DECAN_S1_Administrator′s_Guide(Eng_Ver1.5)_Print.pdf - 第148页
6-34 Next Generation, Multi-Functional Plac er DECAN S1 Administrator’s Guide waste time checking for the ex istence of the bad mark. When this <Accept Mark> button is clicked on , the following dialog box for the …
6-33
Board Definition
<Width Y> edit box
Set the value of search range in Y axis direction. In general, it is 6 mm.
<8. Parameter> group
<Threshold> edit box
The image viewed through the SM Vision window is composed of each pixel.
Each pixel has a unique value between 0 and 255 according to the seen degree of
brightness. Here, ‘Threshold Value’ indicates the border value deciding whether
each pixel should be recognized in white or black. That is, setup the limitation for
deciding if the image pixel should be black or white when checking a bad mark.
For example, if <Bad Mark> is “Black” and the <Threshold> value is 100, then all
the values under 100 in the vision image are recognized as black, and if <Bad
Mark> is “White” and the <Threshold> value is 100, then all values over 100 are
recognized as white.
<Real Display/Binary> button
Shows the image seen through the SMVision in real display to which threshold is
not applied, or in the image (Binary) to which threshold is applied as recognized
by MMI.
<Light> group
Set the light value for bad mark inspection. In general it is 7, but adjust it
appropriately according to the condition of PCB and bad mark.
<Test> button
By using the registered mark information, tests the mark.. The accuracy of the
registered mark data can be verified. When the test is successful, the following
message box is displayed.
<OK> button
Saves the bad mark data and closes the “Bad Position” dialog box.
<Cancel> button
Closes the <Bad Position> dialog box without saving the bad mark data.
6.5. Accept Mark setup
The bad mark refers to the mark indicated on the PCB to show whether a small PCB in the
array PCB is good, acceptable or defective. The bad mark is indicated for defective PCBs
while the Accept Mark is not indicated for defective PCBs. However, in the case of the
Accept Mark, part placement is performed only in the PCB with the Accept Mark.
If no small PCB proves to be defective in the array PCB, it is not necessary to set the
Accept Mark, which will otherwise waste time.
In such cases, if setup is performed to use a bad mark but it is not used, the machine will
6-34
Next Generation, Multi-Functional Placer DECAN S1 Administrator’s Guide
waste time checking for the existence of the bad mark.
When this <Accept Mark> button is clicked on, the following dialog box for the editing of
accept mark data is displayed.
Figure6.8 “Accept Mark Position” dialog box
<Block Select> combo box
For a Multi PCB
The model selected from the “Board Definition” dialog box is selected
automatically and the corresponding combo box is disabled.
For a Block PCB
Select the model for which setup will be performed and set other items.
6-35
Board Definition
<1.Use> check box
Set whether to use the Accept Mark.
<2. Mark Position> group
The Accept Mark position teaching result is inputted.
<3. Teach> group
Teach the Accept Mark position.
Procedure to teach the Accept Mark
Select the fiducial camera corresponding to the workstation to which a PCB is
loaded.
Click the <<Move> button to move to the position of the currently set Accept
Mark.
Perform adjustments so that the Accept Mark center falls on the crosshair center in
the SMVision window.
Click the <Get> button to input the current coordinate.
<4. Mark Type> group
Select the color of Accept Mark. Available mad mark colors are as follows;
Black: the mark appears darker than the surrounding.
White: the mark appears brighter than the surrounding.
<5. Search Area> group
Set the area to test the Accept Mark. The purpose is to limit the testing area when
recognition is interfered due to a shape similar to the mark near the mark.
<Width X> edit box
Set the range to test in X axis direction. In general, set to 6mm.
<Width Y> edit box
Set the range to test in Y axis direction. In general, set to 6mm.
<6. Mark Size> group
The size of the Accept Mark is displayed.
<Size X> edit box
The horizontal size of the Accept Mark is displayed. The size is changed based on
the value set in the <Width X> edit box of <5. Search Area> group.
<Size Y> edit box
The vertical size of the Accept Mark is displayed. The size is changed based on
the value set in the <Width Y> edit box of <5. Search Area> group.
<7. Parameter> group
<Threshold> edit box