Heidenhain TNC 620 (81760x-01) ISO programming User Manual Page 186

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Programming: Programming contours
6.2 Fundamentals of Path Functions
6
186
TNC 620 | User's Manual for DIN/ISO Programming | 3/2014
Three-dimensional movement
The program block contains three coordinates. The TNC thus
moves the tool in space to the programmed position.
Example
N50 G01 X+80 Y+0 Z-10 *
Circles and circular arcs
The TNC moves two 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 Main plane
(G17) XY, also UV, XY, UY
(G18) ZX, also WU, ZU, WX
(G19) YZ, also VW, YW, VZ
You can program circles that do not lie parallel
to a main plane by using the function for tilting
the working plane (see User's Manual for Cycles,
Cycle 19, WORKING PLANE) or Q parameters (See
"Principle and overview of functions", page 252).
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: G02/G12
Counterclockwise direction of rotation: G03/G13
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