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ENGINEERING SPECIFICATION
MACHINE OPTIONS
Statistical Process Control
Remote Product Changeover
Long Board
38
DEK use Statistical Process Control (SPC) techniques to verify the quality of the
Horizon machine at build, during training courses, at installation and at any time
the machine accuracy is suspect. To be of good quality the products of a process
must conform to predetermined expectations and must be consistent, ie the paste
apply to a printed circuit board.
DEK use an optional standalone software program, QC Calc to collect and
analyse various outputs from the machine to achieve this.
SPC data can be used to improve the yield of the Horizon by:
•
Qualifying the Horizon
•
Optimizing the process
•
Continuously monitoring the process
•
Rejecting defects before they enter the rest of the line
The Remote Product Changeover system is an optional software package
installed on a stand-alone PC connected to a bar code scanner and the Horizon
via a network connection. The software package uses GEM interface to send
commands to, or receive data on events from the Horizon. The package uses its
own database to relate products with bar codes. The bar codes can be set up with
wildcard characters to limit the scope of checking to certain characters within the
bar code.
The system monitors the bar codes of boards before they enter the printer. When
the system detects that the board that has just been scanned is not related to the
product currently being printed, the batch is stopped. Once the last board of the
batch is downloaded, the new product file is automatically loaded. The operator
is prompted to replace the screen and tooling before proceeding with the new
batch of boards.
The system also stops boards entering the Horizon if the bar code read does not
relate to any of the products in the database or if a bar code cannot be read on a
board.
Whilst the system is in use the stand-alone PC displays the following
information:
•
Current scanned bar code
•
Product being printed
•
Printer status
This software option enables the Horizon printer to print boards up to 620mm
long.
Engineering Specification
Chapter Issue 1 May 00
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