Footprint Model

Parent page: Workspace Content Types

From a designer's perspective, a Workspace component gathers together all information needed to represent that component across all design domains, within a single entity. It could therefore be thought of as a container in this respect – a 'bucket' into which all domain models and parametric information is stored. In terms of its representation in the various domains, a component doesn't contain the domain models themselves, but rather links to these models. These links are specified when defining the component.

Altium NEXUS, in conjunction with your connected Workspace, caters for the ability to create and manage footprints (Footprint Items) in that Workspace. Such footprints are created directly within the Workspace. Once a footprint has been created (and data saved into a revision of it), it can be reused in the creation of one or more components.

PCB Domain Terminology

Before taking a look at the process of releasing a PCB 2D/3D component model, it is worth taking a moment to become familiar with the related terminology involved. In the past, items within a PCB Library have been generically referred to as Footprints, however this term is no longer strictly correct in the present-day context. Altium NEXUS includes capabilities that allow designers to model both the footprint (land pattern) of the component as well as its 3D physical shape.

The following terminology is used to distinguish elements within the PCB domain:

• Model – a generic term that refers to any domain-specific representation of a component that is useful when analyzing or working with the component in a specific context.
• Footprint – a model that refers to the two-dimensional pattern of copper, masks, and overlays that describe the area on the PCB where the physical component will be mounted.
• 3D Body – a model that refers to the three-dimensional representation of the physical component to be mounted on the PCB.
• PCB Component – a complete PCB domain model of the component that includes its Footprint and 3D Body. This can also be more fully referred to as the PCB 2D/3D Component model.

Designers are encouraged to adopt a similar vocabulary to ensure minimal confusion between the different descriptive terms.

Folder Type

When creating the folder in which to store footprints, you can specify the folder's type. This has no bearing on the content of the folder – saving a PCB 2D/3D component model will always result in a corresponding Footprint Item. It simply provides a visual 'clue' as to what is stored in a folder and can be beneficial when browsing a Workspace for particular content. To nominate a folder's use as a container for footprints, set its Folder Type as Footprints, when defining the folder properties in the Edit Folder dialog.

Specifying the folder type – its intended use – gives a visual indication of the content of that folder when browsing the Workspace.

Content Type

When creating a target Footprint Item in which to store your PCB 2D/3D component model, ensure that its Content Type is set to Footprint, in the Create New Item dialog. If you are creating the Item in a Footprints type folder, this content type will be available from the right-click context menu when creating the Item.

Creating a footprint within a Footprints folder – the correct Content Type is available on the context menu.

Saving a PCB 2D/3D Component Model

Related page: Creating and Editing Content Directly through a Workspace

So far, we've discussed the support for a footprint in the Workspace, in terms of related folder and content types. Saving an actual defined PCB 2D/3D component model into a revision of a Footprint Item can be performed in a streamlined way.

A PCB 2D/3D component model can be edited and saved into the initial revision of a newly-created Footprint Item, courtesy of the Workspace's support for direct editing. Direct editing frees you from the shackles of separate version-controlled source data. You can simply edit a supported content type using a temporary editor loaded with the latest source direct from the Workspace itself. And once editing is complete, the entity is saved (or re-saved) into a subsequent planned revision of its parent Item, and the temporary editor closed. There are no files on your hard drive, no questioning whether you are working with the correct or latest source, and no having to maintain separate version control software. The Workspace handles it all, with great integrity, and in a manner that greatly expedites changes to your data.

When you create a Footprint Item, you have the option to edit and save a PCB 2D/3D component model into the initial revision of that Item, after creation. To do so, enable the Open for editing after creation option, at the bottom of the Create New Item dialog (which is enabled by default). The Item will be created and the temporary PCB Library Editor will open, presenting a .PcbLib document as the active document in the main design window. This document will be named according to the Item-Revision, in the format: <Item><Revision>.PcbLib (e.g. PCC-001-0001-1.PcbLib).

Example of editing the initial revision of a footprint, directly from the Workspace – the temporary PCB Library Editor provides the document with which to define your PCB 2D/3D component model.

Use the document to define the PCB 2D/3D component model as required. For more information on doing this, see Creating a PCB Footprint.

There are three relevant controls when direct editing, readily available from the Quick Access Bar (at the top-left of the main application window), or from the PCB Lib Standard toolbar:

• – Save Active Document. Use this button to locally save any changes made to the document. This allows you to save current changes, should you wish to come back at a later stage to make further changes before ultimately saving to the Workspace.

