World War
Posted in Uncategorized on 04/27/2009 10:39 am by admin
World War
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 VINTAGE WAR TRADING CARD LOT World War II 1942 No 30 68 9 CARDS X21 QQ  US $9.50
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 WW 2 Relic German item US $15.00
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 US World War 2 Canteen Cup Cover US $75.00
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 France Postcards from World War I 1914 1916 US $11.95
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CNC (Computer Numerical Controlled) machines for precision machining have not always been as sophisticated as they are today. The current design of CNC machines was originally developed from the work of John. T Parsons in the late 1940s. After World War II John Parsons was involved in creating helicopter paddles using the process of precision machining. Parsons discovered that by using a computer he was able to make more accurate guide lines for the complex shapes of the paddles than if he used the normal manual calculations and methods. From here the Air Force contracted him to develop an actual machine to cut the shapes of the paddles automatically. Parsons built a machine based on his earlier computer model to automatically cut the shapes based on the complicated calculations the computer could process. Although the machine worked and was the first of its kind, it was very large and very expensive to produce, but he fulfilled his duty and the machine was able to cut the shapes with high accuracy and detail.
Modern Precision Machining
From here other industries picked up on the idea of CNC machines for precision which resulted in the price being reduced and the improvement of the design. It is hard to trace the precise development of the machine from this point forward due to the many people, businesses, military, and industries developing the CNC machine for their own precision machining purposes.
The CNC machine today works by taking the complex calculations and information from the computer memory in the form of commands which then directs the machine to cut the material accurately. The commands to the program are complicated and in computer language such as 'G99' which instructs the controller to read an auxiliary input from some process inside the machine. The work of CNC machines today in precision machining is heavily focused on the programming. It is currently being developed for the machine and program to understand more conversational language oppose to complicated coded demands.
If you are looking for a precision machining company take a look at ITI-Manchester's website.
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