Heidenhain TNC 320 (77185x-01) ISO programming User Manual Page 88

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Programming: Fundamentals, file management
3.2 Opening programs and entering
3
88
TNC 320 | User's Manual for DIN/ISO Programming | 3/2014
Define the blank: G30/G31
Immediately after initiating a new program, you define a cuboid,
unmachined workpiece blank. If you wish to define the blank at a
later stage, press the spec fct key, the PROGRAM DEFAULTS soft
key, and then the BLK FORM soft key. The TNC needs this definition
for graphic simulation.
You only need to define the workpiece blank if you
wish to run a graphic test for the program!
The TNC can depict various types of blank forms.
Soft key Function
Define a workpiece blank
Define a cylindrical blank
Define a rotationally symmetric blank
Rectangular blank
The sides of the cuboid lie parallel to the X, Y and Z axes. This
blank is defined by two of its corner points:
MIN point G30: the smallest X, Y and Z coordinates of the blank
form, entered as absolute values
MAX point G31: the largest X, Y and Z coordinates of the blank
form, entered as absolute or incremental values
Example: Display the BLK FORM in the NC program
%NEW G71 *
Program begin, name, unit of measure
N10 G30 G17 X+0 Y+0 Z-40 *
Spindle axis, MIN point coordinates
N20 G31 X+100 Y+100 Z+0 *
MAX point coordinates
N99999999 %NEW G71 *
Program end, name, unit of measure
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