
B–63523EN–1/03
9. SPINDLE SPEED FUNCTION
1151
The timing chart for rigid tapping specification depends on the method
used to specify rigid tapping mode, the gear selection method (M–type or
T–type), and whether to perform gear switching.
From the table, find the appropriate timing chart (Fig. 9.11.7.1 (a) to Fig.
9.11.7.3 (d)) and apply the information it contains as necessary.
Specification method
selection
method
M–type
T–type
switching
M29 is specified before
G84 (G74).
M29 and G84 (G74) are
specified in the same
block.
By parameter setting,
G84 (G74) is specified as
a G code for rigid
tapping.
Not performed Fig. 9.11.7.1 (a) Fig. 9.11.7.2 (a) Fig. 9.11.7.3 (a)
Performed Fig. 9.11.7.1 (b) Fig. 9.11.7.2 (b) Fig. 9.11.7.3 (b)
Not performed Fig. 9.11.7.1 (c) Fig. 9.11.7.2 (c) Fig. 9.11.7.3 (c)
Performed Fig. 9.11.7.1 (d) Fig. 9.11.7.2 (d) Fig. 9.11.7.3 (d)
NOTE
For more information about the M/T type gear selection
method, see Section 9.3 SPINDLE CONTROL. Note the
following:
T series: T–type
only
M series: M–type when constant surface speed control
is not being used and bit 4 (GTT) of
parameter No. 3706 is set to 0
T–type
when constant surface speed control
is being used, or bit 4 (GTT) of
parameter No. 3706 is set to 1
9.11.7
Timing Charts for Rigid
Tapping Specification