Hi!  Does anybody have any experience with NURBS curves?  I'm trying to
create a closed curve.  It's my understanding that with a uniform b-spline
(i.e. all weights set to 1), the curve should close if I repeat the first
two points as the last two points in the control point array.

However, the curve doesn't *quite* close, see screenshot below.  Is this
just the way the implementation is (i.e. not really good for closed curves)
or am I doing something wrong?

Here's the gcode, followed by the curve as seen in Axis.

G17
 G21
 G90
 G0
 T4 M6 G43 H1
 G0 X-48.646 Y16.467
 S22000
 (M3)
 G0 Z0
 G5.2 X-48.646 Y15.467 P1 L3
      X-58.989 Y7.625 P1
      X-62.16458728909492 Y -9.308334082365036 P1
      X-61.0000002682209 Y -25.264583319425583 P1
      X-10.91041243076324 Y -20.99583274126053 P1
      X-11.2333357930183  Y 2.5291672348976135 P1
      X-17.44374492764473 Y 16.291668206453323 P1
      X-48.646 Y15.467 P1
      X-58.989 Y7.625 P1
 G5.3
 M30




[image: Inline image 1]

<<inline: image.png>>

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