G02 CW / G03 CCW Circular Interpolation Motion (Group 01)

Classic Control - Lathe Operator's Manual

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G02 CW/G03 CCW Circular Interpolation Motion (Group 01)

F - Feed rate *I - Distance along X-axis to center of circle *J - Distance along Y-axis to center of circle *K - Distance along Z-axis to center of circle *R - Radius of arc *U - X-axis incremental motion command *W - Z-axis incremental motion command *X - X-axis absolute motion command *Y - Y-axis absolute motion command *Z - Z-axis absolute motion command

* indicates optional

These G codes are used to specify a circular motion (CW or CCW) of the linear axes (Circular motion is possible in the X and Z axes as selected by G18). The X and Z values are used to specify the end point of the motion and can use either absolute (X and Z) or incremental motion (U and W). If either the X or Z is not specified, the endpoint of the arc is the same as the starting point for that axis. There are two ways to specify the center of the circular motion; the first uses I or K to specify the distance from the starting point to the center of the arc; the second uses R to specify the radius of the arc.

For information on G17 and G19 Plane Milling, see the Live Tooling section.

G02 Axis Definitions: [1] Turret Lathes, [2] Table Lathes.

G02 and G03 Programs

R is used to specify the radius of the arc. With a positive R, the control will generate a path of 180 degrees or less; to generate a radius of over 180 degrees, specify a negative R. X or Z is required to specify an endpoint if different from the starting point.

The following lines cut an arc of less than 180 degrees:

G01 X3.0 Z4.0 ;
G02 Z-3.0 R5.0 ;

G02 Arc Using Radius

I and K are used to specify the center of the arc. When I and K are used, R may not be used. The I or K is the signed distance from the starting point to the center of the circle. If only one of I or K is specified, the other is assumed to be zero.

G02 Defined X and Z: [1] Start.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.