HEIDENHAIN TNC 640 (34059x-05) - Manual (Page 496)

Programming: Turning Operations
14.3 Unbalance functions (Option #50)
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TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 1/2015
Measure Unbalance cycle
To ensure maximum safety and minimum strain on the machine
and workpiece during turning, you should check the unbalance
of the clamped workpiece and compensate it with a balancing
weight. The TNC provides the
MEASURE UNBALANCE cycle for this
purpose.
The
MEASURE UNBALANCE cycle determines the unbalance of
the workpiece and calculates the mass and position of a balancing
weight.
To determine unbalance:
Shift the soft-key row in the Manual Operation
mode
Select the
MANUAL CYCLES soft key
Select the
TURNING soft key
Select the
MEASURE UNBALANCE soft key
Enter the speed for unbalance detection
Press the NC Start button: The cycle starts
rotating the table at a low speed and gradually
increases the speed up to the defined value. The
TNC displays a window that shows the calculated
mass and radial position of the balancing weight.
If you wish to use a different radial position or mass for the
balancing weight, you can overwrite one value and have the other
value recalculated automatically.
Repeat the unbalance measurement after you have
clamped a balancing weight.
In some cases, you may need to place two or more
balancing weights at different positions in order to
compensate unbalance.