03217917-01-01E By DEK Technical Reference Manual Vol 1_enPDFA.pdf - 第53页
5 MACHINE OVERVIEW 5.1 MODULE OVERVIEWS TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019 53 5.1.9 Underscreen Cleaner The understencil cleaner module automatically cleans the underside of the stencil so reducing the bui…
5 MACHINE OVERVIEW
5.1 MODULE OVERVIEWS
52 TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019
5.1.8 Camera System Module
The function of the camera system is to supply a visual indication of screen to board alignment and
board/screen inspection data to the machine PC enclosure. The captured information supplied to
the PC enclosure enables the processor to:
●
Align the screen to the product board
●
Provide visual information for the user on the MMI monitor
The camera assembly traverses horizontally in the X and Y axis and is driven by rotary servo mo-
tors.
The camera carriage is also used to transport the board stop and the understencil cleaner.
5 MACHINE OVERVIEW
5.1 MODULE OVERVIEWS
TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019 53
5.1.9 Underscreen Cleaner
The understencil cleaner module automatically cleans the underside of the stencil so reducing the
build up of paste. The understencil cleaner is driven across the underside of the stencil by the cam-
era carriage.
The understencil cleaner module provides the facility to store solvent for wet cleaning cycles. The
external solvent tank may be mounted on either side or the rear of the machine.
The vacuum filtration unit removes excess paste from the stencil and solvent/print material fumes.
1
2
3
1 Understencil Cleaner 3 External Solvent Tank
2 In Built Vacuum Filtration (IBVF)
Unit
5 MACHINE OVERVIEW
5.1 MODULE OVERVIEWS
54 TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019
5.1.10 Machined C Chase
The machined C chase is the receptacle for the stencil during printing operations. The machined C
chase accommodates the standard 29" by 29" stencil size. The print stencil is clamped into place
by the machined C chase during the print cycle.
There are two methods used for achieving correct position of the stencil within the chase assembly:
●
Stencil Depth Adjuster
●
Stencil Change Mechanism
There are two image scales on the stencil depth adjuster:
●
Centre Justified Image Scale
●
Front Justified Image Scale
5.1.11 Screen Alignment Module
The stencil alignment module enables adjustment of the machined chase to achieve optimum sten-
cil to board alignment prior to the print stroke. Actuators move the print stencil in the X, Y and theta
planes to nullify the misalignment error signal from the vision system.
1
6
2
3
4
5
1 Chase Clamp (Stencil Alignment) 4 Chase Clamp (Stencil Alignment)
2 Machined C Chase 5 Stencil Depth Adjuster
3 Stencil Depth Adjuster 6 Stencil Change Mechanism