• / – Save to Workspace. Use this button to save the defined PCB 2D/3D component model to the Workspace, storing it within the initial (planned) revision of the target Footprint Item. The Edit Revision dialog will appear, in which you can change Name, Description, and add release notes as required. The document and editor will close after the save. The library document containing the source PCB 2D/3D component model, *.PcbLib, will be stored in the revision of the Item.

  A Save to Server control is also conveniently provided to the right of the PCB 2D/3D component model's entry, within the Projects panel itself.
• / – Discard Local Changes. Use this button if you wish to cancel editing and discard any changes made. The document and editor will close, and nothing will be saved to the target Footprint Item.

These controls are also available as commands – Save (shortcut: Ctrl+S), Save to Server (shortcut: Ctrl+Alt+S), and Discard Local Changes – from the main File menu and from the right-click menu of the PCB 2D/3D component model's entry in the Projects panel.

The saved data stored in the Workspace consists of the source PCB 2D/3D component model, saved in a PCB Library file named using the Footprint Item's Name. In the Explorer panel, switch to the Preview aspect view tab to see the model graphics.

Browse the saved revision of the footprint, back in the Explorer panel. Switch to the Preview aspect view tab to see the model graphics.

Reusing a Footprint

Related pages: Components, Controlling Access to Workspace Content

Once a PCB 2D/3D component model has been saved to a Workspace, and its lifecycle state set to a level that the organization views as ready for use at the design level, that model can be reused in the creation of one or more components. When directly editing a revision of a component from a Workspace, how a footprint revision is added for use, depends on which mode of editing is being used:

• Single Component Editing – the footprint revision is added to the component's Models region. Use the drop-down associated with the Add Footprint entry to choose the Existing command. An explorer-like dialog will open, with which to browse to, and choose, the required footprint revision.

  
  Example of referencing a footprint revision as a model link, when direct editing a revision of a component using the Component Editor in its Single Component Editing mode.

  You can edit a footprint revision directly from the Models region by clicking the button, at the top-right of the model preview.

• Batch Component Editing – the footprint revision is added to the component's Model Links region. This region can be thought of in terms of a 'bucket' of domain models that can be accessed by any component definition. Assignment is a case of specifying which links are required for each definition. Click the Add control beneath the region and choose the PCBLIB entry. The Choose Models dialog will open (essentially an incarnation of the Explorer panel), with which to browse to, and choose, the required footprint revision.

  
  Example of referencing a footprint revision as a model link, when direct editing a revision of a component using the Component Editor in its Batch Component Editing mode.

  You can edit a footprint revision directly from the Model Links region by right-clicking and choosing the Edit command from the context menu.

Re-Saving a Footprint

At any stage, you can come back to any revision of a footprint in the Workspace, and edit it directly:

• From the Explorer panel – right-click on the revision and choose the Edit command from the context menu.
• From the Components panel – select the Footprints category (the Models option must be enabled in the panel's menu for accessing this category), right-click on the entry for a footprint and choose the Edit command from the context menu.

Once again, the temporary editor will open, with the library (containing the source PCB 2D/3D component model) contained in the revision, opened for editing. Make changes as required, then save the document into the next revision of the footprint.

Accessing the command to launch direct editing of an existing footprint revision.

You can also update the revision of a footprint being used by a revision of a component directly on-the-fly, as part of editing that revision of that component. If the Component Editor is in Single Component Editing mode, edit a footprint revision directly from the Models region of the editor by clicking the button, at the top-right of the model preview. If the Component Editor is in Batch Component Editing mode, edit a footprint revision directly from the Model Links region by right-clicking and choosing the Edit command from the context menu.

Updating Related Component

When you make a change to a domain model – be it a symbol, footprint model, or simulation model – the moment you save that change into a new revision of the model, any components that use that model will become effectively out of date, still using the previous revision. In most cases, you will no doubt want to re-save those components, with the respective model links updated to use the latest revisions available. To streamline this process a Workspace, in conjunction with Altium NEXUS, facilitates the ability to update related components – at the point of re-saving a model – after having made any modifications to that model through the direct editing feature.

The option to perform this update to the parent components can be found in the Create Revision dialog, that appears when saving the modified footprint back to the target Workspace. This option – Update items related to <ModelItemRevision> – is enabled by default.

Accessing the option to update related components, that are referencing the footprint being re-saved.

Once you click OK in the Create Revision dialog, the modified model is saved back to the Workspace, and its associated temporary editor closed. All components referencing that footprint will be re-saved to use its new revision automatically (the next revision of each component is automatically created and the save performed).

