How to Model Roller Coasters from No Limits in Fusion 360

I've been working on a 3D printed roller coaster for the past year. In this video I explain my process of creating track. Keep in mind this is just how I do it, if you have a different way of doing it please let me know in the comments!
4.572 Number Explanation:
In the video I can't remember how I came up with that 4.572 number. But I think I figured it out. When you first import in the track splines, Fusion 360 reads the numbers you set in the extractor program as millimeters. So when you set the left, right, and bottom splines to 4.572, Fusion is going to put them 4.572mm away from the center spline. However, for the number you put into the No Limits spline export which determines the distance between points (0.39m in the video). Fusion reads that number as 3.9 mm for whatever reason. Because of this discrepancy in how Fusion reads the two numbers, it can cause weird scaling if set up improperly. With the verification method using SketchUp, a bunch of trial and error, and a bit of math, this shouldn't be too much of a hurdle if you want to change your track gauge and/or scale. But hopefully this helps clear some things! As I said the Spline extractor program has always worked a bit strange for me and you might not have these problems.
Link to Spline Extractor Program: github.com/Tello3/NL2SplineTr...
00:00 Importing spline points into Fusion
09:49 Modeling track spline in Fusion
24:24 Modeling cross tie
30:46 Modeling spline and cross tie as one
32:23 Modeling supports
40:17 Verifying the Fusion model is accurate to No Limits
48:04 Cinematics

[@Tello3]

Hey, im the one who made the Spline Extractor programm. The Scaling issue seems to be because of foot to meter conversion, since the conversion is 1 Meter ~ 3.28 Foot relatively close to the scaling you needed to apply. The distances to center were in mm on the version you had, so it actually gave you the correct distances between splines you specified. I only designed the programm to accomodate metric parameters, so you may need to do the conversions yourself.
Also the version you were using was an outdated version, which had issues with scaling that have been fixed in the next version. I just retestet it and it worked fine for me.

[@jonathanzang5612]

Ahhhh, makes sense. I’ll make sure to update my version. Thanks for creating the program, it makes spline exporting so much easier!

[@Tiggs_]

Thanks so much, all the other videos dont show how to model it, this is really helpful

[@jonathanzang5612]

Thank you, glad it helps!

[@l0wh1n]

This might potentially be the most useful video ever produced on the subject! Well done on this.
(P.S: Do you use the free version of Fusion, or the paid version?)

[@jonathanzang5612]

Thanks! I use an educational license of Fusion I get for free with my university.

[@Svennos_]

Hi, nice video, When i try and sweep my spline across the line i get an error it says my profile is overlapping and is to circular? do you know how to fix this?

[@Tello3]

Hey the version 1.1.1 of the Spline Extractor program has indeed had some bugs with scaling. Please make sure to get the v1.2.1 or newer, because those issues should've been adressed in those versions.

[@ConceptualCoasters]

hey! im looking to do this with a full circuit coaster but im struggling to figure out how to open the spline extractor program - it downloaded as just a file with no way to open any actual program. could you offer some help to me? thanks!

[@Tello3]

It should be a zip with an executable(.exe) inside (so it only works on windows). You need to make sure though that you dont download the source code

[@Tiggs_]

Also, could you please do a video explaining how to design the cart? unless you ahve already done it

[@jonathanzang5612]

The cart design is much more complex to the point where I don't know if a tutorial would be that helpful. Trying to get the wheel assemblies to work is the hardest part, and requires a ton of trial and error to work out the tolerances and wheel gaps. The actually modeling of the parts are easy, if you can model track you should be able to do it without any issues. For the actual design I would base it off real life coasters. There's a coaster printing discord I could send you, there's a ton of helpful people in it that could help you with the process.

[@Bjorn_the_coasterthoosie]

How do you connect the supports to the track? Do you use screws or print the supports with the track?

[@jonathanzang5612]

I print the supports separately then pin them to the track using 3mm dowel pins.

[@rollercoastercontentgc4488]

quick question, where do you get your tubing for the rails at?

[@jonathanzang5612]

tailonz.com/product/tailonz-pneumatic-blue-pu-air-tubing-pipe-hose-pu-air-hose-for-air-line-tubing-or-fluid-transfer-tubingcopy1671688695319

[@jonathanzang5612]

This is what I found works best. I’m using the 4mm OD, 2.5mm ID tubing. I use a 3D printed jig to cut the slit into it.

[@rollercoastercontentgc4488]

thx@@jonathanzang5612

[@ejector_seat]

Stl file please????? I don't have that much skill to do this