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How to check a part for overhangs and thin walls with SOMA

Run the analysis tools on a model to find overhangs, thin walls and weak spots before printing.

Who it is forA 3D printing hobbyist about to print a functional part who wants to catch problems first.

The problemFailed prints from unsupported overhangs or thin walls waste material and time.

The outcomeA list of printing and strength issues the agent can fix in the model code before you print.

What you need first

  • Windows, Linux, or macOS (Apple Silicon) with a SOMA package downloaded from somacad.app/download or the releases page
  • A CLI agent such as Claude Code, OpenCode, Codex CLI or Gemini CLI, installed and logged in by you
  • About 1 GB of free disk space for the installed app

Steps

  1. Open the model in SOMA and make sure the agent has built it.
  2. Ask the agent to analyze the part for overhangs and wall thickness.
  3. Run soma analyze to get the analysis results.
  4. Send the results back to the agent and ask for changes to the flagged areas.
  5. Export the updated model as STL or 3MF.

Prompt for your agent

In the SOMA model folder for <model name>, run `soma analyze` on the model and list every overhang and wall thinner than <minimum wall thickness> millimeters. Propose code changes for each issue, then run `soma build` and confirm the build still succeeds.

Caveat. The README lists analysis for overhangs, wall thickness and FEM strength, but it does not say how accurate the results are, so check important parts yourself.

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