00198481-01_Technical_Training_E_by_DEK_EN.pdf - 第48页

6 Print Head 6.1 Squeegee Module 48 Technical Training E by DEK 12/2017 6.1.1 Squeegee Functionality The Squeegee is fixed onto the print carriage and moves in Y-direction over the stencil. It works with 2 stepper motors…

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6 Print Head
6.1 Squeegee Module
Technical Training E by DEK 12/2017 47
6 Print Head
6.1 Squeegee Module
The Squeegee Module consists of the following sub-assemblies:
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2x Squeegee stepper motors
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2x Drive belts
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Dual stepper drive card (x2)
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Strain Gauge
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2x inductive home sensors
1. Head mechanism 5. Drip Tray (optional)
2. Rear stepper motor 6. Rear Squeegee
3. Front Squeegee 7. Print Carriage
4. Drip Tray Mechanism 8. Front stepper motor
6 Print Head
6.1 Squeegee Module
48 Technical Training E by DEK 12/2017
6.1.1 Squeegee Functionality
The Squeegee is fixed onto the print carriage and moves in Y-direction over the stencil. It works
with 2 stepper motors one each for front and rear Z movement.
As an option the squeegee pressure can be measured during the print cycle.
During production the squeegee pressure is measured and, if necessary, will be automatically
adjusted. This is done using a strain gauge which is built into the rear part of the squeegee head.
The pressure measurement can be activated or deactivated in the machine settings.
1. Strain gauge (inside unit)
2. Front squeegee home sensor
3. Front squeegee holder
4. Rear squeegee holder
5. Rear squeegee home sensor
6. Strain gauge unit
Front Squeegee Drive Belt
1. Stepper motor securing screws
2. Front squeegee motor
3. Rear squeegee motor
6 Print Head
6.1 Squeegee Module
Technical Training E by DEK 12/2017 49
6.1.1.1 Reference run / Homing sequence
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During the reference run the system is initialized. The squeegee drives slowly upwards
towards the home sensor until the sensor is activated.
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Then the motor changes direction and moves away until the sensor is deactivated.
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The motor stops and the home is reached.
1. Micro Switch
2. Inductive Sensor
 NOTICE!
Depending on machine build date 2
different sensors are used. The
functionality remains the same.
.
6.1.2 Overview Squeegee Module Electrical System