HEIDENHAIN TNC 320 User Manual page 568

15
Test Run and Program Run
15.5 Program run
Example
The power failed while a thread cutting cycle in the tilted working
plane was being performed. You have to retract the tap:
Switch on the power supply for control and machine. The TNC
starts the operating system. This process may take several
minutes. Then the TNC will display the message "Power
interrupted" in the screen header
Activate the Retraction mode: Press the
RETRACT soft key. The TNC displays the message
Retraction selected
Acknowledge the power interruption: Press the CE
key. The TNC compiles the PLC program.
Switch on the control voltage: The TNC checks the
functioning of the EMERGENCY STOP circuit. If
there is at least one undefined axis you will have
to compare the displayed positions with the actual
axis values and confirm they are correct, and, if
needed, following any instructions given in the
dialog
Check the preselected traverse mode: If required, select
THREAD
Check the preselected thread pitch: if required, enter the thread
pitch
Check the preselected direction of rotation: if needed, select
the turning direction of the thread
Right-handed thread: the main spindle turns clockwise when
moving into the workpiece, counter-clockwise when retracting
from it; left-handed thread: main spindle turns counter-clockwise
when moving into the workpiece and clockwise when retracting
from it
Activate retraction: Press the RETRACT soft key
Retraction: Retract the tool with the axis direction keys or the
electronic handwheel
Axis key Z+: Retraction from the workpiece
Axis key Z-: Moving into the workpiece
Exit retraction: Return to the original soft-key level
End the Retraction mode: Press the END
RETRACTION soft key. The TNC checks whether
the Retract mode can be exited, following any
instructions given in the dialog
Answer confirmation request: If the tool was not correctly
retracted, press the NO soft key. If the tool was correctly
retracted, press the YES soft key. The TNC hides Retraction
selectedmode
Initialize the machine: if required, cross the datums
Establish the desired machine condition: If required, reset the
tilted working plane
568
HEIDENHAIN | TNC 320 | Conversational Programming User's Manual | 9/2016