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Swept cut problem: Path on an angled plane, I want to rotate but not twist the profile

Question asked by Max Crittenden on Jan 21, 2016
Latest reply on Jan 21, 2016 by Anthony Sarrazin

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I'm mounting a component of hardware on an angled base. I want the angled top of the base to match the component's footprint, but I want to draft the base outward so that its bottom is wider than its top. I thought I could do this with a path sketch on the angled top surface and a sketched trapezoid as the cutting profile. When I sweep the profile around the path, I want it to rotate to follow the path, but not twist (In other words, it should remain perpendicular to the Top Plane as it travels along the path). I don't see any settings that will let me do this. Is there a way?

The part is enclosed. Sketch 19 is the path, Sketch 20 is the profile. Any ideas? Thanks all.

Sarah Dwight Jan 21, 2016 4:32 PM

Correct Answer

Have you tried a direction vector in options?

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angled base temp.SLDPRT.zip165.4 KB

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Jeremiah Feist Jan 21, 2016 4:10 PM

I am not sure what you are after, but I did this with a swept surface. is this close to the shape you want?

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Max Crittenden @ Jeremiah Feist on Jan 21, 2016 4:31 PM

No, it looks like you're creating a draft or taper relative to the top surface. On my part, the bottom surface will be horizontal, the top surface is angled, and any draft will be relative to the bottom (i.e. 10 degrees or so off vertical).

In other words, in an end view the base should look like the attached sketch. And that 10 degree slope should follow the footprint of my purchased part all the way around.

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draft illustration.jpg18.9 KB

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Anthony Sarrazin Jan 21, 2016 4:31 PM

is this closer to what you looking for?

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Max Crittenden @ Anthony Sarrazin on Jan 21, 2016 4:32 PM

Yes, that's it! How did you do it?

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Anthony Sarrazin @ Max Crittenden on Jan 21, 2016 4:41 PM

extruded a body from your sketch to create a new body (unchecked merge entities), drafted the extrude 10°, then used direct editing's combine tool to create one body from the two using the common option.

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Max Crittenden @ Anthony Sarrazin on Jan 21, 2016 4:52 PM

In that case, it sounds like it's not quite right. If you extrude with draft from a sketch, isn't the draft always uniform relative to the sketch plane? In other words, is there a way to draft relative to some other plane than the sketch plane?

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Jeremiah Feist @ Max Crittenden on Jan 21, 2016 5:04 PM

You can set the direction of an extrude with this box in the property manager. and the draft applied in the feature is relative to that direction.

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Max Crittenden @ Jeremiah Feist on Jan 21, 2016 5:22 PM

Well, knock me over with a spoon. 17 years using Solidworks, and I never knew you could choose the direction of an extrude.

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Anthony Sarrazin @ Max Crittenden on Jan 22, 2016 7:53 AM

You are right our geometry is close but not quite what you were looking for, I had thought the face you were referring to was the base. Yes you can by changing your your neutral plane within the draft feature, but this will not give you the required geometry you were looking for I believe.

Looks like Sarah grabbed this one.

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Sarah Dwight Jan 21, 2016 4:32 PM

Have you tried a direction vector in options?

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Max Crittenden @ Sarah Dwight on Jan 21, 2016 4:40 PM

That seems to do it, thanks! I have to say "Path alignment type: Direction Vector" doesn't exactly shout out as the obvious solution.

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Sarah Dwight @ Max Crittenden on Jan 21, 2016 4:42 PM

I only knew about it from a recent post I messed around with. I actually had to go look it up in order to remember how to do it again!

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12 Replies

Jeremiah Feist Jan 21, 2016 4:10 PM
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Correct Answer
I am not sure what you are after, but I did this with a swept surface. is this close to the shape you want?
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- Max Crittenden @ Jeremiah Feist on Jan 21, 2016 4:31 PM
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  No, it looks like you're creating a draft or taper relative to the top surface. On my part, the bottom surface will be horizontal, the top surface is angled, and any draft will be relative to the bottom (i.e. 10 degrees or so off vertical).
  
  In other words, in an end view the base should look like the attached sketch. And that 10 degree slope should follow the footprint of my purchased part all the way around.
  Attachments
  - draft illustration.jpg18.9 KB
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Anthony Sarrazin Jan 21, 2016 4:31 PM
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is this closer to what you looking for?
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- Max Crittenden @ Anthony Sarrazin on Jan 21, 2016 4:32 PM
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  Yes, that's it! How did you do it?
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  - Anthony Sarrazin @ Max Crittenden on Jan 21, 2016 4:41 PM
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    extruded a body from your sketch to create a new body (unchecked merge entities), drafted the extrude 10°, then used direct editing's combine tool to create one body from the two using the common option.
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    - Max Crittenden @ Anthony Sarrazin on Jan 21, 2016 4:52 PM
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      In that case, it sounds like it's not quite right. If you extrude with draft from a sketch, isn't the draft always uniform relative to the sketch plane? In other words, is there a way to draft relative to some other plane than the sketch plane?
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      - Jeremiah Feist @ Max Crittenden on Jan 21, 2016 5:04 PM
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        You can set the direction of an extrude with this box in the property manager. and the draft applied in the feature is relative to that direction.
        
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        Max Crittenden @ Jeremiah Feist on Jan 21, 2016 5:22 PM
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        Well, knock me over with a spoon. 17 years using Solidworks, and I never knew you could choose the direction of an extrude.
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      - Anthony Sarrazin @ Max Crittenden on Jan 22, 2016 7:53 AM
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        You are right our geometry is close but not quite what you were looking for, I had thought the face you were referring to was the base. Yes you can by changing your your neutral plane within the draft feature, but this will not give you the required geometry you were looking for I believe.
        
        Looks like Sarah grabbed this one.
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Sarah Dwight Jan 21, 2016 4:32 PM
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Have you tried a direction vector in options?
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- Max Crittenden @ Sarah Dwight on Jan 21, 2016 4:40 PM
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  That seems to do it, thanks! I have to say "Path alignment type: Direction Vector" doesn't exactly shout out as the obvious solution.
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  - Sarah Dwight @ Max Crittenden on Jan 21, 2016 4:42 PM
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    I only knew about it from a recent post I messed around with. I actually had to go look it up in order to remember how to do it again!
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Swept cut problem: Path on an angled plane, I want to rotate but not twist the profile

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