Siemens SINUMERIK 808D User Manual page 83

Po lar angle AP=...
The angle is always referred to the horizontal axis (abscissa) of the plane (for example, with G17: X axis). Positive or
negative angle specifications are possible.
The polar angle remains stored and must only be written in blocks in which it changes, after changing the pole or when
switching the plane.
See the following illustration for polar radius and polar angle with definition of the positive direction in different planes:
Po le definition, programming
G110 Pole specification relative to the setpoint position last programmed (in the plane, e.g. with G17: X/Y)
G111 ; Pole specification relative to the origin of the current workpiece coordinate system (in the plane, e.g. with
G17: X/Y)
G112 ; Pole specification, relative to the last valid pole; preserve plane
N o te
Po le specifications
Pole definitions can also be performed using polar coordinates. This makes sense if a pole already exists.
•
If no pole is defined, the origin of the current workpiece coordinate system will act as the pole.
•
Programming example
N10 G17
N20 G0 X0 Y0
N30 G111 X20 Y10
N40 G1 RP=50 AP=30 F1000
N50 G110 X-10 Y20
N60 G1 RP=30 AP=45 F1000
N70 G112 X40 Y20
N80 G1 RP=30 AP=135
M30
Tra versing with polar coordinates
The positions programmed using polar coordinates can also be traversed as positions specified with Cartesian coordinates
as follows:
● G0 - linear interpolation with rapid traverse
● G1 - linear interpolation with feedrate
● G2 - circular interpolation CW
● G3 - circular interpolation CCW
(See also Sections "Linear interpolation (Page 91)" and "Circular interpolation (Page 93)".)
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
; X/Y plane
; Pole coordinates in the current workpiece coordinate system
; New pole, relative to the last pole as a polar coordinate
; Polar coordinate
83