HEIDENHAIN TNC 370 User Manual page 114

5 Programming Tool Movements
5.4 Path Contours - Cartesian Coordinates
Radius compensation in circular paths
You cannot begin radius compensation in a circle block. It must be
activated beforehand in a line block.
Circles in the main planes
When you program a circle, the TNC assigns it to
one of the main planes. This plane is automatically
defined when you set the spindle axis during TOOL
CALL.
Main plane
XY
WV. xv. UY)
Y zx
&vu. zu. wx)
X YZ
WV, YW. vi?
I
Fig. 5.21: Defining the spindle axis also defines the main plane
You can program circles that do not fie paraltel to a main plane by using Q parameters, See Chapter 7.
-- Circle center CC
If you program an arc using the C path function key, you must first define
the circle center CC by:
VA
l
entering the Cartesian coordinates of the circle center
l
using the circle center defined in an earlier block
l
capturing the actual position
Y
-- --------
You can define the last programmed position as circle center CC by
cc
+
C
entering an empty CC block.
I
I
I
I
I
I
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I
t
X
cc
X
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Fig. 5.22: Circle center CC
Duration of a circle center definition
A circle center definition remains effective until a new circle center is
defined.
L
TNC 370
5-l 5