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Avery J. Parker Practical maker tech — AI tools, 3D printing, Raspberry Pi & ESP32

Project · Advanced · CNC

Building a Custom CNC with ESP32 and 3D Printed Parts

· 3D Printing , ESP32

When 3D-printed structure is fine, when it isn’t, and how an ESP32/GRBL-class controller fits a small CNC/plotter build.

Written by

Avery J. Parker

IT veteran, maker educator, and author of Network Ninja, 3D Printing Mastery, and AI Workflow Mastery. Business IT: Diversified Tech Solutions.

Project template

  • Goal & materials
  • Steps / firmware
  • Troubleshooting
  • AI assist notes
  • Related gear & books
Free starter kit Gear shortlist

Small CNC / pen plotter / laser-ish frames are a rite of passage. ESP32-based motion controllers and printed brackets make prototypes cheap — if you respect forces.

Depth checklist: materials → steps → troubleshooting → AI assist → related gear/books. See also the gear shortlist and free ESP32 kit.

Print what makes sense

Light CNC frame with ESP32 motion control and 3D-printed mounts — PETG preferred for stress parts.
Light CNC frame with ESP32 motion control and 3D-printed mounts — PETG preferred for stress parts.
  • Good: cable chains guides, motor mounts for light loads, belt tensioners, electronics trays
  • Risky: long unsupported beams, high-torque gear reductions in PLA
  • Prefer PETG/ABS/ASA for anything near heat or continuous stress

Controller notes

  • GRBL-class firmwares on ESP32 are common for light machines
  • Separate motor power from logic power
  • Emergency stop that actually cuts motor power

Build sequence

  1. Square frame + free motion by hand
  2. One axis homing
  3. Calibration (steps/mm) with a ruler, not vibes
  4. Only then: spindle/laser duty with enclosures and eye safety

Related: Pi as printer brain, 3D Printing Mastery.

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