IBM B-1, Adjustment Manual

Page 1: ...I E T CUSTOMER ENGINEERING B 1 ADJUSTMENT MANUAL...

Page 2: ...ETD CUSTOMER ENGINEERING 8 1 ADJUSTMENT MANUAL all n Ogkts to reproduce t Ms matenOal are reserved by IBM...

Page 3: ...CE 19 CARRIAGE 9 CARRIAGE RETURN 32 ESCAPEMENT 4 KEYLEVERS AND CAMS 7 MARGIN RELEASE 13 MARGIN SET 12 MOTOR AND DRIVE 1 OPERATIONAL CAMS 1 8 PAPER FEED 14 RAILS 11 RIBBON 40 RIBBON LIFT o 43 SHIFT 23...

Page 4: ...ts to elimi nate binds If a bind should occur I a slight tapping action on the pulleys with the handle of a screwdriver should produce satisfactory resul ts 1 MODEL B1 ADJUSTMENTS 2 POWER ROLL END PLA...

Page 5: ...ion tends to ti ghten the shaft The deflection of the belt should be approximately 3 8 Fig 4 6 0 Adjust the DRIVE BELT for approximately 3 16 deflection by positioning the motor adiusting screw for wa...

Page 6: ...ter shift or backspace operation 4 Be lt falling off when machine is moved TIGHT BELTS 1 Belt noise 2 Motor vibration transmitted to machine 3 Failure of motor to start extremely tight belts Properly...

Page 7: ...s pring drum 4 ESCAPEMENT 1 The MAIN SPRING tension is adjusted by placing k the loop of the carriage tension tape on various lugs of the spring drum Fig 7 Carriage tension should be checked from the...

Page 8: ...ing the plate up or down Fig 12 The locking screw is more accessable if the basket is in lower case and the universal bar held to the rear Be sure to tighten locking screw after adjusting Check by usi...

Page 9: ...ADJUSTMENTS 6 ESCAPEMENT 4 Adjust TRIP LINK to trip escapement pawl wherl any typeface is 3 8 1 8 from the platen Fig 13 Early tripping will cause type piling due to late restoring of escapement pawl...

Page 10: ...not loosen both screws on either end as this will allow the support to lose all adjustment Check for proper tripping with several keylevers at both en d s of the keyboard If with correct tripping som...

Page 11: ...ill not trip and re store with the majority are ad iusted individually by the adjusting lugs on each keylever 8 The KEYPLATE is positioned so that the keybuttons are free of binds and that 2 3 to 3 4...

Page 12: ...ht 3 Position the PLATEN RETAINING PLATES to hold the platen guide shaft eccentrics tightly against the platen adjusting plates Fig 22 The multiple copy control lever must be for ward 9 MODEL B1 ADJUS...

Page 13: ...Fig 23 Check RING AND CYLINDER with a single sheet of bond paper in the machine I and the ribbon in operating position Hold a typebar in lower case position against the ring with a strip of bond paper...

Page 14: ...the carriage with the carriage in any position With the rails too tight the carriage rollers will develop flat spots the rails will wear more rapidly and the carriage will bind or be sluggish If the r...

Page 15: ...k nut must be adjusted to remove all side movement of the set lever without binding the set lever The hairpin spring must reliably restore the set lever Fig 29 12 MARGIN SET 1 Adjust the MARGIN SET BR...

Page 16: ...un lock the key lever do Push down and hold a letter keylever e Push forward on the push rod until it stops f Match the pin in the push rod clevis with the hole in the lower line lock bellcrank This a...

Page 17: ...nd the platen the front feed ro lls have a sl ight amount of drag on the platen If five IBM cards are inserted the front feed rolls should be free to turn Fig 34 2 Support LUGS Form the lugs on the re...

Page 18: ...d roll tension s pring The screw plate should be centered before making this adjustment 5 INDICATOR POINTER Center the pointer with re pect to the type bar guide throat Fig 39 Do thi s by loose ning t...

Page 19: ...ar paper table is not touching the deflector 16 PAPER FEED 6 FRONT PAPER SCALE Adjust in the following manner a Loosen the collar on the platen guide shaft which positions the front paper scale Fig 40...

Page 20: ...ont paper scale Fig 43 17 MODEL Bl ADJUSTMENTS Adjust by loos e ning the positioning collars on the carriage tie rod and moving the rear paper table Fig 44 Also adjust the paper table to rest evenly o...

Page 21: ...ust OPERATIONAL CAM CLEARANCE for 010 to 0015 from the power roll 0 Adjustable stop screws are used to change operational cam clearance Be sure to loosen lock nut before adjusting stop screws Fig 45 I...

Page 22: ...8 Adjust CAM RE LEASE LINK so the cam repeats when the plugger is depressed 1 16 Repeat cam Fig 50 19 MODEL B1 ADJUSTMENTS 2 Adjust the CAM RELEASE LINK so that the cam is released when the keylever i...

Page 23: ...ing the interlock mounting bracket left to right Fig 51 Adjust so that as the interlock is rotated I it clears the backspace pawl by a minimum clearance 5 Form the BACKSPACE PAWL GUIDE LUG left or rig...

