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SCRE EN CHAN GE MODUL E ELECTRIC AL SCHEMA TIC Chapter Issue 5 May 05 Technical Reference Manual 13.3 ELECTRICAL SCHEMA TIC Screen Position 13SE1 1 +12V Signal 0V N3PL5 DIG IN 3 Screen S top Actuator Retracted 13SE13 N3P…

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SCREEN CHANGE MODULE
OVERVIEW
13.2 Technical Reference Manual Chapter Issue 5 May 05
The screen change module ensures the correct position of the screen within the
chase assembly. There are two methods used for achieving correct position:
• Screen Depth Adjuster
• Screen Change Mechanism
Screen Depth
Adjuster
The screen depth adjuster is set (Distance to Image) by the operator prior to
loading the screen. The screen is loaded manually into the chase until it
reaches the stop at the end of the screen depth adjuster.
NOTE
For further information on setting the screen depth adjuster, refer to Screen
Depth Adjuster in the Adjustments and Settings section of this chapter.
Screen Change
Mechanism
The screen change mechanism accurately positions the screen in the chase,
automatically. The screen change mechanism is secured beneath the print
carriage, therefore the drive for the automatic loading of a screen is provided by
the print carriage drive system.
Initially the screen is manually loaded and the front printhead cover/shutter is
closed. When Screen Change is selected on the MMI, the screen change
mechanism is driven forward by the print carriage to locate the rear edge of the
screen. Once located, the screen change mechanism is driven further forward
allowing the screen load lever to clear the inner face of the rear frame of the
screen. The screen load lever is driven down and the print carriage is reversed
pulling the screen to the rear of the chase. The screen load lever is retracted
and the screen change mechanism is driven rearwards allowing the screen load
lever to clear the rear face of the screen. The screen load lever is lowered and
the screen change mechanism is driven forwards, pushing the screen to the
correct position. Once the screen is registered in the correct position for
printing, the screen load lever is retracted and the screen is secured in position.
During the screen load sequence, the drip tray is extended below the squee-
gees to prevent the print medium dripping onto the screen. The drip tray is also
extended whilst the print carriage is moving during initialization.
NOTE
The drip tray is removed if ProFlow is fitted.
SCREEN CHANGE MODULE
ELECTRICAL SCHEMATIC
Chapter Issue 5 May 05 Technical Reference Manual 13.3
ELECTRICAL SCHEMATIC
Screen Position
13SE11
+12V
Signal
0V
N3PL5
DIG IN 3
Screen Stop
Actuator Retracted
13SE13
N3PL7
DIG IN 5
Screen Stop
Actuator Extended
13SE12
N3PL7
DIG IN 4
Screen Stop
Actuator
9SOL29
N3PL8
DIG OUT 7
Drip Tray Actuator
9SOL28
N3PL8
DIG OUT 6
Drip Tray Actuator
Retracted 13SE14
N3PL9
DIG IN 6
Print Carriage
Print Carriage I/O
Node 3
M36PL35
N3SK2
N3SK3
CAN Bus
PC
Single
Board
Computer
(SBC)
or
Motherboard
USB
NextMove ES
(I/O Node 1)
M36 Machine Control
CAN
Out
CAN
In
NOTE
The breaks in the CAN Bus chain
reflect that additional I/O Nodes
may be fitted, refer to Machine
Control chapter for the complete
CAN Bus chain.
SCREEN CHANGE MODULE
ADJUSTMENTS AND SETTINGS
13.4 Technical Reference Manual Chapter Issue 5 May 05
ADJUSTMENTS AND SETTINGS
Screen Depth
Adjuster
The screen depth adjuster has two scales as follows:
The rear of stencil to front of image scale, marked on the top of the screen depth
adjuster, can be used for either centre justified or front justified stencils. The
scale has both imperial and metric units as follows:
• Metric - 150mm to 650mm
• Imperial - 6” to 26”
When using this scale the screen depth adjuster is set to the rear of stencil to
front of image value. The figure below shows this measurement for both centre
and front justified stencils
Figure 13-1 Rear of Stencil to Front of Image Measurement
REAR OF STENCIL
TO FRONT OF IMAGE
CENTRE JUSTIFIED IMAGE SIZE
650
622 600 550 500 450 400 350 300 250 200 150
68101214161820222426
508 500 400 300 200
100 0
048121620
Rear of Stencil to Front of Image Scale
Centre Justified Image Size Scale
Front Justified
Rear of Stencil
to
Front of Image
Centre Justified
NOTE
Rear of stencil to front of image is measured from the rear
face of the screen frame to the front edge of the image.
Rear of Stencil
to
Front of Image