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3.2.1
Vacuum unit
3.2.2
Transport vacuum regulators
3.2.3
Media tension roll
The vacuum unit, on the left side of the printer, sup-
plies the vacuum to the media transport belt.
Media is held securely on the media transport belt by
vacuum pressure from below.
The vacuum is applied over the area of the transport
bed in four individually controlled areas as shown by
the yellow arrows on the shuttle beam. Each area can
be controlled individually via a vacuum regulator.
The tension roll [1] keeps the media tight so that it
doesn't crease while printing.
3.2.4
Unwinding axle for roll media
A new roll of media is placed on the unwinding axle
[2] at the back of the printer. The unwinding axle has a
motor to keep the media under tension. The rotational
direction of the unwinding motor is opposite to the
direction of rotation of the winding motor. The rota-
tion power of the motors is controlled via controllers.
The media roll is clamped to the axle by bellows,
which move out of the axle when compressed air is
supplied to the nozzle of the axle.
The :Anapurna H3200i LED can also handle a dual
unwinding axle [2]. The dual unwinding axle has a
clutch and flanges to limit the media roll in a lateral
direction on the axle. The clutch and flanges need to
be re-adjusted for different widths of media rolls.
The :unwinding axle is a steel axle that can carry a
media roll with weight upto 300 gram per centimeter
media width (96 kg in case media of 3200mm width is
loaded).
1
2
