Kink Point - HEIDENHAIN TNC 415 Technical Manual

Kink point:

For machines with high rapid-traverse rates it is usually not possible to raise the K v factor enough to
give an optimal loop characteristic over the entire range of speeds (stop, machining feed rates, rapid
traverse). In such cases one can introduce a kink point, which gives the following advantages:
– for lower rates, a high K
– for higher rates (above the machining rates) a lower K
The position of the kink point is determined by machine parameter MP1830. In the higher range the
K v factor is multiplied by the factor from MP1820.
U [V]
9
MP1830
MP1810 (= k v )
The kink point must lie above the range of machining feeds!
Under these conditions, the lag can be calculated as follows:
[
· MP1830 [%] + 100 [%] – MP1830 [%]
Ve
s =
a
k
v
100 [%]
MP1820 Multiplication factor for the K v factor
Entry: 0.001 to 1.000
MP1820.0 X axis
MP1820.1 Y axis
MP1820.2 Z axis
MP1820.3 4th axis
MP1820.4 5th axis
MP1830 Kink point
Entry: 0.000 to 100.000 [%]
MP1830.0 Axis X
MP1830.1 Axis Y
MP1830.2 Axis Z
MP1830.3 4th axis
MP1830.4 5th axis
4-72 TNC 407/TNC 415/TNC 425
, i.e. a larger voltage step per µm of positional deviation,
v
MP1810 · MP1820
MP1820 · 100 [%]
3 Servo positioning of the NC-axes
.
v
sa
]
01.98