Posted by DowniBri on Dec 14, 2018; 1:48am
URL: https://forum.librecad.org/polyline-creation-tp5716736p5716742.html

Thanks Dellus for your speedy responses.

Still struggling a bit.  I am not sure what you mean by "solve everything geometrically with CAD".  What command/tool would I use to position a circular arc to perfectly meet two elliptical arcs at a very specific desired point and then do the same thing in a mirror position at the other ends of the elliptical arcs.

I am getting this message in the command space:

Hatch failed due to a gap=9.39034e-05 between (44.2, 40.3266) and (44.2, 40.3267)
Invalid hatch area. Please check that the entities chosen form one or more closed contours.  When I did a trim2 operation at this point (meeting of right hand circular arc with outer elliptical arc) I did not get any feedback that nothing happened.

How close does my meeting have to be for the trim2 tool to work - the points are within 1/10000 of a millimetre.

Brian