Syntax
Requirements
The position of a plane in space is clearly defined by two solid angles. The plane would be "over-
defined" by the specification of a third solid angle. It is therefore not permitted.
If only one solid angle is programmed, the rotation of the WCS is identical to ROT, AROT (see
Section "Programmable rotation (ROT, AROT, RPL) (Page 316)").
Through the two programmed axes, a plane is specified according to the plane definitions for
G17, G18, G19. This defines the sequence of the coordinate axes (1st axis / 2nd axis of the
plane) or the sequence of the rotations through the solid angles:
Plane 1st axis 2nd axis
G17 X Y
G18 Z X
G19 Y Z
Alignment of the G17 plane ⇒ solid angle for X and Y
● 1st rotation: X around Y through the angle α
● 2nd rotation: Y around X' through the angle β
● Orientation: X' is in the original Z/X plane.
ROTS X<α> Y<β>
AROTS X<α> Y<β>
CROTS X<α> Y<β>
Alignment of the G18 plane ⇒ solid angle for Z and X
● 1st rotation: Z around X through the angle γ
● 2nd rotation: X around Z' through the angle α
● Orientation: Z' is in the original Y/Z plane
ROTS Z<γ> X<α>
AROTS Z<γ> X<α>
CROTS Z<γ> X<α>
Alignment of the G19 plane ⇒ solid angle for Y and Z
● 1st rotation: Y around Z through the angle β
● 2nd rotation: Z around Y' through the angle γ
● Orientation: Y' is in the original X/Z plane.
ROTS Y<β> Z<γ>
AROTS Y<β> Z<γ>
CROTS Y<β> Z<γ>
Fundamentals
2.12 Coordinate transformations (frames)
NC programming
324 Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
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