Avery Dennison LOKPRINT II - Manual (Page 14)

14 •••• Product Description Users Manual LOKPRINT™ II
Product Description
Theory of Operation
The LOKPRINT™ II was designed to receive labels printed on both sides from a
AVERY DENNISON 676 printer or one sided from a AVERY DENNISON 636
printer using dye sublimation inks. The LOKPRINT™ II dye sublimates the labels
and feeds a Finishing Station for ultrasonic or cold knife cutting. The LOKPRINT™
II is equipped with four infrared (IR) quartz heating bulbs and two non-contact IR
heat sensors with one PID controller controlling the process and a second monitoring
the fabric temperature. The PID controller controls an SCR that regulates the energy
provided to the quartz bulbs, which produces the heat. The PID control, IR sensor,
SCR, and quartz bulbs are all part of an automatic, “closed loop” system to ensure
fully sublimated labels.
Once connected, all components of the LOKPRINT™ II act as a system, including
the Printer, LOKPRINT™ II and the Finishing Station. Optimum dye sublimation
occurs between the temperatures of 400° - 420° F (205° - 215.5° C) inside the heat
chamber. The LOKPRINT™ II will shut the printer down if the web temperature
drops below 400° F (205° C). This closed loop system approach ensures maximum
sublimation and minimum label waste.
Description of Operation
Hands free operation
Once the LOKPRINT™ II has been threaded, very little operator input is needed. As
the fabric moves through the heat chamber - the PID controllers control and monitor
the web temperature according to web speed. The LOKPRINT™ II is threaded with
the heat chamber in a parked (back) position. When the printer’s start button is
pushed, the heat chamber will move forward to the operating position that covers the
web - heating it to the desired temperature.
If the “stop” button on the printer is pushed or if the system shuts down
automatically, the heat chamber will move back to the parked position.
Interlocks
During operation, the LOKPRINT™ II will shut down the system automatically, if
one or more of the following conditions exist. See the Printer and or Finishing
Station manuals for their interlocks.
(1) Power lost to the LOKPRINT™ II.
(2) LOKPRINT™ II power switchable circuit breaker exceeds safe
current or temperature levels.
(3) Oven didn’t reach the operating position in time at startup.
(4) No web in web sensor.
(5) Heat chamber thermostat temperature exceeds safe limit.