User manual IBM 29 CARD PUNCH MAINTENANCE MANUAL

[. . . ] S225-3357-3 This Supplement No. SS23-4069 Novomber 23, 1970 Previous Supplement Nos. None IBM FIELD ENGINEERING MAINTENANCE MANUAL IBM 29 CARD PUNCH @IBM Corp. 1965, 1969 Pages to be inserted and/or removed are: Title Page, Preface iii through vi 1-9, 1-10 2-3, blank 3-1, 3-2 , 4-1 through 4-12 4-17 through 4-22 4-29, 4-30 4-35 through 4-41, blank X-1 through X-5, blank 3-5, 3-6 A change to the text is indicated by a vertical line to the left of the change; a changed o r added illustration is denoted by the symbol to the left of the caption. Summary of Amendments Maintenance Manual addition to list in Preface Additional troubleshooting aids in Chapter 1 Lubrication changes in Chapter 3 Checkout procedure change in Chapter 2 Adjustment tolerance changes in Chapter 4 Figure 4-41 changed to improve figure-to-component association Note: - Please file this cover letter a t the back of the manual to provide a record of changes. IBM Corporation, Product Publications, P. [. . . ] Reinstall the contact assemblies and adjust their mounting brackets for 0. 017-inch contact gap with all armatures restored. 1. Unhook print drive spring (Figure 4-22) and trip punch clutch armature to prevent damage to it. Hold index and remove screw with left-hand threads from end of punch shaft. Unscrew grease fitting from mounting plug. Note: The next step requires realigning the code plate when reassembling. Loosen knurled thumb screw or remove slotted clip on vertical drive rod to relieve tension and remove vertical drive rod guide plate. Disengage the print rod from the print arm (Figure 4-22) by applying slight pressure on drive rod at lower end. Loosen screws in front mounting plug enough to permit disengaging the plug. Shake drive unit up and down (bed in vertical position) to free mounting plugs. Before reinstalling drive unit, manually push punch extensions in as far as possible. Loosen setscrew in reduction housing gear hub and pull out flexible drive shaft. Use unused position of cable clamp to hold cable out of the way. 29 FEMM (11170) 4-11 S225-3357-3 FES: SS23-4069 Rear Grooves should meet Spring Figure 4-22. On reassembly, tighten these screws after punch drive unit is fastened into position with links extended. Loosen the screws in front mounting plug enough to permit disengaging the plug. Shake drive unit up and down (bed in vertical position) to free mounting plugs. Before replacing the unit, be sure all punch interposers are resting in the center of the armature slots. It is easier to re-engage the punch operating arms with the punch extensions if they are pushed in flush with the lower guide plate. Figure 4-23. Punch Clutch Magnet 4. 6. 8 Punch Clutch Service Check 4. 6. 7 Clutch Magnet Adjustment I 1. Position the core with shims (part 305271) for 0. 006-inch to 0. 012-inch clearance between armature and core with armature attracted (Figure 4-23). Attract the armature and pivot magnet assembly around its support bracket to obtain 0. 003-inch to 0. 005-inch unlatching clearance to the step on the sleeve. Sleeve Latching Surface Lead Distance: 1. Trip the armature and check the outer-sleeve lead distance; it should be 118 inch to 3/16 inch. Punch clutch lockup is possible if 3116-inch outer-sleeve lead distance is exceeded. While the clutch is unlatched, turn the drive pulley forward (do not use the index wheel) until the outer sleeve hits the armature and the index stops. [. . . ] All of the electrical components are mounted on the front side of the standard SMS card form. Connections to the components are made on the back side of the SMS card form by printed wiring pattcrns that terminate at contacts at the bottom of the card. These contacts, labeled A through R, couple the signal and standard service voltages to the circuit components when the card is inserted in the SMS socket. The printed wiring (land pattern) depends on the circuit configuration of the card. [. . . ]