3D Printing Parts - Page 4 - RC Groups
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Aug 08, 2009, 11:28 AM
pick013's Avatar
Originally Posted by Umi_Ryuzuki
Here is a couple pictures of the demo pieces that are programmed into
the techshop machine... And once the support material is removed, the
crescent wrench, and the... uhh.. gear thingy actually work.

I have seen print outs of the granular printers, and it reminds me of
making sand candles at the beach...

Gear thingy is a Geneva mechanizm...used for indexing, still used, but is slowly getting replaced by servomotors
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Aug 12, 2009, 08:33 AM
Registered User
this was on wired this morning for the full up kit it was $950!!! Not bad!
Aug 12, 2009, 08:55 AM
Mmm, tugs...
patmat2350's Avatar
interesting, but see the rough resolution... it's still challenging to use the process for small finely detailed parts.
I'd sure like to have a laser cutter at home though!
Aug 12, 2009, 05:57 PM
Mmm, tugs...
patmat2350's Avatar

I think we have a winner...

Got my parts today from Shapeways in the Netherlands. Hard to capture white parts in the photo, but they have all the same detail (and strata) as the PrintaPart parts, and similar plastic "hardness". Pricing was better, overseas purchase was easy with Paypal (not offered by PaP), and delivery was UPS with tracking, which only took a few days from the shipping notification (PaP used USPS Priority, which was fine).
Jun 19, 2010, 08:22 AM
Mmm, tugs...
patmat2350's Avatar

Cowl Vents

Finally got around to ordering some 3D-printed cowl vents from my own design, for use on the 1:32 Foundation Franklin steam tug.

Exceeded my expectations!

These were ordered in a photo-polymer material, which means the process uses laser hardening of a liquid polymer. I've also ordered other parts (like the anchor) in SLS, which is Selective Laser Sintering... dry nylon powder is fused together in layers, which produces a slightly porous, gritty part. This photo-polymer process produces smoother, non-porous parts, but they need to be washed... a bit of the wet stuff leaves a tacky film on the parts, as-delivered.

These vents are sized to fit standard English sized brass tubing, with a small shoulder adapter. I'll build a base for the tubing to finish off the parts.

You just can't order anything anywhere that approaches this quality for these hard-to-build cowl vents. I'm happy.
Last edited by patmat2350; Jun 19, 2010 at 10:20 AM.
Jun 19, 2010, 11:36 AM
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osalvat's Avatar
how cool...how nice!, very impressive Pat.
man FF is getting top notch tech!
Jun 19, 2010, 11:38 AM
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osalvat's Avatar
...can't wait!
Jun 19, 2010, 01:32 PM
Sea Dragon-Lover
Umi_Ryuzuki's Avatar
Wow,... Pat,

The resolution on those looks excellent.

Jun 19, 2010, 04:55 PM
Spreckels Lake, GGP, SF, CA
craig_c's Avatar
Makerbot's Cupcake 3d ABS plastic printer
Last edited by craig_c; Jun 19, 2010 at 06:45 PM.
Jun 19, 2010, 05:16 PM
Mmm, tugs...
patmat2350's Avatar
Interesting... but I found no detailed images of finished parts. Given that it's extruding blobs of molten plastic, I expect it will be pretty coarse. With the parts above, I get a smooth surface out of the box... and that's the real key to being able to use these methods for scale model parts.
Jun 19, 2010, 05:28 PM
So broke I can't pay attention
That's fantastic!
Yep! it's time for me to drag the big garbage can into my shop, and get rid of all my hobby tools ect. and maybe take up knitting with the wife.
Nov 26, 2010, 04:04 PM
Mmm, tugs...
patmat2350's Avatar
Check out this 1:9 scale pilot someone has listed at Shapeways:
3D figure modelers (in CAD!) have my respect... I can draw circles and boxes...

Gritty, yes.... not sure how to get around that. I think some modelers use a dip, but that will soften the details...

Last edited by patmat2350; Nov 26, 2010 at 04:56 PM.
Nov 29, 2010, 08:04 AM
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seegurke's Avatar
The vents are really impressive! I heard of the technologie but until now I didn't know that there are companies that make it availible for private use. Have to start some CAD-drawing in winter to test it.

There are two small questions left at the moment:
What material did you exactly ordered for the vents? Is it this one?
And did you try to paint and glue it already? The glossy surface makes me think about problems but may be for no reason.
Nov 29, 2010, 08:56 AM
Mmm, tugs...
patmat2350's Avatar
Yes, I used the "white detail" photopolymer. But in the future, I would use "strong white flexible", which is laser-sintered dry nylon powder. It is rougher, but stronger and with a higher heat deflection temperature. It also avoids the sticky surface that seems part of the photopolymer process.

I washed the parts in solvent and soap, and they were painted without problem.
Nov 29, 2010, 11:10 AM
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seegurke's Avatar

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