HEIDENHAIN TNC 640 User Manual page 839

Test Run and Program Run | Program run
Returning to the contour
With the RESTORE POSITION function, the control moves the tool
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 with a block scan with
RESTORE POS AT N, for example, after an interruption with
INTERNAL STOP
Depending on the machine, if the position of an axis has
changed after the control loop has been opened during a
program interruption
Procedure
Proceed as follows to approach the contour:
Press the RESTORE POSITION soft key
Restore the machine status, if required
Approach the axes in the sequence shown by the control:
Press the NC Start key
Approach the axes according to individually selected sequence:
Press the SELECT AXIS soft key
Press the axis soft key of the first axis
Press the NC Start key
Press the axis soft key of the second axis
Press the NC Start key
Repeat the process for all axes
If the tool is located in the tool axis below the starting
point, then the control offers the tool axis as the first
traverse direction.
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
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