HEIDENHAIN TNC 640, User Manual, Page: 833 / 948

Test Run and Program Run | Program run
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
833
Entering the program at any point: Mid-program
startup
Refer to your machine manual.
The
BLOCK SCAN
function must be enabled and
configured by the machine tool manufacturer.
With the
BLOCK SCAN
function you can start an NC program at any
desired NC block. The control factors workpiece machining up to
this NC block into the calculations.
If the NC program was interrupted under the following conditions,
the control saves the interruption point:
INTERNAL STOP
soft key
Emergency stop
Power failure
If, while restarting, the control finds a saved point of interruption,
then it outputs a message. You can then execute mid-program
startup directly at the point of interruption.
You can run the mid-program startup in the following ways:
Mid-program startup in the main program, with repetitions if
necessary
Multi-level mid-program startup in subprograms and touch probe
cycles
Mid-program startup in a point table
Block scan in pallet programs
At the start of mid-program startup the control resets all data,
as with a selection of the NC program. During the mid-program
startup, you can switch between
Program Run Full Sequence
and
Program Run Single Block
.
NOTICE
Danger of collision!
The
BLOCK SCAN
function skips over the programmed touch
probe cycles. As a result, the result parameters contain no
values or, possibly, incorrect values. If the subsequent machining
operation uses these result parameters, then there is a risk of
collision!
Use the
BLOCK SCAN
function at multiple levels
Further information: "Procedure for multi-level mid-program
startup", page 835
The
BLOCK SCAN
function must not be used in
conjunction with the following functions:
Active stretch filter
Touch probe cycles 0, 1, 3, and 4 during the search
phase of mid-program startup