Siemens SINUMERIK 828D Function Manual page 375

Fine Interpolation
Using the fine interpolator (FIPO), the contour precision can be further increased by reducing the staircase effect
in the speed setpoint. You can set 3 different types of fine interpolation:
MD33000 $MA_FIPO_TYPE = <FIPO mode>
<FIPO mode> Meaning
1 Differential fine interpolation with mean value generation (smoothing) over an IPO
cycle
2 Cubic fine interpolation
3 Cubic fine interpolation optimized for use with the pre-control for the highest contour
precision
Servo gain factor (K )
v
In order that few contour deviations occur in the continuous path mode, a high servo gain factor (K
necessary:
MD32200 $MA_POSCTRL_GAIN[n]
However, if the servo gain factor (K
the machine will result.
The maximum permissible servo gain factor (K
• Design and dynamics of the drive
(rise time, acceleration and braking capacity)
• Machine quality
(elasticity, oscillation damping)
• Position control cycle or speed control cycle for active DSC
The servo gain factor (K
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
G2: Velocities, setpoint / actual value systems, closed-loop control
) is too high, instability, overshoot and possibly impermissibly high loads on
v
) depends on the following:
v
) is defined as follows:
v
7.5 Closed-loop control
) is
v
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