Bell System Practices Plant Series Adjustments page 73

2. 71
LETTERS PRINT INDICATOR
(TOP VIEW)
(B) PRINTING HAMMER STOP BRACKET
(l}f
OR UNITS WITH THICK TYPEBOX AND
DUMMY TYPE PALLETS USE CORRESPONDING
STANDARD ADJUSTMENT EXCEPT CLEARANCE
BETWEEN PRINTING HAMMER AND DUMMY
TYPE PALLET SHOULD BE
MIN. SOME--- MAX.
FOR UNITS WITH THIN TYPEBOX- NO
(2)
DUMMY TYPE PALLETS, USE CORRESPOND­
ING STANDARD ADJUSTMENT.
(3}CERTAIN MULTIPLE FORM UNITS WILL
REQUIRE A REFINEMENT OF STANDARD
ADJUSTMENT FOR THE STOP BRACKET TO
MIN. INCH- -- MAX. 0.0151NCH
0.005
(C) RIGHT MARGIN
FOR UNITS WITH LIMITED ADJUST-
MENT SPACING DRUM, USE CORRES­
PONDING STANDARD ADJUSTMENT.
(2) FOR UNITS WITH UNIVERSAL SPACING
DRUM, USE CORRESPONDING STANDARD
ADJUSTMENT.
(D) PRINTING CARRIAGE POSITION
USE PAR.
(E) TYPE BOX ALIGNMENT
USE PAR. 2.51
FOLLOWING THIS ADJUSTMENT, ALL
SCREWS SHOULD BE TIGHTENED.
0.020 INCH
SPACING DRUM RATCHET WHEEL
CARRIAGE RETURN RING
2.47
ISS 7, SECTION 573-115-700
(A) LEFT MARGIN
REQUIREMENT
TYPE BOX CLUTCH DISENGAGED,
SPACING DRUM FULLY RETURNED, AND
TYPE BOX SHIFTED TO LETTERS POSITION:
CLEARANCE BETWEEN CENTER OF LETTERS
PRINT INDICATOR ON TYPE BOX AND
CENTER LINE OF SPROCKET PINS AT LEFT
HUB SHOULD BE:
MIN. INCH --- MAX.
5/16
TO ADJUST --- POSITION CARRIAGE RETURN
RING WITH .ITS MOUNTING SCREWS
LOOSENED.
SPACING CLUTCH DISENGAGED, FRONT
(2)
SPACING FEED PAWL IN ITS FARTHEST
ADVANCED POSITION, SPACING DRUM
FULLY RETURNED, AND PLAY IN
SPACING GEAR (PAR.
UP- CLOCKWISE: CLEARANCE BETWEEN
PAWL AND SHOULDER OF R.A.TCHET W HEEL
TOOTH IMMEDIATELY AHEAD:
MIN. SOME --- MAX.
THE REAR PAWL WHEN FARTHEST ADVANCED
SHOULD DROP INTO THE INDENTATION
BETWEEN RATCHET WHEEL TEETH AND SHOULD
BOTTOM FIRMLY IN NOTCH.
TO ADJUST - - - REFINE REQUIREMENT
(FRONT VIEW)
UNIVERSAL
SPACING
DRUM
INCH
7/16
2.24) TAKEN
0.008 INCH
•
ABOVE
(1)
Page 73