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HP Designjet 400 Series Printers - Paper Skew Troubleshooting

About paper skew

Skew occurs when the movement of paper in the paper advance mechanism is not square to the cartridge movement. The result is inconsistent print margins along the paper's edge. (The printing appears tilted on the page.) Several factors must be understood when dealing with skew:
  • Proper loading and handling of the paper can minimize skew. Make sure the paper is loaded properly.
  • Some types of paper can impact print skew.

Skew tolerance

The maximum skew is +/- .2 % (or .08 inches) for all measurements.

Troubleshooting paper skew

When you insert paper into the printer, the printer checks paper positioning and alignment. First, slide the front edge of the paper until it is justified against the stops. The right edge of the sheet must be positioned in the range indicated by a dashed line on the entry platen. (This range is +/- 7.5 mm from the nominal loading position.) After pressing the Load Media key, the printer advances the paper until the last margin passes over the paper sensor or enough paper has been fed through (depending on whether sheet or roll is selected). The printer is then able to work out the length of the sheet. The width is found by using the line sensor on the carriage.
To make paper loading easier, the printer will not reject any sheet that might be displaced and under the skew requirements. In this case the drawing will be offset on the y-axis.
Paper that is cut properly should not need the help of the skew tolerance feature. In fact, using this feature for properly cut paper increases the risk of skewing your print on the page.