Tool length compensation function

►When using different specifications of the cutting tool and tool wear, can through the dimension of tool length compensation instruction compensation, without having to adjust the knives or the knife again.

1 programming format

For FANUC system, tool length compensation instructions for G43, G44 and G49 G43 for tool length compensation G44 for the tool length compensation G49 instruction for undo tool length compensation.


1) the establishment of the cutting tool length compensation in the programming format:

Programming is a Z__ value, H is length compensation value register number.Offset correspond to offset number, by the CRT/MDI operation panel in offset storage in advance.using G43, G44 commands, no matter use absolute size or with increment size programming, specified in the program of the Z axis coordinate values at either end of the move, with H (D) operations registers within the specified offset, G43 addition, G44 is presupposed, and the operation result as end point coordinate values for processing.G43, G44 are modal code.

When performing a G43:

The actual value Z = Z value + (H x)

When performing a G44:

The actual value Z = Z value - (H x)

Type: H xx register refers to the number of tool length compensation amount.

2) programming tool length compensation cancel formats:

G00 (G01) G49 Z_

Or G00 G43 / G44Z_H00 (G01)

Note 2

(1) the establishment of the cutting tool length compensation can only take effect under the movement instruction.

(2) some numerical control system, such as FAGOR 8055 m, using G43 activation tool length compensation (plus/minus operation depends on the amount of bias in the register of the positive and negative) G44 cancel the tool length compensation.

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