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Characteristic curve
kink point (for
control with
following error)
December 2001
For machines with high rapid traverse, you can not increase the k
enough for an optimum control response to result over the entire velocity
range (from standstill to rapid traverse).
In this case you can define a characteristic curve kink point, which has the
following advantages:
n
High k
factor in the low range
v
n
Low k
factor in the upper range (beyond the machining velocity range)
v
7 7 7 7
Define the position of the characteristic kink with MP1830.x. In the upper
range, the k
factor is multiplied by the factor from MP1820.x.
v
7 7 7 7
Enter a multiplier in MP1820.
U [V]
9
MP1830
The characteristic curve kink point must lie above the tool feed rate!
Calculating the following error:
æ
MP1830.x [%]
s a
=
---------------------------------------------
è
100 [%]
MP1820.0-8 Multiplier for the k
Input:
0.001 to 1.000 00
MP1830.0-8 Kink point for axes 1 to 9
Input:
0.000 to 100.000 [%]
The Control Loop
MP1810 · MP1820
MP1810 (= k v )
100 [%] MP1830.x [%]
–
+
----------------------------------------------------------------------------- -
⋅
MP1820.x 100 [%]
factor for axes 1 to 9
v
factor
v
sa
v e
ö
⋅
-------
ø
k
v
6 – 129
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