
FANUC AC SPINDLE MOTOR a series
2. FUNCTION EXPLANATION
B–65160E/02
54
An approximate value for Nb/Tb can be calculated as follows:
Nb
Tb
+
Tm
Jm ) Jl
60
2p
where,
Tm : 30–min rated torque [Nm]
Jm + Jl : Rotor inertia + load inertia [kg m
2
]
16i/16015
15i
Spindle orientation control mode switching pulse width
6290 3470 3326 4326
6470 3690
1st–
2nd–
Data unit :
(number of control mode switching pulses)
64
Data range : 0 to 32767
Standard setting : 0
This parameter sets the pulse width used for switching the orientation
control mode when shortest–time spindle orientation is performed.
When 0 is set for this parameter, positioning by position gain is set when
the positioning deviation is 205 pulses (5% of 4096 pulses) or less.
To perform orientation control mode switching when the positioning
deviation is 256 pulses, for example, set the following value:
Setting + 256 64 + 1024
16i/16015
15i
Command multiplier for spindle orientation using a position coder
6292 3472 3328 4328
6472 3692
1st–
2nd–
Data unit :
Data range : 0 to 32767
Standard setting : 0
This parameter specifies command multiplier for the spindle orientation
function for which incremental commands are specified externally.
When 0 is specified for this parameter, multiplication by one is set
automatically.
When the spindle speed is to be controlled, set 4096 in this parameter.
16i/16015
15i
Motor activation delay for spindle orientation
6294 3474 3330 4330
6474 3694
1st–
2nd–
Data unit : 1 msec
Data range : 0 to 32767
Standard setting : 0
This parameter is valid only when the speed is within the range between
the zero speed detection level (SST = 0) and the orientation speed in
shortest–time orientation.
When 0 is specified for this parameter, 50 msec is set automatically.