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Dremel gives high-tech tools a spin with $999 3D printer
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 Posted: Tue Oct 7th, 2014 04:13 pm
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bobquincy
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I see the 3D printer as another tool to use for making parts that would be difficult to get any other way.  My N scale chassis were so difficult to machine that I only got one out of three that was usable.  There was no way I could sell them with each one taking about 8 hours and that many rejects.  Now they all come out ok (as long as I draw them correctly) and I can afford to offer them for sale.

Never mind that when I sold the first N scale monorail I may have saturated the world market!  ;)



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 Posted: Wed Oct 8th, 2014 10:14 am
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Bernd
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Hi Bob,

What was so difficult in machining a frame for N scale? I know pictures are probably something you don't want to show in case somebody want's to copy them. But I'd be interested in what one looks like. I've done a couple in HO scale for myself. Worked pretty good.

Bernd



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 Posted: Wed Oct 8th, 2014 06:07 pm
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bobquincy
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If someone wants to copy this I wish them luck in copying *and* selling!  ;)  Btw, I am an electrical engineer but not a very good machinist.
The chassis started out as just a version of what I was machining but as I learned more about "additive machining" there were a lot of changes to reduce the post-machining.  3D printing doesn't do small threaded holes and the accuracy is not good enough for axle bearing holes so I still do those on a mill.

This is the latest chassis for the powered cab:






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 Posted: Wed Oct 8th, 2014 06:59 pm
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Bernd
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Yes that would be one tough machining project to do in one machining. Something like that would need several pieces made individually and then assembled into a final chassis.

I'd be interested in seeing a picture of the finished product when you get it printed.

Thank you for satisfying my curiosity. 

Bernd



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 Posted: Wed Oct 8th, 2014 07:49 pm
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bobquincy
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This is the current version (MkIV) as delivered from Shapeways.  The MkV was just ordered and should be here in about 10 days.  It is packed when the motor, radio, and battery are installed!






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 Posted: Wed Oct 8th, 2014 10:06 pm
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Bernd
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Very nice Bob. :2t:

Sure would be hard to machine that's for sure.

Bernd

Last edited on Wed Oct 8th, 2014 10:06 pm by Bernd



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 Posted: Thu Oct 9th, 2014 10:32 am
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Herb Kephart
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I would make a multiple part plaster mold from that, and cast them in some lead/tin alloy.

But that's just me, and what I'm comfortable working with.

Herb



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 Posted: Thu Oct 9th, 2014 01:02 pm
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Bernd
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Herb Kephart wrote: I would make a multiple part plaster mold from that, and cast them in some lead/tin alloy.

But that's just me, and what I'm comfortable working with.

Herb


I'm old school also as far as fabrication and casting is concerned. But still if your going to make multiples casting is the fastest way to go. Looks like a bit of coring would be needed on this one.

Bernd



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 Posted: Sun Dec 28th, 2014 05:59 pm
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Tramcar Trev
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Over the 50 years or so I have been building models ( of all sorts) I have seen major changes. I used to make small oscilating marine engins by hand, not so much as an electric drill now I find CAD and the PC my closest friend with it I can make such diverse thing as stained glass quarter lights and stained glass glazing for clerestory roofs.....So I guess a 3Dprinter will soon be on my bench somewhere, in the interim I have found a place full off geeks and nerds who think 3D printing is steam age stuff and they seem happy to play around with my ideas "just to keep their hands in"..

I have been looking at getting an A4 laser cutter; http://www.ebay.com.au/itm/CO2-LASER-ENGRAVING-MACHINE-FDA-COMPLIANT-CUTTING-ENGRAVER-HIGH-PRECISE-POPULAR-/321081981831?pt=AU_Business_Industrial_Printing_Equipment&hash=item4ac1fa3b87 cheap enough and seems also quite accurate also a 3 axis CNC engraver mill, not as cheap but when you want to make a side up for a car, shed, building or doors and windows this would be invaluable and unlike the laser this will cut brass and softer metals; http://www.ebay.com.au/itm/3020T-DJ-3-Axis-CNC-Router-Engraver-Milling-Drilling-Machine-/191414606224?pt=LH_DefaultDomain_15&hash=item2c91331990

As for the Dremel 3D printer..... Dremel and I have "issues" their rotary tools keep burning out on me.
I have seen the work this one can produce and after a bit of a dunk in acetone the bits look really like an injection moulding. A trap for newbies is to expect too much and draw in too much detail, print out the detail bits seperatley when feasible. Its cheap but not nasty; http://www.ebay.com.au/itm/High-Precision-Mini-Desktop-MK8-Extruder-3D-Printer-Full-Assembled-Prusa-Mendel-/141504850940?pt=AU_Toys_Hobbies_Model_Kits&hash=item20f258abfc



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 Posted: Tue Dec 30th, 2014 05:29 pm
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Tony M
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Hi Trev, interesting stuff, I am looking at a quick way to scratch build my wind turbine generator blades for a HO scale train load and looking at casting them.
Is taking too long to scratch build each one out of cardboard and the cardboard is too stiff to go around curves, the blade has to bend slightly.

How much would it cost to do so, be awesome way to go 3/D printing, be too costly, my blades are 20inches long.

Happy new year from Tony in QLD, stinker of a hot day for the last day of 2014.

Last edited on Tue Dec 30th, 2014 05:30 pm by Tony M

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