
3.USEFUL FUNCTIONS FOR MACHINING PROCESSES SUPPLEMENT B-63344EN/02
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3.7 REVERSE TAPPING
Reverse tapping can be performed by parameter setting. When this
function is enabled, the M code indicating forward or reverse rotation
is issued before tapping.
NOTE
The above function is enabled by setting bits 5
(MTM) and 4 (TTM) of parameter No. 9846. For
details of the parameter setting, see Appendix A,
"PARAMETERS." When bit 6 (G32) of parameter
No. 9779 is set to 1, this function is disabled for
tapping by turning.
When this function is enabled, the motion of each machining pattern
is as follows.
(1) Forward tapping by turning :
When the parameter No.9779#6(G32) is set to 0.
:
(M8/M9);
G50 S_ ;
:
M(Forward spindle rotation tapping pre-command P9292); . . . (A)*
G97G99G40S_ T_ M(Forward spindle rotation command P9295);
G80;
(Movement to the cutting start point)
G99G84Z_ R0.F_ P_ ;
G80;
:
* Block (A) is output when a value is set for parameter No. 9292.
(2) Reverse tapping by turning :
When the parameter No.9779#6(G32) is set to 0.
:
(M8/M9);
G50 S_ ;
:
M(Reverse spindle rotation tapping pre-command P9293); . . . (A)*
G97G99G40S_ T_ M(Forward spindle rotation command P9295);
G80;
(Movement to the cutting start point)
G99G84Z_ R0.F_ P_ ;
G80;
: