Is ʼInterference Detectionʼ a tool used to find overlapping parts in SolidWorks?

ByCADbrief Staff

Short Answer

Yes — in SolidWorks, Interference Detection is the standard tool used to find overlapping parts in assemblies. The most common professional method is to run it from the Evaluate tab and review detected interferences with options like treating coincident faces as interference. It only works reliably on resolved assembly geometry.

What You Need to Know Before

Warning: Interference results can be misleading if components are lightweight, suppressed, or not fully rebuilt. A very common failure is missing small overlaps because the assembly is not resolved or because coincident faces are excluded from detection.

How to…

  • Command: Interference Detection

  • Shortcut: No default keyboard shortcut

  • Quick Steps:

    1. Open the assembly, then go to the Evaluate tab on the CommandManager and click Interference Detection.
    2. In the PropertyManager, select the components or check the full assembly, then enable a real option such as Treat coincidence as interference if needed.
    3. Click Calculate and review the interfering component pairs and interference volume results.

Variables & Settings

  • Key Setting: Treat coincidence as interference

    This option controls whether touching faces are reported as interference. Professionals enable it when checking tight packaging or clearance-critical assemblies, but leave it off when simple face contact is acceptable by design.

Why it Fails

  • Cause 1 (Geometry): Imported or faulty bodies with gaps, bad faces, or non-manifold geometry can prevent accurate interference calculation.
  • Cause 2 (layers/Locks): Lightweight, suppressed, or hidden components in the assembly state may not be evaluated as expected during the check.
  • Cause 3 (Command/Logic): The tool detects physical overlap, but it does not replace clearance analysis when parts are very close without actually intersecting.

Quick Fix & Best Practice

  • Quick Fix: Resolve all lightweight components, rebuild the assembly, then rerun Interference Detection with Treat coincidence as interference enabled if contact conditions matter.
  • Manager’s Verdict: Use Interference Detection for final assembly validation and clash checks, but avoid relying on it alone when you also need minimum-gap or motion-based clearance verification.

FAQ

Can Interference Detection work on part files?
No, it is mainly used in assemblies or multibody part contexts.

Does Interference Detection show contact without overlap?
No, not unless coincidence is specifically treated as interference.

Can I check only selected components for overlap?
Yes, you can limit the analysis to selected parts or subassemblies.

.

Related Posts: