Adventures in prototypical True-Scale coupler pockets.

[wcfn100]

So here's the Shapeways' file with 8 pieces sprued together.  It's never been printed with anything other than FUD so I don't if it will work.  And you'll obviously have to add supports.

https://cgwmodeler.com/picturepost/couplerassm8.stl

If anyone is looking for things to print, I have several files I'd love to see tried in resin. 


Jason

[C855B]

Super. Came right up in MeshLab, so these will print just fine. Thanks!

You wouldn't happen to still have the ore car STL, would you? The one with the adapter plate? I'd like to see how those behave in resin, too. I think the FUD was one of the issues limiting swing when I had the <24" curve derail issue when directly coupled to locos.

[wcfn100]

Super. Came right up in MeshLab, so these will print just fine. Thanks!

You wouldn't happen to still have the ore car STL, would you? The one with the adapter plate? I'd like to see how those behave in resin, too. I think the FUD was one of the issues limiting swing when I had the <24" curve derail issue when directly coupled to locos.

Yeah, I can grab that from SW too.  I'm curious if the push in cover plates work with resin.


Jason

[Sokramiketes]

If anyone is looking for things to print, I have several files I'd love to see tried in resin. 


Jason

You've got my email 

[ednadolski]

Thanks Jason!

[garethashenden]

I'm having a scale problem. Is it me or you? Here we have one of my attempts next to your 8 coupler pockets. They're tiny! Never had any other problems like this.

[ednadolski]

Unit (metric?) conversion on file import?

[wcfn100]

Yeah, probably the units. I believe these are drawn in inches not sure how the .stl stores it.

Jason

[garethashenden]

Working on the assumption that this was an inch/metric problem I increased the scale by 254%. Since there are 25.4mm per inch. That was still too small, but 2540% looks right.

[peteski]

Without me revisiting the whole thread, what is done to the coupler shanks?  The "spring" leafs at the back of the shanks are cut off and the coupler is allowed to swing freely to the sides?

[wcfn100]

Without me revisiting the whole thread, what is done to the coupler shanks?  The "spring" leafs at the back of the shanks are cut off and the coupler is allowed to swing freely to the sides?

The collars are also sliced just next to the shank one on side to provide for more spring to open the coupler faces,  Finally, the collars are heat welded together at the slice to keep the coupler closed.


Jason

[ednadolski]

The collars are also sliced just next to the shank one on side to provide for more spring to open the coupler faces,  Finally, the collars are heat welded together at the slice to keep the coupler closed.

Isn't there also a pin or such that is cut off?

Edit:

Next I trim down the injection pin(?) as it sits between the two parts and could cause issues.

Ed

[peteski]

Thanks Jason!

[wcfn100]

I knew I had some shots of the mods.  Here's the slice. It's in the same place for both pieces and then welded next to the opening

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Jason

[peteski]

Even clearer - thanks Jason.