ACU-RITE MILLPWR G2, Техническое руководство

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5.13 The Control Loop 333
5.13.5 Filter before Position Control Loop
Configuration
of filters Two filters are located before the position control loop to prevent the machine
from oscillating. In MP_typeFilter1/2, you assign a filter to the linear axes or
the rotary axes, and in MP_orderFilter1/2 you define the global filter order.
Then you define for each axis whether a filter is used and which filter is used
for optimizing the axis. In addition, the frequency of the filter is defined axis-
specifically.
The smoothing function of these filters causes contour errors. The velocity
profile is adjusted by the look-ahead function so that the contour error does
not exceed the given tolerance.
Take the machine setup into account when you configure filters. It is decisive
whether TCPM (Tool Center Point Management) executes compensating
movements for rotary axes.
HEIDENHAIN recommends that you configure the filters of standard
machines (TCPM is not used) as follows:
 Enter MP_typeFilter1=Off.
 Enter MP_typeFilter2=Position and define the filter order in
MP_orderFilter2.
 For rotary and linear axes, enter MP_filter2Shape=HSC and enter the cut-
off frequency of the machine in MP_filter2LimitFreq.
Settings in the configuration editor:
System
CfgFilter
typeFilter1
orderFilter1
typeFilter2
orderFilter2
Axis
ParameterSets
Key for parameter set
CfgPositionFilter
filter1Shape
filter1LimitFreq
filter2Shape
filter2LimitFreq
Note
Filters delay the processing time of NC blocks by the control, since multiple
NC blocks must be considered for the filter functions.