有時候，做元件封裝的時候，做得不是按中心設置為原點（不提倡這種做法），所以制成之后導出來的坐標圖和直接提供給貼片廠的要求相差比較大。比如，以元件的某一個pin 腳作為元件的原點，明顯就有問題，直接修改封裝的話，PCB又的重新調整。所以想到一個方法：把每個元件所有的管腳的X坐標和Y坐標分別求平均值，就為元件的中心。
對于大部分元件應該都是完全正確的。但也有小部分可能稍微有點偏差，比如三極管、管腳間距不完全相等的繼電器，當然這部分是很少很少的部分，而且也偏差不大。貼片廠貼片都會檢查一下，特別是不規則的封裝，也無法認定中心應該設置在哪。不要偏差太大，即可以稍微調整。
 
把以下代碼另存為*.bas文件，然后在PADS Layout中導入。導入方法：tools——）Basic Script——）Basic Script——）Load file，把保存的.bas文件導入即可。然后點擊run，方法和運行原來就有的我文件一樣。
 
 
Sub Main
' Open temporarly text file
Randomize
filename = DefaultFilePath & "\tmp"  & CInt(Rnd()*10000) & ".xls"
Open filename For Output As #1
 
 
 
' Output Headers
Print #1, "PartType"; Space(32); 
Print #1, "RefDes"; Space(24); 
Print #1, "PartDecal"; Space(32); 
Print #1, "Pins"; Space(6); 
Print #1, "Layer"; Space(26); 
Print #1, "Orient."; Space(24); 
Print #1, "X"; Space(30); 
Print #1, "Y"; Space(29); 
Print #1, "SMD"; Space(7); 
Print #1, "Glued"; Space(0)
 
' Lock server to speed up process
LockServer
 
' Go through each component in the design and output values
For Each nextComp In ActiveDocument.Components
 
   Dim centerX  As Single
   Dim centerY  As Single
   Dim cout  As Integer
   centerX = 0.0
   centerY = 0.0
   cout = 0
    
Print #1, nextComp.PartType; Space$(40-Len(nextComp.PartType)); 
Print #1, nextComp.Name; Space$(30-Len(nextComp.Name)); 
Print #1, nextComp.Decal; Space$(40-Len(nextComp.Decal)); 
Print #1, nextComp.Pins.Count; Space$(10-Len(nextComp.Pins.Count)); 
Print #1, ActiveDocument.LayerName(nextComp.layer); Space$(30-Len(ActiveDocument.LayerName(nextComp.layer))); 
Print #1, nextComp.Orientation; Space$(30-Len(nextComp.Orientation)); 
 
For Each nextCompPin In nextComp.Pins
centerX = centerX+nextCompPin.PositionX 
centerY = centerY+nextCompPin.PositionY 
Next nextCompPin
centerPositionX = Format$(centerX/(nextComp.Pins.Count), "#.00")
centerPositionY = Format$(centerY/(nextComp.Pins.Count), "#.00")
 
Print #1, centerPositionX;      Space$(30-Len(nextComp.PositionX)); 
Print #1, centerPositionY;      Space$(30-Len(nextComp.PositionY)); 
Print #1, nextComp.IsSMD; Space$(10-Len(nextComp.IsSMD)); 
Print #1, nextComp.Glued; Space$(10-Len(nextComp.Glued))
Next nextComp
 
' Unlock the server
UnlockServer
 
' Close the text file
Close #1
 
' Start Excel and loads the text file
On Error GoTo noExcel
Dim excelApp As Object
Set excelApp = CreateObject("Excel.Application")
On Error GoTo 0
excelApp.Visible = True
excelApp.Workbooks.OpenText  FileName:= filename
excelApp.Rows("1:1").Select
With excelApp.Selection
.Font.Bold = True
.Font.Italic = True
End With
excelApp.Range("A1").Select
Set excelApp = Nothing
End
 
noExcel:
' Display the text file
Shell "Notepad " & filename, 3
 
End Sub