HEIDENHAIN iTNC 530 User Manual page 379

Virtual axis VT
To be able to traverse with the handwheel in the virtual
axis direction VT you have to enable M128 or FUNCTION
TCPM.
You can only move with handwheel superimpositioning in
the virtual axis direction if DCM is inactive.
You can also carry out handwheel superimpositioning in the currently
active tool axis direction. You can use the Virtual Tool axis line (VT).
Values traversed with the handwheel in a virtual axis remain active in
the default setting even after a tool change. Using the Reset VT value
function you can specify that the TNC resets to values traversed in VT
upon tool change:
U In the global program settings form, move the cursor to Reset VT
value and use the SPACE key to activate the function.
You can select the VT axis via a HR 5xx handwheel in order to traverse
with superimpositioning in the virtual axis direction (see "Selecting the
axis to be moved" on page 471). Working with the virtual VT axis is
particularly convenient with the HR 550 FS wireless handwheel (see
"Traversing with electronic handwheels" on page 466).
The TNC also shows the path traversed in the virtual axis in the
additional status display (POS tab) in the separate VT position display.
Your machine tool builder can provide functions with
which the procedure can be influenced by the PLC in the
virtual axis direction.
HEIDENHAIN iTNC 530 379