HEIDENHAIN iTNC 530 (340 420) ISO programming - Manual (Page 143)

HEIDENHAIN iTNC 530 143
5.3 T
ool Compensation
Tool radius compensation
The NC block for programming a tool movement contains:
n G41 or G42 for radius compensation,
n
G43 or G44, for radius compensation with axis-parallel traverse,
n
G40 if there is no radius compensation.
Radius compensation becomes effective as soon as a tool is called
and is moved in the working plane with G41 or G42.
For tool radius compensation, the TNC takes the delta values from
both the T block and the tool table into account.
Compensation value = R + DR
T
+ DR
TAB
, where
Contouring without radius compensation: R0
The tool center moves in the working plane along the programmed
path or to the programmed coordinates.
Applications: Drilling and boring, pre-positioning.
The TNC automatically cancels radius compensation if
you:
n
program a positioning block with G40,
n
program a program call with %...,
n select a new program with PGM MGT.
R is the tool radius R from the G99 block or tool table
DR
T
is the oversize for radius DR in the T block (not taken into
account by the position display)
DR
TAB
is the oversize for radius DR in the tool table.
R
R
G40
G41
Y
X
Z
X
Y