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Duet is the Arduino Due Compatible RepRap Electronics
Re: Filtration System - 10 years ago
Quote3ntrlab QuoteAlexander1984 Imagine - 3mm filament squeezing out of a 0.5mm nozzle (which is rather big these days) produces around 150bars of pressure inside the nozzle! going down to 0.35 will up this only more While I agree more or less with the concern of having a 3d printer near children... can you please tell me how you can prove that the pressure inside nozzle is 150 Bars (= 150 Kg/by greenman100 - Safety & Best Practices
Re: Custom electric motors - 10 years ago
You cannot run those motors at stall torque, you will break the gearbox in short order. Yes, you can run the beta motor at 19v, beyond that you will shorten the life of the gearbox drastically. I assumed that since you already posted over on Soliforum about running at 19v that you were looking to increase beyond that, for which there is not very much headroom.by greenman100 - General
Re: Custom electric motors - 10 years ago
Quotesungod3k Yes i didnt see anything which leads me to believe that its not pressed. Its probably not that hard as well to find this helical cog somewhere else, but most producers only are B2B only thats really annoying. Another thing: would you worry about the gear itself having a limit in its power transmission? It was suggested to me that I shouldnt switch motors because the gear wasnt rateby greenman100 - General
Re: E3D or J-Head? - 10 years ago
For ABS/PLA, there's no reason to go beyond a J-head - and I say that as a US distributor of E3D hotends.by greenman100 - Plastic Extruder Working Group
Re: Is Filastruder a better option than building your own extruder? - 10 years ago
Tim here, from Filastruder. I can say that the first two cases are definitely not the whole story, I'll leave it at that as to not badmouth people behind their backs. As for the third case, well it is indeed frustrating when people don't read the instructions. For each of those three cases, there's a dozen customers posting the opposite - here's a quote from an email I got just last night: Quoteby greenman100 - Plastic Extruder Working Group
Re: Differences between hotends? - 10 years ago
I would recommend the E3Dv6, I've heard great things and it has been a champ for me personally. It can handle higher temperatures as opposed to the PEEK-based solutions. Wood is ok, metal/acrylic are better but more expensive.by greenman100 - General
Re: E3D v5 versus v6 - 10 years ago
Everything Marty said is correct. Also v6 nozzles are backwards compatible with v5 hotends if you don't want to drill.by greenman100 - General
Re: Anyone familiar with FDM & Nylon 12?? - 10 years ago
Man, lots of fail in this thread. Jerseygirl: You can print Nylon 12 in FDM, on a Reprap or any other consumer printer. Investrite: No reason to guess. UTS of ABS is ~40MPa UTS of Nylon 12 is ~50MPa UTS of Stainless is ~850MPa Consider that layer bonds fail before the material does, so expect a little less from FDM than the above strengths. You need at least 20 times more material in FDM toby greenman100 - General
Re: Cheap eBay hotends - 10 years ago
Because surface finish dictates friction coefficient, and you want as little friction in a hotend as possible. This is why non-metal hotends are lined with PTFE.by greenman100 - General
Re: Cheap eBay hotends - 10 years ago
Quoteepicepee As with so many things RepRap, the price of hotends on eBay has been coming down. I found a clone of the E3D v5 for $34 and there are quite a few more. What strikes me about these is that because they're all-metal there doesn't seem to be much room for them to be built badly. Has anyone tried these hotends? I think my J-head is nearing the end of its life... Actually there's loby greenman100 - General
Re: Anyone know how to tell one E3D nozzle from another? - 10 years ago
QuoteUkIan Looks like some of my recent printing woes are that the nozzle on my e3d v6 head is 0.5 instead of 0.4. I've pulled a nozzle of the kraken and switched it in and things seem better. The problem of course is, as far as I can see, none of the nozzles have a size printed on them. Any ideas? Kraken (and all E3D hotends) come with 0.4mm nozzles by default. E3D does not produce 0.5mm nozby greenman100 - General
Re: Hot end recommendations - 10 years ago
Quotevreihen E3D is available in the USA from Maker's Toolworks and Filastruder..... 5% off with couplon code reprap at Filastruder makes it $79 shipped!by greenman100 - Reprappers
Re: E3D Extruder. - 10 years ago
Quotekaragad I want to buy it on aliexpress for $22, without fan. And there is one for $60 on EBay with fan. That is not an E3D, and almost certainly won't work. Buy genuine, or buy twice.by greenman100 - Plastic Extruder Working Group
[USA] E3Dv6 hotends - coupon code inside - 10 years ago
I'm an official US distributor for E3D: Use coupon code "reprap" for 5% off the E3Dv6 hotend. Happy printing!by greenman100 - For Sale
Re: this is why you don't leave your printer unattended - 10 years ago
Quotethejollygrimreaper i have done this test again one the 12v power supply and the wirewound 5.7ohms resistor seems pretty safe it topped out at 330c odd https://www.youtube.com/watch?v=vVRwHwxNy7s Why is this odd? Its 25 watts instead of 40w...by greenman100 - Safety & Best Practices
Re: QU-BD Problems - 10 years ago
Quotepbrstreetgang I don't get the name change either. Qu-bd had a ring to it. Quintessential universal building device is a monstrosity. It's like FedEx. It's not Federal Express, it's just FedEx. 3D Systems gave them a C&D for their name being too similar to "Cube".by greenman100 - General
Re: Fire Hazard - 10 years ago
Again, that only works if the bed heater is active. if it isn't, you happily pump 100w through a 40w heater.by greenman100 - Safety & Best Practices
Re: Fire Hazard - 10 years ago
So your "safety" system is predicated on the bed heater being on, and at a temperature high enough to draw an average of 60w. Its also a recipe for disaster if you or anyone else flashes firmware with incorrect MAX_PWM values. Hardly a good solution, and arguably less safe than using 12v power with 12v rated parts.by greenman100 - Safety & Best Practices
Re: Fire Hazard - 10 years ago
If the MOSFET fails on, it doesn't matter if the power supply is a $2k pro grade lab supply, the MOSFET failing on will power the heater at 100%. This will drive it to extreme overheating. If the light switch in your house sticks on, then the light will stay on regardless of how "good" your power company is. Same story here. I don't know how else to explain, I am 100% sure that you are wrong.by greenman100 - Safety & Best Practices
Re: Fire Hazard - 10 years ago
QuoteHazer Quotethejollygrimreaper i solved this problem many moons ago by using axial thermistors and insulating the leads with ptfe sleeve: click here using this method there is nearly no easy way to get it into a thermal runaway mode, as the thermistor cannot physically leave the heater-block, Thermal runaway is not limited to loose thermistors. There have been failed-on MOSFETs and stuck pby greenman100 - Safety & Best Practices
Re: Fire Hazard - 10 years ago
Quotethejollygrimreaper failed mosfets are a bit of a different story however they still can be protected against very easily however this comes back to the powersupply and actually having overload and short circuit protection as advertised, this is something that seems absent in most of these industrial power supplies that come in from china what i have done to take care of this scenario in allby greenman100 - Safety & Best Practices
Re: Update on the E3D All Metal Hotend (Now finally shipping!) 
[Lots of pictures] - 10 years ago
Quoteplexus Has anyone with a v5 tried a v6? I use v5 and want to know if its worth the $100 to upgrade the relevant parts/nozzles to v6? (I am guessing not, but would like to know) specifically I am looking for data on print quality v5 vs v6. thanks! The upgrade would be much closer to $60, since you can reuse the fan, heater, and thermistor. $61.46 from Filastruder, in fact.by greenman100 - General