Circle Polar - Siemens SINUMERIK 840D sl Operating Manual

Parameters
L
α
F
Radius compensation
8.7.16

Circle 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 the angle α. Depending on the selected
machining plane, the angle refers to another axis. The direction in which a positive angle
points also depends on the machining plane.
Machining plane
Reference axis for angle
Positive angle in direction of the axis
The tool traverses a circular path from its actual position to the programmed end point
(angle) at the machining feedrate. The radius is obtained from the distance between the
actual 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 additional lines or arcs also in incremental dimensions.
Turning
Operating Manual, 03/2013, 6FC5398-8CP40-3BA1
Description
Distance to the pole, end point
Polar angle to the pole, end point (abs) or
Polar angle change to the pole, end point (inc)
The sign specifies the direction.
Machining feedrate
Input defining which side of the contour the cutter travels in the traversing
direction:
Radius compensation to left of contour
Radius compensation to right of contour
Radius compensation off
The set radius compensation remains as previously set
Programming technology functions (cycles)
8.7 Additional cycles and functions in ShopTurn
Rotate Face
Z X
X Y
Unit
mm
Degrees
mm/rev
mm/min
mm/tooth
Peripheral
Y
Z
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