 Joined: 26/05/2021(UTC) Posts: 198 Location: Australia, East Maitland, NSW
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Here's a prototype road grade crossing for compact layouts or in older rural and industrial areas where the large Marklin item would be problematic or out of place. Also an issue if the way your scenery is set out requires the road to cross the rail lines on a curve - so versions for R1, R2 are also in the mill. Held in place by C-track screws underneath the white guide posts for Volvo drivers. The bits between the rails are glued in place. Sorry, the parts were all painted separately as they came off the printer - not in batch like they would be in a final product.   Having knocked this one up I can see a few improvements to be made - but it may be some time before I can back to this project. Here's the zipped stl files. 3D design on TinkerCAD - user revmox.  Marklin GC Posts.zip (9kb) downloaded 21 time(s). Straight Plate 6.zip (6kb) downloaded 20 time(s). Marklin GC Ramp Flip.zip (16kb) downloaded 20 time(s). Straight Track Panel.zip (1kb) downloaded 17 time(s).Note to anyone printing the files - some parts are printed upside down to avoid having to use supports. Set top and bottom infill to 0 or 90 degrees to get a much better appearance than the default 45 degrees.
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 8 users liked this useful post by revmox
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 Joined: 30/01/2006(UTC) Posts: 1,893 Location: Keene, NH
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5 users liked this useful post by mmervine
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Joined: 26/05/2021(UTC) Posts: 198 Location: Australia, East Maitland, NSW
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Thanks mmervine.
Yes, without special sections of track the height of the regular pukos is a problem for any home-grown crossing solution and those would help a lot.
My end targets are crossings for R1 and R2 curves (when I work out how to do a large radius arc in the TinkerCAD program) but I haven't seen any commercial products that suit.
Happy to hear if any forum members know of a compact solution for C-track curves ...
Mark
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1 user liked this useful post by revmox
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Joined: 26/05/2021(UTC) Posts: 198 Location: Australia, East Maitland, NSW
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New version with easier mounting and now includes single and dual straight track, single and dual R1 - R2, single R3. For what I'd guess we'd call an unguarded crossing in Australia - going back 50 years to when there was a lot less regulation and apparently the general population was a bit brighter.    Clearance to mounting hole centres is 8mm with 22cm coach on R1. Have made some dodgy items to go in the 4mm mounting holes but plenty of much better items available out there I'm sure.  Files below and 3D models public on TinkerCAD - see original post for notes.  Hopefully all 12 stl flies in this zipped folder ... ? Marklin GC 4.zip (237kb) downloaded 18 time(s).The low height of the pukos remains an issue for any homemade curved design. C track sections are pretty uniform but the range specified in the standard is quite broad. Happy to hear of solutions ... BTW - Here's what the standard says - For optical reasons, a row of point contacts is usually used as the middle conductor instead of a continuous rail. Distance: The point contacts are generally placed at threshold spacing; twice the threshold distance (approx. 16 mm) must not be exceeded. Altitude: Between 1.8 below SE and 0.6 above SE. (I assume that's the rail surface). Lateral Deviation: on normal track: Usually +/- 0, in turnouts: Individual point contacts can be up to approx. 2.2 mm off center. The lateral deviation is due to the switch geometry. However, it must also not exceed ± 2.2mm.
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7 users liked this useful post by revmox
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