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Determining the
acceleration
Check the counting
direction
6 – 482
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Clamp an object of maximum permissible weight on the machine table.
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Enter the rapid traverse as step height.
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During the step response, record the step response of the nominal velocity
value V (NOM RPM), the actual speed value V (ACT RPM), and the nominal
current value (I NOMINAL). It is permissible to limit the nominal current
value I NOMINAL during acceleration.
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From the step response of the speed controller you determine the
maximum possible acceleration.
F
max
------------------------------ -
a
=
⋅
t
66 000
an
2
a: Acceleration [m/s
]
F
: Maximum machining feed rate (MP1010.x) [mm/min]
max
t
: Rise time [s]
an
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Enter the maximum possible acceleration in MP1060.x.
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On the oscilloscope, set TRIGGER to FREE RUN.
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To start recording:
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Change to MANUAL operating mode.
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Press the axis direction buttons.
7 7 7 7
Check the counting direction on the display and if necessary, correct it with
MP210.x.
HEIDENHAIN Technical Manual TNC 426, TNC 430
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