Footprint Model

Parent page: Managed Domain Models

From a designer's perspective, a managed component (Component Item) 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 managed 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 managed content server, caters for the ability to create and manage Footprint Items in that Server. Such Items are created directly within the Server. Once a Footprint Item has been created (and data released into a revision of it), and its lifecycle state set to a level that the organization views as ready for use at the design level, it can be reused in the creation of one or more managed 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 Footprint Items, you can specify the folder's type. This has no bearing on the content of the folder - releasing a PCB 2D/3D component model will always result in a corresponding Footprint Item. It s imply provides a visual 'clue' as to what is stored in a folder and can be beneficial when browsing a Server for particular content. To nominate a folder's use as a container for Footprint Items, 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 Server!

Item 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 Item type will be available from the right-click context menu when creating the Item.

Creating a Footprint Item within a Footprints folder - the correct Content Type is available on the context menu.

Releasing a PCB 2D/3D Component Model

Related page: Creating and Editing Items Directly through a Server

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

A PCB 2D/3D component model can be edited and released into the initial revision of a newly-created Footprint Item, courtesy of the Server's support for direct editing. Direct editing frees you from the shackles of separate version-controlled source data. You can simply edit a supported Item type using a temporary editor loaded with the latest source direct from the Server itself. And once editing is complete, the entity is released (or re-released) 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 managed content server handles it all, with the same great integrity you've come to expect, and in a manner that greatly expedites changes to your data.

When you create a Footprint Item, you have the option to edit and release a PCB 2D/3D component model into the initial revision of that item, after creation. To do so, enable the option Open for editing after creation, 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-001-0002-1.PcbLib).

Example of editing the initial revision of a Footprint Item, directly from the managed content server - 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 the 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 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 releasing to the managed content server.
•  - Release Document. Use this button to release (effectively save and release) the defined PCB 2D/3D component model to the managed content server, storing it within the initial (planned) revision of the target Footprint Item. The Create 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 release. The library document containing the source PCB 2D/3D component model, *.PcbLib, will be stored in the revision of the Item.
•  - Cancel Editing. Use this button if you wish to cancel editing. The document and editor will close, and nothing will be released to the target Footprint Item.

These controls are also available as commands - Save (Shortcut: Ctrl+S), Release to Server (Shortcut: Alt+Ctrl+S), and Cancel Edit - from the main File menu.

The released data stored in the Server 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 to see the model graphics.

Browse the released revision of the Footprint Item, back in the Explorer panel. Switch to the Preview aspect view to see the model graphics.

Reusing a Managed Footprint Item

Related page: Managed Components, Controlling Access to Server Content

Once a PCB 2D/3D component model has been released to a managed content server, 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 mor e managed components . When directly editing a revision of a Component Item from a managed content server, how a Footprint Item revision is added for use, depends on which mode of editing is being used:

• Single Component Editor - the Footprint Item revision is added to the component's Models region. Use the drop-down associated to 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 Item revision.

Example of referencing a revision of a Footprint Item as a model link, when direct editing the revision of a Component Item (managed component) using the Single Component Editor.

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

• Batch Editor - the Footprint Item 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 Item revision.

Example of referencing a revision of a Footprint Item as a model link, when direct editing a revision of a Component Item (managed component) using the Batch Editor.

Re-Releasing a Footprint Item

At any stage, you can come back to any revision of a Footprint Item in the Server, and edit it directly. Simply right-click on the revision 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 commit the release of the document into the next revision of the item.

Accessing the command to launch direct editing of an existing revision of a Footprint Item.

Updating Related Component Items

When you make a change to a managed domain model - be it a symbol, footprint model, or simulation model - the moment you release that change into a new revision of the model's Item, any Component Item revisions 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-release those components, with the respective model links updated to use the latest revisions available. To streamline this process, a managed content server, in conjunction with Altium NEXUS, facilitates the ability to update related Component Item revisions - at the point of re-releasing a model Item - after having made any modifications to that model through the direct editing feature.

