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Adjusting print density

Before you begin using the densitometer, ensure that the print contrast (density) of Printer 1 is correct. This density is used to measure and adjust the density of Printer 2. Make any necessary adjustments to the print contrast of Printer 1 so that it is at the correct density. When Printer 1 is printing correctly, proceed with measuring density with the densitometer unit.

Measuring density

To use the densitometer unit, do the following:

  1. Ensure that no print jobs are running.
  2. Disable any attachments.
  3. Select an 11-inch form that matches the forms currently loaded in the printer.
  4. Perform the thread/align procedure.
  5. Ensure that the forms are correctly threaded through the densitometer unit and that the densitometer stand is perfectly aligned with Printer 2 (see Threading the densitometer unit).
  6. Slide the upper sensor towards the front of the unit until it stops against its reference stop. Use the pull chain knob to move the lower sensor.

    For the read position, move the knob so that it aligns with the correct scale position for the appropriate form width. Figure 115 shows the upper sensor (3) and the lower sensor (4) in read positions.

  7. Select Maintenance -> Densitometer.
  8. Select Measure to Save to establish the darkness target.
  9. The Densitometer window changes to show the words Measuring printer densities... and a Cancel pushbutton.

    The printer begins printing the densitometer test pattern for 40 to 60 pages, depending on the configuration and spacing of the printers.

    After one set of test patterns have printed, the printers stop. The optical density of a solid patch for Printer 1 has been set. This establishes the target for future adjustments. This remains set until you run this procedure again.

  10. When the measuring process is done, the Densitometer window appears again in its original form showing the measurement results.
  11. Select Measure/Adjust to adjust the print contrast of Printer 2.
  12. Select OK to leave the Densitometer window and save the new density settings or Cancel to leave the window without saving settings.

When you have completed the density adjustment procedure, return the upper and lower densitometer sensors back to the home position at the rear of the densitometer stand, away from the forms (see Figure 115, items (1) and (2)). Do not leave the sensors in their read positions during normal printing, as this can damage the sensors.