Circle Polar - Siemens SINUMERIK 840D Operating Manual

8.7.13

Circle polar

A circle in the polar coordinate system is defined by an angle (α). The angle refers to the X
axis.
The tool moves from its actual position on a circular path to the programmed end point
(angle) at the machining feedrate. The radius corresponds to the distance from the actual
tool position to the defined pole, i.e. the circle starting and end point positions are at the
same distance from the defined pole.
The 1st arc in polar coordinates entered after the pole must be programmed with an absolute
angle. You can program any additional straight lines or circles with incremental coordinates.
Procedure
Parameter
Direction of rotation
F
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
1. The ShopMill program to be edited has been created and you are in
the editor.
2. Press the menu forward key and the "Straight Circle" softkey.
3. Press the "Polar" and "Circle polar" softkeys.
Description
The tool travels in the programmed direction from the circle starting point to its end
point. You can program this direction as clockwise (right) or counterclockwise
(left).
Clockwise direction of rotation
Counterclockwise direction of rotation
Polar angle to the pole, end point (abs) or
change in polar angle to the pole, end point (inc)
Machining feedrate
Programming technological functions (cycles)
8.7 Further cycles and functions ShopMill
Unit
Degrees
mm/rev
mm/min
mm/tooth
433