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Re: Design Ideas for Cheap 1/8" HDPE Oval Welding Rod - 10 years ago

It is true that HDPE is inexpensive and polypropylene is even cheaper. Printing successfully with them, however, requires quite a bit of experience because of the high heat shrinkage rate of both polymers. It is quite difficult to make larger objects with these plastics. It can be done, mind, but it is quite an art. I know from first hand experience.

Re: Introductions - 12 years ago

This might be interesting. I am in Carmel Valley and was on the Reprap Core Team from 2005-2011. I have two printers in operation; a Rapman 3.1 and an UP!.

Re: Michael Hart - dead at 64 - 13 years ago

Michael Hart - dead at 64 - 13 years ago

One of our longest term Reprap core team members, Michael Hart, founder of Gutenberg Press, has died at 64.

Re: Calilfornia Reprappers sound off - 13 years ago

Luke, I do 3D printing with a BfB Rapman. I'm out in Carmel Valley. Forrest

Re: BioMassive Expo 2011 - 13 years ago

I have a Rapman 3 and expect to have my dual extruder, next generation printer done by then. I can participate. Anybody else?

Re: Plug-N-Play Electronic Box - 13 years ago

Nice!

ABS filament available - 13 years ago

I talked to Donna at New Image Plastics yesterday and learned that Jim Waring at New Image is expecting a small shipment of 100 lbs of ABS pellets next week and will be converting them to 1.73 and 3 mm filament suitable for Reprap machines. If past experience is any guide Jim will get 90-95 lbs yield from the consignment. I've already had a standing order for 30 lbs of that with Jim for several

Re: ABS Filament available - 14 years ago

Thanks for that correction. I'd wondered who'd been ordering 70 thousandths and thought it might have been you. :-)

ABS Filament available - 14 years ago

Jim Waring at New Image plastics is currently offering 3 mm ABS in natural and colours at $7.95/lb. He is also making 0.007" filament {for used Stratasys Dimension machines} at $9.95/lb {you can't walk off and leave the extruder making 0.007 filament, apparently. Ten lb minimum orders. He's got a new shipment of ABS coming in next week and will be able to fill orders pretty quickly. Mind, I a

Re: RepRap arrives in Calgary - 14 years ago

Brian, Check out the BitsFromBytes forum if you haven't already. There are lots of people there who will be more than happy to help you with your teething problems. I've had a Rapman 3 since last November. It's a good, solid machine well worth the price. :-) Forrest

Re: Support Material Category proposal - 14 years ago

LOL! How about if people start actually trying out support materials instead of just talking about them? The discussion of support materials has been going on for five years now, but the actual work on making them real has been effectively zip.

Re: Introducing The Mendel Uni-body - 14 years ago

Looks really nice, foton! Great job! :-)

Re: Printers and Organs - 14 years ago

AlexanderB: I'm told that the folks over at Fab@Home are selling a lot of their new second generation printers to organ printing labs. You might also want to talk to those guys.

Re: Lowest cost threaded rod in Europe - 14 years ago

Unified Thread Standard in the US doesn't use inch ratings below 1/4 inch. 1/8th inch is a #5 threaded rod. You can get #4 fairly regularly in the better hardware stores, though in my experience it is usually bent all to hell.

Re: quality of items - 14 years ago

I'm using a 0.3 mm extruder head instead of the usual 0.5 mm. It makes a world of difference to print quality.

Re: Lowest cost threaded rod in Europe - 14 years ago

Quarter inch threaded rod is 6.35 mm. M6 is about as close as you get to that.

Re: quality of items - 14 years ago

Rapper: You might want to spend a little more time looking through Thingiverse before getting in everybody's faces about print quality. Your ignorance is showing.

Re: ABS VS PLA -- what is worst, more toxic, for our health? - 14 years ago

So what's there to flame? Insofar as overall health impact is concerned, I think that neither ABS nor PLA creates a significant occupational health issue. ABS has been processed in larger applications for many years and we haven't heard of any health blowback in that industry. What we CAN say about ABS is that it creates some acrid fumes when you print with it that are not pleasant to be aroun

Re: Atmega168 Shortage? - 14 years ago

Sounds like arduino has outrun atmega's production capacity. That's bad.

Re: ABS VS PLA -- what is worst, more toxic, for our health? - 14 years ago

Good Lord! From the comments here you'd think nobody every heard of Google. MSDS for ABS... MSDS for PLA...

Re: Why Not use Nylon? - 14 years ago

Nylon is expensive.

Re: The Reprap's impact on the environment - 14 years ago

freds and wayland: {btw, very nice choice of screen name, wayland} I've seen this happen any number of times in different threads. Basically, you have Reprap, which is predicated on viral technology distribution and reducing the scale of manufacturing dramatically so that production localises. That's extremely revolutionary and is going to draw a lot of criticism because it threatens a lot

Re: The Reprap's impact on the environment - 14 years ago

Interesting analysis. Plugging my 0.3 mm extruder Rapman 3.0 into the analysis when it is running at a head speed of 16 mm/sec, about the upper limit for really fine detail work, I find that I am using about 10 Kw-hr/kg of ABS extruded. Not bad.

Re: The Reprap's impact on the environment - 14 years ago

Um... that's a members only website. Here's an open link for the article.

Re: The Reprap's impact on the environment - 14 years ago

martinprice: You've made some interesting assertions. It would be nice to see some published numbers, or any numbers for that matter. Don't forget to factor in transport and distribution costs into the manufacturing costs incurred by your "extremely energy efficient" factories.

Re: The Reprap's impact on the environment - 14 years ago

I don't think that there is much danger of Reprap allowing environmental activists, however well meaning, to exercise a precautionary principle veto over technological research. I know I certainly won't.

Re: RepRap Google Summer of Code 2010 Call for Ideas - 14 years ago

I think we missed the deadline for the programme.

Re: The Reprap's impact on the environment - 14 years ago

Keep in mind that in the plastics fabrication industry that a rule of thumb is that you can use about 50% recycled plastic/50% new resin and get an acceptable product.

Re: Can't find 0.5mm Drill bit! - 14 years ago

Larry_Pfeffer Wrote: ------------------------------------------------------- > Amazon sells sets containing #61 -- #80 (not exact > 0.5 mm, but not far off) > > Good price for a set! #76 is as near as dammit to 0.5 :-) The only problem {I've bought such sets} is that it is really easy to break a #76 and then you have to buy another set. That's a bit of a waste.