Card Guide Adjustments - IBM 29 Card Punch Field Engineering Maintenance Manual

Gram gage blade
Card in bed
must rest squarely
on center of lip
Form Here ——
Figure 4-7. Pressure Rail Adjustment
2. Hold assembly at the same angle it has in the machine
(45 degrees) and form operating strap to a contactair
gap of 0.015 inch to 0.020 inch (Figure 4-8).
3. Form stationary strap for minimum contact rise of
0.025 inch with 23-gram to 31-gram (27-gram to
35-gram for master station) pressure applied at center of
lip on rail.
4. Install assembly in machine and recheck adjustment by
registering a card.
4.5.5.3 Pressure Rail With Microswitch
Microswitch card levers in the detail station right-hand
pressure rail position and the master station left-hand
pressure rail position are adjusted at the factory to transfer
within the correct gram tension range. Replacement of the
entire pressure rail and switch assembly is recommended
when any part is faulty. To install the microswitch
assembly:
1. Position the assembly vertically to provide 23-gram to
31-gram (27-gram to 35-gram for master station) pres-
sure against the card. The contact should be transferred.
4-6 (4/69)
2. Remove the card and check that the contact returns to
its normal position.
4.5.6 Card Guide Adjustments
4.5.6.1 Detail Station
Loosen card guide holding screws and position card guide
for 0.020-inch to 0.024-inch clearance to detail card bed
(Figure 4-9).
0.015" to 0.020"
Figure 4-8. Pressure Rail — Card-Lever Contact
Detail Station Card Guide
(dotted line shows later style)
0.020" to 0.024"
Figure 4-9. Card Guide — Detail Station
4.5.6.2 Master Station
Position master station card guide to obtain 0.013-inch to
0.017-inch clearance to center bed plate at point closest to
eject unit (Figure 4-10).
Master Station Card Guide
7
4
0.013"t00.017" Card Bed
Figure 4-10. Card Guide — Master Station