88242361-04-01 Vol 1 DEK TQ TECHNICAL REFERENCE (1).pdfPDFA.pdf - 第124页

8 SQUEEGEE MODULE 8.1 OVERVIEW 124 TECHNICAL REFERENCE MANUAL DEK TQ 04/2021 The pressure being applied during the print stroke is measured by a load cell (located in the spring beam assembly of the squeegee mechanism) a…

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8 SQUEEGEE MODULE
8.1 OVERVIEW
TECHNICAL REFERENCE MANUAL DEK TQ 04/2021 123
8 SQUEEGEE MODULE
8.1 OVERVIEW
1 Print Carriage 5 Squeegee Mounting Feet
2 Squeegee Mechanism 6 Front Squeegee
3 Rear Squeegee Stepper Motor 7 Rear Squeegee
4 Front Squeegee Stepper Motor 8 Squeegee Drip Tray
The squeegee mechanism is driven backwards and forwards across the stencil by the print car-
riage.
The squeegee mechanism incorporates two stepper motors to drive the two squeegees independ-
ently down onto the stencil when a print stroke is required. During the rearward stroke, the front
squeegee is in contact with the stencil performing a rear print stroke. During the forward stroke, the
rear squeegee is in contact with the stencil performing a forward print stroke.
8 SQUEEGEE MODULE
8.1 OVERVIEW
124 TECHNICAL REFERENCE MANUAL DEK TQ 04/2021
The pressure being applied during the print stroke is measured by a load cell (located in the spring
beam assembly of the squeegee mechanism) and if necessary, a correction to the pressure is
made by the software. The electronics for monitoring the squeegee pressure (load cell) is on the
conditioning board which is detailed in 7.1.1
"Conditioning Board" [}115].
8.1.1 Sensor Locations
1
3
2
5
4
View on Rear of Squeegee Mechanism
1 Rear Squeegee Home Sensor 4 Paste Roll Height Monitor Sensor
2 Load Cell 5 Front Squeegee Home Sensor
3 Spring Beam Assembly
8 SQUEEGEE MODULE
8.1 OVERVIEW
TECHNICAL REFERENCE MANUAL DEK TQ 04/2021 125
8.1.2 Paste Roll Height Monitor (PRHM)
8.1.2.1 Laser Safety
CAUTION
RADIATION. RISK OF INJURY TO THE EYES DUE TO LASER LIGHT BEING
PRESENT IN THE VICINITY OF THE LABEL. DO NOT LOOK AT THE LIGHT
SOURCE OR REFLECTIONS FROM A SURFACE.
CAUTION
EQUIPMENT SERVICING. THE LASER DOES NOT CONTAIN USER
SERVICEABLE PARTS. OPENING THE UNIT COULD CAUSE MIS-ALIGNMENT
OF THE LASER, THIS MAY MAKE THE EQUIPMENT DANGEROUS TO
OPERATE.
CAUTION
LASER CONTROLS AND ADJUSTMENTS. USE OF CONTROLS OR
ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
This module uses a Class 1 laser light source which in normal use does not represent a significant
risk of eye injury. When switched ON, the user should not stare directly into the laser light or at re-
flections from the light targeted surfaces for long periods.