HEIDENHAIN iTNC 530 (340 422) ISO programming - Manual (Page 166)

166 6 Programming: Programming Contours
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Entering more than three coordinates
The TNC can control up to 5 axes simultaneously. Machining with 5
axes, for example, moves 3 linear and 2 rotary axes simultaneously.
Such programs are too complex to program at the machine, however,
and are usually created with a CAD system.
Example:
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 a circle
center.
When you program a circle, the TNC 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 for circular movements
If a circular path has no tangential transition to another
contour element, enter the direction of rotation with the following
functions:
n Clockwise direction of rotation: G02/G12
n Counterclockwise direction of rotation: G03/G13
N G01 G40 X+20 Y+10 Z+2 A+15 C+6 F100 M3 *
The TNC graphics cannot simulate movements in more
than three axes.
Tool axis Main plane Circle center
Z (G17) XY, also
UV, XV, UY I, J
Y (G18) ZX, also
WU, ZU, WX K, I
X (G19) YZ, also
VW, YW, VZ J, K
You can program circles that do not lie parallel to a main
plane by using the function for tilting the working plane
(see “WORKING PLANE (Cycle G80),” page 389) or Q
parameters (see “Principle and Overview,” page 418).
X
Y
X
Y
I
J
G02/G12
G03/G13
X
Z
Y