Machine Overview.pdf - 第14页
MACHINE OVERVIEW MODULE OVERVIEWS 4.14 Technical Reference Manu al Chapter Issue 4 Nov 09 Print Carriage Module The print carriage module is the vehi cle that transports the follo wing: • Squeegee/ProFlow Module • Paste …
MACHINE OVERVIEW
MODULE OVERVIEWS
Chapter Issue 4 Nov 09 Technical Reference Manual 4.13
Machined C
Chase
The machined C chase is the receptacle for the screen during printing opera-
tions. The machined C chase accommodates the standard 29” by 29” screen
size. A stencil frame adapter is available to accommodate smaller screens.
The print screen is clamped into place by the machined C chase during the print
cycle. The machined C chase is only fitted to the metal covers machines.
There are two image scales used for achieving correct position of the screen
within the chase assembly:
• Centre Justified Image Scale
• Front Justified Image Scale
Screen
Alignment
Module
The screen alignment module enables adjustment of the machined chase to
achieve optimum screen to board alignment prior to the print stroke. Actuators
move the print screen in the X, Y and theta planes to nullify the misalignment
error signal from the vision system.
Figure 4-15 Machined C Chase - Screen Alignment
Screen Alignment
(chase clamp)
Screen Alignment
(chase clamp)
Screen Alignment
(actuators)
Machined C Chase
MACHINE OVERVIEW
MODULE OVERVIEWS
4.14 Technical Reference Manual Chapter Issue 4 Nov 09
Print Carriage
Module
The print carriage module is the vehicle that transports the following:
• Squeegee/ProFlow Module
• Paste Dispenser Module
• Screen Change Module
Paste Dispenser
Module
The function of the paste dispenser module option is to apply a precise amount
of solder paste onto the print screen, the frequency is fully programmable in
software.
Figure 4-16 Print Carriage - Paste Dispenser - Screen Change
Paste Dispenser
Print Carriage
MACHINE OVERVIEW
MODULE OVERVIEWS
Chapter Issue 4 Nov 09 Technical Reference Manual 4.15
Pneumatics
Module
The function of the pneumatics module is to supply regulated air pressure to the
pneumatic devices throughout the machine. The air supply is routed to the
required pneumatic device via an electrically operated solenoid valve controlled
by the machine control system.
There are two banks of pneumatic solenoids, one located on the rear frame of
the machine and the other located on the print carriage.
Squeegee Module The function of the squeegee module is to apply the print material through the
screen image onto the board in a controlled manner. Squeegee height and
downward pressure is monitored during the print stroke to optimize the print
quality.
ProFlow Module The ProFlow module is an optional self contained paste transfer unit, employed
to apply print material directly to a screen, alleviating the need for squeegees
and the paste dispenser.
Figure 4-17 Pneumatics - Squeegee - ProFlow
Squeegees
ProFlow
Pneumatics