
B-63943EN-1/02 11.SPINDLE SPEED FUNCTION
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NOTE
The M type gear selection method cannot be
selected when one of the following functions is
used:
- Constant surface speed control
- Multi-spindle function
- Extended spindle name
- Spindle control between paths
T
The lathe system can use only T type.
- M type gear selection method
By specifying from S0 to S99999 in memory or MDI operation, the
CNC outputs a command corresponding to the spindle speed. There is
a two-speed (GR1O and GR2O) or three-speed range (GR1O, GR2O,
GR3O), set by parameter Nos. 3741-3743, and the gear selection
signal is output simultaneously. When the gear selection signal is
changed, the SF signal is output at the same time.
By setting bit 6 (SFA) of parameter No. 3705, SF can also be output
regardless of gear change.
The meaning of the gear signals is shown below:
Gear 2-stage Gear 3-state Remarks
GR1O Low Low
GR2O High Middle
GR3O High
Low :Low Gear
Middle :Middle Gear
High :High Gear
The speed commands output to the spindle motor are as follows:
- For the serial spindle, the speed commands are processed as
values 0 to 16383 between the CNC and spindle control unit.
- For the analog spindle, the speed commands are output to the
analog voltage signal SVC as analog voltages 0 to 10 V.
The following descriptions exemplify the analog spindle. However,
they can be applied to the serial spindle on the assumption that spindle
motor speed with analog voltage 10 V corresponds to the maximum
spindle motor speed.
(i) M type gear change method A (See Fig. 11.3 (a).)