PPS Pro version 8.2.pdf - 第116页
User Manual 4022 591 98247 112 PPS-Pro v8.2 05.07 Guidelines for using PPS-Pro 3.3.3.5 Gerber Data handling PPS-Pro support s only ver sion Gerber RS-274D for artwork e xtraction. NOTE: To convert Gerber RS-274X to Gerbe…
4022 591 98247 User Manual
05.07 PPS-Pro v8.2 111
Guidelines for using PPS-Pro
On the selection “Program”/”Program All” PPS-Pro will collect all necessary
data for the optimizer to start the actual calculation.
On the selection “Optimize Cell”, the A-Series optimizer will start the
optimizer. The optimizer monitor will be shown (if optimizer results are set to
“good”
(see 2.25.1 on page 61)) and the Optimizer Monitor will pop up (see
SCREEN 44 on page 67).
NOTE: If not enough fidicials are located on the PCB it can happen that the first,
second or more placement robots will not be used for the placement of parts,
because not all fiducials could be measured. In most cases this happens if
only panel fiducials or PCBs with large boards are used: So there are no 2
fiducials under a placement robot. This means loss in performance or that
no results could be found (Placement Robots could not be used).
3.3.3.4 Optimize AX machine(s) in LOCAL mode
If production mode is set to LOCAL the Optimizer will always start with an
artwork extraction tool that extracts artwork fiducials from gerber data.
NOTE: If enough standard fiducials are on the product, artwork extraction can be
skipped.
NOTE: If artwork extraction is already done before on a previous optimizing run
(for a specific project and product), the artwork extraction process is
skipped and the optimizer is started immediately. If the artwork extraction
process needs to be re-done the artwork information (the file in the
directory ArtworkPatterns) must be removed then delete all files from
Documents and Settings\<username>\ArtworkPatterns. Where <username>
is the login name of the user.
Per user this results in a different location. If users wish to share this infor-
mation, they should copy the files to the account directories of all relevant
users. So if the optimizer is set to LOCAL mode (Refer to Description ALE-file
12nc 4022 591 98715), 2 extra steps are needed to collect the fiducials from
the artwork that is in the gerber data:
1. Select gerber files for artwork extraction
2. Aligning artwork with Cad-data
User Manual 4022 591 98247
112 PPS-Pro v8.2 05.07
Guidelines for using PPS-Pro
3.3.3.5 Gerber Data handling
PPS-Pro supports only version Gerber RS-274D for artwork extraction.
NOTE: To convert Gerber RS-274X to Gerber RS-274D special software tools can be
used. ExcelCAM and CAM350 are such tools.
NOTE: Restriction on Gerber Coordinates. Position Coordinates must be absolute
values. No leading and trailing zeros are not supported. All gerber layers
have the same unit size. No decimal programming is allowed.
This type of gerber data consists of at least two or more files:
■ Aperture file:
■ Copper layer:
■ Solder resists: layer:
■ Silkscreen layer: (optional):
At least one aperture file is needed for all layers. Alternatively it is also
possible to have an aperture file for each layer. The aperture file has no
standard layout and the columns can differ for each customer/end-user. For
AX machine artwork extraction the aperture file must have a specific format,
and therefore in most cases it should be changed to make it into accordance
with the requirements of the software.
NOTE: For information on Gerber refer to (see APPENDIX B on page 169)
3.3.3.6 Preparing the Gerber files
To make it possible to have artwork fiducial generation, gerber data is needed.
Artwork extraction supports gerber RS-274D format.
NOTE: Depending on what is present on the PCB useful spots on specific (visible)
layers must be found. These can be used as artwork fiducials. Also note that
if no text is printed on the board no Silk layer information is needed.
4022 591 98247 User Manual
05.07 PPS-Pro v8.2 113
Guidelines for using PPS-Pro
NOTE: Component size information from PSI is used to determine areas on the PCB
where vision actions for artwork recognition are forbidden. This means that
correct values (Length, Width and Height) are important and must be filled
in (Mandatory in LOCAL mode).
■ Creating the correct aperture file
PPS-Pro only needs four elements of information in each line of the aperture
file. Although there is no standard for aperture file formats from CAD stations,
here information is given how these files can be changed so that the software
can use them.
Information to look for:
• Shape: Normally circle, square, rectangle, and oblong, round, or other
terms and abbreviations related to these basic shapes.
• X and Y: The dimensions of the aperture in X and Y. Sometimes
indicated by width (X) and length (Y).
• D Code: The number of the aperture. Usually preceded by a “D” but not
always. Typically ranges from 10 up to 200.
• Numeric Format: X and Y can be in inches, mils, millimetres, etc.
(see FIGURE 11 "A correct Aperture file for artwork extraction" on page 115)
■ Properly Formatting an Aperture List
Before importing a list, you must first properly format it. Use a regular text
editor like Windows Wordpad, Excel or Notepad (Always save in ASCII format).
PPS-Pro has some requirements for the file prior to import.
• The file must be a comma separated (csv) text (ASCII) format.
• The first Line defines the Numeric format which can be mil (in case of
mils), inches or mm. Example :
UNIT, = , MILS
• The names must be types that PPS-Pro will understand. (see n
"Accepted Shape Designations" on page 114)
• The import format must be set with the proper column order for each
piece of data (All must be comma separated!):
a) 1st Column D-Code: Must be an integer
b) 2nd Column Shape: String according definition see n "Accepted
Shape Designations" on page 114
c) 3rd and 4th Columns: X / Y of the shape. Size is according the
unit-size set in the first line.
• The numerical format must be set correctly. (mil, inches, etc.)
• Lines not containing aperture information such as headers, expla-
nations, etc. must be either removed or commented-out by using the