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Differential factor
Low-pass filter
850
The differential factor can reduce low-frequency oscillations. However, it
increases oscillations in the high frequency range.
In MP2520.x, enter a differential factor.
Note
Ensure that the system is stable enough!
The differential factor is not recommended on machines with motors that
have belt couplings. The influence of aging and temperature is too great.
Estimating the differential factor:
MP2520.x
MP2520.x: Differential factor of the speed controller [As
MP2500.x: Proportional factor of the speed controller
T: Period of the lowest interference frequency [s]
MP2520.x
Differential factor of the speed controller
Input:
0 to 1.0000 [As
With the low-pass filter you can damp high-frequency oscillations
(> approx. 450 Hz):
Use the oscilloscope to find the fundamental frequency of the iTNC.
Activate the 1st or 2nd order low-pass filter (see table).
Fundamental frequency of the
interference oscillation
450 Hz to 550 Hz (approx.)
> 550 Hz (approx.)
If you cannot achieve satisfactory results with the low-pass filter, try the PT
element.
MP2560.x
Low-pass filter of the speed controller
Input:
0: No low-pass filter
1: 1st-order low-pass filter
2: 2nd-order low-pass filter
T MP2500.x
⋅
------------------------- -
≈
8
2
]
Filter order (MP2560.x)
First order (MP2560.x = 1)
Second order (MP2560.x = 2)
HEIDENHAIN Technical Manual iTNC 530 HSCI
2
]
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