tag:blogger.com,1999:blog-4339813531032979196.post8142034160385900678..comments2024-02-28T07:32:59.864+00:00Comments on HydraRaptor: Wooden overcoatnopheadhttp://www.blogger.com/profile/12801535866788103677noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-4339813531032979196.post-85802515142622485202013-03-16T14:55:17.220+00:002013-03-16T14:55:17.220+00:00Yes I run my production machines in boxes with ext...Yes I run my production machines in boxes with extraction fans.<br /><br />The natural ABS I get from reprapsource.com doesn't produce much smell compared to others I have tried. Npt sure if that means it is less toxic though.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-86813695701224648202013-03-16T12:58:11.316+00:002013-03-16T12:58:11.316+00:00Hi Nophead,
I have the same problem with wraping ...Hi Nophead,<br /><br />I have the same problem with wraping and smelling, are you still using a heated room for your printing?<br /><br />( and is not only a problem of smelling, studies carried out in the 1970s and 1980s suggested a possible increased risk of lung cancer among workers exposed to acrylonitrile. http://monographs.iarc.fr/ENG/Monographs/vol71/mono71-7.pdf ).<br /><br />Thanks for sharing.<br />Bissa Orboeahttps://www.blogger.com/profile/08520916644122723595noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-36992603699025474122011-03-12T03:29:54.053+00:002011-03-12T03:29:54.053+00:00Thats great to know! Ill have to measure my filam...Thats great to know! Ill have to measure my filament often as well as the internal diameter of the nozzles im using. It should be interesting to find out what the +/- tolerance is. Graphed out. At what point should we really think twice before trying the filament. :) <br /><br />Thanks NopHeadUnknownhttps://www.blogger.com/profile/13925667421246382931noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-87031936846895193992011-03-11T17:00:31.490+00:002011-03-11T17:00:31.490+00:00How far up it flows depends on the temperature gra...How far up it flows depends on the temperature gradient as well as the diameter. If you are getting PLA going all the way to the top perhaps the insulator is too hot at the top end. I had that problem when started using a heated bed, which is why I have a big heatsink and fan on my extruder.<br /><br />The is a limit though to the difference in barrel diameter and filament diameter. I can run the 2.8mm Makerbot ABS in my Mendel as the bore is 3.3MM IIRC. Perversely, the closer the fit the easier it is to push.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-22102467291202637212011-03-11T16:39:01.320+00:002011-03-11T16:39:01.320+00:00The problem you had with different diameter of fil...The problem you had with different diameter of filament in Makerbot ABS. I believe i have also experienced this problem with PLA. I had the PLA flow up and into the insulator and seal up the entrance. I could not heat the barrel enough to get it to flow again.<br />What do you see as a solution other than getting filament that is the right diameter? Can this be prevented?Unknownhttps://www.blogger.com/profile/13925667421246382931noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-62290555081486342262010-12-13T07:41:00.417+00:002010-12-13T07:41:00.417+00:00Stepper motors can generally handle about 100C so ...Stepper motors can generally handle about 100C so not a problem.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-14384979124850733752010-12-13T05:59:03.916+00:002010-12-13T05:59:03.916+00:00Nice work, but you are going to kill the motors qu...Nice work, but you are going to kill the motors quite fast in a chamber like that. A pity that we can't have the best of both worlds...Zachary Nahumhttps://www.blogger.com/profile/17397817718261354635noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-41543164936116709052010-11-29T07:27:24.730+00:002010-11-29T07:27:24.730+00:00I really find the blog interesting and informative...I really find the blog interesting and informative, Thanks for sharing.Architectural Models Torontohttp://www.torontoprototypes.com/noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-78592623497266167952010-06-17T17:23:02.590+01:002010-06-17T17:23:02.590+01:00I tried turning the bed off during the build. The ...I tried turning the bed off during the build. The parts come off due to contracting when doing ABS on PET.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-78509552508580223722010-06-17T17:13:12.154+01:002010-06-17T17:13:12.154+01:00"To maintain 40°C I have to leave the front o..."To maintain 40°C I have to leave the front open at the bottom. I will add some vents at the bottom of the sides to allow cool air in and perhaps use a bigger fan."<br /><br />Why not turn off the Heated Bed on that time? Maybe the heated room will make print still working ok with heated bed at lower temperature (after the start of printing, for sure).<br /><br />Maybe we can save a lot of energy with the Heated Room + Heated Bed.Casainhohttps://www.blogger.com/profile/09458423869238512900noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-86772495878341121132010-06-15T20:53:49.959+01:002010-06-15T20:53:49.959+01:00I just started a wiki page to document the heated ...I just started a wiki page to document the heated room:<br /><br />http://reprap.org/wiki/Mendel_heated_room<br /><br />Thanks for sharing, you did a great work NopHead!Casainhohttps://www.blogger.com/profile/09458423869238512900noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-65396147014921069552010-06-14T00:59:22.159+01:002010-06-14T00:59:22.159+01:00Great! So this his the heated chamber :-)
