HEIDENHAIN TNC 426 PB/M - Page 820

6 – 490 HEIDENHAIN Technical Manual TNC 426, TNC 430
Control with following error (servo lag):
The adjusted maximum jerk works during operation with following error.
MP1090 is not changed.
Procedure:
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77
7 Check the temporary input values for the machines parameters
7
77
7 Specify the k
v
factor for the machining feed rate:
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77
7 Enter the following test program:
LBL1
L X <maximum traverse> R0 F <machining feed rate>
L X0 R0 F <maximum machining feed rate>
CALL LBL1 REP 100/100
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77
7 Display the actual feed rate (actl. speed) with the internal oscilloscope.
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77
7 Start the test program with feed rate override = 100%.
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77
7 Increase the value in MP1810.x up to the oscillation limit.
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77
7 Calculate MP1810.x:
MP1810.x = <determined value> · 0.6
For axes that are interpolated with each other, the k
v
factors must be equal.
The axis with the smallest k
v
factor defines the input value for all axes.
You can save a number of different k
v
factors in the TNC (MP1815.x) and
activate them with M functions (See "The Control Loop” on page 6 – 109).
Procedure for defining a characteristic curve kink point:
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77
7 Specify the k
v
factor for rapid traverse (characteristic curve kink point):
MP1820.x = 1
MP1810 at the oscillation limit
MP1830.x
max. machining feed rate 100 %⋅
Rapid traverse
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