swept surface not showing up

Guys,

I am making a simple cable assembly, a atraight piece of wire between two connectors. I don't want to use ProCable for this, so though I would use a solid pipe feature. Trouble is the pipe only shows up as a centre line, no surfaces displayed.

I have my Environment set to show Thick Cables.

So then I tried it as a swept surface. I created a straight datum curve between two points. Then tried to create the sweep. It wouldn't let me select the curve as a valid trajectory. I guessed it was because it was a single segment curve, so I recreated the datum curve as a sketched curve with two straight segments. This time the Sweep was happy with the trajectory - go figure! Trouble is, the surfaces still don't show up!

Finally, I created an circular extruded surface between the connectors, and this time the surfaces did show up. Phew.

But what is wrong that sweeps and pipes don't show? If I create cables using ProCable they show up fine.

Dave

Reply to
dakeb
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"dakeb" wrote in message news:bnal3v$6gp$ snipped-for-privacy@rdel.co.uk... : Guys, : : I am making a simple cable assembly, a atraight piece of wire between two : connectors. I don't want to use ProCable for this, so though I would use a : solid pipe feature. Trouble is the pipe only shows up as a centre line, no : surfaces displayed.

This question of substitutes for their routed systems packages has come up a few times. One of the last times, someone pointed out 'Insert>Advanced>Pipe' as a way to create pipes without first creating a curve trajectory 'thru points'. It is pretty handy: just create a bunch of points, actually, one at each place you want the pipe feature to change direction, then select them to create the pipe. But, as you point out, Dave, sometimes you don't get geometry. It seems like you created your pipe in assembly mode. You might have noticed that there was no menu reference to geometry. Now try creating the pipe in part mode. Besides prompting you for values for diameter and wall thickness, it gives you a menu selection for geometry. Geometry in part mode, no geometry in assembly mode (but parametric info does show up in a drawing). Oh, yeah, and I thought it might be a neat thing to have in sheetmetal to run some tubing around the outside of a housing: NO pipe feature in sheetmetal. : : I have my Environment set to show Thick Cables. : : So then I tried it as a swept surface. I created a straight datum curve : between two points. Then tried to create the sweep. It wouldn't let me : select the curve as a valid trajectory. I guessed it was because it was a : single segment curve, so I recreated the datum curve as a sketched curve : with two straight segments. This time the Sweep was happy with the : trajectory - go figure! Trouble is, the surfaces still don't show up! : Seems to me I remember the surface collapsing (but oddly, not failing) if the corner radius was too small.

: Finally, I created an circular extruded surface between the connectors, and : this time the surfaces did show up. Phew. : : But what is wrong that sweeps and pipes don't show?

I don't think it's one thing that's wrong. You have your choice of partial solutions outside of routed systems and they don't want to make them too good or you won't have to spend another couple quid on the good stuff.

David Janes

Reply to
David Janes

We have the routed application, but I don't want to use it for a simple point to point straight cable. Why? Because it means I have to create lots of extraneous files to be stored in I-link that won't have proper part numbers. And it will take longer. So we have the 'good stuff' already. I wan't a simple solution to a simple problem.

It looks like 3D swept surfaces cannot be created in an assembly. I know I can create a 2D swept surface, because it works for a sketched curve. Why does ProE let you attempt to create 3D sweeps if it can't display them? Why can't ProE display 3d sweeps in an assy? What other types of surface are useless in an assy that ProE lets you create but not display? When is ProE going to allow 3D solid features in an assy? I really don't want to store part files of assy features.

And another gripe! When is PTC going to allow us to measure the length of a trajectory created as a sketch during feature creation?

Reply to
dakeb

I think that TPI 107029 "Thru point curves that can be used as a trajectory for sweep" tries to explain this. (TPI 21286 also relates to the subject.) If you specify a tangency condition or tweak and induce a curvature to a free curve without pulling it out of a plane it will be a valid trajectory. The limitation seems to be because there is no plane or surface associated with it and the curve itself doesn't present a possible solution for a section orientation vector. It's trying to establish a planar reference and three arbitrary points on a line won't do that.

A variable section sweep isn't hampered by this; you are given the opportunity to specify a direction reference.

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Shouldn't be a problem aside from the above limitation, part or assy.

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Have no idea why the the surf isn't showing. Can you duplicate it?

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Reply to
Jeff Howard

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