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Post by jbconn on Jan 29, 2018 11:10:48 GMT -5
Straight from the 3D printers with a shot of rattle can primer to show the details. Just a few tweaks and I'll be ready to go after 6 years of thinking about this. Photo 1Photo 2Photo 3She sits on a Kato SD45 frame and (temporary) walkway. I have the 2-axle trucks and am finalizing how I need to modify the frame to fit them in place of the three-axle trucks. I need to finalize the 3D printed fuel tank and underbody details and she will be ready for paint. Jim C |
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Post by jmlaboda on Jan 29, 2018 11:47:54 GMT -5
Nice!!!
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dekon
Staff Member
Posts: 634
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Post by dekon on Jan 29, 2018 17:46:59 GMT -5
Very nice! I miss seeing them in RI.
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EMDX6043
Chairman
Future ex-modeler
Posts: 837
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Post by EMDX6043 on Jan 29, 2018 21:28:59 GMT -5
Looks good...was it FXD? How'd you prep your shell?
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Post by slowfreight on Jan 29, 2018 22:11:40 GMT -5
That's some cool stuff there! Is it your part design?
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spike
Chairman
They say I can't be Spike anymore, so Mr. Burns it is!
Posts: 561
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Post by spike on Jan 30, 2018 7:53:39 GMT -5
That’s really nice! I see your B&M maroon unit in the back!!!
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Post by jmlaboda on Jan 30, 2018 14:58:16 GMT -5
You know, the quality of the drawing and the choosing of FXD will yield some really beautiful results some times. I really wish that designers would do more in regards to FXD but some refuse leaving customers to fend for themselves even though a better print is available.
Some can be really sharp with FXD while others not so much. It is the quality of the drawings that provide for the better prints but I too would like to hear about what might have been done to improve the look of your model... when enlarged the print really looks good...
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EMDX6043
Chairman
Future ex-modeler
Posts: 837
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Post by EMDX6043 on Jan 30, 2018 18:13:20 GMT -5
You know, the quality of the drawing and the choosing of FXD will yield some really beautiful results some times. I really wish that designers would do more in regards to FXD but some refuse leaving customers to fend for themselves even though a better print is available. Some can be really sharp with FXD while others not so much. It is the quality of the drawings that provide for the better prints but I too would like to hear about what might have been done to improve the look of your model... when enlarged the print really looks good... I was told by one designer that FXD might require a larger 'bounding box' than FUD, so some items may not even be possible in anything besides FUD. Given time, I'm sure the technology will continue to improve just like anything else. |
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fr8kar
Chairman
Little man raise the cotton, beer joints get the money
Posts: 309
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Post by fr8kar on Jan 30, 2018 21:06:17 GMT -5
I was told by one designer that FXD might require a larger 'bounding box' than FUD, so some items may not even be possible in anything besides FUD. Given time, I'm sure the technology will continue to improve just like anything else. It's the opposite. The bounding box for FXD is significantly smaller than for FUD. I have several HO scale caboose parts I've uploaded to Shapeways. Small things like smokejacks and cupolas are possible in FXD, but larger parts like caboose roofs and body kits are too large to fit. The quality of the printed parts is affected by many factors, but the quality of the drawing and the orientation of the model in the printer seem to be the biggest factors, especially for the FUD and FXD acrylics. |
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EMDX6043
Chairman
Future ex-modeler
Posts: 837
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Post by EMDX6043 on Jan 31, 2018 8:17:25 GMT -5
I was told by one designer that FXD might require a larger 'bounding box' than FUD, so some items may not even be possible in anything besides FUD. Given time, I'm sure the technology will continue to improve just like anything else. It's the opposite. The bounding box for FXD is significantly smaller than for FUD. I have several HO scale caboose parts I've uploaded to Shapeways. Small things like smokejacks and cupolas are possible in FXD, but larger parts like caboose roofs and body kits are too large to fit. The quality of the printed parts is affected by many factors, but the quality of the drawing and the orientation of the model in the printer seem to be the biggest factors, especially for the FUD and FXD acrylics. That's right...I think we talked about that on my F40C thread. It almost looks like the GP40MC was printed on a tilt when I zoom in on the nose photo...the shell I bought was all horizontal. What keeps the bounding box for FXD from being the same size as the one used for FUD? |
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Post by jbconn on Jan 31, 2018 11:14:50 GMT -5
Thanks for your comments.
The design is my own, based on photos and detailed measurements. I did it in Sketchup, and printed it in FUD on Shapeways. I did not specify orientation for the test print but may later.