The option to perform this update to the parent Component Item revisions, can be found in the Create Revision dialog, that appears when releasing the modified model back to the target managed content server. This option - Update items related to <ModelItemRevision> - is enabled by default.

Accessing the option to update related Component Item revisions, that are referencing the Footprint
Item being re-released.

Once you click OK in the Create Revision dialog, the modified model is released back to the Server, and its associated temporary editor closed. What happens next depends on how many Component Item revisions are involved in the update:

• Single Component Item Revision - the revision of the component is opened in the Single Component Editor (for direct editing), with the latest revision of the just-released Footprint Item loaded (referenced) ready.

Example of pushing a change made to a Symbol Item, through to a single Component Item Revision that references it.

• Multiple Component Item Revisions - the revisions of the components are opened in the Batch Component Editor (for direct editing), presenting the following:
  • Definitions for all components that are associated to (reference) the Footprint Item.
  • The Model Links region shows the latest (just released) revision for that Footprint Item.
  • The entry for the linked model - in the applicable Models field of each component definition - is set to use that latest revision of the just-released Footprint Item.

Example of pushing a change made to a Footprint Item, through to multiple Component Item Revisions that reference it.

Unless you need to make any further adjustments, click the  button (on the Quick Access Bar, or from the PCB Lib Standard toolbar), to release the modified component(s) into new revision(s) of the corresponding Component Item(s), back in the target Server:

• If only a single Component Item Revision is affected, the Create Revision dialog will appear. Change Name, Description, and add release notes as required. After clicking OK, the release will proceed, and the temporary Single Component Editor then closed.
• If multiple Component Item Revisions are affected, the Release Manager dialog will appear. This lists all component Items that are scheduled to be released - by default all enabled for inclusion in the release. Make any changes - to Name, Description, and inclusion (Enable option) - as required, then click the Release Items button. View the impending release changes in the subsequent Confirm Release dialog, then click OK. Once the release process completes - indicated by Release Successful in the applicable Action-Status field(s) - close the dialog. The temporary Batch Component Editor will also then be closed.

Downloading Released Data

Download the data stored in a revision of a Footprint Item by right-clicking on that revision 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.

Migrating Existing Model Libraries

Main page: Streamlined Migration of Existing Libraries to Your Managed Content Server

Models can also be created in the managed content server as part of migration of existing libraries of components. Altium NEXUS, in conjunction with your managed content server, provides a streamlined, simple process to quickly migrate your existing libraries to that Server. The GUI to this process - the Library Migrator view - presents an intuitive flow that takes initial selected libraries, and migrates them to a target managed content server. 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 set of Server-based managed components, and the many benefits that such components enjoy (high-integrity, lifecycle management, centralized storage and management, where-used functionality, ease of design resuse). And while the migration process can be configured - giving you enhanced control over how that migration is performed - at its most simplistic, you can accept the default settings and set the migration in motion within a matter of clicks.

While access to the Library Migrator is available in Altium NEXUS, should you wish to access an unmanaged library to make pre-migration tweaks, or access the Available Libraries list, you will need to enable the use of legacy, unmanaged component management methodologies, as well as the Libraries panel. Use of unmanaged content is disabled by default in Altium NEXUS, as it is not recommended. You can restore this functionality by enabling the following options in the Advanced Settings dialog - accessed by clicking the  button, on the System - General page of the Preferences dialog:

• Legacy.UnManagedLibraries
• Legacy.LibraryPanel

You will need to restart Altium NEXUS for the changes to these settings to take effect.

All information that is present in an original source library is migrated, in order to arrive at a folder of unified components (managed components that have assigned part choices), with all referenced domain models (schematic symbols, PCB footprints, 3D Models, Simulation Models), and parametric information. Component templates can even be created, and used to create those managed components. And if your original components have multiple PCB footprints defined, you can rest assured that the Library Migrator will bring those models across, and keep the current default footprint too.

And if you only work with PCB libraries - your only concern is PCB layout - then the Library Migrator supports migration of just those libraries only.

The Library Migrator view - the user interface to the component migration process.