Illinois Tool Works 5750-440, Руководство по эксплуатации

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OPERATIONS MANUAL – 5750440 – REVISION D
Theory of Operation Appendix C
Mechanical
C1
System Fluidics :
Ink flows into the printhead from a pressurized “ink can” supply [A] . The ink can is filled to 50 psi which
allows it to completely discharge its ink and maintain an adequate supply pressure to the printhead. An
ink-pressure regulator
[E] reduces the ink pressure to 7-psi for system operation. Regulator settings
must be 7-psi output and 50 psi input to maintain consistent dot-diameter and printhead operation. A
pressure transducer
[F] inside the printhead monitors operating pressure. When ink pressure falls below
5 psi, the transducer sends a signal to the controller [B] to indicate that the can is empty. The controller
lights an “ink low” LED as an operator warning of low ink supply . As the ink can empties, the ink
pressure quickly drops until it is insufficient to completely eject ink from the printhead. Very low ink
pressure pushes a small amount of ink onto the surface of the orifice plate. This ink collection is normal.
As a result, the orifice plate should be cleaned each time the ink can is replaced.
[A] INK UNDER PRESSURE (50PSI FULL, 0PSI
EMPTY) (PRESSURIZED CAN)
[B] CONTROLLER
[C] CHECK VALVE
[D] INK FILTER
[E] PRESSURE REGULATOR TO REDUCE
OPERATING PRESSURE TO 7PSI
[F] PRESSURE TRANSDUCER TO DETECT
WHEN THE INK CAN IS EMPTY
[G] VALVE BODY
[H] INK INLET
[I] INK FILTER
[J] INK OUTLET
[A]
[B]
[C]
[D]
[E]
[F]
[I] [H]
[G]
[J]