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

B-63324EN/03 PROGRAMMING 4.INTERPOLATION FUNCTIONS
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If the modal code is changed by specifying a code such as G01 with the
end point not specified, the arc cannot be obtained, and alarm PS0712
is issued. During MDI operation, alarm PS0712 is also issued if a cycle
start is applied with only the mid-point specified.
- Movement along axes other than the 3-dimensional circular interpolation axis
In addition to the 3-dimensional circular interpolation axis (X/Y/Z), up
to two arbitrary axes ( / ) can be specified at a time. If / are omitted
from the first block (mid-point specification) and are specified only in
the second block (end point specification), the tool moves to the
specified point along the / axes during movement from the mid-point
of the arc to the end point. If / are omitted from the second block (end
point specification) and are specified only in the first block (mid-point
specification), the tool moves to the specified point along the / axes
during movement from the start point of the arc to the mid-point.
- Incremental commands
With an incremental command, the position of the mid-point relative to
the start point must be specified in the first block, and the position of
the end point relative to the mid-point must be specified in the second
block.
- Direction of rotation
The direction of rotation cannot be specified. The movement is the
same regardless of whether G02.4 or G03.4 is specified.
- Single block
When operation is performed using a single block, one cycle start
causes movement from the start point to the end point. A single-block
stop is not performed between the first block (mid-point specification)
and the second block (end point specification).
- Start point assumed if 3-dimensional circular interpolations are specified
consecutively
If 3-dimensional circular interpolations are specified consecutively, the
end point in one interpolation is assumed to be the start point in the next
interpolation.
- Velocity commands
Velocity commands follow HTG (bit 2 of parameter No. 1401), in the
same as for helical interpolation. If HTG is equal to 0, specify the
tangent velocity along an arc in the 3-dimensional space. If HTG is
equal to 1, specify the tangent velocity including the velocities along
the specified arbitrary axes other than the 3-dimensional circular
interpolation axis.
Limitation
- Functions that cannot be specified
In the mode for this function, the following functions cannot be used:
- Functions related to cutter raiuds compensation
(group 07)
- 3-dimensional coordinate conversion
- Coordinate system rotation
- Scaling
- Programmable mirror image

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