Adjustment Of Print Bar Parallelism And Leaf Spring Load On Basic Machine (Machines With Serial Number 8.Xxx.xxx) - Olivetti XZAC4219-03 PR2 plus Service Manual

8.5 ADJUSTMENT OF PRINT BAR PARALLELISM AND LEAF SPRING LOAD ON
BASIC MACHINE (MACHINES WITH SERIAL NUMBER 8.xxx.xxx)
MACHINE STATUS:
Machine off without casing.
CONDITIONS TO BE CHECKED:
Check print bar parallelism and leaf spring load.
PROCEDURE:
The bar perpendicularity adjustment lever can be pre-regulated with tool code 9600303 according to drawing
code 395130U.
For manual adjustment of head/print bar parallelism, back off the studs (2) and rotate in a counterclockwise
direction to bring the bar close to the front part of the matrix; rotate in a clockwise direction to bring the bar
close to the rear part of the matrix.
The parallelism indicator (3) can be used to check whether the corrections have been made.
To modify the load of the leaf spring, operate on the self-locking adjustment nuts (4).
Move the carriage completely to the left and, using a comparator, push the print bar close to the feeler roller
with a dynamometer. A load of 350 g ± 20 g must correspond to a movement of 0.35 – 0.45 mm. Repeat the
procedure on the right of the bar.
1 3
2
350 g + 20 g LOADS RECORDED WITH COMPARATOR 350 g + 20 g
4
Figure 8-5
8-6
XZAC4219-03