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CNC Programming Chapter 5
Wahnish 12/5/2012
17
Engineering
10th Grade
12/04/2012

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Term
Simple instructions that the programmer will write to make the machine behave in a certain way.
Definition
G&M codes
Term
Made up of distinct units of instruction called Blocks.
Definition
NC Part Program
Term
____ will read and execute the blocks sequentially.
Definition
MCU
Term
____ will read several blocks at once but will only execute one block at a time.
Definition
MCU
Term
The last few lines of the program control a few ordinary machine functions and administrative duties such as..
Definition
A) Shutting off the spindle
B) Resetting the program
C) Telling the MCU where the program ends
Term
_____ in an NC program is a line of code that is constructed from words.
Definition
A Block
Term
____ are used just once and then discarded.
Definition
Non-modal codes
Term
_____ remain in active memory until superseded.
Definition
Modal codes
Term
_____ are grouped into different categories of related functions.
Definition
Programming codes
Term
Regardless of a code's function, mot controls only allow one _____ per block.
Definition
M-code
Term
_____ processes the program one block at a time and reads the entire block before processing it.
Definition
The MCU
Term
What is not important to the MCU?
Definition
That the codes are in any particular order.
Term
_____ are usually placed at the end of a block when the block also includes a ______?
Definition
M-codes, G-codes
Term
Why and where are M-codes usually located?
Definition
M codes because they imply some action.
Term
Spaces must not occur between a _____ and its ____or withing a _____ or _____ code.
Definition
letter, number, G, M
Term
The _____________ specifies the order of each manufacturing process, the cutting tools, and speeds and feeds.
Definition
Operations Sheet
Term
when utilizing the ________, the backside is located on 3 points, the bottom on two points and the side on 1 point.
Definition
3-2-1 Locating chart
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