12 Printer systems
Printer systems
Under the same area, but not visible from outside the printer, there is the TOMAS sensor which measures
the temperature in the area and helps OMAS to provide the drive motors with a higher degree of
accuracy.
Startup, substrate load, substrate selection
During startup, the printer checks that the substrate path components are functioning correctly. When
shutting down, if a substrate is loaded, the printer remembers the substrate definition. This may be
modified through the front panel with the option ’Change loaded substrate’ from the substrate menu list.
During substrate loading the printer may ask the user two interactions:
1. To rewind manually the media: The printer automatically checks the direction of the loaded media
(printed face outwards or printed face inwards). If the ’curve’ of media is too large the printer cannot
detect it and the printer asks the user to rewind manually. Once the media is rewound the printer
can detect automatically
2. To align the substrate in order to avoid skew: the printer measures skew. If the skew is too large the
printer will ask the user to lift the pinchwheels (big blue lever on right hand side) and align the sub-
strate. The substrate must be aligned against itself (media edge must be aligned with input roll
edge).
Components
Spindle
The spindle can load 3” core rolls. It holds the core of the roll when its rubber bands are nipped between
the core of the roll and the aluminum extrusion.
The hub on the left side has two possible fixed positions: the end position allows loading maximum width
rolls, but there is a second position at 2.6 inches (65mm) from the end that can be selected.
The right hub can be set along any length of the spindle so any length of roll can be loaded.
The right end of the spindle contains a gear which is used to transmit the movement from the rewinder to
the roll.
NOTE: The OMAS sensor cannot see the fibers on some substrates, such as transparent
media or very dark or very reflective substrates. In these cases, the OMAS sensor can
be disabled. To disable the OMAS sensor
⇒
See page 189.
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