Flora Digital Printing System
Model LJ320P
Copyright 2011@ Shenzhen Runtianzhi Image Technology Co.,Ltd. By Victor Xu
~ 28 ~
4.5 Ink Supply & Negative Pressure System
System Circuit:
4.5.1 Ink Supply System
The ink Bottle/Barrel serves as the main reservoir for ink
supply, should be refilled in a timely manner so continuous supply
of ink will not be interrupted during printing. The level of ink inside
the bottle/barrel can be monitored visually or using the buzzer
system. Refilling is done manually.
The ink pumps suck and discharge the ink into the
secondary ink tank. A five-micron filter is being provided to
prevent the secondary tank from being contaminated by
unwanted particles, which are inherent in the ink. Ink level sensor
inside the secondary ink tank sends an open or close contact
signal to the Print head control board and Ink control board to
control the operation of the pumps. An optional micro filter is
added to enhance the filtering of ink before it flows into the print
heads.
Every time the print heads eject/fire ink droplets, the ink
flows and fills the space left by droplets. A negative pressure
system is responsible for holding the ink from flowing out of the
print head nozzles.
4.5.2 Lack of Ink Warning Function
Ink alarm system plays a part in caution when the ink bottle is empty or the secondary tank is
not full.
The level sensor in the bottle detects the level of ink. The print head board will send the level
signal to the servo card. The servo card will process this signal then control the pump working, if the
pump works more than 25s, it will stop all the pump working and activate the buzzer. Meanwhile, the
Servo Card will report error 2.
Fig. 4.5.1: System Circuit
Fig. 4.5.1.1: Ink Supply
Compartment
