Boeing 737 EFIS V6 — CAD & STL (Backlit, Dual‑Axis Knobs, Push Function)

Digital download only — CAD, STL & DXF. No physical parts or electronics included.
Bring authentic Boeing 737 EFIS aesthetics to your home cockpit. This V6 release is the most refined version yet, shaped by months of testing and feedback from 737DIYSIM Patreons. The design splits into practical sub‑assemblies for easier printing and assembly, with fine‑tuned gearing and tolerances calibrated to print reliably on most well‑tuned machines.

✅ Best value tip: Choose the CAD package (not STL‑only) to adjust press‑fits (e.g., gear‑to‑shaft and shaft‑to‑spline) for your printer and material. It saves reprints and delivers a cleaner build.

What It Is (and Isn’t)

This download includes: CAD and STL files for the EFIS assembly, plus Laser DXF files for those who want to laser‑cut/engrave panels.
This download does not include: Any physical parts, electronics, PCBs, firmware, or pre‑assembled units.

Key Features

Backlit like the real aircraft
Designed for 12V LED strip backlighting and tactile illuminated buttons—to illuminate legends and text for an authentic look.
Note: Buttons/LEDs illuminate only; they do not display system status.

Highly functional control set in a compact form
Both upper knobs operate on dual axes, and all four knobs integrate a push function—an impressive amount of functionality in a small footprint.

Print‑friendly, builder‑friendly
The assembly is split into smaller modules to simplify printing, painting, wiring, and maintenance.
Gearing and tolerances have been iteratively tuned to work across a wide range of calibrated printers.

Material & process flexibility
Developed and proven on the Bambu X1. For stronger shafts, resin prints are recommended. (Mixed FFF + resin builds work great.)

Upgrade path for premium finish
For a professional look and perfect backlighting, consider our laser‑etched faceplates & buttons:
https://www.737diysim.com/product-page/efis-v6-laser-etched-faceplates
These are completely optional—the entire unit can be 3D printed for a budget‑friendly build.

Originality & Why It’s Essential
This EFIS V6 balances authentic visuals, clever mechanical design, and practical home‑builder constraints. The dual‑axis control layout with integrated push on each knob, plus backlit legends, delivers an immersive EFIS experience without complex electronics. It’s the first EFIS from 737DIYSIM that’s been battle‑tested for months by real builders, then refined so you can print, fit, and assemble with more predictability and fewer surprises.

Context of Use

Ideal for: Home cockpit builders seeking a realistic 737 EFIS look and tactile control set for their sim rig.
Typical setup: Print parts (FFF for structure, optional resin for shafts/gears), add 12V LED strip for backlight and tactile illuminated buttons for legend lighting. Pair with your preferred control electronics if you want interactivity (not included).
Finish options: Pure 3D‑printed build (budget‑friendly) or upgrade to laser‑etched faceplates and buttons for premium finish and superior backlighting.

Potential Limitations (Read Before Purchase)

Digital files only: No hardware, electronics, or PCBs included.
Illumination only: Backlighting and button illumination do not indicate system state; they illuminate legends for realism.
Fitting & tuning: Minor sanding/reaming may be needed depending on your printer, materials, and slicer.
Recommend CAD over STL‑only: Adjust press fits (gear‑to‑shaft, shaft‑to‑spline) to suit your exact printer/material.
Printer calibration required: Accuracy and smooth gearing rely on a properly calibrated machine.
Not an aviation part: For simulation use only; no affiliation with or endorsement by Boeing.

What’s Included

CAD files (for editable fit tuning)
STL pack (ready to slice)
Laser DXF files (for engraving/cutting faceplates)

Optional Laser‑Etched Faceplates & Buttons:
https://www.737diysim.com/product-page/efis-v6-laser-etched-faceplates

Build/Parts Guide:
https://www.737diysim.com/build-guides-1
Recommended Printing & Assembly Notes

Printers/Processes: FFF for main structure; resin recommended for shafts and small, high‑precision parts.
Materials: PLA/PETG for housings and panels; resin (tough engineering resin) for shafts/gears if possible.
Backlighting: 12V LED strip behind legends; ensure light‑blocking where needed for crisp text.
Knob mechanics: Ensure smooth axial rotation and reliable push action; test‑fit before final assembly.
Dry‑fit first: Verify gear mesh and shaft alignment before committing with adhesives or thread‑lock.