Parallelism Adjustment Between The Print Bar And Leaf Spring Load In The Basic Machine - Olivetti PR2 E Service Manual

8.3 PARALLELISM ADJUSTMENT BETWEEN THE PRINT BAR AND LEAF SPRING
LOAD IN THE BASIC MACHINE
MACHINE CONDITION:
Machine powered off and with the case removed.
OBJECTIVE ADJUSTMENT:
Parallelism between the print bar and leaf spring load.
PROCEDURE:
The print bar perpendicularity adjustment lever must be previously adjusted using tool code 9600303
according to drawing code 395130U.
To manually adjust the parallelism between the printhead and print bar, loosen studs (2) and turn
counterclockwise to move the print bar closer to the front of the matrix; turn clockwise, instead, to move
the bar closer to the rear of the matrix.
You can use parallelism indicator (3) to check whether corrections have been made.
To change the load of the spring leaf, turn adjustment nuts (4).
Move the carriage all the way to the left and, using a comparator, with a dynamometer push the print
bar near the probe roller. A displacement of 0.4-0.5 mm must correspond to a load of 280 gr + 20 gr.
Repeat this procedure on the right-hand side of the print bar.
When adjustment is complete, secure using securing nuts (5).
1
3
2
LOADS DETECTED WITH THE COMPARATOR
280 gr + 20 gr 280 gr + 20 gr 280 gr + 20 gr
5 4
Fig. 8-3
8-4 Y100250-4