Orbotech Symbion S36, Руководство программиста

Страница: 66 / 128

© Orbotech 2005 Symbion™ Programmer Guide 59
Draft - Confidential
Location Model
The
Location Model defines the rules to be applied when assessing the
placement accuracy of the component inspected.
The
Location Model may be one of two types; Box in Box and Point in Box .
The
Location Model is defined through the Property editor, in the Model
parameter of the Location inspection.
To select a Location Model ;
•
With a component selected, click on the
Inspections
tab in the Property
Editor
•
Click the expand icon by the Location item
•
Double click the Value drop down and select from the options
Box in Box 2D
Use the Box in Box method with a user defined
percentage off pad allowance
Box in Box 2D Class 1
Use the Box in Box method with an off pad allowance
according to IPC Class 1 (50% off the land)
Box in Box 2D Class 2
Use the Box in Box method with an off pad allowance
according to IPC Class 2 (50% off the land)
Box in Box 2D Class 3
Use the Box in Box method with an off pad allowance
according to IPC Class 3 (25% off the land)
Point in Box 2D
Use the Point in Box method with user defined X, Y and
Angle tolerances
None
The Location of the component will not be controlled
If the Location Model is set to None then regardless of the
accuracy of placement provided the component is fitted it will
pass.
Box in Box Location Models are not available for Inspection
Types without terminals, for example BGA