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Design and build a robotic arm with no CAD experience

A builder used Claude Code with FreeCAD and Claude Vision to design, print, and assemble a 5-DOF servo arm with vision and voice control.

Time saved
Not reported
Setup time
Not reported
Running cost
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Cost range
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Use case overview

A builder used Claude Code with FreeCAD and Claude Vision to design, print, and assemble a 5-DOF servo arm with vision and voice control.

Reported experience

  1. What they did

    Claude Code wrote one Python macro that FreeCAD re-rendered live, building every part of the arm from boolean operations. The builder iterated by conversation, then printed and assembled the arm. For control, a laptop script sent Whisper speech and a webcam frame to Claude Vision. Claude returned JSON actions, local inverse-kinematics code converted target pixels to servo angles, and an ESP32 drove the servos.

  2. How it went

    About 30 hours from design to assembly produced four working servos. The gripper is not built, there is no feedback loop, and the pixel-to-world calibration is only approximate.

  3. Worth knowing

    Expect print fixes. The builder taped two servos, glued a lid, reprinted the base turntable, and replaced a failed print-in-place hinge. FreeCAD's macro runner also needs ASCII-only scripts.

Example prompts

Try with Claude Code
Help me design a [N]-DOF robotic arm from scratch using FreeCAD via MCP, including part files ready for 3D printing and a servo control script, even though I have no CAD experience. Guide me through printing, assembly, and wiring, stopping to confirm before any step that involves ordering parts.
Coding · Advanced
  1. Write migration plan
  2. Agent edits in batches
  3. Tests per batch

Ship a 40-file refactor with a coding agent

Plan, execute and review a cross-cutting refactor in small batches, with Claude Code making the edits and GitHub Copilot reviewing each PR.

Claude Code · GitHub Copilot
Coding · Advanced
  1. Run coverage
  2. Pick 3 riskiest files
  3. Write + run tests

Generate missing unit tests for untested modules

Claude Code reads your coverage report, picks the riskiest untested modules and writes unit tests that pass, one small PR at a time.

Claude Code · GitHub Copilot · Slack