The cab is too delicate, so I'm adding some internal reinforcement. The long hood is tough as-is, but needs a few tweaks for the cab to properly fit and to fit the frame.
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Post by jmlaboda on Jan 31, 2018 12:58:45 GMT -5
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Post by pwrailfan on Feb 3, 2018 6:19:15 GMT -5
Do you plan on selling prints?
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pault
Road Foreman
Posts: 57 
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Post by pault on Feb 5, 2018 7:42:36 GMT -5
Straight from the 3D printers with a shot of rattle can primer to show the details. Just a few tweaks and I'll be ready to go after 6 years of thinking about this. Photo 1Photo 2Photo 3She sits on a Kato SD45 frame and (temporary) walkway. I have the 2-axle trucks and am finalizing how I need to modify the frame to fit them in place of the three-axle trucks. I need to finalize the 3D printed fuel tank and underbody details and she will be ready for paint. Jim C |
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pault
Road Foreman
Posts: 57
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Post by pault on Feb 5, 2018 7:50:00 GMT -5
i would be interested to see how that frame modification works out i have a few projects that will also need that type of work also they will involve adapting different manufactures parts for a specific prototype.
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pault
Road Foreman
Posts: 57
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Post by pault on Feb 5, 2018 8:15:05 GMT -5
i beleave i saw something like that on PLW blog recently you may want to check it out
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Post by jbconn on Mar 4, 2018 21:14:11 GMT -5
All, Another month, but this time some progress I think. I abandoned the frame modification. What I had planned as to grind out the surface the truck rides on and locator pin and replace it with a piece of aluminum with a screw inserted. The aluminum would be soldered in a slot cut horizontally in the frame in a location that would give the proper ride height. Turns out that the place I needed to cut the slot was too hard to reach with tools I had available. Machine shop could do it, but too costly and too hard to replicate for someone else when/if I decide to sell the parts. I had already created a shape based on the Kato SD45 frame to wrap the fuel tank part and walkway around. I modified that to turn it into an actual frame. Pro: Easy enough to design, relatively cheap to produce and now anyone can have one. Con: Only affordable in plastic (at least from Shapeways) so have to add weight to locomotive elsewhere. Latest printout requires a few more tweaks: Ride height for the frame was too low (not sure how that happened) walkway was a bit flimsy, especially the ladder that *used to be attached* to the right side walkway, and clearance at the battery box and steps behind the cab was wrong (causing the bow on the left walkway). The fuel tank and underbody part was too flimsy so I redesigned it for a different material. Cab reinforcement was effective. I dropped this one on the concrete floor and it didn't break (unlike the previous one). May also have helped that I cleaned this lot with Simple Green vs, Bestine, which I think makes FUD more brittle. Also need to be more patient and not put fingerprints on the wet paint of the fuel tank. Photos show her sitting on her Athearn Genesis GP40 trucks and with space in the frame for a Genesis motor. I plan to use smoky valley handrails. Anyone tried to 3D print handrails, and, if so, how did it go? Any tips appreciated.  photos.app.goo.gl/SvKlYswwi3vWeEtj2 photos.app.goo.gl/NCr2ipfTqo5Ts4Ui1 |
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spike
Chairman
They say I can't be Spike anymore, so Mr. Burns it is!
Posts: 561
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Post by spike on Mar 7, 2018 5:12:40 GMT -5
I like this project, and thanks for the update. I model a freelance based on Guilford getting out. This would be a welcome addition to my plans. My layout plan is to do the highlights of Willows-E. Portal.
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Post by pwrailfan on Dec 2, 2018 6:58:21 GMT -5
Any updates?
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Post by jbconn on Oct 2, 2020 12:52:01 GMT -5
Tweaked a few design elements since March 2018. Biggest hang-up is the frame. I have a design that is functional Frame 3-D printed in plastic, but concerned about durability and it weighs next to nothing. Similar-sized Kato (correct length but won't accept 2-axle trucks) or Athearn Genesis GP40-2 frames (too short) weigh 8+ ounces. Hard to find room to cram in 6+ ounces of tire balance weights (densest weights I can find).
- Could 3D print in steel (marginal wall thicknesses in several areas and more than $100 per frame.
- Could 3D print in aluminum (more than $300 and likely still light.
- Exploring online CNC machining. Got one quote for $1,200. Wow... Just wow.
Anybody know a place in eastern Massachusetts that might mill a few from white metal at a reasonable price? I have a CNC step file...
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