
5.FUNCTION DESCRIPTIONS FANUC AC SPINDLE MOTOR αi series B-65280EN/05
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15
i 16i 30i
3171 4171 4171
Denominator of conversion coefficient (HIGH) CTH1A=0
3172 4172 4172
Numerator of conversion coefficient (HIGH) CTH1A=0
3173 4173 4173
Denominator of conversion coefficient (LOW) CTH1A=1
3174 4174 4174
Numerator of conversion coefficient (LOW) CTH1A=1
Unit of data :
Valid data range : 0 to 32767
Standard setting value : 0
These parameters are used to obtain the feedback amount for one
rotation of the spindle from the position feedback signal in the
semi-closed loop (the position feedback signal from the motor sensor)
when the spindle rotates one turn.
When the spindle rotates Q turns while the motor shaft rotates P turns
(P and Q are mutually prime integers), the parameters are set as
follows:
No. 4171 (No. 4173 if CTH1A = 1) = P
No. 4172 (No. 4174 if CTH1A = 1) = Q
If these parameters are set to "0", "1" is assumed to be set in the
parameters.
15
i 16i 30i
3215 4215 4215
Primary delay time constant in dual position feedback
[in Cs contouring control]
Unit of data : 1msec
Valid data range : 0 to 32767
Standard setting value : 0
This parameter sets a primary delay time constant in dual position
feedback when Cs contouring control is exercised.
If hunting occurs during acceleration/deceleration, set a larger value.
If this parameter is set to 0, the same setting as for a closed loop (=
dual position feedback disabled) results.
Setting "32767" provides control equivalent to the semi-closed loop.
15
i 16i 30i
3224 4224 4224
Maximum amplitude in dual position feedback [in Cs contouring control]
Unit of data : 64 pulses (=0.064deg)
Valid data range : 0 to 32767
Standard setting value : 0
This parameter sets a maximum amplitude in dual position feedback
when Cs contouring control is exercised.
If an error between the position in the semi-closed loop and the
position in the closed loop exceeds the setting, correction clamping
occurs.
If "0" is set, correction clamping does not occur.