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The PCB Pad Via Templates panel is a specialized panel that lists the pad/via templates that are assigned to the current PCB document (Local), or those available from Pad Via Libraries that have been installed or included within the current design project (Available libraries).
The two sections presented in the panel can be summarized as:
The entries listed in the lower Local Pad & Via Library section of the panel represent the pad/via configurations (templates) assigned to the current board design. A preview of the selected template is shown at the bottom of the section.
The templates listed here represent Pads and Vias saved within the PCB file, and are not contained in a separately defined 'library' as such. A selected template can be reused in the current board as a new pad or via instance by dragging it onto the layout, or by selecting Place from its right-click context menu.
Since template names listed in the Local Library are derived from Pads and Vias in the current PCB layout, if all instances of a particular pad/via configuration have been deleted from the board, its corresponding template will be removed from the Local List.
However, if a placed Pad or Via has been sourced from a Pad Via Library, its template will be retained in the Local list when all instances of that pad/via have been deleted from the board – or changed to a different template type. Instances of Pad Via Library templates that are no longer required can be removed from the local ‘database’ record with the Remove Unused Pad/Via button.
The upper section of the panel, Available Pad/Via template Libraries, applies to the templates contained in the selected Pad Via Library – see below for more information. Templates from the selected library can be applied to the PCB by dragging, or via the right-click menu, as outlined above.
As with similar library panels, the current library file can be selected from the Library name drop down menu list, and a Library’s contents navigated through the associated Filter field.
Library based Pad/Via templates can also be added directly to the Local library list by right-clicking on the template name and selecting Add to Internal Library from the context menu, or by simply dragging the template from the panel’s Pad/Via library section to a blank area the Local library section.
This is equivalent to placing a pad/via sourced from Pad Via Library template, then deleting it from the board – thereby registering that template as locally available. To replace a local template, rather than add one to the local list, see Replace a Local Template further below.
Pad Via Library sourced templates that are available to the local document can be applied to Rules, configurations and defaults for the current project. When placing Via Stitching for example, the placed via characteristics are defined by the template selected in the Add Stitching to Net dialog – Tools » Via Stitching/Shielding » Add Stitching to Net.
A library based Pad/Via template can also replace a Local template, which will update Pads or Vias on the board that use the (local) template.
To do so, drag the desired library template from the Pad/Via Library section of the panel to the Local Pad & Via Library section of panel, but in this case, drop the library template on top of the existing local template entry. Any instances of free or component pads/vias that use the template will be updated to the new library template style.
In the below animated image, note that the design's
C5 component pads physically change to the type determined by the 'dropped' library template – from
r30_50, as also indicated by the Local library list.
The Update button in the PCB Pad Via Templates panel's Local section provides a method to update the Pad or Vias templates in the current design from their source.
For example, in the case of a Pad that has been placed from a Pad Via Library template and the source Library template has been subsequently updated, the Update function will pull in those template changes to the PCB – thereby updating all Pads that use the Library template.
The template update is configured by the Update Pad or Via dialog that opens when an update is instigated. This lists the details of the detected change(s) that will be applied.
Three update options are offered by the dialog to control the update process:
This synchronization behavior is established by the Library link property of Pad and Vias, as seen in the Pad/Via properties dialog. An indication that differences exist between the local version of the template and the source template is provided in the Changed column of the Pads/Vias section in the Pad & Via Templates mode of the PCB panel – see below.
An existing Pad Via Library is added to the project or Installed by clicking on the button to the right of the panel's Library name selector menu, which opens the Available Libraries dialog.
Use the Installed tab option to load an existing library (
*.PvLib) that will be available for all projects, and the Project tab to add an existing library to the current project.
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