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Plastics, Epoxies, Resins, Photopolymerization, etc - Research, Development, Use, and Analysis -> http://objects.reprap.org/wiki/Plastics
Re: would you buy a printer with a price of USD $ 2676.00? 350 x 350 mm x 350 resolution of 0.1 mm - 13 years ago
Nope (not to mention there is SO much more to consider other than resolution, build size, and cost) asking a forum full of people trying to build their own machines at minimum cost is probably not the best place to be asking if you want to get a 'feel' for the market.by Andrew Diehl - General
Re: Standard Interface for Extruders - 13 years ago
In reality, standard ribbon cables/connectors are just about the most widely available. If oriented properly, they can survive repetitive stresses quite well, too. Also, you can leave every other strand unused and grounded to act as a shield.by Andrew Diehl - Plastic Extruder Working Group
Re: Nichome vs. aluminum clad vs. tip120 vs PCB vs ?? heated bed feedback? - 13 years ago
I use a poorly etched PCB epoxied to a .1875in AL sheet. Works beautifully. I usually run it at 110-120C. Only failed once, due to crappy etching. The circuit just opened. I'm sure professionally made PCB's work much better. PROS: Even Heat Distribution Simple, clean implementation Very little space required Lightweight CONS: Relatively expensive (if you use a Professionally manufactured boaby Andrew Diehl - General
Re: Forum closed. 
Reason: because you're all developers! - 13 years ago
Some of us "Developers" MUCH prefer forums and would simply not participate in a mailing list. Mailing lists are notoriously hard to search/navigate, and they don't even show up in Google searches, do they? Maybe Adrian should be posting in the forumsby Andrew Diehl - Kartik M. Gada Humanitarian Innovation Prize
Re: using hydrolics to drive extruder? - 13 years ago
Very Very Very Messy. I would avoid putting anything with hydraulics on MY desk...by Andrew Diehl - Plastic Extruder Working Group
Re: ULTIMAKER: Belts, Timing Pulleys & Bushing - 13 years ago
sdp-si has all the pulleys you need, though you may need to drill and tap a set screw into certain pulleys. It looks like the ultimaker uses mxl sized belts and pulleys. I couldn't find a good source for stock brass/graphite bushings, but using an O (as in Orange) drill bit makes a perfect slip fit on 8mm shaft, so you can make your bushings out of whatever you want. Plastic works almost as welby Andrew Diehl - General
Re: Who are you people? - 13 years ago
Mechanical Engineering. Open source is essential to reprap's existence.by Andrew Diehl - General
Re: ultimaker, makerbot, and reprap - 13 years ago
Ultimaker appears to be a MUCH more well thought out machine. It is slightly more expensive to produce than other competing models, but it promises to have better rigidity, speed, and footprint/build area ratio; mostly because it is the new kid on the block and has learned from other's mistakes. Did I mention they have great assembly documentation so far? It's still somewhat unknown how well itby Andrew Diehl - General
Re: Can't get AVRISP MKII to work -- PLEASE HELP - 13 years ago
I assume you are using windows? replace /dev/ttyacm0 with the com port ie: COM4by Andrew Diehl - Controllers
Re: Wade extruder slip - no grip - 13 years ago
How about running a short piece of filament through without any nozzle/heater? That usually shows how well the teeth are biting and what the compression of the filament is. I squash it more than most (probably to 66% of OD for abs) but I can extrude at least as fast as anybody else, with good results.by Andrew Diehl - Plastic Extruder Working Group
Re: self-replicating factories? - 13 years ago
Lots of goods are produced without any direct human interaction. Lightbulbs, microchips, sprigs, cereal, bottled soda, and crayons to name just a few. From a purely theoretical perspective, most factories are 'self replicating' in the respect they are almost entirely manufactured by similar machines. Assembly is still done by humans on most CNC products, mostly due to the low volume and the highby Andrew Diehl - General
Re: Arcol Hot End and Licenses - 13 years ago
What would be the point of a patent if any form of arbitrary copyright/license actually provided protection for the physical device?by Andrew Diehl - General
Re: Arcol Hot End and Licenses - 13 years ago
All this is pretty much moot until significant money is involved, which there will never be. Plus, all it takes is a minor variation to circumvent the "copyright" (if it is even valid in the first place) because of the open source nature of all the constituent pieces.by Andrew Diehl - General
