
B-63943EN-1/02 11.SPINDLE SPEED FUNCTION
- 1401 -
11.11.14 Timing Charts for Rigid Tapping Specification
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 and apply the
information it contains as necessary.
M
Specification method Gear selection
method
M-type
T-type
Gear
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.11.11.14(a) Fig.11.11.14(e) Fig.11.11.14(i)
M-type
Performed Fig.11.11.14(b) Fig.11.11.14(f) Fig.11.11.14(j)
Not performed Fig.11.11.14(c) Fig.11.11.14(g) Fig.11.11.14(k)
T-type
Performed Fig.11.11.14(d) Fig.11.11.14(h) Fig.11.11.14(l)
T
Specification method
Gear switching
M29 is specified before
G84/G88.
M29 and G84/G88 are
specified in the same block.
By parameter setting,
G84/G88 is specified as a G
code for rigid tapping.
Not performed Fig.11.11.14(m) Fig.11.11.14(o) Fig.11.11.14(q)
Performed Fig.11.11.14(n) Fig.11.11.14(p) Fig.11.11.14(r)
NOTE
For more information about the M/T type gear
selection method, see Section “SPINDLE SPEED
CONTROL.” Note the following:
Machining center series
when constant surface speed control is not being
used and bit 4 (GTT) of parameter No. 3706 is set to
0. → M-type
When constant surface speed control is being used,
or bit 4 (GTT) of parameter No. 3706 is set to 1.
→ T-type
Lathe system :
T-type only