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Offset Function in Sketch Mode

Imagine I sketch a feature as reference geometry and I fully constrain it. Now, say that geometry represented the shape of something entering the part. In the part I wish to make the cut out shape which it enters just a smidge larger. The obvious tool is the offset command. However, when you offset sketch none of the constraints come over to the offset feature. At that point you must re-constrain all the geometry without moving it...It becomes quite the challenge.

Any work around to this that I'm missing?

Alibre Atom3D
Version: V25 64-bit [Build 25037]
 
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Ken226

Alibre Super User
Imagine I sketch a feature as reference geometry and I fully constrain it. Now, say that geometry represented the shape of something entering the part. In the part I wish to make the cut out shape which it enters just a smidge larger. The obvious tool is the offset command. However, when you offset sketch none of the constraints come over to the offset feature. At that point you must re-constrain all the geometry without moving it...It becomes quite the challenge.

Any work around to this that I'm missing?

Alibre Atom3D
Version: V25 64-bit [Build 25037]

Not that I'm aware of.

It's an annoyance when you want the offset figures to be constrained.

But, on the occasions where I need the offset figures to be unconstrained, it would be an annoyance if they were.

Now, a checkbox in the offset dialogue allowing the user to "maintain constraints", would be great!
 

NateLiqGrav

Alibre Super User
Does Atom3D have thin wall cut? If so then first do a regular cut using the sketch actual size. Then do a projection (or a copy) of that sketch. Next do a thin wall cut and set the cut "wall" to be your desired offset.

[edit]
Sorry, after searching I found that Atom3D does not have thin wall cuts.
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In this particular instance the sketch's were a part of a loft feature, so a thin wall cut doesn't seem to be a workaround (even if it Atom3D did have it).
 

jfleming

Alibre Super User
Imagine I sketch a feature as reference geometry and I fully constrain it. Now, say that geometry represented the shape of something entering the part. In the part I wish to make the cut out shape which it enters just a smidge larger. The obvious tool is the offset command. However, when you offset sketch none of the constraints come over to the offset feature. At that point you must re-constrain all the geometry without moving it...It becomes quite the challenge.

Any work around to this that I'm missing?

Alibre Atom3D
Version: V25 64-bit [Build 25037]

I run into this all the time. It is a shame the offset figures must be entirely re-constrained.
 
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