YesAX V3.1.2 - Software User Manual.pdf - 第81页
3D Recipe Creatio n 7- 11 You should not need to move very far from the initial position to locate this alig nment box. If you need to move more than 10 mm, the scale in the YPC file may be wrong. Also, the software will…
7-10 3D Recipe Creation
NOTE
there is only one YPC file for both sides (top and bottom side) of the board’s
solder joints. For double sided boards (i.e. BGA component mounted on both
sides of the board), import the same YPC file twice: one for the top side and the
other for the bottom side. Although a YPC file contains information for all the
solder joints on both sides of the board, during the import process only the parts
that are in the part list of the selected side will be imported.
Recipe Creation Process Outline
The recipe creation process is started by selecting “New Recipe or Side” from the File menu.
The Create New Inspection Recipe dialog displays. Define board size and train the alignment
marks. After that, capture an image set and create a map view background image. The next step
would be importing of the YCD file (or files if double sided board.). After the import of the YCD
files, the Pin CAD import process will begin. In the next section we will describe the Pin CAD
import process in detail.
It is assumed that users have a good understanding of the other steps of the recipe creation
process for the YesAX.
Pin CAD Import Process
The Pin CAD import process begins by selecting which side of the board (top or bottom) to
import. This is done by pressing one of the show part buttons. For example, to
import the top side part pins, the “Show Top Part” button needs to be selected. After board side
selection, open the YPC file by selecting File>CAD Data>Import Pin CAD
Similar to the YCD import process, in the YPC import process the user is prompted for the
location of 3 pins (bottom left, bottom right and top left) to align the coordinate system. The first
prompt dialog may look like this:
In this case, place the alignment box on top of pin 28 of U2.
NOTE
Be careful when placing the alignment box. The part U2 has to be located near the
bottom left corner of the board. If not, the “Board Rotation” entry in the header
section of the YPC file may be wrong. In addition, pin 28 has to be located at the
bottom left corner of U2. If not, the “Rotation Offset” entry of the YCD file may
be wrong. If either case happens cancel the import process, edit the YPC or YCD
file to fix the problem, and then re-start the import process again.
The second prompt for the pin CAD alignment may look like this:
3D Recipe Creation 7-11
You should not need to move very far from the initial position to locate this alignment box. If
you need to move more than 10 mm, the scale in the YPC file may be wrong. Also, the software
will not allow the user to continue if it detected the user make an adjustment more than 10 mm
for the bottom right alignment pin.
NOTE
Y2701 has to be a part located near the bottom right corner of the board, and pin 4
has to be located near bottom right corner of Y2701.
You should not need to move very far from the initial position to location this alignment box. If
you need to move more than 10 mm, the scale in the YPC file is wrong. Also, the software will
abort if it detects the user make an adjustment of more than 10 mm for the bottom right
alignment pin.
The last alignment pin is a top left pin. |This alignment pin should be very close to its initial
location. The software will abort the import process if the user makes an adjustment of more than
10 mm for this third alignment.
After the alignment, the import process begins. The import process follows the sequence in the
YPC file, skipping over parts that are not in the part list. The Verify Pin Placement dialog
displays for the first pin (or solder joint) of each part to verify (or adjust) the pin’s XY positions.
7-12 3D Recipe Creation
At the top of the dialog, the software suggests setting X-ray power level for BGA inspection.
Move the mouse pointer to an area between the BGA balls and read the gray level at the status
window at the bottom right corner of the screen. The dialog also approximates the pitch of the
BGA. The information can help when selecting Pin Type from a standard pin library (refer to
13.6 Pin Library). Selecting Pin Type is optional and can be left blank if preferred.
Select either Pin Mode or Part Mode. Pin Mode will prompt the user to. The Verify Mode
section of the dialog gives the user the opportunity to re-size and re-position the pin.
By selecting Pin Mode, the user is prompted to verify every pin (this could take some time on a
1000+ pin BGA). When selecting Part Mode (probably most common), the user is prompted to
verify the first pin of every part. Sizing the first pin will set the size for all pins on the part.
Selecting the Set Part Outline checkbox instructs the software to set the part’s size and center
position (purple box) based on the positions of its pins. It should be checked for BGA and
Through-hole connector packages, and unchecked for other packages. It is usually easier to align
the Pin CAD data to greater accuracy than to align the part centroid data of the YCD file. This
feature eliminates the need to spend time adjusting part size during the YCD file import for BGA
and through-hole connector packages.
Selecting the Libraries Update checkbox instructs the software to update the parts, with the
same package, with newly acquired part information. Enable this for all the SMT parts. The only
time you may want it uncheck is for importing pin CAD for PTH parts (e.g. connectors) where
the YCD file contains a pin 1 XY position rather than a centroid XY position.
The Pin CAD import process creates solder inspection boxes for each pin (solder joint) with
Neutral direction and default algorithm (Histogram). User will need to switch them into the
correct algorithm for the inspection. The new inspection algorithm “BGA Pin Inspection” (a
solder algorithm) is designed to replace both BGA group ( a lead algorithm) and BGA Analysis
(a solder algorithm). The BGA Pin Inspection algorithm is currently the most likely algorithm
being used in conjunction with the Pin CAD import feature.