Building Blocks of DIY Quadcopter: Introduction & Overview

Lately I got involved into another DIY project – A Quadcopter. It was during my exams I got into this xD. And it was during my exams I started researching on Quadcopter. Plenty of information is available on the Internet on multicopters. I had decided on using 9×4.7 Propellers since its going to be a Mid-Sized Quadcopter. So , ordered some Clockwise and Anticlockwise Slow Fly Propellors.

Clockwise Props:

Anticlockwise Props:

Also , what I found was that a motor having around 900 to 1200KV was a best fit for my project. KV is simply RPM per Volt. Like many others I too selected Turnigy 2215J-900KV Brushless DC Motor. The Quality and performance of these motors is top-notch considering the price. I ordered 5 of them from Hobbyking.

The package:

The motors:

Closeups:

Accessories:

Next was selecting proper ESC i.e Electronic Speed controller for these motors. As per the specs on Hobbyking these Motors draw upto 20 Amps at around 10-11 Volts. Most of the RC enthusisats select ESC which can handle around 5 to 7 Amps more than their Max requirment. Even I too Agree with this since Higher-AMP Rated ESCs will run much cooler so possibly will last longer. Its better to stay away with smoking ESCs. I selected HobbyKing Blue Series 30 Amp ESCs. I could have gone with 25 Amp ESC but the difference in price was very less hence decided to buy 30 Amp ones instead. Again like with the motors I ordered 5 of them.

Also ordered a Program Card suited for the ESCs I had ordered. Its sort-of necessary to change the ESC parameters for multicopters.

Ill be KK-Multirotor controller since I am a “First Timer”. Planning to use 4AH Lipo Battery for the Quadcopter but not fixed yet. First want a get a prototype ready which will be powered by a bench PSU which I generally use for my Hexapod and other stuff.

At this very moment I’m working on the Frame using Aluminum Extrusions and fasteners.

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DIY CNC Interval 1: Inception

I had originally thought(not planned) of building a CNC Machine back in 2011 .. but then it was just in my head since I was noob in mechanical stuff. Frankly speaking at that time I didnt even knew what is a lead screw , linear bearing , coupling , etc.. which form the basic building blocks of a DIY CNC. It was around in March 2012 that I finally decided to make one(along with quadcopter xD) and had the commitment. I researched a lot online for weeks to get myself comfortable with the mechanics of CNC Machine and related calculations. Had gone through a big number CNC Designs and finally made a rough blue-print of a CNC which I am gonna build. At the moment I’ve still not decided that which kind of Aluminum Extrusion will be used for making the frame.

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