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HP DraftMaster I, II, SX, RX and MX Plotters - Plotter Calibration


This document is procedurally different for the HP DraftMaster Plus series plotters.
ISSUE: When, and how, to calibrate an HP DraftMaster I, II, SX, RX, or MX plotter.
SOLUTION:Calibrating makes the plotter's drawing characteristics as accurate as possible.
  • Plotter parts have been changed (pinch wheels, for example).
  • The plotter has been subjected to physical stress.
  • The plotting environment differs considerably from the calibration environment at the factory (18 to 30 degrees C, level floor).
The plotter is calibrated at the factory using E-size (AO) polyester film and a black drafting pen. If it is re-calibrated with another pen/media combination, this will result in different calibration constants being stored in and used by the plotter. For best results, re-calibrate using the pen/media combination that you use when your need for precision is greatest.
How to calibrate
  1. Turn the plotter off.
  2. Load a black drafting pen in stall 8 of the pen carousel. Make sure the pen is in good operating condition and has a tip size of 0.35 or greater.
  3. Load a sheet of E or D size polyester film in the plotter. Handle the film by the edges so as not to get fingerprints on it. Take care to accurately align the left pinch wheel with the left edge of the media.
  4. Press PEN SELECT button 8 while turning on the plotter to begin the procedure.
  5. Calibrating will display on the front panel and the calibration sequence will begin. The pen holder will move across the platen. Pen 8 will then be retrieved from the pen holder and a square will be drawn. When this process is complete, the plotter will display Cut page, rotate 90 degrees.
  6. Raise the plotter's carriage cover. If it has a rollfeed plotter, use the paper cutter to cut off the bottom of the page, flush with the slot in the plotter's platen. (If it does not have a paper cutter, use a sharp blade or another cutting device.)
  7. Pull the paper-loading lever towards you to raise the pinch wheels. Remove the media from the plotter. Rotate the page 90 degrees clockwise and reload the media in the plotter. The cut edge of the media should be along the left side of the plotter.
  8. Carefully align the line on the left pinchwheel with the left edge of the media. Raise the paper-loading lever.
  9. Lower the carriage cover and press ENTER button.
    Complete the following steps to calibrate the plotter.
    The message Calibrating will display. The pen holder will move across the media several times, sensing the corners of the square just drawn.
  10. When the calibration procedure is complete, the message Calibration complete will display. Turn the plotter off and then on again before plotting.
    If the calibration fails, the message Calibration failed will display. Turn the plotter off and then on again to clear the display. Then, check the following and start over:
    • Make sure the pen is operational.
    • When reloading polyester film, place the writing surface face up; make sure the left pinch wheel is correctly aligned with the left edge of the plotting media.
    • When cutting and reloading the media, place the cut edge along the left side of the platen.
    • Additionally, verify that the white stripe on the platen is clean. (This includes both the stripe and the white dots on either side.) Use a cloth dampened with water if this surface needs cleaning.






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