Mitsubishi Electric CR750-Q Instruction Manual page 639

With arc designation, two consecutive blocks must always be designated. If only one block is designated,
the error L2613 (not enough points designated for arc) will occur.
Furthermore, if the three points used to form an arc by specifying two blocks are aligned in a straight line
and arc generation is not possible, error L2613 (block data calculation error (Cir.Arc)) will occur.
A: Arc designated
B: Arc not designated
B
Fig.7-15:Example of error in arc designation (Spline file version 02)
Spline file version 02
The spline file version 02 is supported with the following software version.
Controller: Ver. R6b/S6b or later
RT ToolBox2: Ver. 3.40S or later
2) Spline file version 01
When three consecutive path points are designated as an arc, the curve that connects those three points
will be an arc instead of a spline. If this is applied at a section requiring an arc-shaped curve, such as at a
corner, an accurate arc can be drawn with fewer path points than the spline curve.
Fig.7-16:Arc designation (Spline file version 01)
With arc designation, three consecutive path points must always be designated. If only one point is desig-
nated, the designation will be ignored, and a spline curve will be drawn. If only two points are designated,
the error L2613 (not enough points designated for arc) will occur.
If the three designated points are on a straight line and the arc cannot be generated, the error L2613 (block
data calculation error (Cir. Arc)) will occur.
A: Arc designated
A:円弧指定あり
B: Arc not designated
B:円弧指定なし
B
Fig.7-17:Example of error in arc designation (Spline file version 01)
Arc curve
A
A
A
A
Arc curve
Arc designation
円弧指定
Arc curve
円弧曲線
A
A
A
Arc curve
A
円弧曲線
B
B
A
B
Error occurs since only one block is
designated for arc
B
B
A
A
A
Error occurs since
円弧指定が２点だけ
only two points are
なのでエラー発生
designated for arc
B
These 3 path
この３点の経路点を
points are desig-
円弧指定
nated as arc
Spline interpolation Appendix-619
7Appendix