192277 - Micron Technical Reference Volume 3 - 第96页
INTERCHANGEABLE UNDER SCREEN CLEANER MODULE OVERVIEW 25.2 Technical Reference Manual Chapter Issue 6, Jan 17 The under screen cleaner (USC) wipes lint free paper , dry or wet across the underside of the screen to minimiz…
INTERCHANGEABLE UNDER SCREEN CLEANER MODULE
OVERVIEW
Chapter Issue 6, Jan 17 Technical Reference Manual 25.1
CHAPTER 25 INTERCHANGEABLE UNDER SCREEN CLEANER MODULE
OVERVIEW
NOTE
Vacuum Filtration Units VF35i and VF30 are located at the rear of Type 4 and
Type 5 machines and accessed by removing the rear panel.
Item Description Item Description
1 Squeegee Assembly (Wipers) 10 Solvent Spray Bar
2 Take Up Roll 11 Vacuum Connector
3 Paper Feed Motor 12 External Solvent Tank
4 Permanent Magnet (2 positions) 13a VF 10 Venturi Vacuum Filtration Unit
5 Lift Mechanism Air Flow Controller 13b VF35i Vacuum Filtration Unit
6 Electromagnetic Clamp (2 positions) 13c VF30 Vacuum Filtration Unit
7 Solvent Pump 13d VF25 Vacuum Filtration Unit
8 Paper Usage Sensor
9 Clean Paper Roll
13b
13a
13d
1
2
3
4
4
5
6
7
9
8
10
11
6
12
13c
INTERCHANGEABLE UNDER SCREEN CLEANER MODULE
OVERVIEW
25.2 Technical Reference Manual Chapter Issue 6, Jan 17
The under screen cleaner (USC) wipes lint free paper, dry or wet across the
underside of the screen to minimize print medium build up. The paper is
available in 300, 400 and 520mm widths. The frequency and mode (wet/dry/
vac) is programmable in the product file.
When a screen cleaner operation is required, the camera carriage approaches
the cleaner and attaches to the cleaner using two permanent magnets. The two
electromagnetic clamps holding the screen cleaner unit in the home position are
de-energized allowing the camera carriage to control the cleaner. The paper
feed motor supplies a clean section of paper across the two rubber wiper blades
of the squeegee assembly. During a ‘Wet’ clean, a solvent pump dispenses
solvent through the solvent spray bar, wetting the width of the paper just behind
the squeegee assembly. The squeegee assembly is lifted (engaging the cleaner
with the underside of the screen) and the camera carriage pulls the cleaner
across the underside of the screen, removing any surplus print medium.
The two wiper blades form the mouth of the vacuum cleaner.
A paper usage sensor enables the software to monitor the paper roll usage. If
‘Time To Go’ is enabled, software measures how much paper is remaining and
displays this as a percentage. If ‘Time To Go’ is disabled, software monitors
the pulses from the sensor and if no pulses are detected during paper advance,
it is assumed that the paper roll is empty and displays an error message.
Solvent The solvent pump supplies solvent to the paper roll from the external solvent
tank, mounted on the rear or either side of the machine. The external solvent
tank container is capable of accommodating a 5 litre container of solvent. For
Type 1 - 4 machines a load cell in the base of the external solvent tank enables
the software to calculate the percentage level of solvent within the container.
Type 5 machines also utilize an external solvent tank container capable of
accommodating a 5 litre container of solvent. For this type of solvent tank, a
solvent low level float switch fitted to the solvent container enables the software
to calculate the solvent level.
Solvent Advice The plastic tubing that transports the solvent from the solvent tank to the
underscreen cleaner head is designed to withstand most types of solvent.
However, mixing of two different solvents can cause a chemical reaction and
seriously damage the plastic tubing. When changing to a different type of
solvent, the tubing must be replaced completely to prevent solvent leaks. To
obtain new tubing and replacement instructions, order Machine Performance
Upgrade (MPU) 601187*2.
INTERCHANGEABLE UNDER SCREEN CLEANER MODULE
OVERVIEW
Chapter Issue 6, Jan 17 Technical Reference Manual 25.3
ASM only recommend the DEK-PRO and the DEK-PRO XF (Environmentally
Friendly) USC solutions to be used with the under screen cleaner. The following
are available from ASM:
NOTE
The following solvents MUST NOT be used in the under screen cleaner unit,
however, this list is not complete and does not mean that any solvent not
mentioned is compatible, with DEK machines.
• Rosstech 106 FE
• Rosstech 162 ND
• Acetone
• Iso-Propyl Alcohol (IPA)
Vacuum Filtration The vacuum filtration unit extracts solvent fumes and draws excess print
material onto the paper. Vacuum filtration is optional and may be one of the
following types:
Vacuum filtration is optional and may be one of the following types:
• VF35i Vacuum Filtration Unit
• VF30 Vacuum Filtration Unit (Type 5 machine only)
• VF25 Vacuum Filtration Unit
• VF10 Venturi Vacuum Filtration Unit
NOTE
For information on the removal and replacement of the filters, refer to the
Preventive Maintenance manual.
Description 1 Litre 5 Litre 20 Litre
DEK-PRO 173483 173485 431093
DEK-PRO XF 431513 431514 -