Yaskawa YASNAC PC NC Programming Manual - Manual (Page 34)

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YASNAC PCNC Programming Manual Chapter 2: Commands Calling Axis Movements
(a) Plane designation
With the commands indicated below, a cutting tool moves along the specified circular arc
in the XY plane, ZX plane, or YZ plane so that the feedrate specified by the F command
will be the tangential velocity of the arc.
•
In the XY Plane
G17 G02 (or G03) X • • • Y • • • R • • • (or I • • • J • • •) F • • •;
•
In the ZX Plane
G18 G02 (or G03) Z • • • X • • • R • • • (or K • • • I • • •) F • • •;
•
In the YZ Plane
G19 G02 (or G03) Y • • • Z • • • R • • • (or J • • • K • • •) F • • •;
• To designate the circular interpolation mode (G02, G03), the plane of interpolation
should be selected first by specifying the G17, G18, or G19. For the 4th- and 5th-axis,
circular interpolation is allowed only when they are linear axes.
The G code designated to select the plane in which circular interpolation is executed
also selects the plane where tool radius offset (G41/G42) is executed.
When the power is turned ON, the XY plane (G17) is automatically selected.
• If an optional linear 4th-axis is selected, circular interpolation is possible in the Xa, Za,
or Ya plane which includes the 4th-axis in addition to the XY, YZ, and ZX planes. (a =
U, V, or W)
•
Circular interpolation in Xa plane
G17 G02 (or G03) X • • • a • • • R • • • (or I • • • J • • •) F • • •;
•
Circular interpolation in Ya plane
G18 G02 (or G03) Z • • • a • • • R • • • (or K • • • I • • •) F • • •;
•
Circular interpolation in Za plane
G19 G02 (or G03) Y • • • a • • • R • • • (or J • • • K • • •) F • • •;
G17 XY plane, or X
α
or X
β
plane
G18 ZX plane, or Z
α
or Z
β
plane
G19 YZ plane, or Y
α
or Y
β
plane