6-6 Service Manual
XZAC4219-05
Adjusting the print bar parallelism and leaf spring load on the basic machine
• MACHINE STATUS
Printer switched off and without casing.
• CONDITIONS TO BE CHECKED
Check print bar parallelism and leaf spring load.
• PROCEDURE
– The bar perpendicularity adjustment lever (1) 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.
Figure 6 - 5 Adjusting the print bar parallelism
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