Example of automatic update in action. Here, the pad shape for a footprint model has been changed. The component that references the footprint is automatically updated – re-saved into its next revision, to use the new revision of the footprint.

Downloading Saved Data

Download the data stored in a revision of a footprint by right-clicking on that revision (in the Explorer panel) and choosing the Operations » Download command from the context menu. The PCB Library file will be downloaded into a sub-folder under the chosen directory, named using the Item Revision ID. The file can be found in the Released folder therein.

Soft Deletion

When connected to a Workspace, flexible functionality is available for removing a footprint directly from within Altium NEXUS:

• From the Explorer panel – right-click on the footprint's entry in the panel and choose the Delete Item command from the context menu.
• From the Components panel – select the Footprints category (the Models option must be enabled in the panel's menu for accessing this category), right-click on the entry for a footprint and choose the Operations » Delete command from the context menu.

The Delete Items dialog will appear, in which to confirm the deletion. The action is actually a 'soft delete', whereby the footprint will be moved into the Trash area of the Workspace. The Trash is essentially a recycle bin into which any content within your Workspace can be moved (through a soft delete action). It is isolated from the rest of the Workspace.

Soft deletion of a footprint from within the Explorer panel. The footprint will be moved to the Workspace's Trash area.

To proceed with the deletion, click the button. The footprint will be removed and a Deletion Summary dialog will confirm successful deletion. If there was an issue with deletion, this will be flagged to you.

The content deleted in this manner can be found on the Trash page of the Workspace's browser interface. Note that you can only view the content that you have personally soft deleted. Administrators will be able to see the full content of the Trash page – so all content that has been soft deleted.

Things to consider in relation to a soft deleted footprint:

• The footprint will not be available from your design software, or from within the Web interface.
• Anywhere the footprint was being used will reflect that the footprint has been deleted.
• A footprint can be restored, or permanently deleted from the Trash page, provided you have editing rights. Permanent deletion is only possible provided it is not being used by a parent item.

Migrating Existing Model Libraries

Main page: Migrating Existing Libraries to Your Connected Workspace

Models can also be created in the Workspace as part of migration of existing libraries of components. Altium NEXUS, in conjunction with your connected Workspace, provides a streamlined, simple process to quickly migrate your existing libraries to that Workspace. The GUI to this process – the Library Migrator – presents an intuitive flow that takes initial selected libraries, and migrates them to your Workspace. Catering for all types of libraries relating to older component management methodologies – SchLib, PcbLib, IntLib, DbLib, SVNDbLib – the Library Migrator is the perfect solution to quickly building your company's Workspace component library so you can benefit from their many advantages – high-integrity, centralized storage and management, ease of design reuse, real-time supply-chain information.

The Library Migrator offers a minimalist Simple interface mode where the selected database and file-based component libraries are migrated to Workspace components through a single step, while the migrator automatically takes care of type classification, the target source folder, parameter inclusion and value type, and the transfer of all relevant data. The interface is also available in an Advanced mode that provides a full preview of the proposed library migration, and access to its related data and settings. And while the migration is a single-click process by default, the migrator also offers advanced configuration options through the Properties panel for enhanced control over exactly how that migration is performed.

While access to the Library Migrator is available in Altium NEXUS, should you wish to access a database or file-based library to make pre-migration tweaks, or access the Available Libraries list, you will need to enable the use of legacy component management methodologies. This functionality is disabled by default in Altium NEXUS, as it is not recommended. You can restore this functionality by enabling the Legacy.UnManagedLibraries option in the Advanced Settings dialog – accessed by clicking the button, on the System – General page of the Preferences dialog. You will need to restart Altium NEXUS for the change to this setting to take effect.

All information that is present in an original source library is migrated to the Workspace components, including all referenced domain models (schematic symbols, PCB footprints, simulation models), parametric information, assigned part choices, datasheet files, etc. Component Templates are also created where necessary, and may then be refined and used for subsequent library migrations. If your original components have multiple PCB footprints defined, the Library Migrator will bring those models across and keep the current default footprint. And if you only work with PCB libraries – your only concern is PCB layout – then the Library Migrator supports migration of just those libraries, or it can be switched to a models only migration mode where specified models types are migrated from integrated or database libraries. Libraries that include multiple component types (monolithic libraries) are automatically detected and processed as well.

The Library Migrator in its Advanced mode – the full user interface to the component migration process.