Paxar 676, User Manual

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Adjustments
Sensor Adjustments:
All the micro switches and optical sensors in your 676 printer were calibrated at the
time your printer was manufactured, however from time to time it may become
necessary to readjust / recalibrate due to the large variety of stocks and inks that can
be run on the machine.
Stock Out
With a full roll of stock loaded on the unwind with the unwind web guides properly
adjusted you should heard the switch click as you raise and lower the roll. If not the
switch bale is adjusted by carefully bending it as needed.
Print Registration Sensor Web Position Adjustment
If you are running sense mark media with a hole or slot for registration the
registration sensor web position must be adjusted for the sense mark media being
run:
1) Open the feed roller and print stations.
2) Move the stock by hand in the feed direction until the registration hold or slot
desired is in the slot on the sensor funnel over the red LED light bar.
3) Close the feed and those print stations needed for the format.
4) Slide the top sensor assembly using the sensor handle while looking at the sensor
LED on the front panel. When the LED turns on with the registration sensor over
the media in the vicinity of the hole / slot, and stays on, the sensor is over the
registration hole or slot.
If your machine stops, for no apparent reason, while it is in the middle of printing a
batch, you may be missing sense marks (three consecutive tickets in a row in which
a sense mark was not found). Check for the following:
- The front panel will display a screen indicating that there has been a missed
sensor error.
1) Check that the web guides have been positioned properly - both on the unwind
and decurler.
2) Check that the feed roller pressure has been set equally across the roller.
3) Check that the feed roller pressure has been set to pull 11 inches of media
properly.
4) Compare the actual feed length of the sense mark stock being run with the feed
length set in the format.
5) Repeat the sensor alignment procedure.
Print Registration Sensor Rotation Alignment
The optical sensor for the light from the LED bar for stock registration is mounted
on a square shaft directly above the web plate assembly, just prior to the first print
station. Although this bar is factory adjusted prior to shipment, it may become
necessary to readjust the bar to assure proper light reception if after following the
previous procedure the missed sense mark error continues to occur.
1) Remove the stock from the machine.