Page 24: ...1 4 travel holds the backspace pawl in the escapement rack and against its stop With the pawl so locked in position the car riage will be stopped and will not coast back an extra space 21 MODEL B1 ADJ...

Page 25: ...ard the front of the machine iust far enough to prevent the clutch from latching during a simul taneous backspace and carriage return operation The clutch will not latch because the bac k spa c e inte...

Page 26: ...ll the paper out and note the amount of drag Check both sides for equal drag Unequal pres sure will bend or break the stop bracket that is being used Be sure to retighten the lock nuts 3 Adjust CAM CL...

Page 27: ...N CLEARANCE by moving the toggle brackets up or down with the toggle bracket screws Fig 61 The pusher to pin clearance must be the same for both positions The amount of pin clear ance at this point is...

Page 28: ...for easy unlocking with both shift key buttons Loos e n locking stud only slightly when adjusting the bracket 25 MODEL B1 ADJUSTMENTS 7 Adjust the OPERATING LINK so that the pusher clears the pin by 1...

Page 29: ...eleased when the keylever is depr ssed 2 3 of its trave I Check this adjustment by slowly moving the tab lever to the rear The carriage must be held as the escapement pawl will be held out of the esca...

Page 30: ...pement pawl due to early tab unlatching o Excessive overthrow of the latch CAN cause failure of tab to unlatch or a bouncing sound as the check lever stops the carriage fA correctly adjusted and opera...

Page 31: ...010 to 015 overthrow The oper ating link must not prevent tab lever from re storing against the rear rail Be sure the over throw stop does not limit the travel of t he tab lever under hand operation...

Page 32: ...eara nce will allow the carriage to re bound a nd c ome to rest one space before the tab stop Insufficie nt clearance c a n pre vent tab lever from restoring and resulting in carriage lock up 11 Form...

Page 33: ...g screws for a maximum of 005 backlash between the pinion gear and the main spring drum gear o Check full length of the carriage Fig 77 b Adjust the collar on the governor shaft for 003 to 005 end pla...

Page 34: ...ed of carriage return Fig 80 Check the speed by clearing all tab stops ex cept the last one on the right Operate the car riage return and tab several times to determine this speed 16 Adjust the TAB GO...

Page 35: ...essed 1 1611 See Fig 50 The release link should be in the rear hole in the keylever and lower hole in the release lever 4 Adjust the REAR CLUTCH LEVER LINK so that the slot in the clutch lever bellcra...

Page 36: ...n rack Do not bow the carriage end plates 8 Adjust the PAWL RELEASE LEVER ECCENTRIC so that the right side of the ear on the pawl release lever lust clears the intermediate pawl release lever when all...

Page 37: ...adjustable overthrow stops for the carriage release levers Position the washers front or rear so that when either carriage release lever is fully de pressed there will be a clearance of about 010 bet...

Page 38: ...he clutch latch surface See adjustment 12 for pidure of eccentric stop 15 Adjust the PAWL RELEASE LINK so that with the clutch latched the escapement pawl wi II clear the escape ment rack by 1 6411 Se...

Page 39: ...events carriage ock up if the rebound check remains to the rear and car riage return is operated CARRIAGE RETURN 16 0 The REBOUND CHECK INTERLOCK LINK is ad justed so that the interlock lever clears t...

Page 40: ...d quiet operation If an operator finds excessive resistance in pushing the carriage back to the margin re check the air cylinder ports It may be ad vantageous to open the exhaust port slightly 37 MODE...

Page 41: ...e line space mechanism when the detent roller is positioned between two teeth on the platen ratchet Fig 99 Check this by pulling on the carriage re turn tape until the index pawl s trikes the lower st...

Page 42: ...both lobes of the cam and can be done as follows With the power turned OFF I trip the s pace bar cam Rotate the power roll by hand while ob serving the escapement lever moving toward the rear The esc...

Page 43: ...he ribbon lift bail is rotated down Fig 105 A variation in the tripping point between type bars may be caused by a bent or curved rib bon lift bail A variation of 1 4 is accept able 40 RIBBON 1 Adjust...

Page 44: ...reversing point Late reversing will cause excessive wear to ends of ribbon Early reversing can cause the ribbon to reverse before the spool is empty 41 MODEL B1 ADJUSTMENTS 40 Adjust the RIBBON FEED...

Page 45: ...g to the spools Fig 110 The ribbon spool plate must be removed to loosen the retaining spring screws 42 RIBBON 6 Adjust the CHECK PAWLS so that the feed pawl rests half way between two teeth Fig 109 R...

Page 46: ...noting on the ribbon where the type face struck The lift mechanism should be set in the first lift or back position Check at 0 through 1A impres sion setting 43 MODEL B1 ADJUSTMENTS 2 Adjust the RIBB...

Page 47: ...g Do not attempt to adjust the lug until adjustment 2 is correct as any change in center guide clevis will affect ALL ribbon positions NOTE Any binds in the ribbon lift mechan ism will cause erratic r...