Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Instrukcja Użytkownika Pobierz pdf (Strona 285)

100

101

Introduction to Programming

Chapter 10

10-7

words ---- A word consists of an address followed by a numeric value.

Examples of words are: G01, X10.5, F.1., M2. Each word requires a

specifi c format for its numeric part. These formats are given on page

10-21.

codes ---- There are industry standards for many of the G and M words

used here. For that reason, they are often referred to as G or M “codes”.

parameters ---- The control has a number of fixed cycles that are

initiated by a specifi c G word. Other words appearing in those G code

blocks are referred to as “parameters” because their values are relevant

only to that G code. For example, a Z word generally refers to a Z axis

move, but when it appears in a block with a G81 reciprocation cycle, its

value refers to the coordinate of the primary reversal point. In that case,

it is a “parameter” of the G81 reciprocation cycle.

A block is a set of words and characters that define the operations of the

control. For example:

/ N3 G00 X10. Z10. M3 ;

end ofblock character

miscellaneousfunction word

(spindleon forward)

axismovementwords

preparatoryfunctionword

(rapidpositioning mode)

sequencenumber word

optionalblockdelete character

The control sequentially executes blocks i n a part program to conduct the

required grinding operation.

Important: To make jumps, loops, or cal culations within an executing

program or subprogram, use the paramacro features as described in chapter

20.

A part program has a:

beginning ---- setting up the control and the grinder to perform the

operations wanted

middle ---- performing the grinding operations

end ---- returning the grinding wheel to a stopping

position and preparing

the control for the next part program

1 2 ... 280 281 282 283 284 285 286 287 288 289 290 ... 819 820

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