Tools | Tool compensation
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HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
Tool radius compensation
The block for programming a tool movement contains:
G41 or G42 for radius compensation
G40, if there is no radius compensation
The radius compensation is effective as soon as a tool is called and
traversed with a straight-line block in the working plane with G41 or
G42.
The control automatically cancels radius compensation
in the following cases:
Straight-line block with G40
DEP function for departing from the contour
Selection a new program via PGM MGT
For radius compensation, the control takes the delta values from
both the T block and the tool table into account:
Compensation value = R + DR
CALLT block
+ DR
TAB
with
R: Tool radius R from G99 block or tool table
DR
CALLT block
: Oversize for radius DR in the T block
DR
TAB
: Oversize for radius DR in the tool table
Contouring without radius compensation: G40
The tool center moves in the working plane along the programmed
path, or to the programmed coordinates.
Applications: Drilling and boring, pre-positioning
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