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Define the blank: blk form, Opening and entering programs 3.2 – HEIDENHAIN TNC 128 (77184x-02) User Manual

Page 85

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Opening and entering programs

3.2

3

TNC 128 | User's Manual HEIDENHAIN Conversational Programming | 5/2014

85

Define the blank: BLK FORM

Immediately after initiating a new program, you define an
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 rectangular blank

Define a cylindrical 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: the smallest X, Y and Z coordinates of the blank
form, entered as absolute values

MAX point: 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

0 BEGIN PGM NEW MM

Program begin, name, unit of measure

1 BLK FORM 0.1 Z X+0 Y+0 Z-40

Spindle axis, MIN point coordinates

2 BLK FORM 0.2 X+100 Y+100 Z+0

MAX point coordinates

3 END PGM NEW MM

Program end, name, unit of measure