tag:blogger.com,1999:blog-4339813531032979196.post3023360867944675155..comments2024-02-28T07:32:59.864+00:00Comments on HydraRaptor: Pot blacknopheadhttp://www.blogger.com/profile/12801535866788103677noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-4339813531032979196.post-86848308724022791212011-12-27T22:15:02.657+00:002011-12-27T22:15:02.657+00:00Hi Geirhart,
No I haven't tried an oven. The...Hi Geirhart,<br /> No I haven't tried an oven. The room with my machines in is very dry and IIRC this black plastic improved over time. <br /><br />I am not sure a gas oven will dry very well as it produces steam as a combustion product.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-75551305105364674382011-12-27T09:21:34.683+00:002011-12-27T09:21:34.683+00:00Hello nophead,
Have you ever tried drying the abs...Hello nophead,<br /><br />Have you ever tried drying the abs before you extrude it.<br />Use you oven set at aprox 120F. For afew hours.<br /><br />GeirhartAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-34881358576299318002008-10-17T16:40:00.000+01:002008-10-17T16:40:00.000+01:00Hello Bert, Yes perhaps it could be trapped air; ...Hello Bert,<BR/> Yes perhaps it could be trapped air; I don't know anything about commercial extruders.<BR/><BR/>Oddly it is very apparent in the first layer of the raft, less apparent on filament extruded into the air, and seems to disappear altogether when making an object. The main difference in each case is how much the filament is stretched after leaving the nozzle.<BR/><BR/>I am left with black working fairly well but the objects are perhaps not quite as strong.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-82421250850236058902008-10-13T18:29:00.000+01:002008-10-13T18:29:00.000+01:00Hi nophead,Could the outgassing be caused by air b...Hi nophead,<BR/><BR/>Could the outgassing be caused by air bubbles trapped in the filament? <BR/><BR/>In injection molding, the pigment is often added to virgin resin right at the injection press, and although I do not know the exact ratio, I am always surprised to see how little pigment is required. Also worth noting is that the pigment comes in solid, quite large grain form (in the order of a mm) and has to be crushed and thoroughly worked into the resin by the injection screw.<BR/><BR/>If the same pigments are used to extrude 3mm filament, it would certainly require a relatively large and somewhat complex apparatus to ensure that the proper amount of properly crushed pigment would be used... far from sure that a homegrown contraption could reliably achieve this.<BR/><BR/>Perhaps, before discarding colored filament altogether, it would be wise to discuss with your supplier to find out how they do add the color, and perhaps work with them to resolve the issues (or try different suppliers).Berthttps://www.blogger.com/profile/07615427415606513157noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-87173189575376897042008-10-13T04:43:00.000+01:002008-10-13T04:43:00.000+01:00Nop: Apparently Adrian was cutting too deep into ...Nop: Apparently Adrian was cutting too deep into his PCB.<BR/><BR/>http://en.wikipedia.org/wiki/PCB_MillingForrest Higgshttps://www.blogger.com/profile/17208965471464716174noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-7342571253527290752008-10-10T19:41:00.000+01:002008-10-10T19:41:00.000+01:00Hi Erik, Yes the objects seem to come out without...Hi Erik,<BR/> Yes the objects seem to come out without extra blemishes even though the filament extruded into air has bumps on it. I don't understand why.<BR/><BR/> I don't see what difference the adhesion to the nozzle would make.<BR/><BR/>Yes I can send you some parts, send me an email detailing what you want. <BR/><BR/>I have a sample salt pot from a Stratasys and it is very impressive, much better than the Strat at Bath produces, it must be a newer model I think.<BR/><BR/>I planned to mill PCBs but I was disappointed to learn from Adrian that fibre glass will right off a milling bit making one board. You need to use SRBP. It is so cheap to get one off PCBs made these days I might not bother. Especially as I intend to move SMT and you really need a good solder mask for that.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-5018519437079962052008-10-10T16:15:00.000+01:002008-10-10T16:15:00.000+01:00"I want the controlling PCBs to be part of the gen..."I want the controlling PCBs to be part of the genotype/phenotype that people will evolve." <BR/><BR/>Working on that right now with Tommelise 2.0. I think that with Darwin, Adrian's desire to be printing circuits directly with something like Field's Metal has been getting in the way of doing something more immediately practical like milling PCB'sForrest Higgshttps://www.blogger.com/profile/17208965471464716174noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-18789166834663826862008-10-10T13:19:00.000+01:002008-10-10T13:19:00.000+01:00Hi nophead,Besides the fact that it doesn't work a...Hi nophead,<BR/><BR/>Besides the fact that it doesn't work as well as the virgin plastic, it still looks pretty nice as far as I can tell from the pictures.<BR/><BR/>Couldn't it be that, due to the dye, the adhesion to the extrusion head is different? Perhaps if you clean the orifice, sand down the head and polish it again it might become better?<BR/><BR/>I'm building a new extruder, because the old one kept failing and because I had no spare FTFE rod. I just received the new bitsfrombytes extruder and started building it. I'd like to compare the results with yours. Is it possible that you ship me some small pieces of coloured plastic for that? I'll pay for the shipping and material charges.<BR/><BR/>I'd like to compare results and photograph some of them under a USB microscope. I've made these pictures of the stratsys demo model to give you an example. Perhaps even one of you nice parts to demo at the <A HREF="http://www.wikimediaconferentie.nl/" REL="nofollow">Wikimedia conference</A> I'll be speaking at on 1st of November? I'll talk mostly about RepRap and its relationship to open source. It would be nice to show something that was actually made with an open source extruder.<BR/><BR/><A HREF="http://reprap.erikdebruijn.nl/files/Stratasys_close-ups/0100.jpg" REL="nofollow">Image 0100</A><BR/><A HREF="http://reprap.erikdebruijn.nl/files/Stratasys_close-ups/" REL="nofollow">More images...</A><BR/><BR/>Much higher resolutions are possible with this USB cam, but right now I'm sticking with the beta Linux driver for the webcam (I don't want to switch to windows just to take a few pictures). I'm already talking to the supplier about improving the Linux driver :)<BR/><BR/>When I get milling working I'm going to design a <A HREF="http://www.nanotec.de" REL="nofollow">nanotec</A> microstepping PCB that will allow us to microstep with RepRap's allowing for more positioning accuracy. The PCB has to be able to be made on RepRaps fitted with e.g. a dremel and the reaction bars that tofletcher used. I want the controlling PCBs to be part of the genotype/phenotype that people will evolve.Erik de Bruijnhttps://www.blogger.com/profile/09433438819279256757noreply@blogger.com