
B–63523EN–1/03
9. SPINDLE SPEED FUNCTION
1066
Any axis in the control axis group can be used as the C axis (parameter
no. 1020). Specify *1 as its servo axis number (parameter no. 1023).
Only one set of this setting can be used for each control path. The spindle
subjected to spindle positioning is the first spindle.
Orientation is required in advance if spindle positioning is first performed
after the spindle motor is used as a normal spindle, or when spindle
positioning is interrupted. The orientation stops the spindle in a constant
position. The orientation position can be sifted in the range of "180deg
for analog spindle and in the range from 0 to 360_ for serial spindle.
To specify orientation, use the M code specified in parameter No. 4960.
The orientation direction is specified by using parameters ZMIx No. 1006
#5 for analog or RETURN No. 4000#5 for serial spindles.
The spindle moves at rapid traverse (set by parameter No. 1420) until it
reaches the orientation enable speed (shown below). After the spindle
crosses that speed point, it performs orientation at the speed set by
parameter No. 1425. When a serial spindle is used, orientation speed
depends on the spindle.
⋅ Orientation enable speed
RPD>9 (loop gain) KPPM
Loop gain: Parameter No. 4970 (unit: 1/sec)
Set rapid traverse speed at above value.
(Example)
When the loop gain parameter No. 4970 is set to 20 [1/sec], the orientation
speed is:
RPD>9 20 1000 (360/4096)=15820 [deg /min]
The serial spindle stops at the orientation position as soon as the command
is issued. The lower limit to the rapid traverse speed value does not need
to be specified for the serial spindle to reach the orientation enable speed.
The analog spindle stops after the spindle speed is changed from rapid
traverse to the FL speed. The rapid traverse speed lower limit must be
specified for the analog spindle, or obtaining the orientation enable speed
need not be specified for the serial spindle. However, it must be specified
for the analog spindle.
The orientation position is regarded as a program origin. It is possible to
modify the program origin using the coordinates system or automatic
coordinates system settings (parameter ZPR No. 1201#0)
Selecting a spindle
positioning axis
Switching to spindle
positioning mode
(Spindle orientation)
D Orientation speed
D Program origin