
B-63344EN/02 SUPPLEMENT 3.USEFUL FUNCTIONS FOR MACHINING PROCESSES
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NOTE
1 When bit 4 (TTM) of parameter No. 9846 is set to 0
or when the bit is set to 0 and parameter No. 9293
is not set, reverse rotation may be specified as the
direction of rotation for tapping (in process data). In
this case, P/S alarm, "3008 A WRONG TOOL
SELECTED," is issued.
2 In reverse tapping, the reverse spindle rotation
command is also issued at the bottom of the hole in
the same way as in forward tapping. To prevent this
command from being issued, the M code for the
reverse spindle rotation tapping pre-command is
output before a tapping command (G84 or G88) is
issued to issue the reverse rotation command at
the bottom of the hole. For this reason, set a signal
to reverse the spindle rotation commands following
this M code in the PMC ladder to make the system
reverse the spindle rotation commands according
to the signal. Make the PMC ladder cancel the
signal at the time such as at the falling edge of the
TAP signal (bit 5 (TAP) of F0001). Use the M code
for the forward spindle rotation tapping pre-
command as required.
(3) Forward rigid tapping by turning :
When the parameter No.9779#6(G32) is set to 0.
:
(M8/M9);
G50 S_ ;
G99G40T_ ;
G80;
(Movement to the cutting start point)
M(Spindle stop command P9294); . . .. . .. . . (B1)
or . . . (B)*
M(Forward spindle rotation tapping pre-commandP9292);
. . . (B2)
S_ M(Rigid tapping mode command P5210);
G99G84Z_ R0.F_ P_ ;
G80;
:
*(For block (B),
• Block (B1) is output when bit 4 (TTM) of parameter No.
9846 is set to 0.
• Block (B2) is output when bit 4 (TTM) of parameter No.
9846 is set to 1 and a value is set for parameter No. 9292.
When no value is set for parameter No. 9292, no command
is output.