SX
™
Service and Maintenance Manual 2-5 960714-02B © 2007 I2407
SECTION 2 – MAINTENANCE AND ADJUSTMENTS
MACHINE ADJUSTMENTS
SX
™
Service and Maintenance Manual 2-5 960714-02B © 2007 I2407
SECTION 2 – MAINTENANCE AND ADJUSTMENTS
MACHINE ADJUSTMENTS
ADJUSTING THE PINCH ROLLER
The pinch roller adjustment is used to control
excess “traveling” of the film to either side of the
pinch roller. This traveling is due to uneven
pressure distributed by the pinch roller onto the
drive roller. This pressure is created by slide-
spring mechanisms on each end of the pinch roller.
Under normal usage, the pinch roller should not
come out of adjustment. Before changing the
factory settings on the pinch roller, be sure to check
the unwind for proper web tension and alignment.
If changing the roll setting does not prevent
traveling, follow these steps to adjust the pinch
roller tension.
1. Open the printhead cradle cover to expose the
printhead components and pinch roller.
2. Confirm the preset adjustment of the pinch
roller. The top of the set screw should be flush
with the top of the hex jam nut. If either side is
not flush, turn the jam nut counter-clockwise to
unlock the set screw. Adjust the set screw to
the proper height, and retighten the jam nut to
lock into place. Close cradle cover, and cycle
machine to check for traveling issues.
3. If the pinch roller adjustment springs are set
correctly and the film still travels, release the
jam nut and turn the set screw opposite the
side the media is pulling towards down in 1/4
turn increments. Lock the jam nut, and check
for traveling. Continue this process until the
bag film feeds out evenly and does not walk to
either side.
Figure 2-4. Pinch Roller Adjustment Screws
Pinch Roller
Adjustment Set Screws
Figure 2-5. Jam Nut and Set Screw
Set Screw and Jam Nut
Flush for Initial Adjustment