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From time to time various interesting videos come to hand and may be used or shown at the club.

We will provide you with the URLs to these videos so that you can see them again

Human pile driving in Thailand
https://www.youtube.com/watch?v=FB2uHnztAD
U

Liebherr Climbing excavator
https://www.youtube.com/watch?v=VBMUvAUPTGM

What is CNC?

CNC means Computer Numerical Control. This means a computer converts the design produced by Computer Aided Design software (CAD), into numbers. The numbers can be considered to be the coordinates of a graph and they control the movement of the cutter. In this way the computer controls the cutting and shaping of the selected material.

Some members have show interest as to how these CNC machines work and I am confident that these videos will help in understanding the concepts - once a design has been produced on a computer, special software converts the design into coordinates which can then control the various directions (axis) that the cutting head travels. A simple machine travels only on an 'x' or 'y' axis and is therefore used to cut designs out of flat pieces of material - complexity can be added by increasing the number of axis being controlled so that very complex multi dimensional (3d +) objects can result. The most common types of machine used by hobby operators use either a router blade or a Laser cutter, however there are other types that use high pressure water etc. This first video shows the difference between a laser and router machine then shows the latest addition to the technology - The 3D printer.

https://www.youtube.com/watch?v=FXTxCuYcR4Q

 

Given that there are a number of different machine concepts that are controlled in this way - this video shows a 5 axis 'router' type machine:    https://www.youtube.com/watch?v=yaehhlu1Y0M

And finally, it is not just cutting that uses CNC but the engraving industry has taken to the use of 'Lasers' for high speed, high resolution engraving of all sorts of materials, including wood, plastics and in this case metal.

https://www.youtube.com/watch?v=hAMpp1QFTeI

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