HEIDENHAIN TNC 620, User Manual

Page: 279 / 521

Testing and running | Program run
Example: Retracting the spindle after tool breakage
Interrupt machining
Enable the axis-direction keys: Press the
MANUAL TRAVERSE
soft
key
Move the machine axes with the axis direction keys
Refer to your machine manual.
On some machines, you may have to press the
NC start
key after the
MANUAL TRAVERSE
soft key to enable the
axis-direction keys.
Resuming program run after an interruption
The control saves the following data during a program interruption:
The last tool that was called
Current coordinate transformations (e.g., datum shift, rotation,
mirroring)
The coordinates of the circle center that was last defined
The control uses the stored data for returning the tool to the contour
after manual machine axis positioning during an interruption
(
RESTORE POSITION
soft key).
Operating notes:
The saved data remains active until it is reset (e.g., by
selecting a program).
If you interrupt an NC program using the
INTERNAL STOP
soft key, you have to start
machining at the start of the program or by using the
BLOCK SCAN
function.
For program interruptions within program-section
repeats or subprograms, you have to use the
BLOCK SCAN
function for re-entering at the point of
interruption.
With machining cycles, mid-program startup is always
executed at the start of the cycle. If you interrupt a
program run during a machining cycle, the control
repeats machining steps already carried out after a
block scan.
Resuming the program run with the NC Start key
You can resume program run by pressing the
NC start
key if the
NC program was stopped in one of the following ways:
Press the
NC Stop
key
Programmed interruption
Resuming program run after an error
With an erasable error message:
Remove the cause of the error
Clear the error message from the screen: Press the
CE
key
Restart the program, or resume program run where it was
interrupted
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HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
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