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Non continuous curve projection sweep

Question asked by David Kriesberg on Aug 16, 2017
Latest reply on Aug 18, 2017 by David Kriesberg

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Hi everyone,

I have projected a curve on to a cylindrical surface. This curve is to interact with a spherical ball, like a ball socket. However, when I try to mate the two to animate, the projected sweep is broken up into sections. Therefore, I don't have a continuous circular path and I am unable to animate a complete revolution.

I would appreciate any help on the matter.

Regards

Mark Peterson Aug 17, 2017 6:12 PM

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I agree. You need to setup the file for a Path mate. Here are the steps:

Create a new 3D sketch in the "disk" part and use "convert entities" to copy Curve1.
Show the sketch used to create "Revolve1" in the magnetic ball part
In the assembly create a new "Path" mate:
- Select the point in the ball sketch at the center of the ball
- Use the Selection Manager to select the loop of the new 3D sketch
Animate

Here's my assembly: Dropbox - demo_peterson.zip

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16 Replies

Kevin Pymm Aug 16, 2017 11:42 AM
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David,

Have you tried editing the projected curve & adding a "Fit Spline" command to it?
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- David Kriesberg @ Kevin Pymm on Aug 16, 2017 11:59 AM
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  Kevin,
  
  Thanks for the quick response. I was able to do the Fir Spline, however, it now doesn't allow me to do the sweep cut.
  I am using the circular path.
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  - Mark Peterson @ David Kriesberg on Aug 16, 2017 12:02 PM
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    Would you post a screenshot of the error or sample file?
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David Kriesberg Aug 16, 2017 12:23 PM
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I was able to generate the sweep.
However, it is still in sections. I am attaching a sample.
The goal is to have it as a continuous path so that I can mate and animate.
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- Craig Schultz @ David Kriesberg on Aug 16, 2017 4:43 PM
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  You can attempt to extrude the fit spine as a surface. Then mate the origin of the ball to the surface.
  
  I have done this for a cam pin on a track made up of a fit spline.
  
  If you could attach the part, I might be able to help.
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- Paul Salvador @ David Kriesberg on Aug 16, 2017 11:30 PM
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  David,.. it should work with the fitspline.. although, I personally think the ball should following the centerline or mid iso line from the sweep cut.
  Attachments
  - cam-csx.zip1.3 MB
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David Kriesberg Aug 17, 2017 4:01 PM
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Hi everyone thanks for the immense help.
I am uploading a demo of the part.
I am unable to do a path mate on the projected curve, not sure why.
The idea is that the ball socket should go around the groove smoothly.
Also, I've noticed that the 2 curves are not opposite to one another. I've done the math but they still dont line up.
demo.SLDASM - Google Drive
Mark Peterson
Craig Schultz
Paul Salvador
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- Paul Salvador @ David Kriesberg on Aug 17, 2017 4:14 PM
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  ok,.. so, what is this new file you posted?
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  - David Kriesberg @ Paul Salvador on Aug 17, 2017 5:21 PM
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    yes, the other one was another demo. This is a very close replica of what i need.
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    - David Kriesberg @ David Kriesberg on Aug 17, 2017 5:21 PM
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      Magnetic ball shaft.SLDPRT - Google Drive
      Disk_demo.SLDPRT - Google Drive
      Thank you in advance.
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      - Paul Salvador @ David Kriesberg on Aug 17, 2017 5:46 PM
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        ..well, again,.. mating the center of the ball (sketch1) to the path (curve1) is the easiest way to do it. (image attached)
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        Mark Peterson @ Paul Salvador on Aug 17, 2017 6:12 PM
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        I agree. You need to setup the file for a Path mate. Here are the steps:
        
        Create a new 3D sketch in the "disk" part and use "convert entities" to copy Curve1.
        Show the sketch used to create "Revolve1" in the magnetic ball part
        In the assembly create a new "Path" mate:
        Select the point in the ball sketch at the center of the ball
        Use the Selection Manager to select the loop of the new 3D sketch
        Animate
        
        Here's my assembly: Dropbox - demo_peterson.zip
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- Mark Peterson @ David Kriesberg on Aug 17, 2017 4:30 PM
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  I was only able to download the SLDASM file. I need the part files as well to take a look.
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David Kriesberg Aug 17, 2017 6:11 PM
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I have tried
This is what i see when I attempt it.
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- Paul Salvador @ David Kriesberg on Aug 17, 2017 6:35 PM
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  David,... just remove the disk.sldprt from the assembly and reinsert it. (imho, not worth finding out why/how/where/when..)
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David Kriesberg Aug 18, 2017 4:40 PM
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I just upgraded to 2017 - 2018 and it did the trick. Thanks everyone.
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