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PostPosted: January 23, 2012, 12:03 am 
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foxk56 wrote:
For anybody else that wants the CAD models of the Miata spindles I created, please visit this thread which will direct you to my CAD wiki website. And while you're there, if you have some of your own CAD models to share, post them up or email them to me to post: viewtopic.php?f=26&t=11083

The spindle models on the wiki are in .STEP format so as to be a universal download for people, but if anybody has Solidworks 2010 you can still email me to ask for the SW files if you want those instead.


I do my 3D work for printing, which means all of my files are in stl format. Don't happen to know of any stl to STEP conversion tools do you? Spent today working on making a 3D printable replacement for my rusted out mustang II spindles, and would not mind sharing.


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PostPosted: January 23, 2012, 12:37 am 
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Downix wrote:
I do my 3D work for printing, which means all of my files are in stl format. Don't happen to know of any stl to STEP conversion tools do you? Spent today working on making a 3D printable replacement for my rusted out mustang II spindles, and would not mind sharing.
STL to STEP is tricky. STL format is in triangles and polygons, and STEP will define curves and circles with math and it's difficult to recreate a circle from polygons. What program are you using to draw the parts? I presume you originally drew the part with circles. If the original geometry isn't lost, do you have the option to re-save as IGES? That's another widely used data-exchange format. It defines surfaces, but it's just a hop and a skip from there to a STEP.


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PostPosted: January 23, 2012, 1:14 am 
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mattrogers wrote:
Downix wrote:
I do my 3D work for printing, which means all of my files are in stl format. Don't happen to know of any stl to STEP conversion tools do you? Spent today working on making a 3D printable replacement for my rusted out mustang II spindles, and would not mind sharing.
STL to STEP is tricky. STL format is in triangles and polygons, and STEP will define curves and circles with math and it's difficult to recreate a circle from polygons. What program are you using to draw the parts? I presume you originally drew the part with circles. If the original geometry isn't lost, do you have the option to re-save as IGES? That's another widely used data-exchange format. It defines surfaces, but it's just a hop and a skip from there to a STEP.

I'm using OpenSCAD, which has limited exporting options. namely STL and OFF (and DXF for 2D support).


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PostPosted: January 24, 2012, 12:58 pm 
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Ok, found a few conversion tools. Is there anyone here who would be willing to take a look and be sure it is viewable.


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PostPosted: January 24, 2012, 6:19 pm 
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I'll PM you my email address. I'll take a look.


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PostPosted: January 25, 2012, 2:33 am 
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They're on their way. Let me know.


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PostPosted: January 25, 2012, 1:41 pm 
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I work with Pro/E wildfire every day, I can probably import an STL and export it as STEP, or PRT, or IGES or whatever.

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PostPosted: February 3, 2012, 3:06 am 
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Some nice simply uprights easy to make that I noticed the other day (don't know the origins) ..


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PostPosted: February 8, 2012, 1:34 pm 
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After messing with FreeCAD for import/export, it dawned on me that FreeCAD's root language is similar to OpenSCAD, and I could manually convert the file and export to STEP that way, so working on that now.

Of course I scored a set of Chevy truck spindles, not certain how they compare as of yet.


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PostPosted: February 9, 2012, 12:02 am 
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Here are some comparision photos: Alford & Alder/Triumph trunnion vertical links versus Canley Classics trunnionless vertical links versus Miata uprights.


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Trunnion vs Trunnionless Vertical Links_Front.jpg
Trunnion vs Trunnionless Vertical Links_Front.jpg [ 160.16 KiB | Viewed 2642 times ]
Trunnion vs Trunnionless Vertical Links_Rear.jpg
Trunnion vs Trunnionless Vertical Links_Rear.jpg [ 158.43 KiB | Viewed 2642 times ]
Spitfire vs Miata_Rear.jpg
Spitfire vs Miata_Rear.jpg [ 139.69 KiB | Viewed 2642 times ]

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PostPosted: February 11, 2012, 10:00 am 
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skou wrote:
Here are some comparision photos: Alford & Alder/Triumph trunnion vertical links versus Canley Classics trunnionless vertical links versus Miata uprights.

do you have a dimension top to bottom for the trunionless upright?
Fred V

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PostPosted: February 14, 2012, 12:08 am 
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9-1/16"


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PostPosted: February 14, 2012, 10:27 am 
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thanks Steve,
i have this drawing that shows it to be 9.88". yours looks to be 8.625". i wonder what the difference is. i'm building a Morgan replica 3 wheeler but so many of the same technical issues apply to both. i may have to fab my own upright to get the height i need.
thanks,
Fred V


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Herald-Vitesse-Spitfire Uprights.jpg
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PostPosted: February 14, 2012, 10:36 am 
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looked at it again and see that yours is 9 1/16".
Fred V

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PostPosted: March 5, 2012, 1:04 pm 
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Does anyone know or can someone measure the angle of the boss for the bottom BJ on a Miata front upright?

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