HEIDENHAIN TNC 320 (340 551-02) - Manual (Page 118)

118 6 Programming: Programming Contours
6.2 F
u
ndamentals of P
a
th F
u
nctions
Circles and circular arcs
The TNC moves two axes simultaneously in a circular path relative to
the workpiece. You can define a circular movement by entering the
circle center CC.
When you program a circle, the control assigns it to one of the main
planes. This plane is defined automatically when you set the spindle
axis during a TOOL CALL:
Direction of rotation DR for circular movements
If a circular path has no tangential transition to another
contour element, enter the direction of rotation DR:
Clockwise direction of rotation: DR–
Counterclockwise direction of rotation: DR+
Spindle axis Main plane
Z XY, also
UV, XV, UY
Y ZX, also
WU, ZU, WX
X YZ, also
VW, YW, VZ
X
Y
X
Y
CC
X
CC
Y
CC
CC
CC
DR–
DR+
X
Z
Y