HEIDENHAIN TNC 426, User Manual

Page: 439 / 502

HEIDENHAIN TNC 426, TNC 430 413
1
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n
U To go to the first block of the current program to start a block scan,
enter GOTO “0”.
U To select mid-program startup, press the RESTORE
POS AT N soft key.
U
Start-up at N
: Enter the block number N at which the
block scan should end.
U
Program
: Enter the name of the program containing
block N.
U
Repetitions
: If block N is located in a program section
repeat, enter the number of repetitions to be
calculated in the block scan.
U To start the block scan, press the machine START
button.
U To return to the contour, see “Returning to the
contour,” page 413
Returning to the contour
With the RESTORE POSITION function, the TNC returns to the
workpiece contour in the following situations:
n
Return to the contour after the machine axes were moved during a
program interruption that was not performed with the INTERNAL
STOP function.
n
Return to the contour after a block scan with RESTORE POS AT N,
for example after an interruption with INTERNAL STOP.
n
Depending on the machine, if the position of an axis has changed
after the control loop has been opened during a program
interruption:
U
To select a return to contour, press the RESTORE POSITION soft
key.
U To move the axes in the sequence that the TNC suggests on the
screen, press the machine START button.
U
To move the axes in any sequence, press the soft keys RESTORE
X, RESTORE Z, etc., and activate each axis with the machine START
key.
U To resume machining, press the machine START key.