This is one of my most favourite projects I've ever made! It took me about 35 hours to design it , 80 hours to print it and a few more to test it out. Im running it now for hours and never had any problems or struggles with it. It looks really realistic. The whole sum of parts (3d printed, screws…) is about 250. You find all the g-codes in the files so you won't have to slice everything (because these are many parts) but I'll also upload all of the stl files. I recommend to use the g-codes I uploaded because there are so many parts to be printed. The g-codes include all of the parts! Only a few pieces needed to be printed with supports but i already included them in the g-codes. The parts are printed with an Ender 3 V2 with a layer height of 0,2mm and a speed of 25 mm/s (you can speed it up during printing if you want). The parts are easy to print, no difficulties.
It's powered by a lego technic powered up m motor and for steering I'm using a controller from Lego (8879) to slow it down a little bit. You can also use your own motor and your own steering. But I think lego is a cheaper and more convenient way to do it.
The T-Bars are mounted to a 1,5mm string which i glued together on the ends (avoid knots). To mount them you only have to clamp the string into the slot on the T-Bar. To make it holding just screw the M2 screw in. That part is shown in the pictures!
It's important, that all the stations and the struts are standing perfectly strait, otherwise the string would fall of the wheels! To get tension on the string i used some door stoppers. Use any weight you can find.
It's also important to put a small rubber ring around the wheel of the bottom station. This puts on more grip because the 3d printed surfaces are to slippy.
Filament: I used 3D Jake Eco PLA Dark Grey, Orange and White.
Parts you need for the bottom and the upper station + 3 ropeway struts:
1x 625 ZZ ball bearing
10x M2 x 5 (longer ones also work)
2x M2 x 10 (for every T-Bar, multiply it by the number of T-Bars you want!)
1x M2 Nut (for every T-Bar, multiply it by the number of T-Bars you want!)
11x M3 x 8
28x M3 x 12
18x M3 x 16
5x M3 x 20
12x M3 nuts
8x M4 x 12
16x M4 x 20
16x M4 Nuts
It's also possible to buy only 20mm M3 screws, 20mm M4 screws and 10mm M2 screws and cut them at the right lenght. That's easier for shopping but takes more time.
Lego Parts:
1x 4211433 (40 tooth gear)
1x 3647194 (8 tooth gear)
1x 8883 (m motor)
1x 87083 (axle 4)
1x 4211639 (axle 5)
2x 278026 (black pin)
20x 4211758 (wheels)
10x 4211655 (3 hole piece)
30x 4211807 (grey pin)
These parts (except of the motor) cost only few cents each. You can buy them on bricklink if you don't have them.
If want to use other wheels, for example 3d printed ones I uploaded the files with the ending V2. These ones have a 3,5mm hole instead of the hole for the lego technic pin for the beam (4211655). You just have to design wheels jo like and you're ready to go.
I hope you like it!
Have fun printing, building and running it!
Update 12.10.2022:
I uploaded a driving video (about 50 seconds) so you can watch it before you decide if you print it. You find the video in the zip file (unlucky printables doesn't “accept” videos) named Driving_video which is in the files where you also find the assembly.
Update 18.10.2022:
Added a new version of the clamp for the T-Bars, they're driving now even smoother over the reels. The file is called SL_7_V2 and the Gcode: clamp_V2_0_59
The author marked this model as their own original creation.