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3D Printing the JLC GG1 Sideframes

gunrunnerjohngunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

This discussion started in another thread and I thought it might make more sense for it to have it's own thread.

@J.Dooley posted:

I have a new handheld 3D scanner coming shortly, and I'm very interested to see how it does with complex parts....like JLC zinc-rotted GG-1 truck frames.

I'd love to see this happen.  I was thinking about the sideframes, and I had an idea.  It might make sense to create them in multiple parts.  The actual sideframe could be a part, it would be easy to print them facing up, shouldn't require any supports.  Then print the center section with provisions to screw the sideframes to the center section.

Looking at the complete sideframe, I think it's going to be a lot more difficult to print that all as one piece and get a quality print.  Obviously, getting a good quality scan is the major step in creating these.

Last edited by gunrunnerjohn
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J.DooleyJ.DooleyOGR Forum Member DIGITAL SUBSCRIBER

I have some thoughts.

1) While it would be great to have a replacement that is fully-functional and lets the locomotive run like new, I'd settle for being able to put it on the layout for brief runs and have it sit on a display shelf and look pretty.

2) The challenge is going to be the fidelity of the scan. If we can get that without having to damage a good sideframe like we had to with the metal casting process, we have options. The resolution on resin printers has gotten really good, I'd be interested in trying to print them a couple different ways to see what works.

gunrunnerjohngunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

I think the big issue will indeed be the fidelity of the scan, everything hinges on how well that's done.  As for printing them, I am quite confident that they can be printed with excellent quality even on an FDM printer.  I'm pretty new to the 3D printing arena, but I've been quite impressed with some of the print quality I've gotten out of my Creality K1C.  I'm sure sideframes printed with my FDM printer will easily pass the 2 foot test.

The quality of the scan is clearly going to the lion's share of the work from what I've seen.

Rich MelvinRich MelvinOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER
@gunrunnerjohn posted:

...I'm sure sideframes printed with my FDM printer will easily pass the 2 foot test...

Oh my...that comment triggered an old memory!

I once had a 1956 Ford that had a 50/50 paint job. It looked fine at 50 feet or going by at 50 mph. Any closer or slower and it was awful.

Seriously, if you guys can make this happen, it will be a great project for the OGR 3D Catalog.

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