HEIDENHAIN TNC 640 (34059x-01) ISO programming - Manual (Page 366)

366 Manual Operation and Setup
13.1 S
w
itc
h
-On, S
w
itc
h
-Of
f
Crossing the reference point in a tilted working plane
The TNC automatically activates the tilted working plane if this
function was enabled when the control was switched off. Then the
TNC moves the axes in the tilted coordinate system when an axis-
direction key is pressed. Position the tool in such a way that a collision
is excluded during the subsequent crossing of the reference points. To
cross the reference points you have to deactivate the "Tilt Working
Plane" function, see "Activating manual tilting", page 399.
If one of the two functions that were active before is active now, the
NC START button has no function. The TNC outputs a corresponding
error message.
Switch-off
To prevent data from being lost at switch-off, you need to shut down
the operating system of the TNC as follows:
U Select the Manual Operation mode
U Select the function for shutting down, confirm again
with the YES soft key
U When the TNC displays the message NOW IT IS SAFE
TO TURN POWER OFF in a pop-up window, you may cut
off the power supply to the TNC
Danger of collision!
Make sure that the angle values entered in the menu for
tilting the working plane match the actual angles of the
tilted axis.
Deactivate the "Tilt Working Plane" function before you
cross the reference points. Take care that there is no
collision. Retract the tool from the current position first, if
necessary.
If you use this function, then for non-absolute encoders
you must confirm the positions of the rotary axes, which
the TNC displays in a pop-up window. The position
displayed is the last active position of the rotary axes
before switch-off.
Inappropriate switch-off of the TNC can lead to data loss!
Remember that pressing the END key after the control
has been shut down restarts the control. Switch-off
during a restart can also result in data loss!