Dynamic Motor and Prop Balancer
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© Mark Qvale - November, 2017
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| A new tool! |
Introduction
This project was actually done some years ago by some great posters on RCGroups and DoItYourselfDrones. Please see the Acknowledgements section at the bottom of this page. You can (& must!) read the original threads at these two links:
Basically, this is a dynamic balancer for motors and props that can be built for $60 or less. In the original write-ups there are two versions of the control board and firmware but this build only covers the version that uses the Teensy micro-controller.
Parts
The purchased parts listed here are what I chose for this project. There are veriations of most of these you can see on the RCGroups thread. If you do choose different components, keep in mind your particular wiring may change and this information too can be found on the thread. The first five parts include links to where I bought them.
Purchase Parts
- Teensy USB Board, Version 3.2
- 3-Axis ADXL345 Digital Acceleration Module
- QEE123 - Plastic Infrared Light Emitting Diode
- QSE159 - Silicon Photosensor
- 300g Gimbal cushions
- 56 ohm 1/4 watt resistor
- 100 ohm 1/4 watt resistor
- 10K ohm 1/4 watt resistor
- Standard Red LED
- 50mm x 60mm Hobby Board
- Pin Headers
Make Parts
The "make" parts listed below include three 3D printed parts, a simple flate piece motor mount, the control board and a wood base. You are certainly free to change any of this and there are many versions of all of these pieces found on the thread. The STL print files can be found near the bottom of this page under "3D Print Parts".
- Photo Sensor mount
- Cushion Bases
- Balance platform
- Motor mount plate
- Teensy control board
- Wood base
My Build
IR Photo-sensor Mount
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Cushion Base
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Balance Platform
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Wiring
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| The complete wiring diagram with Adafruit ADXL345 |
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| My control board |
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| My control board wiring (top view) |
Videos
The following excellent videos are provided by cyborgcnc:
Acknowledgements
Enormous thanks to the following folks who clearly spent a lot of time working to get this all working superbly!:
- Frank Al (diydrones 10/2012)
- The original creator of the DPB, initial softwares and first projects around this awesome, incredibly useful tool.
- cyborgcnc (RCGroups 01/2015)
- This poster has graciously supplied all the information I needed, firmware for the control board and extremely well done user interface for this project.
- adolfotregosa (RCGroups 03/2015)
- Provided great insight and help with development of the final software.
- lasakro (RCGroups 09/2015)
- Also provided lots of good insights and pictures of his work.
There are many more who contributed and are still developing but these four had the most influence on my particular build.
See Also
TBA
