Polar Coordinates - Siemens SINUMERIK 840D sl Operation/Programming Manual

Creating a ShopTurn Program
4
4.2 Bases

4.2.4 Polar coordinates

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You can specify positions using right-angled coordinates or polar
coordinates.
If a point in a workpiece drawing is defined by a value for each
coordinate axis, you can easily input the position into the parameter
screen form using right-angled coordinates. For workpieces that are
dimensioned with arcs or angular data, it is often easier if you input
the positions using polar coordinates.
You can only program polar coordinates for the functions "Straight
circle" and "Contour milling".
The point from which the dimensioning starts in polar coordinates is
called the "pole".

Polar coordinates

The position specifications for the pole and points P1 to P3 in polar
coordinates are:
Pole:
X30 Z30
α30°
P1:
L30
α60°
P2:
L30
α90°
P3:
L30
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
X
P3
P2
P1
30°
30°
30°
Pole
30
(relative to the zero-point)
(relative to the pole)
(relative to the pole)
(relative to the pole)
♥ Siemens AG, 2005. All rights reserved
08/2005
4
Z