HEIDENHAIN iTNC 530 (340 49x-04) - Manual (Page 694)

694 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.
Virtual axis VT
You can also carry out handwheel superimpositioning in the currently
active tool axis direction. You can use the line VT (Virtual Tool axis) to
activate this function.
You can select the VT axis via the HR 420 handwheel in order to
traverse with superimpositioning in the virtual axis direction (see
“Selecting the axis to be moved” on page 75).
The TNC also shows the path traversed in the virtual axis in the
additional status display (POS tab) in the separate VT position display.
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 682).
A maximum traverse distance, defined in the NC program
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
682).
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.
Do not enter too large a value for max. value. The TNC
reduces the traverse range in positive and negative
direction by the value you enter.
The TNC deactivates the value traversed in the virtual axis
direction as soon as you call a new tool.
You can only move with handwheel superimpositioning in
the virtual axis direction if DCM is inactive.