
B-65280EN/05 FANUC AC SPINDLE MOTOR βi series 2.EXPLANATION OF OPERATION MODES
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2.4.7 Details of Related Parameters
For this subsection, see Subsection 2.4.7, "Details of Related
Parameters", in Part I.
The βi series spindle motor, however, enables Cs contouring control
in a system where an α position coder is used as the position sensor.
In such a case, control improvements such as smooth low-speed feed
can be made by using the position coder feedback interpolation
function set with the parameter below.
0i
#7 #6 #5 #4 #3 #2 #1 #0
4398
PCCSCM
PCCSCM Sets the position coder feedback interpolation function.
0 : Disables the position coder feedback interpolation function.
1 : Enables the position coder feedback interpolation function.
When an α position coder is used for spindle position feedback to
exercise Cs contouring control, this function improves control
performance with position coder feedback pulse interpolation using
high-resolution motor side feedback. To use this function, set this
parameter to 1.
This function is valid only when the spindle sensor is an α position
coder. When the gear ratio between the spindle and motor is not 1:1,
be sure to set an arbitrary gear ratio (No. 4171 through No. 4174)
between the spindle and motor.
NOTE
1 This parameter is valid with 9D50 Series H (08)
edition or later.
2 When Cs contouring control is exercised in a system
where an α position coder is used as the position
sensor, the position feedback resolution is 0.088
deg. In this case, the position error may not
converge to 0, depending on the specified position.
So, a value greater than 88 pulses (0.088 deg) must
be set as the effective area (No. 1826).