Specifications

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CONCISE GUIDE FANUC 41

3.13 “G54 / G59” WORKPIECE ORIGINS

To be able to refer the tool movements to a fixed point on the workpiece to be machined. By means of a

certain operation procedure one or more fixed points are defined that allow the operator to have a

reference for the movements to be entered in the work program. These points are called “WORKPIECE

ORIGINS” (G54, G55, …G59). Usually these points are on the front of the workpiece near the spindle

rotating axis.

There is also a fixed reference point that cannot be modified , created by the machine manufacturer. This

point is called MACHINE ORIGIN (G53).

This point is used as a primary reference point and as a consequence to define the Workpiece Origins. In

other words, the Workpiece Origins are found as the distance between the fixed point of the machine

(G53) and our reference point on the workpiece. There is, in fact, a table where the distances from the

Machine Origin are entered for each Workpiece Origin. In the work program it is sufficient to enter the

call-up for the required origin to make it active (example: G54) without any value.

When programming, movements in relation to the machine origin G53 are only allowed in rapid traverse

(with G0 movements).

G54

G53

disk

turret

disk

origin

Machine axis