Backspace - IBM 01 Maintenance Manual

MODEL B4
CUSTOMER ENGINEERING
4. THE LINK FROM THE ACTUATING LEVER to
the cam is to be adjusted so that the back of the lug
on the actuating lever clears the spacebar interposer
by
*4"
as the 3-unit spacebar is depressed (Figure 31).
5. OPERATING LINK. Adjust so that just before the
spacebar cam reaches its high point, when rotated
by hand, it will trip the escapement pawls out of
the escapement rack (Figure 30). This adjustment
should be checked while holding the 3-unit spacebar
depressed. When the operating
link
is properly ad-
justed the interposers will move about
*4"
farther
forward after the last escapement pawl has been
tripped.
BACKSPACE
Adjustments
1. PAWL BLOCK ADJUSTING PLATE. Adjust up
When Type Appears Like This
llJlllJll
Increase Space By Raising Adjusting Plate
I
When Type Appears
Like This
ll1!lll11
Decrease Space By
Lowering Adjusting Plate
When Type Appears Like This
lJllllJll
Decrease Space
By
Raising Adjusting Plate
When Type Appears
Like This
lllllllJl
Increase Space
By
lowering Adjusting
Plote
Figure 32. Pawl Block Adjustment
or down to position the escapement pawls perpen-
dicular to a rack tooth. To check for this condition,
28