Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 14.COMPENSATION FUNCTION
- 541 -
control, therefore, the compensation vector is calculated with B
set to 30.0.
- Look-ahead acceleration/deceleration before interpolation
When using tool center point control, also use look-ahead
acceleration/deceleration before interpolation. If look-ahead
acceleration/deceleration before interpolation is not used, the feedrate
may exceed the maximum cutting feedrate as a result of tool center
point control, which will cause alarm OT0553 to be issued.
Example:
Interpolation path
Tool tip center path
In the above example, the feedrate is controlled so that the tool tip
center moves at a specified feedrate. As a result, a higher feedrate than
the specified feedrate is detected on the interpolation path. In such a
case, if look-ahead acceleration/deceleration before interpolation is
used, the feedrate is clamped so that the feedrate on the interpolation
path does not exceed the maximum cutting feedrate. If look-ahead
acceleration/deceleration before interpolation is not used, the feedrate
on the interpolation path may become higher than the maximum cutting
feedrate, resulting in alarm OT0553 being issued.
- Functions resulting in the same operation as tool length compensation along the
tool axis
Functions resulting in the same operation as tool length compensation in a
specified direction
When the following functions are used in tool center point control
mode, the same operation as tool length compensation along the tool
axis (type 1) or tool length compensation in a specified direction (type
2) results:
-Specification of an axis not related to tool center point control
-Skip function (G31 to G31.9)
-Unidirectional positioning (G60)
-The following G functions of group 01:
Circular interpolation, helical interpolation, spiral interpolation,
conical interpolation (G02, G03)
Circular threading B (G2.1, G3.1)
Involute interpolation (G2.2, G3.2)
Three-dimensional circular interpolation (G2.4, G3.4)
Threading (G33)
-Selection of a workpiece coordinate system (G54 to G59)
-Setting of a workpiece coordinate system (G92)
-Feed per revolution (G95)

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