HEIDENHAIN TNC 620 User Manual page 275

Programming Contours | Fundamentals of path functions
Three-dimensional movement
If the NC block contains three coordinates, the control moves the
tool spatially to the programmed position.
Example
L X+80 Y+0 Z-10
Circles and circular arcs
The control moves two machine axes simultaneously on 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:
Spindle axis
Z
Y
X
You can program circles that do not lie parallel to a main
plane by using the function for Tilt working plane or
with Q parameters.
Further information:
working plane (option 8)", page 535
Further information:
functions", page 366
Direction of rotation DR for circular movements
When a circular path has no tangential transition to another contour
element, enter the direction of rotation as follows:
Clockwise direction of rotation: DR-
Counterclockwise direction of rotation: DR+
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
Main plane
XY, also UV, XV, UY
ZX, also WU, ZU, WX
YZ, also VW, YW, VZ
"The PLANE function: Tilting the
"Principle and overview of
7
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