5
ShopTurn Functions 08/2005
5.1 Strai
ht or circular
ath movements
5
♥ Siemens AG, 2005. All rights reserved
5-166 SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
5.1.7 Circular polar
If you want to program a circle or arc using polar coordinates, you can
use the "Circle polar" function.
A circle in the polar coordinate system is defined by an angle α. The
angle is based on another axis depending on the machining plane.
The direction in which a positive angle points also depends on the
machining plane.
Machining plane Turning Face Overall
Reference axis for angle Z X Y
Positive angle in direction of the axis X Y Z
The tool traverses a circular path from its current position to the
programmed end point (angle) at the machining feedrate.
The radius is obtained from the distance between the current tool
position and the defined pole, i.e. the circle start and end point
positions are at the same distance from the pole.
The 1st arc in polar coordinates entered after the pole must be
programmed in absolute dimensions. You can program any further
lines or circles with incremental coordinates.
Polar >
Circle
polar >
¾ Press the "Strai. Circle", "Polar" and "Circle polar" soft keys.
Parameters Description Unit
Direction of
rotation
Direction of rotation in which the tool travels from the circle starting point to the circle
end point
Direction of rotation clockwise (right)
Direction of rotation counterclockwise (left)
α
Polar angle (abs or inc)
The sign specifies the direction.
Degrees
F Machining feedrate mm/rev
mm/min
mm/tooth
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