<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yiv1037186667"><div id="yui_3_16_0_ym19_1_1510946625511_16345"><div style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_ym19_1_1510946625511_16344"><div id="yiv1037186667"><div id="yiv1037186667yui_3_16_0_ym19_1_1510922478583_3061"><div style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yiv1037186667yui_3_16_0_ym19_1_1510922478583_3060"><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676">Dear all,</div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676"><br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">I'm having a problem with wire extrusion. I have prepared an example to explain this (see attachment).</div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr"><br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">The script builds an extruded coil by using a spline (like pipe.geo example).</div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr"><br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">Using default parameters and changing only the number of turns this is what happens:</div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr"><br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">If you set the number of turns to one or two, the mesh seems ok.</div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr"><br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">However if you increase the number of turns, for example, to 10 you get a strange behavior at the end of the extrusion (see attached picture) and, when meshing, the following error occurs (see attached full log and mesh picture)</div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr"><br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">Error : Self intersecting surface mesh, computing intersections (this could take a while)<br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">Info : 8 intersecting faces have been saved into 'intersect.pos'<br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">Error : Could not open file 'intersect.pos'<br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">Warning : Volume 1 consists of no elements<br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">Info : Done meshing 3D (0.613586 s)<br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr">Info : 1883 vertices 3676 elements</div><div dir="ltr" id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_7472"><br></div><div dir="ltr" id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_7472">Any help on this is much appreciated,</div><div dir="ltr" id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_7472"><br></div><div dir="ltr" id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_7472">Regards,</div><div dir="ltr" id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_7472"><br></div><div dir="ltr" id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_7472">Marco</div><div dir="ltr" id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_7472"><br></div><div dir="ltr" id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_7472"><br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr"><br></div><div id="yiv1037186667yui_3_16_0_ym19_1_1510837374507_3676" dir="ltr"><br></div></div></div></div></div></div></div></div></body></html>