Vista Machine Overview.pdf - 第8页
MACH INE OVERVIE W MODUL E OVERV IEWS 3.8 Technical Reference Manual Chapter Issue 1 Sep 02 Camera and Vis ion System Module The function of the camera and vi sion system is to supply a visu al indicati on of screen to b…
MACHINE OVERVIEW
MODULE OVERVIEWS
Chapter Issue 1 Sep 02 Technical Reference Manual 3.7
Board Support
Tooling Module
The role of the board support tooling is to support the board during the print
cycle, to prevent print distortion caused by flexing of the board as a result of the
downward pressure of the squeegees/ProFlow. Several different types of board
support tooling are available to suit a variety of surface mount process require-
ments.
Rising Table
Module
The rising table module fulfills two functions:
• Provide a stable base for the board support tooling
• Positioning of the board support tooling and the rail system modules during
the print cycle
Figure 3-5 Machine Front View
MACHINE OVERVIEW
MODULE OVERVIEWS
3.8 Technical Reference Manual Chapter Issue 1 Sep 02
Camera and Vision
System Module
The function of the camera and vision system is to supply a visual indication of
screen to board alignment and board and screen inspection data to the vision
card within the machine PC enclosure. The vision card supplies the captured
information to the processor to enable the processor to:
• Utilize the error signal to improve stencil alignment
• Provide visual information for the user on the MMI monitor
When enabled, monitor the printing process to ensure print quality
Screen Change
Module
The screen change module enables manual loading and unloading of the print
screen to the correct position within the chase assembly. The module is fully
adjustable to accommodate the most popular sizes of print screens.
ProFlow Module The ProFlow module is an optional self contained paste transfer unit, employed
to apply solder paste directly to a screen, alleviating the need for squeegees.
Figure 3-6 Machine Plan View
MACHINE OVERVIEW
MODULE OVERVIEWS
Chapter Issue 1 Sep 02 Technical Reference Manual 3.9
Power Supply
Module
Comprising of the two major units within the machine, the module fulfills the
following functions:
• Transform and rectify the mains voltage supply to the voltages required by
the electrical systems throughout the machine.
• Electrical safety - achieved by the use of emergency stop safety circuits (E
Stop). When an E Stop is activated, power is removed from selected areas
of the machine.
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 controller enclosure.
Under Screen
Cleaner
The under screen cleaner module provides the facility to automatically clean the
underside of the stencil so reducing the build up of paste. The frequency and
mode is programmable in software. The screen cleaner is driven across the
underside of the stencil by the camera carriage.
Figure 3-7 Machine Front View
Underscreen Cleaner Module
Power Supply Module
Pneumatics Module