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Had it running for about an hour today with my home-made take up unit. I managed to produce quite a pile of scrap filament. See pic. I need to rework the barrel and screw setup into one piece. The two separate halves are not perfectly aligned and cause a slight binding when the screw turns. This makes the plastic pulse ever so slightly and makes the line thick and thin as it runs.
Loren
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Loren
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Paste Extrusion Working Group
Could work if I had something like that after a take up unit that sized it to begin with. As the extruded material comes out of the nozzle it is so weak that it takes barely any tension to change the thickness. That might change once I get the proper material to begin with.
I will post a video once I get it running good - not sure if this site will allow a quick video (size wise) but ill fig
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Loren
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Paste Extrusion Working Group
I doubt it. Its for making the filament for the printers not for the printer itself. I have changed it to a hydraulic motor and switched over to heater bands with a proper controller now. I ran some abs and hdpe yesterday. It seems to be working good now. Today I plan on building the cooling tank and the take off unit that pulls the plastic rod to make it the proper diameter. The winder is
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Loren
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Paste Extrusion Working Group
Whoops just noticed I posted that in the paste extrusion forum. If a moderator could please move the topic to the appropriate location please ..
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Loren
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Paste Extrusion Working Group
Hello all. I just found this 3d printing stuff by accident last week when surfing for something to do on the hack a day website. It got me interested right away and I would like to build a reprap for myself. I have plastics processing training from a college and worked in injection molding for about 7 years running a shop before I decided to try something new. So I have a working knowledge o
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Loren
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Paste Extrusion Working Group
I just started looking into this reprap stuff so I may be out to lunch here. Would a hypodermic needle work for this? I checked here :
It looks like there are several id's one could work with. I would expect most people could get access to these locally too. If the length is too long you could probably cut them somehow.
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Loren
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General
There are literally thousands of different grades of each family of plastic. Take Polyethylene for example. From this you can get:
high density (pe-hd)
medium density (pe-md)
low density (pe-ld)
linear low density (pe-lld)
ultra high molecular weight (pe-uhmw)
Now there are grades of pe made for different processes such as roto molding, injection molding, extrusion, blow molding, casting, etc
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Loren
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Polymer Working Group