HEIDENHAIN TNC 430 PA/M - Characteristic Curve Kink Point (for Control with Following Error)

December 2001 The Control Loop 6 – 129
Characteristic curve
kink point (for
control with
following error)
For machines with high rapid traverse, you can not increase the k
v
factor
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
v
factor in the low range
n Low k
v
factor in the upper range (beyond the machining velocity range)
7
77
7 Define the position of the characteristic kink with MP1830.x. In the upper
range, the k
v
factor is multiplied by the factor from MP1820.x.
7
77
7 Enter a multiplier in MP1820.
The characteristic curve kink point must lie above the tool feed rate!
Calculating the following error:
MP1820.0-8 Multiplier for the k
v
factor for axes 1 to 9
Input: 0.001 to 1.000 00
MP1830.0-8 Kink point for axes 1 to 9
Input: 0.000 to 100.000 [%]
MP1810 · MP1820
9
U [V]
sa
MP1810 (= k
v
)
MP1830
s
a
MP1830.x [%]
100 [%]
---------------------------------------------
100 [%] MP1830.x [%]–
MP1820.x 100 [%]⋅
------------------------------------------------------------------------------+
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v
e
k
v
-------
⋅=