Re: Ultimaker 12v Cartridge Heater - 13 years ago
AgeingHippy Wrote: ------------------------------------------------------- > Seems like trying to fix something that aint > broke!! I'm pretty sure that is the reprap anti-motto I'm looking for a simple, completely reliable, aesthetically clean solution. Cartridge heaters are it. I just want to know where to find this hard to find part (until ultimaker makes them available )by Andrew Diehl - Plastic Extruder Working Group
Re: Ultimaker 12v Cartridge Heater - 13 years ago
link This way is just much cleaner.by Andrew Diehl - Plastic Extruder Working Group
Ultimaker 12v Cartridge Heater - 13 years ago
Could be the best thing for extruder reliability since the hobbed bolt. Anybody know where they get it from?by Andrew Diehl - Plastic Extruder Working Group
Re: Multiple Extruders - 13 years ago
Aha. So no way to set the filament diameter and different feed rate settings for different extruders, really.by Andrew Diehl - Skeinforge
Re: Project: Teacup Firmware - 13 years ago
> Is there any machine out there with multiple > extruders? YES (almost) And I just finished a set of experiments printing with nylon. Conveniently, ABS dissolves in acetone while Nylon does not Now as soon as there is dual extruder support in skeinforge and teacup we're set to do some pretty awesome things.by Andrew Diehl - Firmware - experimental, borrowed, and future
Re: Clogged Tip - ABS decomposed at too high temperature? - 13 years ago
Oh well. (sorry if you said that already, I must have missed it)by Andrew Diehl - General
Re: Clogged Tip - ABS decomposed at too high temperature? - 13 years ago
Maybe try dissolving away the abs with acetone first.by Andrew Diehl - General
Re: Project: Teacup Firmware - 13 years ago
Hey everybody, Any plans to put support for dual extruders into the firmware?by Andrew Diehl - Firmware - experimental, borrowed, and future
Multiple Extruders - 13 years ago
Any way to use multiple extruders with skeinforge? (one for raft/support, one for everything else)by Andrew Diehl - Skeinforge
Re: Quality Comparison - 13 years ago
This is not meant to be a scientific study comparing and contrasting multiple aspects of different printers. A small sample of the best from a variety of printers is all I'm looking for. For somebody just getting into things and saying "what kind of quality can I achieve with X" this will be hugely useful (and hopefully inspiring). I've seen a lot of talking down about reprap on other hobby fby Andrew Diehl - General
Quality Comparison - 13 years ago
It's struck me that there really isn't a good way to compare the print quality of the different typed of machines out there (ie makerbot, mendel, prusa, huxley, up! etc.) I'd really like to start a wiki page with a bunch of different printers making the exact same (fairly simple) part, so you can see the end results side by side. A nice large high quality macro image, specifically. I realizeby Andrew Diehl - General
Re: Extruding Nylon - 13 years ago
I think the problem is as much mediocre adhesion to the kapton as extra warping stresses. I'll post more as some testing gets done this week.by Andrew Diehl - General
Re: Fine tuning print settings - 13 years ago
nophead 2 for 2 :p I dried the abs at 170F for a few hours and the bubbles all vanished. I guess the stuff makerbot sells doesn't quite work out of the sealed desiccant laden package... Also found a loose Y pulley which I believe was responsible for the bulge at the corners. I think some of the wavy is also from vibrating ball chain (my current drive belt) especially since my machine is wider tby Andrew Diehl - Skeinforge
Re: Generation 6 start up - 13 years ago
That workaround is kinda risky. It allows the steppers to move without the program knowing that they have, and can lead to extruder crashes.by Andrew Diehl - Reprappers
Why use springs on the extruder? - 13 years ago
Why use springs instead of a "fixed" position for the pinch wheel bearing? From my admittedly limited experience I get the same end results from squashing the filament with a fixed bearing as I do from using a spring. Is there some downside to plastically deforming the filament?by Andrew Diehl - Plastic Extruder Working Group
Re: Extruding Nylon - 13 years ago
It's official. Nylon can be printed. Unfortunately, it has so far proven to be extremely prone to warping, even at a bed temp of 105C.by Andrew Diehl - General
Re: Project: Teacup Firmware - 13 years ago
After 48 days, I finally got my reprap printing with teacup (from the Arduino IDE and Windows, no less) Thanks for all the help! ~Andrewby Andrew Diehl - Firmware - experimental, borrowed, and future