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piano tangente

  • Thread starter Thread starter MARCOC
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MARCOC

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hello to all... I place an image. ..practically when I have a profile of revolution with more tangent or non tangent curves.. .does not make me create tangent plans to the profile...it only creates them if I have a single ball profile
Someone can tell me if it's a solidworks limit (which I don't think)... where am I wrong??? ? ?
1601885654297.webp
 
I did it yesterday with 2014 and it works, but obviously I improvised geometry.
attach your file
 
the problem is the toroidal shape that does not allow, it is not clear to me the reason, the creation of the plane with surface and plane.
in the annex you find various evidence and you see that:
the spherical form, that is, an arc that has the center on the axis of revolution, does not present problems, but does not allow to create a plan perpendicular to the selected one
the cylindrical shape does not even have problems if the center is not coincident to the axis of revolution, moreover it allows to create a parallel plane and perpendicular to the selected one.
the toroidal shape, that is an arc with the center not coincident with the axis of rotation, does not in any way allow to create a plane with surface and plane of reference. in this case you have to create a point on the sketch and create the plan through the point and the surface.

in the annex the first function (spherical) has a positioning quota of the center regarding the axis; this share has value 0 in order to create the ball, but just change it to 0.001 to transform geometry into toroidale and see the plan fail
 

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Bye to all,
the problem, I think it is geometric and not software.
to satisfy the conditions for which a plan is tangent to two or more surfaces normal to the surface must lie on the same plane (in fact a plan is defined only by its normal).
in the attached image you see the intersection curves of two floors, one (yellow) passing through the axis of revolution and the other (red) not passing through the axis. I then drew the intersection curves of the two floors, built a tangent line to these curves and intersection points between this line and the intersection curves.
it is seen that the two yellow carriers (normal to the surface in those points), lie on the same floor and then identify the tangent plan for the two points.
red carriers are also normal to the surface in their respective application points, but do not lie on the same floor and therefore do not identify a single tangent plane.
I hope I explained.
Hi.tangenza.webp
 
I don't understand much about my limits, but I assure you that the problem is even one corner.
in the attached file, which I do not know if you can see, there is a sphere that allows the realization of the tangent plane, but just move the curve center from the axis of revolution, thus getting a bull, and the realization of the plan fails.
to me it seems that the condition between first and second geometry is identical to the center of the arch. I'll attach an image later.
If you'll @marcoc I think it would be a good idea.
 
Massive and as you say... it only works if the arch has the center on the axis of revolution
even if it is a sphere... so I think the problem is related to a lack of control of solidworks
 
I did some evidence. It seems that for the ball the command behaves differently than the one for which it is thought, allowing to select a plan as a second reference. Also from the online guide it turns out that in the case of selection of a surface for the tangence the second constraint can be only a point near the surface.
inter alia for the sphere the only possible constraint on the plane is the parallel one.
 

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