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9th November 2014, 11:10 PM | #1 |
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Re: Going from AC3D to .stl
I am using an Afinia 3D Printer. I have the AC3D major grid set to 1.0 m and the minor grid set to 0.001 m (1mm). I export my projects from AC3D as STL ASCII. To have my AC3D projects print actual size I must scale them up 39.368 times on the Afinia.
3D Printer projects from Make magazine and other sources print actual size without scaling. Makes no sense to me. Any explanation? Blue side up, Bob |
30th November 2014, 12:36 AM | #2 | |
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Re: Going from AC3D to .stl
Quote:
I know that number of cm per meter divided by number of cm per inch equals 39.37. (100 / 2.54 = 39.37). However, if ac3d units are in meters and Afinia printer units are also metric why should the use of any imperial units be required at all? Blue side up, Bob |
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30th November 2014, 05:49 AM | #3 | |
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Re: Going from AC3D to .stl
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Best Edi |
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30th November 2014, 09:05 AM | #4 | |
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Re: Going from AC3D to .stl
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I have used AC3D for 3D cockpit development in X-Plane for a number of years... always metric units. I've not run into any need for scaling up by 39.37. I've found AC3D intuitive and easy to use. I recently used AC3D's Revolve function for 3D printing a 2 cm dia, 5 threads/cm nut and bolt. Blue side up, Bob |
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16th May 2018, 04:23 PM | #5 | |
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Re: Going from AC3D to .stl
Quote:
I made a model for something I wanted to 3D print as usual using meters and it came out way too small. The key I think is the scaling in AC3D acts like a percentage or it has to do with microns. Any how this does work. Take 39.37 and multiply by 100 to get 3937. Put 3937 in your scaling xyz hit scale and viola! Now when you export your model to .STL it should be the correct size. It works! I have verified this by scaling up a model and uploading it to Sculpteo. Last edited by jonbourg; 16th May 2018 at 04:40 PM. |
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16th May 2018, 05:37 PM | #6 | |
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Re: Going from AC3D to .stl
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Coincidence, I received a letter this very morning from a fellow who is using one of my AC3D exported .stl files for 3D printing 3 1/8" instrument bezels. He is saying that he needs to scale up by a factor of 1000. ?? (When using AC3D i convert all Imperial lengths to mm.) Every thing I produce in AC3D and export as .stl needs to be scaled by a factor of 39.37 on my Afinia printer. (39.3701 is the number of inches in a meter) So, it looks like there are differences in 3D printers and perhaps also differences in AC3D settings. Recently I have been using SketchUp for my 3D Printing development work. SketchUp .stl's print correctly without scaling. Blue side up, Bob |
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16th May 2018, 06:45 PM | #7 |
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Re: Going from AC3D to .stl
Oh yeah there is definitely a difference depending on what scale you start off with. With aircraft meters is what is used for Flightgear. If you start off with mm than yup the factor will be different!
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.stl, 3d printing |
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