I also ...Great! So this his the heated chamber :-)<br /><br />I also had that problems when I had window open, and I use that same idea to remove the pieces, blowing cool air with the air dryer :-)<br /><br />Now we just need support material :-)Casainhohttps://www.blogger.com/profile/09458423869238512900noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-58674149553291986572010-06-13T15:58:06.572+01:002010-06-13T15:58:06.572+01:00dnaworks,
I will try to add some more detail soon ...dnaworks,<br />I will try to add some more detail soon and upload the plastic parts to Thingiverse. It is only a wooden box made from 6mm MDF, some battens, nails and glue. I actually made the mistake of not making it deep enough as I didn't realise the Mendel bed moves outside of the frame. I had to trim the bed.<br /><br />stevew,<br />Thanks for the links.<br /><br />Peter,<br />Presumably the fumes condense onto the bag. I do get tarry deposits on the metal bracket above the extruder on HydraRaptor, so perhaps that kills most of the fumes.<br /><br />I need to have ventilation in the Mendel box because it would get too hot for the electronics otherwise. A better arrangement would be to have the electronics outside.<br /><br />I suppose it could vent into the room through some sort of filter, perhaps just charcoal.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-15329463129247604972010-06-13T12:00:27.245+01:002010-06-13T12:00:27.245+01:00Hi Nophead,
I too have noticed less curling on pr...Hi Nophead,<br /><br />I too have noticed less curling on prints within an enclosed chamber versus prints made in the open air. With the acrylic makerbot-inspired design I use, it seems like the difference between a 20C ambient temperature, and the 30-40C the chamber gets just from warming up the heated table makes quite a bit of difference. This is probably especially true in the winter months.<br /><br />The lack of fumes is also super important, especially if you're running in an apartment (like me). I think I remember reading a post some time ago about enclosing a Darwin's build envelope with a temperature resistant bag to try and reduce warping -- and that by the time the print was complete and the bag was opened, there didn't appear to be any bad smells. Venting is good, but perhaps a poor man's extractor (that doesn't involve outdoor vents) is simply enclosing things and waiting for the fumes to settle. <br /><br />thanks,<br />PeterPeterhttps://www.blogger.com/profile/09748593214168860068noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-38979384195123737802010-06-13T06:05:30.681+01:002010-06-13T06:05:30.681+01:00That bed full of parts is an inspiration, a beauti...That bed full of parts is an inspiration, a beautiful thing to see. My Mendel build is complete and functional, but my knowledge of Skeinforge is incomplete and an unheated 3M #2090 bed precludes decent parts.<br /><br />I'm glad that you brought up the vapor and have created a solution for venting. The styrene monomer in ABS has effects on the central nervous system that are very nasty. It is also carcinogenic. My experience working in high concentrations of styrene vapor long before workplace safety became the norm taught me this in 1965-6. Some high school summers were spent building sailboats with polyester resins and a host of other toxic chemicals and particulates without any safety equipment. <br /><br />You can eat ABS without danger, but really don't want to breath the vapors released.<br /><br />Stratasys' own MSDS says wear a respirator, but their MSDS is rather benign. Link to the Stratasys data, 6 pages : http://redeyeondemand.com/MSDS/msdsModMat_P400ABS_0904.pdf<br /><br />The sobering MSDS is this single page, just 2 paragraphs whose address is self explanatory. I have personally experienced the symptoms listed in the second paragraphs and witnessed others people falling down. None of us want to go there. http://www.styrenemonomer.org/3.2.html<br /><br />My favorite workstation sits in my bedroom on a hand made oak desk from wood that I logged and sawed myself. The Mendel is going into a self heated box outside, just as soon as I master Skeinforge. :)stevewhttps://www.blogger.com/profile/03251417665190776140noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-28049661129529979912010-06-13T01:01:09.298+01:002010-06-13T01:01:09.298+01:00Any way that you could be convinced to post your b...Any way that you could be convinced to post your blueprints and/or BOM for the cover? Pretty please? :)dnaworkshttps://www.blogger.com/profile/10851732570488260983noreply@blogger.com