Newby Question

[Anonymous]

Probably first of many!
I extruded a u-channel as a surface. Three lines, one horizontal, two
vertical.
I then thickened it to create my part, both sides. I try to create a sketch
on any of the three inside surfaces. The sketch plane jumps to the outside
surface. OK, no problem I can create a work plane us two edges and use it
for my sketch. This works so I add another part starting with one of my new
work planes. Finish the part, further constraining it to the work planes.
I now edit a part feature, update the part, update the assembly. I now get
an error message telling me all of my constraint are trashed.
Obviously my problem started with the thickened surface, but what am I
missing? Shouldn't this approach have worked?
Ray

[Anonymous]

I seldomly use the thicken command, but it sounds like it should have
worked. If I was going to make a "U" channel, I would sketch the profile (8
lines, 4 vertical, 4 horizontal) then extrude.

"Ray Dyson" wrote in message
news:35D6EE5886255E43D19B69689C09F76B@in.WebX.maYIadrTaRb...
> Probably first of many!
> I extruded a u-channel as a surface. Three lines, one horizontal, two
> vertical.
> I then thickened it to create my part, both sides. I try to create a
sketch
> on any of the three inside surfaces. The sketch plane jumps to the outside
> surface. OK, no problem I can create a work plane us two edges and use it
> for my sketch. This works so I add another part starting with one of my
new
> work planes. Finish the part, further constraining it to the work planes.
> I now edit a part feature, update the part, update the assembly. I now get
> an error message telling me all of my constraint are trashed.
> Obviously my problem started with the thickened surface, but what am I
> missing? Shouldn't this approach have worked?
> Ray
>
>

[Anonymous]

Thickened mid surfs is the method I use for sheet metal frames, etc. in other
apps. I had the same experience trying to use it in IV. Bummer.

================


"Ray Dyson" wrote in message
news:35D6EE5886255E43D19B69689C09F76B@in.WebX.maYIadrTaRb...
> Probably first of many!
> I extruded a u-channel as a surface. Three lines, one horizontal, two
> vertical.
> I then thickened it to create my part, both sides. I try to create a sketch
> on any of the three inside surfaces. The sketch plane jumps to the outside
> surface. OK, no problem I can create a work plane us two edges and use it
> for my sketch. This works so I add another part starting with one of my new
> work planes. Finish the part, further constraining it to the work planes.
> I now edit a part feature, update the part, update the assembly. I now get
> an error message telling me all of my constraint are trashed.
> Obviously my problem started with the thickened surface, but what am I
> missing? Shouldn't this approach have worked?
> Ray
>
>

[Anonymous]

It only occurs when you use the bi-directional option during thicken. I
logged a defect against this.

Loren Jahraus
Autodesk Inventor Workflow Team

"Ray Dyson" wrote in message
news:35D6EE5886255E43D19B69689C09F76B@in.WebX.maYIadrTaRb...
> Probably first of many!
> I extruded a u-channel as a surface. Three lines, one horizontal, two
> vertical.
> I then thickened it to create my part, both sides. I try to create a
sketch
> on any of the three inside surfaces. The sketch plane jumps to the outside
> surface. OK, no problem I can create a work plane us two edges and use it
> for my sketch. This works so I add another part starting with one of my
new
> work planes. Finish the part, further constraining it to the work planes.
> I now edit a part feature, update the part, update the assembly. I now get
> an error message telling me all of my constraint are trashed.
> Obviously my problem started with the thickened surface, but what am I
> missing? Shouldn't this approach have worked?
> Ray
>
>

[Anonymous]

Thanks Loren and all!
Good to know it wasn't just me. And , yes I'd probably never use this for so
simple a part, just kicking tires.
Ray

"Loren Jahraus (Autodesk)" wrote in message
news:F1D6026E8BC159E24128E4FA714B53F9@in.WebX.maYIadrTaRb...
> It only occurs when you use the bi-directional option during thicken. I
> logged a defect against this.
>
> Loren Jahraus
> Autodesk Inventor Workflow Team
>
> "Ray Dyson" wrote in message
> news:35D6EE5886255E43D19B69689C09F76B@in.WebX.maYIadrTaRb...
> > Probably first of many!
> > I extruded a u-channel as a surface. Three lines, one horizontal, two
> > vertical.
> > I then thickened it to create my part, both sides. I try to create a
> sketch
> > on any of the three inside surfaces. The sketch plane jumps to the
outside
> > surface. OK, no problem I can create a work plane us two edges and use
it
> > for my sketch. This works so I add another part starting with one of my
> new
> > work planes. Finish the part, further constraining it to the work
planes.
> > I now edit a part feature, update the part, update the assembly. I now
get
> > an error message telling me all of my constraint are trashed.
> > Obviously my problem started with the thickened surface, but what am I
> > missing? Shouldn't this approach have worked?
> > Ray
> >
> >
>
>