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Boeing 737 Start Switch - Servo Operated

This page is split into three main sections:

Parts Guide

Print Guide

Build Guide

Our 3D Printer of choice right now is the CREALITY CR10 v3

Great print & build quality for the price, Silent and Has a bigger Print bed of 300 x300mm. Karl personally recommends it for his sim build.

Karl's Second cheaper choice is the CREALITY ENDER 3 v2. Smaller printer bed of 220 x220mm. But performs excellently and has a purchase price of around $200.

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This design is a remake of my old design, but this time inspired by Mickey's flightdeck Youtube video:
https://youtu.be/I7Kqpa-pmkg

The use of an MG90S micro servo instead of an inductive load such as a solenoid was genius and in my opinion a massive step forward and now the only way ahead! We can forget about the weak acting and high current solenoids, remove the reverse bias diodes and relays. This design is:

Simpler
Stronger
Uses less current
Does not require a separate different voltage supply

My new design consists of 6 simple 3d printed parts, including the knob. These are quick to print and assemble. You will require some extra hardware, please see below in the component parts section.

The unit can now be affixed to the panel by the same nut used for the rotary switch, it's the imperial version that comes with most switches. Or you can attach the unit by the 4 attachment holes in the upper case assembly.

This design requires a print size of 220mm x 220mm.

 

General Information:

Parts Guide:

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Compression Spring

Compression Spring. 6.5/7mm x 15mm. Qty 1

Dome Head
Machine Screws

M3 X 8MM QTY 7

1P8T Rotary Switch

Single Pole, 8 Position. 45 Degree Switch with 'D' Shaft

MG90S Mini Servo

Metal geared, Super strong. They come with the servo arms and mounting hardware. You only require 1 per switch.

You are going to need the following items to complete this build:

 
 
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Print Guide

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01 Actuator Rod

Support: On

Qty: 1

Adhesion: Skirt

Nozzle: 0.4mm

Speed: 40mm/s

Layer Height: 0.2mm

Infill:100%

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05 BasePlate

Support: Off

Qty: 1

Adhesion: Skirt

Nozzle: 0.4mm

Speed: 40mm/s

Layer Height: 0.2mm

Infill:25%

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02 Upper Case

Support: On

Qty: 1

Adhesion: Skirt

Nozzle: 0.4mm

Speed: 40mm/s

Layer Height: 0.2mm

Infill:25%

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06 Knob

Support: On

Qty: 1

Adhesion: Skirt

Nozzle: 0.4mm

Speed: 40mm/s

Layer Height: 0.2mm

Infill:25%

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03 Lower Case

Support: On

Qty: 1

Adhesion: Skirt

Nozzle: 0.4mm

Speed: 40mm/s

Layer Height: 0.2mm

Infill:25%

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04 Actuator Cam

Support: On

Qty: 1

Adhesion: Skirt

Nozzle: 0.4mm

Speed: 40mm/s

Layer Height: 0.2mm

Infill:25%

 
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Build Guide

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