Handwheel Superimposition - HEIDENHAIN ITNC 530 - 6-2010 DIN-ISO PROGRAMMING User Manual

Handwheel superimposition

The handwheel superimposition function enables you to use the
handwheel to move the axes while the TNC is running a program.
In the Max. val. column you define the maximum distance by which
you can move the axis by handwheel. As soon as you interrupt the
program run (control-in-operation signal is off), the TNC shows the
distances actually moved in each axis in the actual value column. The
actual value remains saved until you delete it, even after a power
interruption. You can also edit the actual value. If required, the TNC
decreases the value that you entered to the respective Max. val.
If a actual value is shown during activation, then when
the window closes, the TNC calls the "Return to contour"
function to move by the defined value (see "Returning to
the contour" on page 532).
The TNC overwrites a maximum traverse distance, already
defined in the NC program with M118 by the value entered
in the form. In turn, the TNC enters distances that have
already been traversed with the handwheel using M118 in
the actual value column of the form so that there is no
jump in the display during activation. If the distance
already traversed with M118 is greater than the maximum
permissible value in the form, then when the window
closes the TNC calls the "return to contour" function in
order to move by the difference value (see "Returning to
the contour" on page 532).
If you try to enter a actual value greater than the max.
value, the TNC shows an error message. Never enter an
actual value greater that the Max. value.
Do not enter too large a value for max. value. The TNC
reduces the useable traverse range in positive and
negative direction by the value you enter.
356 Programming: Special Functions