HP Scitex LX850 HP Scitex LX850 & LX820 Printers: User's Guide - English - Page 42

Load a roll into the printer, Load a roll (roll-to-roll configuration)

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Load a roll into the printer The objective when loading substrate is to get a uniform tension across its width and along the substrate path to minimize the risk of skew, wrinkles and telescoping. There are three configuration of loading the substrate into the printer: ● Roll-to-Roll configuration ● Dual Roll-to-Roll configuration (LX850 only, an accessory for the LX820) ● Roll-to-Free-Fall configuration (LX850 only) In each of these types of configuration there is a Substrate Loading Tool available that will help you to load the substrate quicker and easier, refer to Load a roll with the 'Substrate Loading Tool' on page 56 Load a roll (roll-to-roll configuration) The substrate roll is mounted on the rear spindle and will be collected on the front spindle. The substrate goes from the rear spindle (1) over the main roller (2), over the platen (3), over the front roller (4) and then to the front spindle (5). Handle the substrate NOTE: The above illustration shows the substrate loaded with the printed face outwards on both input and output rolls. You can also load substrate with the printed face inwards on either or both rolls, in which case the spindle will turn in the opposite direction. The printer asks you for the winding direction if it cannot detect it automatically. Each of the spindles has its own motor. The motors maintain tension on the substrate. Some vacuum is applied at the level of the platen to keep the substrate flat. The substrate is moved forwards by the drive roller motor, on which there is a pinch mechanism to stop the substrate from slipping. The pinches must be up when moving the carriage beam, and down when printing or checking the substrate, otherwise a message is displayed. The accuracy of the advance is controlled by the substrate-advance sensor, or, for substrates that the sensor cannot see, by tracking the main roller movement. Before loading a roll into the printer, you must have a roll loaded onto a spindle (the input roll) and an empty core loaded onto another spindle (the output roll). See Load a roll onto the spindle on page 33. 38 Chapter 3 Handle the substrate ENWW

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Load a roll into the printer
The objective when loading substrate is to get a uniform tension across its width and along the
substrate path to minimize the risk of skew, wrinkles and telescoping. There are three configuration of
loading the substrate into the printer:
●
Roll-to-Roll configuration
●
Dual Roll-to-Roll configuration
(LX850 only, an accessory for the LX820)
●
Roll-to-Free-Fall configuration
(LX850 only)
In each of these types of configuration there is a
Substrate Loading Tool
available that will help
you to load the substrate quicker and easier, refer to
Load a roll with the 'Substrate Loading Tool'
on page
56
Load a roll (roll-to-roll configuration)
The substrate roll is mounted on the rear spindle and will be collected on the front spindle. The substrate
goes from the rear spindle (1) over the main roller (2), over the platen (3), over the front roller (4) and
then to the front spindle (5).
NOTE:
The above illustration shows the substrate loaded with the printed face outwards on both input
and output rolls. You can also load substrate with the printed face inwards on either or both rolls, in
which case the spindle will turn in the opposite direction. The printer asks you for the winding direction
if it cannot detect it automatically.
Each of the spindles has its own motor. The motors maintain tension on the substrate. Some vacuum is
applied at the level of the platen to keep the substrate flat. The substrate is moved forwards by the drive
roller motor, on which there is a pinch mechanism to stop the substrate from slipping. The pinches must
be up when moving the carriage beam, and down when printing or checking the substrate, otherwise a
message is displayed. The accuracy of the advance is controlled by the substrate-advance sensor, or,
for substrates that the sensor cannot see, by tracking the main roller movement.
Before loading a roll into the printer, you must have a roll loaded onto a spindle (the input roll) and an
empty core loaded onto another spindle (the output roll). See
Load a roll onto the spindle
on page
33
.
38
Chapter 3
Handle the substrate
ENWW
Handle the substrate