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MITSUBISHI CNC
III Functional Specifications
9.3.2 Compensation Memory
9.3.2.1 Tool Shape/Wear Compensation Amount
M720VW
M system
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L system
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This function registers the tool shape compensation and wear compensation amounts. Compensation may
encompass two or more axes.
(1) Shape compensation amount
The tool length compensation amount, tool radius compensation amount, nose radius
compensation amount, nose radius imaginary tool tip point or tool width can be set as the shape
compensation amount.
The compensation amount that can be set and used differs depending on whether compensation
amount setting type 1, 2 or 3 is used.
(2) Wear compensation amount
When the tip of the tool used has become worn, the wear compensation amount is used to
compensate this wear. Types of wear compensation amounts include the tool length wear
compensation amount, tool radius wear compensation amount, and nose radius wear
compensation amount.
The wear compensation amount can be used with compensation amount setting types 2 and 3, and
it is added to the shape compensation amount for compensation.
(a) Type 1: 1-axis compensation amount [M system]
This is the value that is used by rotary tools.
As the tool length compensation amount, among the compensation amounts for the position of
the tool moving in the direction parallel to the control axis, the compensation amount in the
longitudinal direction of the rotary tool is registered. The tool length compensation amount is
set as a minus value.
As the tool radius compensation amount, among the compensation amounts for the position of
the tool moving in the direction parallel to the control axis, the compensation amount in the
radial direction of the rotary tool is registered. The tool radius compensation amount is set as a
plus value.
One compensation amount data is registered in one compensation No., and the compensation
Nos. are assigned using the address D or H commands. When a No. is assigned by a D
address command, compensation is provided in the form of the tool radius; when it is assigned
by an H address command, it is provided in the form of the tool length.
III - 134
M730VW
M750VW
M720VS
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M730VS
M750VS
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