HEIDENHAIN iTNC 530 (340 49x-03) ISO programming - Manual (Page 582)

582 12 Test Run and Program Run
12.8 Global Pr
ogr
a
m Set
tings (Sof
tw
ar
e Option)
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 Start val column. The
start value remains saved until you delete it, even after a power
interruption. You can also edit the start value. If required, the TNC
decreases the value that you entered to the respective Max. val.
If a start 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 570).
A maximum traverse distance, defined in the NC
programmed with M118, is overwritten 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 start 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 570).
If you try to enter a start value greater than the max.
value,
the TNC shows an error message. Never enter a
start value greater that the Max. value.