and the vertical stop is
parallel to the end of the stud on the vertical shift lever.
Tighten the screws.
2.
Turn both adjustablt stops to get clearance between
stops and studs of 118 inch in the plus direction. The
stud is then nearly centered between stops.
3. Unhook the heavy spring to the print cam follower. Set
punch index at 133 degrees.
4. Remove the cover from punch extensions and manually
push punch 6 to the extreme upward position. Turn the
adjustable stop to just touch the horizontal shift lever
stud. Tighten the locking nut.
5. To adjust the vertical stop, manually push punch 8 to
the extreme upward position. Turn the adjustable stop
to just touch the vertical shift lever stud. Tighten the
locking nut.
29 F E M M
(4169)
4-31

Advertisement

Table of Contents
loading

Table of Contents