ke ad van tage of it When a macro is

Sep 04
2017

ke ad van tage of it When a macro is


called, any cur rent modal com mand should al ways be reg is tered at the be gin ning of the macro, if


that is not the case, then def i nitely be fore any changes are made within the macro


Copyright 2005, Industrial Press Inc, New York, NY –


FANUC CNC Custom Macros


168


busbar Machine


Chapter 12


Restoring Modal Data


Since the orig i nal G-code(-s) have been stored for the sin gle rea son of re stor ing them later, they


have to restored be fore the macro ends, typ i cally at the end, just angle machine be fore the M99 func tion Us ing


two sys tem vari ables introduced in the pre vi ous ex am ple, here is a sche matic lay out of a macro


pro gram structure, show ing both the stor age and the res to ra tion of two modal val ues:


O0018 (MACRO MODAL VALUES)


#31 = #4201


Store the current motion command


#32 = #4203


Store the current dimensioning mode


G90 G00 G54 X1500 Y750


< macro processing 锟?>


G#31 G#32


Restore both previously saved modes


M99


%


In the automatic punching machine ex am ple segment, the vari ables #31 and #32 store the cur rent val ues of the mo tion and


dimensioning modes, at the very be gin ning of the macro The macro then pro ceeds with its own


def i ni tions, G-code changes, and so on, and be fore the macro end (be fore M99), the orig i nal val –


ues, the pre vi ously stored val ues, are re trieved to be come modal af ter the macro ex its Since both


of the pre vi ously stored val ues rep re sent modal com mands, the pro gram ming re turns from the


macro to the same en vi ron ment that ex isted be fore the macro was called Log i cal method of num –


ber ing sys tem vari ables will be also ap plied to the other modal codes


Other Modal Functions


In punching machine ad di tion to the modal G-codes, there are ad di tional eleven modal codes used in typ i cal macro


pro gram ming Just like the G-codes, in a macro cal cu la tion (or a for mula), these pro gram codes


can not be pro grammed to the left side of the equal sign, which means they can not be as signed


value through the pro gram T

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