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    Custom footprints

    A custom footprint is a footprint that you design - generally because it does not already exist in the footprint library. You can create your own custom footprints and add them to the library. For example, you might need a custom footprint for an exotic connector you plan to use.

    You can create a custom footprint manually by creating pads, silk screen legends, etc.

    alt To create a custom footprint manually:
    1. Add the appropriate pad layout and other features (e.g. silk screen) to your design. To add pads use the pad tool or the multilayer pad tool.
    2. Group the elements together.
    3. Cut and paste as needed.

    You can create a new footprint based on an existing footprint.

    alt To create a custom footprint based on an existing footprint:
    1. Place the existing footprint.
    2. Select the footprint and choose Edit | Ungroup.
    3. Edit the footprint to add mounting holes, modify silk screen, change pad layout, re-number pads, etc.
    4. Group the elements together.
    5. Cut and paste as needed.

    You can create a footprint using a wizard for DIP, SIP, SO, BGA, QFP and Tabbed devices.

    alt To create a custom DIP, SIP, SO, BGA, QFP or Tabbed footprint:
    1. Review the component manufacturer's drawing of the component, noting the relevant dimensions.
    2. On the left  toolbar select the Footprint / Component tool. A dialog appears.
    3. Select the Composer tab.
    4. Choose an appropriate footprint type.
    5. Enter the footprint parameters and dimensions.
    6. Click "Place on board".
    7. To edit your footprint, follow  "To create a custom footprint based on an existing footprint" above starting from the step 2.

    footprint_composer

    You can add a custom footprint to the library to allow convenient selection in future designs.

    alt To add your custom footprint to the Component Library
    1. If your footprint is saved alone in a separate .pcb file, skip to step 10.
    2. Select your footprint and choose Edit | Copy.
    3. Choose File | New.... A dialog appears.
    4. Click OK.
    5. Choose Edit | Select | All.
    6. Choose Edit | Delete.
    7. Choose Edit | Paste.
    8. Choose File | Save and enter a meaningful name for your footprint file.
    9. Choose File | Close.
    10. In the left toolbar select the Footprint / Component tool. A dialog appears.
    11. Select the Footprints tab and Click Add...
    12. Select the file of your footprint.
    13. Enter a description for your footprint.
    14. Your footprint will appear under the My Footprints branch of the footprint tree.

    You can edit a custom footprint you previously added to the library. For example, you might need to make a change after testing a first run of boards.

    alt To change a custom footprint in the library:
    1. Edit the original footprint file.
    2. In the left toolbar select the Footprint / Component tool.
    3. Click Update...
    4. Select the original file you edited.
    5. Enter a new description for your footprint and click OK.

    You can propagate changes made to a footprint. For more information click here.

    See also: Custom footprints ... Design Tips ...Component assembly ... Deleting component designator ... Moving component designator ... Changing reference (insertion) point

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