HP Designjet L26100 HP Designjet L26500/L26100 Printer Series - User's Guide - Page 93

Spindle, Substrate, Substrate advance compensation, Unidirectional, Vacuum pressure

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PVC Polyvinyl Chloride. Spindle A rod that supports a roll of substrate while it is being used for printing. Substrate A thin, flat material designed to be printed on, made of paper or other materials. Substrate advance compensation A slight adjustment to the amount of substrate advance between print passes, to compensate for the characteristics of different substrate types. The printer normally performs this adjustment automatically, but may need to be recalibrated for substrates not supported by HP, or for an unusual ambient temperature or humidity. Incorrect substrate advance compensation may cause banding with fewer than 8 passes, or graininess with 8 passes or more. Substrate-advance sensor The sensor located in the print platen that tracks the substrate movement and increases its accuracy. Otherwise known as OMAS (Optical Media Advance Sensor). Unidirectional Unidirectional printing means that the printheads print only while moving in one direction. The speed of printing is lower than in bidirectional. In general, print bidirectional and increasing the number of passes is a better way of improving print quality. Vacuum pressure The substrate is held flat against the platen by vacuum suction. Too much or too little suction may cause print quality defects. Too little suction may also cause a substrate jam or damage the printheads. ENWW Glossary 89

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PVC
Polyvinyl Chloride.
Spindle
A rod that supports a roll of substrate while it is being used for printing.
Substrate
A thin, flat material designed to be printed on, made of paper or other materials.
Substrate advance compensation
A slight adjustment to the amount of substrate advance between print passes, to compensate for the characteristics
of different substrate types. The printer normally performs this adjustment automatically, but may need to be
recalibrated for substrates not supported by HP, or for an unusual ambient temperature or humidity. Incorrect
substrate advance compensation may cause banding with fewer than 8 passes, or graininess with 8 passes or
more.
Substrate-advance sensor
The sensor located in the print platen that tracks the substrate movement and increases its accuracy. Otherwise
known as OMAS (Optical Media Advance Sensor).
Unidirectional
Unidirectional printing means that the printheads print only while moving in one direction. The speed of printing is
lower than in bidirectional. In general, print bidirectional and increasing the number of passes is a better way of
improving print quality.
Vacuum pressure
The substrate is held flat against the platen by vacuum suction. Too much or too little suction may cause print
quality defects. Too little suction may also cause a substrate jam or damage the printheads.
ENWW
Glossary
89