HEIDENHAIN TNC 320 (77185x-01) ISO programming - Manual (Page 175)

Tool compensation 5.3
5
TNC 320 | User's Manual for DIN/ISO Programming | 3/2014
175
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
G41or
G42.
The TNC automatically cancels radius compensation
if you:
program a straight line block with G40
program a PGM CALL
Select a new program with PGM MGT
For radius compensation, the TNC takes the delta values from both
the
T block and the tool table into account:
Compensation value = R + DR
TOOL CALL
+ DR
TAB
where
R: Tool radius R from the G99 block or tool table
DR
TOOL
CALL
:
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