Is the ʼAuto-Balloonʼ tool used for labeling parts in an assembly drawing in SolidWorks?

ByCADbrief Staff

Short Answer

Yes, in SolidWorks, the Auto Balloon tool is the standard way to label parts in an assembly drawing quickly and consistently. The most common professional method is to place a drawing view, then run Auto Balloon from the Annotations tools to generate item balloons linked to the bom. It only works properly when components are correctly included in a bill of materials.

What You Need to Know Before

Warning: Auto-balloons can place incorrect or incomplete item numbers if the assembly view is not tied to the right BOM or if components are excluded from the BOM. A very common failure is ballooning a view before the BOM table and item numbering are fully finalized.

How to Use Auto Balloon in SolidWorks

  • Command: Auto Balloon

  • Shortcut: No default keyboard shortcut

  • Quick Steps:

    1. In a drawing of an assembly, go to the Annotations toolbar or Insert > Annotations > Auto Balloon.
    2. Select the drawing view you want to balloon, then choose a layout such as Around, Top, or Right in the PropertyManager.
    3. Turn on a real option such as Ignore multiple instances if needed, then click OK to place the balloons automatically.

Variables & Settings

  • Key Setting: Ignore multiple instances

  • Expert Setting: This option prevents SolidWorks from placing repeated balloons on identical components shown multiple times in the same view. It helps keep assembly drawings cleaner, especially on dense mechanical layouts.

Why it Fails

  • Cause 1 (Geometry): Components may be hidden, suppressed, or not clearly visible in the selected drawing view, so balloons are skipped or placed poorly.
  • Cause 2 (layers/Locks): Balloons may be created on a hidden annotation layer or a controlled drawing format layer, making them appear missing.
  • Cause 3 (Command/Logic): Auto Balloon depends on BOM item numbering; if no BOM exists, or the view is linked to the wrong configuration, the labels will not match the intended parts list.

Quick Fix & Best Practice

  • Quick Fix: Insert or rebuild the BOM first, confirm the correct assembly configuration, then rerun Auto Balloon on the target drawing view.
  • Manager’s Verdict: Use Auto Balloon for fast first-pass labeling on production assembly drawings, but always review and manually adjust crowded areas before release.

FAQ

Can Auto Balloon work without a BOM in SolidWorks?
It can place balloons, but proper item-number control is most reliable when a BOM is present.

Can I rearrange balloons after using Auto Balloon?
Yes, you can drag and adjust individual balloons manually after placement.

Does Auto Balloon label every part in every view?
No, it only balloons components visible and eligible in the selected drawing view.

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