
B-65270EN/05 4.SERVO FUNCTION DETAILS
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1721 (FS15i)
Phase compensation coefficient α
2036 (FS30i, 16i)
(Set this parameter for the sub-axis only.)
[Valid data range] 51 to 512 (0.1< α <1)
[Typical setting] 0 (512 internally)
This parameter has the same function as damping compensation of the
tandem control function. When 512 is specified, the advance amount
is 0 degree. (See Subsec. 4.18.2.)
2738 (FS15i)
Integral gain Ki
2325 (FS30i, 16i)
(Set this parameter for the main axis only.)
[Valid data range] 0 to 4000
This parameter compensates for a machine spring element. Set a large
value when the rigidity is high. Set a small value for a motor with a
greater torque constant.
2738 (FS15i)
Phase compensation coefficient 2T/t
2325 (FS30i, 16i)
(Set this parameter for the sub-axis only.)
[Valid data range] 0 to 32767
[Typical setting] 0 (40 internally)
This parameter is used with coefficient α to compensate the
compensation delay. When the resonance frequency is 100 Hz or more,
set α = 100 and 2T/t = 6.
2746 (FS15i)
Incomplete integral time constant
2333 (FS30i, 16i)
(Set this parameter for the main axis only.)
[Valid data range] 0 to 32767
[Typical setting] 0 (30877 internally)
As integral gain Ki increases, vibration in the low frequency area (10
Hz or less) may occur. In such a case, set the incomplete integral time
constant to decrease the time constant. Set a parameter value listed
below.
Table 4.16.1 Setting in the incomplete integral time constant parameter
(when HRV1, HRV2, HRV3 is used)
Time constant (sec) Parameter setting
0.1 30887
0.05 29307
0.02 25810