HEIDENHAIN TNC 640 - Page 533

Special Functions | Global Program Settings (option 44)
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
533
By entering values in the Max. val. column, you define which
axes may be moved using the handwheel and the maximum path
by which they may be moved. Since the input value applies to
both directions (both positive and negative), the maximum path is
double the input value.
In the Actl.val. column, the control displays the path traversed
using the handwheel for each axis.
The Actl.val. column can also be edited manually. However,
if you enter a value that exceeds the current Max. val., it will
be impossible to activate the value. The wrong value will be
highlighted in red. Moreover, the control displays a warning
message and prevents you from closing the form.
If the Actl.val. column contains a value when you activate the
function, the control will move to the new position via the menu for
returning.
Further information: "Returning to the contour", page 839
Using the CONFIRM VALUE soft key, you can transfer
the axis-specific values from the Actl.val. column to
the shift values defined in the Global Program Settings
function. This transfer is only possible for the principal
axes. In addition, the coordinate systems must match.
Further information: "Shift (W-CS)", page 527 and
page 529
When the values are applied, the control resets the
input fields of the Actl.val. column.
If you apply the values more than once, the control will
sum up the shift values.
NOTICE
Danger of collision!
If both methods for setting Handwheel superimp.:, i.e. with
M118 or by using the Global Program Settings function, are
effective at the same time, the definitions influence each other,
depending on their sequence of activation. There is risk of
collision during the execution of Handwheel superimp.: and
during the subsequent machining operations!
If possible, only use one method for Handwheel superimp.:
Preferably use the Handwheel superimp.: option in the
Global Program Settings function
Test the behavior at the machine
HEIDENHAIN does not recommend to use both methods
of setting Handwheel superimp.: at the same time. If it is
impossible to remove M118 from the NC program, you should
activate Handwheel superimp.: in the Global Program Settings
function prior to selecting the program. This ensures that the
control uses the Global Program Settings function rather than
M118.