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Section 10 - Appendix - 71Microrouter CNC Machine User's Manual

A Part Program is a list of coded instructions which describes how

the designed part, or component, will be manufactured. The part

program is also called the CNC File.

These coded instructions are called data - a series of letters and

numbers. The part program includes all the geometrical and

technological data to perform the required machine functions and

movements to manufacture the part.

The part program can be further broken down into separate lines of

data, each line describing a particular set of machining operations.

These lines, which run in sequence, are called blocks.

A block of data contains words, sometimes called codes. Each word

refers to a specific cutting/movement command or machine function.

The programming language recognised by the CNC, the machine

controller, is an International Standards Organisation code, which

includes the G and M code groups.

Each program word is composed from a letter, called the address,

along with a number.

These terms are illustrated on the following pages.

10: What is a Part Program?

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