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CADfuzed - 4/8/2022 6:10:44 PM
   
Taking a surface from a Solid

I've done something, PRECISELY what I wanted to do, and now i cannot repete the task. (YES, I DID turn the computer on)

I created an extruded pyramid off of a 10.5X 8.2" X .5" radiused rectangle, (making an air filter plenum)  with a height of 8.375" and an inward taper of 28 degrees. I proceeded to intersect a 4" solid tube into the top of the pyramid, ectending about 6". I then used the TRIM SOLID TO SOLID function and moved the pieces aside. From there I SHELLED the model to .064" leaving me with a thin walled pyrimid. 

 

This is where I did something that I cannot remember or recreate. I somehow managed to extract as a FACE, all of the surfaces. The surface model has NO mass (as demonstrated by this VERIFY>MASS PROPERTIES readout:

Volume: 0.000000 IN^3

Mass: 0.000000 LB
Surface Mass: 144.069017 LB
Surface Area: 144.069017 IN^2
Center of Mass:
X = 30.855895, Y = -0.015546, Z = -0.595261
Moments of Inertia (LB-IN^2):
Ixx = 1194.260362, Iyy = 1768.100335, Izz = 2330.047435
Products of Inertia (LB-IN^2):
Ixy = 0.000000, Iyz = 0.000000, Ixz = 0.000035
Angular Momentum (LB-IN^2/sec):
Hx = 0.000000, Hy = 0.000000, Hz = 0.000000
Radius of Gyration (IN):
Rx = 2.879149, Ry = 3.503226, Rz = 4.021583
Kinetic Energy: 0.000000 LB-IN^2/sec^2
Principal Axes and Moments (LB-IN^2):
X = 0.000000, Y = 1.000000, Z = 0.000000 1768.100335
X = 0.000000, Y = -0.000000, Z = 1.000000 2330.047435

X = 1.000000, Y = -0.000000, Z = -0.000000 -1.#QNAN0

 

I used this creation (I still have it in the file) to make a flat pattern for fabrication, BREAKing it from the top into two equal parts and using the UNFOLD command to creat the flat pattern. 

I was moving along swimmingly as the Brits would say, creating a LAYOUT file and sending it to the fabricator for manufacture. But NOW that I want to recreate this 'surface extraction" on other parts I am not able to recreate the process. I am using the MODIFY>TOPOLOGY>UNSTICH>FACES OF SOLIDS/SHEET BODIES.>COPY and UNHOOK options and all I can get when I attempt to XFORM DYNAMIC MOVE, is another copy of the model. 

Am I not holding my mouth right or WHAT?

Any help here would be approciated.

 

Thanks, 

CADfused


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CADfuzed - 4/8/2022 6:21:52 PM
   
RE:Taking a surface from a Solid

Here is a file copy of what I did 

 

CADfused


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jason@cadcamadvantageinc.com - 4/10/2022 8:45:07 PM
   
RE:Taking a surface from a Solid
While I don't see a copy of anything in your post, I did try and duplicate this according to your description. All I can say is, it did work fo me. NOT what you wanted to hear I'm sure. One thought I had, are you SURE your using dynamic MOVE and not dynamic COPY??

just my 2 cents so far.

- Jason
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michael@gutmandesign.com - 4/11/2022 11:21:54 AM
   
RE:Taking a surface from a Solid
Hi Cadfuzed,

Hope all is well.

I do not mean to second guess you but it seems as though you are preparing your part(s) for laser cutting.

If so, you could flatten the shelled sold.  Explode it so it becomes line segments. Then erase from the side view all of the lines below the top profile.  Export this profile as a DXF file.

Your fabricator most likely can use this file directly to program fhis laser cutter.  
Note: set your profile to be visible in "top" view for uniform resul;ts.

Hope this helps!

Mike

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CADfuzed - 4/11/2022 4:04:25 PM
   
RE:Taking a surface from a Solid

Thanks for the response Mike. I DID this initially by taking line segments from the model and 'estimating' the curved lenght of each long radius and adding it to the side of one of the flat segments. I got SOMETHING of an acceptable response but when I folded it back up the intersection of the pyrimid model and the round tube at the top was not what would inspirre confidence. Gaps did appear. 

 

I am interested in your approach to 

 


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CADfuzed - 4/11/2022 4:07:20 PM
   
RE:Taking a surface from a Solid

I am interested in your approach to ...flattening the model. to get a flat image. How do you do that? 

 

 


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CADfuzed - 4/11/2022 4:09:35 PM
   
RE:Taking a surface from a Solid

<p> <span style="color: rgb(51, 51, 51); font-family: azo-sans-web, sans-serif; font-size: 18px; background-color: rgb(241, 241, 241);">I am interested in your approach to ...flattening the model. to get a flat image. How do you do that?&nbsp;</span></p> <p> &nbsp;</p> <p> &nbsp;</p>

I HOPE this file upload works, this is the pyramid I was talking about. 

 

CADfused


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CADfuzed - 4/11/2022 4:21:36 PM
   
RE:Taking a surface from a Solid

Apparently I do not know how to attach CKD files to this board. Anyone help on this? I have checked the Attach files(s) box and opened the file but I cannot get it into the post. 

 

CADfused


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CADfuzed - 4/11/2022 4:35:06 PM
   
RE:Taking a surface from a Solid
<font color="#333333" face="azo-sans-web, sans-serif"><span style="font-size: 18px; background-color: rgb(241, 241, 241);">&nbsp;</span></font>

CADfused

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michael@gutmandesign.com - 4/13/2022 3:58:30 PM
   
RE:Taking a surface from a Solid
Cadfuzed,

Sent you email.  If you didn't get then reply to michael@gutmandesign.com.

Mike

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