HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 119)

TNC 425/TNC 415 B/TNC 407 5-20
5 Programming Tool Movements
Fig. 5.26: Circle center CC
Fig. 5.25: Defining the spindle axis also defines the main plane
Spindle axis
Z
Y
X
Main plane
XY (UV, XV, UY)
ZX (WU, ZU, WX)
YZ (VW, YW, VZ)
5.4 Path Contours - Cartesian Coordinates
Y
X
Y
CC
X
Radius compensation in circular paths
You cannot begin a radius compensation in a circle block. It must be
activated beforehand in a line block (L block) or in the APPR 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.
You can program circles that do not lie parallel to a main plane by using Q parameters. (see Chapter 7) or the TNC
function for tilting the working plane (see page 8-55).
Circle Center CC
If you program an arc using the C path function key, you must first define
the circle center CC by:
• entering the Cartesian coordinates of the circle center
• using the circle center defined in an earlier block
• capturing the actual position
You can define the last programmed position as circle center by entering
an empty CC block.
Validity of a circle center definition
A circle center definition remains effective until a new circle center is
defined. The circle center can also be entered for the secondary axes U, V,
and W.