Diagraph PA/4000, Руководство по обслуживанию, Страница: 184 / 213

Technician’s Guide 2-46
6. Locate the bearing mount bracket and loosen the three screws that secure it to the
PA/4000. Do not remove the screws.
7. By applying pressure to the bracket, the supply hub can be repositioned so that
there is no rippling or bagging in the ribbon as it comes from the supply hub. The
ribbon should also be adjusted in this manner so that tension is even across the
entire width of the ribbon. Notice that tightening or loosening the set screw,
located on the top edge of the bracket, lifts and drops the outside end of the supply
hub.
8. Once the bracket is positioned properly, tighten the three screws located in the
side of the bracket. Then re-check the positioning of the supply hub and make
certain that the ribbon tension is even across the entire width of the ribbon.
9. Feed three or four labels and observe the ribbon as it comes from the supply hub.
Again, there should be no wrinkles evident.
10. Next, feed the ribbon and paper out the front of the PA/4000 together and check
the ribbon for drifting to one side away from the paper stock. If the ribbon
overlaps one edge of the paper stock, the ribbon and paper are not following the
same path. In this case, the paper tracking may need to be re-adjusted. If there is
no ribbon overlap, go on to Step 11.
11. To adjust the standoff you must loosen the left screw (on the component side of
the PA/4000), then adjust the set screw for proper tracking. If the PA/4000 is a
ribbon saver unit, make this adjustment by loosening the two screws at the end of
the extrusion and then adjusting the pinch roller.
12. Secure the ribbon to the ribbon rewind and advance several labels.
13. Check for rippling in the ribbon as it travels from the printhead to the rewind. If
there is rippling evident, the ribbon shield needs to be adjusted as described in
Step 14 below. If the ribbon has even tension across the entire width, no further
ribbon adjustment is necessary.
14. To adjust the ribbon shield: Move the ribbon temporarily and loosen the screw
located on the left end of the shield. This end of the shield can then be adjusted up
or down to even the ribbon tension across the full width of the ribbon.
15. Continue feeding labels. If necessary, go back to Step 14 and re-adjust the ribbon
shield to prevent any rippling of the ribbon.
2.4.3 LABEL EDGE SENSOR ADJUSTMENT