
B–63833EN–1/02
9. SPINDLE SPEED FUNCTION
543
M series: SF output depends on the gear selection method, as described
below.
[1]M–type gear selection method
SF output depends on bit 6 (SFA) of parameter No. 3705.
[2]T–type gear selection method
SF output depends on the setting of bit 5 (NSF) of parameter No. 3705.
T series: The following parameter needs to be set to output S codes and
SF: Bit 4 (EVS) of parameter No. 3705 = 1
In rigid tapping, when SF is to be used by the PMC to read an S code
output signal for gear switching or output switching, set the above
parameters as required.
NOTE
1 The timing charts, given later, give examples of gear
switching by setting the parameters as follows:
M series: SFA = 0, NSF = 0
T series: EVS = 1
2 When the constant surface speed control function is being
used, an S code (specifying a surface speed) used for
constant surface control (G96) is output. Such an S code
can be distinguished from an S code used for specifying a
rotation speed. One method is to use, for example, the
constant surface speed control in–progress signal
<F002#2> for the processing performed on the PMC side.
Another method is to mask the S code and SF signal, output
by setting bit 0 (ESF) of parameter No. 3705.
[Classification] Output signal
[Operation] When M–type gear selection is being used, these signals are used in a
PMC sequence for rigid tapping.
The signals post, to the PMC, information about a spindle gear to be used,
according to the value of S**** specified at the execution of G84 (G74).
When gear switching becomes necessary, the states of the signals change
together with the SF signal.
The PMC should perform gear switching according to the information
posted by the gear selection signals.
9.10.6.3
Signals related to gear
switching
Gear selection signals
(output)
GR3O, GR2O, GR1O
<F034#2, #1, #0>
(M series)