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96-8000 rev R June 2007
Cutter Compensation
CUTTER COMPENSATION
Cutter compensation shifts the programmed tool path so that the centerline of the tool is moved to the left or right
of the programmed path. The OFFSET (Length and Radius) page is used to enter the amount that the tool is
shifted. The offset is entered as either a diameter/radius value (see setting 40) for both the geometry and wear
values. Note that If diameter is specified, the cutter compensation shift amount is half of the value entered. The
compensated value is calculated by the control from the values entered in the Radius (radius of the tool) and the
Wear (wear of the tool) values in the offsets page. In 2D machining cutter compensation is used in the X-axis and
the Y-axis (G17) and for 3D machining, cutter compensation is used in the X-axis, Y-axis and Z-axis (G141).
G41 will select cutter compensation left; that is, the tool is moved to the left of the programmed path.
G42 will select cutter compensation right.
G40 will cancel cutter compensation.
A Dnnn must also be programmed with G41or G42 to select the correct offset number from the radius/diameter
offset column. Offset values entered for the radius/diameter should be in positive numbers. If the offset contains a
negative value, cutter compensation will operate as though the opposite G code was specified. For example, a
negative value entered for a G41 will behave as if a positive value was entered for G42.
Selecting Yasnac for Setting 58, the control must be able to position the side of the tool along all of the edges of
the programmed contour without over cutting the next two motions. A circular motion joins all of the outside angles.
Selecting Fanuc for Setting 58, the control does not require that the tool cutting edge be placed along all edges of
the programmed contour, preventing over-cutting. Outside angles less than or equal to 270 degrees are joined by a
sharp corner and outside angles of more than 270 degrees are joined by an extra linear motion (See the following
diagrams).
The following diagrams show how cutter compensation works for the two values of Setting 58.
Note: When canceled, the programmed path returns to being the same as the center of the cutter path. Cancel
cutter comp (G40) before ending a program.
G41 or G42
in this Block
G40 in this Block
Programmed path
Actual center
of tool path
G41 with Positive Tool Diameter
or G42 with Negative
Tool Diameter
S
Radius
S
G40
in this Block
G41 or 42 in this Block
Programmed path
Actual center
of tool path
G42 with Positive Tool Diameter
or G41 with
Negative Tool Diameter
Radius
S
G40
in this
Block
G41 or 42
in this Block
Programmed path
Actual center
of tool path
G42 with Positive Tool Diameter
or G41 with Negative
Tool Diameter
Extra
Move
S
G41 or G42
in this
Block
G40 or G42
in this Block
Programmed path
Actual center
of tool path
Extra
Move
G41 with Positive Tool Diameter
or G42 with Negative
Tool Diameter
Содержание Mill
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