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14 The Tool Compensation
97
Fig. 14.5.4-1
14.5.4 Change of Offset Direction While in the Offset Mode
The direction of tool-radius compensation computation is given in the Table below.
Radius compensation: positive Radius compensation: negative
G41 left right
G42 right left
The direction of offset mode can be reversed even during the computation of tool radius
compensation. This can be accomplished by programming G41 or G42, or by calling a tool radius
compensation of an opposite sign at address D. When the direction of offset mode is reversed, the
control will not check it for being "outside", it will always calculate a point of intersection in first
steps. The Figures below assume positive tool radii and change-overs from G42 to G41.