
B–64113EN–1/01
9. SPINDLE SPEED FUNCTION
629
Reference information: The table below indicates the relationship
between the output signals and gear selection.
GR3O GR2O GR1O
1st (low) speed gear × × f
2nd (medium) speed gear × f ×
3rd (high) speed gear f × ×
[Classification] Input signal
[Operation] When T–type gear selection is being used, these signals are used in a PMC
sequence for rigid tapping.
The signals post, to the CNC, information about a spindle gear to be used.
Reference information: The table below shows the relationship
between the output signals and spindle gear
selection.
GR2 GR1
1st (low) speed gear × ×
2nd (medium)
speed gear
× f
3rd (high) speed
gear
f ×
4th (high) speed
gear
f f
[Classification] Input signal
[Operation] When rigid tapping with the second spindle is being performed, the signal
is used in the PMC sequence program.
The signal notifies the CNC of spindle gear information of the selected
spindle.
The input signal is related to gear selection as described below.
GR21 1 : The second stage is currently selected as the second spindle gear.
0 : The first stage is currently selected as the second spindle gear.
GR21
1st speed gear ×
2nd speed gear f
When a serial spindle is used, the serial spindle clutch/gear selection
signals (G070#3, #2 for the first spindle and G074#3, #2 for the second
spindle) must be set in addition to the setting of the gear selection signal
described above.
Gear selection signals
(input)
GR2, GR1<G028#2, #1>
← In M series rigid tapping, the specifi-
cation of the 4th (high) speed gear
is invalid. If specified, the system
assumes that the 3rd (high) speed
gear has been specified.
Gear selection signal
(input)
GR21<G029#0>