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User Manual 4022 591 98247 114 PPS-Pro v8.2 05.07 Guidelines for using PPS-Pro user-sel ectable comm ent chara cter in the first column of the un wan ted line . This may seem lik e a lot t o handl e, but i t is really qu…

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4022 591 98247 User Manual
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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
User Manual 4022 591 98247
114 PPS-Pro v8.2 05.07
Guidelines for using PPS-Pro
user-selectable comment character in the first column of the
unwanted line.
This may seem like a lot to handle, but it is really quite simple in practice and
is much faster and more reliable than manual input of the apertures.
■ Accepted Shape Designations
PPS-Pro will accept a great variety of text strings as shape names to minimize
the need for editing the files. Keep in mind that PPS-Pro’s extraction system is
only looking for the centres of each feature.
NOTE: If you encounter a strange shape in the file like a target or other exotic
aperture, simply make it square or circular of the same size—it will not
affect the function of the program, only how it is displayed.
PPS-Pro accepts the following strings as designations for units in upper cases:
• Accept as Inch: INCH
• Accept as millimetre (1/1000 metre): MM
• Accept as milli inch (1/1000 inch): MILS
• Accept as micrometer (1/1000000 metre): UM
PPS-Pro accepts the following strings as designations for shape in either
upper, lower or combination cases:
• Accepted as Circle:
ROUND, ROUND_RING, CIRCLE, DONUT, OVAL, ELLIPSE
• Accepted as Rectangle:
RECTANGLE, LINE, OBLONG
• Accepting as Square:
SQUARE
■ Typical Aperture Lists and How to Deal with Them
The following examples illustrate a example and a proper formatted aperture
file.
In the example see FIGURE 10 "Example as starting aperture file" on page 115
a typical customer aperture file.
//
// aperture_based V2.2 001127
//
//
4022 591 98247 User Manual
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Guidelines for using PPS-Pro
//Position Shape XYR DCODE SHAPE
1 LINE 100.0 D70
2 LINE 125.0 D71
3 LINE 150.0 D20
4 CIRCLE 20.0 D21
5 CIRCLE 43.0 D22
6 RECTANGLE 43.5 43.5 0 D26
7 CIRCLE 91.0 D27
8 CIRCLE 118.0 D28
9 CIRCLE 67.0 D30
FIGURE 10 Example as starting aperture file
In the correct Aperture file see FIGURE 11 "A correct Aperture file for artwork
extraction" on page 115 all comments are removed. The first line contains the
unit-size for all X / Y Columns. Notice that several apertures have only one
dimension (‘CIRCLE’ and ‘LINE’). So extra values (dimension) must be added for
these shapes. Also notice that the columns are comma separated.
UNIT,=,MILS
70,LINE,100.0,0
71,LINE,125.0,0
20,LINE,180.0,0
21,CIRCLE,20.0,0
22,CIRCLE,43.0,0
26,RECTANGLE,43.5,43.5
27,CIRCLE,91.0,0
28,CIRCLE,118.0,0
30,CIRCLE,67.0,0
FIGURE 11 A correct Aperture file for artwork extraction
3.3.4 Artwork extraction
3.3.4.1 Select gerber files for artwork extraction
Step one from the pre optimizing stage for Local mode is the collection of files
needed for artwork extraction. Gerber files and aperture files need to be
selected. Make sure the files have correct formats
(see 3.3.3.6 "Preparing the
Gerber files" on page 112) and select all appropriate files. When the calcu-
lation is started (Optimize Cell) a gerber files selection window is presented,
which is described in the following paregraph.