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SQUEE GEE M ODULE OVERVIEW Chapter Issue 8 Oct 06 Technical Reference Manual 9.3 Squeegee Drip Tr a y Figure 9-2 Squeegee Drip T ray Overview The squeegee dr ip tray mecha nism secures to the un derneath of the pri nt ca…
SQUEEGEE MODULE
OVERVIEW
9.2 Technical Reference Manual Chapter Issue 8 Oct 06
The squeegee mechanism is driven backwards and forwards across the screen
by the print carriage.
The squeegee printhead mechanism incorporates two stepper motors to drive
the two squeegees independently down onto the screen when a print stroke is
required. During the rearward stroke, the front squeegee is in contact with the
screen performing a rear print stroke. During the forward stroke, the rear
squeegee is in contact with the screen performing a forward print stroke.
The pressure being applied during the print stroke is measured by a strain
gauge bridge (located in the spring beam assembly of the squeegee mecha-
nism) and if necessary, a correction to the pressure is made by the software.
Figure 9-1 Squeegee Sensor Locations
View on Rear of Squeegee Printhead Mechanism
Rear Squeegee Mount Front Squeegee Mount
Front Squeegee Home
Sensor
Rear Squeegee Home
Sensor
Spring Beam Assembly
(rear plate shown
transparent)
Strain Gauge Bridge
(inside spring beam
assembly)
SQUEEGEE MODULE
OVERVIEW
Chapter Issue 8 Oct 06 Technical Reference Manual 9.3
Squeegee Drip
Tray
Figure 9-2 Squeegee Drip Tray Overview
The squeegee drip tray mechanism secures to the underneath of the print
carriage. The drip tray pneumatic actuator extends the drip tray below the
squeegees to prevent print medium from dripping onto the screen during print
carriage initialisation or auto screen loading.
The squeegee drip tray mechanism is also used to accommodate the auto
screen loader mechanism, refer to the Adjustable Screen Mount (ASM) or Cast
C Chase Module chapters for more information.
The drip tray retracted sensor is used by software to check that the pneumatic
actuator has retracted the drip tray before lowering the squeegees.
NOTE
With the squeegee drip tray and the screen depth adjuster fitted, the ASM must
be set to 29 inches and cannot accommodate smaller screen sizes.
View on Rear of Squeegee Drip Tray
View on Front of Squeegee Drip Tray
Squeegee
Drip Tray
Squeegee Drip Tray
Securing Screw
Drip Tray Guide Shaft
Drip Tray Pneumatic
Actuator
Drip Tray
Retracted Sensor
Speed
Control Valves
Squeegee Drip Tray Mechanism
SQUEEGEE MODULE
ELECTRICAL SCHEMATIC
9.4 Technical Reference Manual Chapter Issue 8 Oct 06
ELECTRICAL SCHEMATIC
Squeegee Front
Home
(9SE04)
Squeegee Rear
Home
(9SE05)
Rear
Squeegee
Stepper
Motor
(9M4)
Motor 1 B-
Motor 1 B+
Motor 1 A-
Motor 1 A+
Motor 2 B-
Motor 2 B+
Motor 2 A-
Motor 2 A+
Print Carriage
9PL16
9PL08
9PL17
0V
+V
-IN
+IN
Strain Gauge Bridge
(9SE6)
Spring Beam
9SK11
9SK12
Print Carriage I/O
Node 3
N3PL16
M36PL35
N3SK2
N3SK3
CAN Bus
PC
Motherboard
USB
NextMove ES
(I/O Node 1)
NextMove
Interface
Dual Stepper
Card X2
M36 Machine Control
Step 3
Step 4
Front
Squeegee
Stepper
Motor
(9M3)
M36PL21
M36PL12
M36PL21
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.