HEIDENHAIN TNC 620 (340 56x-01) - Manual (Page 472)

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 To go to the first block of the current program to start a block scan,
enter GOTO “0”.
 To select mid-program startup, press the RESTORE
POS AT N soft key.
 Start-up at N: Enter the block number N at which the
block scan should end.
 Program: Enter the name of the program containing
block N.
 Repetitions: If block N is located in a program section
repeat, enter the number of repetitions to be
calculated in the block scan.
 To start the block scan, press the machine START
button.
 Contour approach (see following section)
Returning to the contour
With the RESTORE POSITION function, the TNC returns to the
workpiece contour in the following situations:
„ Return to the contour after the machine axes were moved during a
program interruption that was not performed with the
INTERNAL STOP function.
„ Return to the contour after a block scan with RESTORE POS AT, for
example after an interruption with INTERNAL STOP.
 To select returning to the contour, press the RESTORE POSITION
soft key.
 Restore machine status, if required.
 To move the axes in the sequence that the TNC suggests on the
screen, press the machine START button.
 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.
 Press the LOG FILES soft key.
 To resume machining, press the machine START key.