i can quite understand why twin shafts are needed. looking at the pics only the front shaft is used?by moonspud - Reprappers
i remember as a kid my parents getting me a broken photocopier to pull apart.. for what i remember it had some large steppers in it. if you went to a copier repair place they should have some dead machines to get rid ofby moonspud - Reprappers
i've cast my first successful part!! using easy cast resin and painting the mould with clear laquer and the coating it with silicone spray. the pic attached is this first part in it's raw form. it is very rough becuase i reused the same mould i used for the plaster attempts which wasn't in the best condition. but this was a proof of concept cast to see if this idea would even work.. the dags havby moonspud - Reprappers
mimarob Wrote: ------------------------------------------------------- > Feeling extremly stupid, but then again I never > where any good with 3-d problems... > > Which part are you trying to make? are you making > a negative? > > Is it one of the extruder parts on: > > > ? it's the motor holder, part B in that pic. if this works it will come out of the mould a uby moonspud - Reprappers
i've build a test mould of this. i used plaster of paris (still waiting for my resin to come) to test the mould but it stuck to the mould and broke up trying to get it out... for my second attempt i sprayed the mould with silcone spray, it still did the same thing. any ideas? would the resin not stick as bad or be strong enough to be extracted with out breaking?by moonspud - Reprappers
using autocad and pulling the dimentions from AOI.(on that note does anyone know an easy way to get a dimention from AOI? i'm currently drawing a box or sphere next to the mesurement i want and using the sizes from it) my idea behind these is that anyone around the world can build these without access to the orignal parts using common woodworking toolsby moonspud - Reprappers
helps if i attach the file....by moonspud - Reprappers
Ok this is just the start of what i'm working of making moulds for resin casting. Starting with the offset motor holder on the extruder. Please check it out and let me know if you think this can work. I belive i can make nearly all the printed parts using this and other methods These instructions and Plans are still being worked on. just wanna get some feedback before i get too far ahead. basiby moonspud - Reprappers
k thanks for the info guys. more food for thought. sorry forest didn't the p you off just thought it would be easier to get info from ppl who have hands on experience rather than technical data specs. but i will google first next timeby moonspud - Reprappers
Forrest Higgs Wrote: ------------------------------------------------------- > HDPE's melting point runs in the vicinity of 135C. > I extrude it at about 180-190C. In that range > it has about the consistency of white toothpaste. Does it keep getting softer the hotter it gets? at what point does it break down or burn?by moonspud - Reprappers
what temp do they start to go to a molten state?by moonspud - Reprappers
One of my possible designs should work with the current extruder controls and software. thats if dot printing even works and my ideas work... Now all i gotta do is build a standard working machine first. On that note i've been fooling around with templates to make wooden molds for pouring resin to make Darwin's parts. with little woodworking skills. Would other people be interested in these? otby moonspud - Reprappers
Has any one tried messing around with dot (or blob) printing of objects? along the lines of a inkjet printer? shotting small dots of plastic or possibly something else to form layers of the object instead of using a stream. I have a few ideas on some fairly low tech and easyish to make methods of doing this. How do comercial high cost units do it? dots or streams? What is the molten temp of sayby moonspud - Reprappers
So Do 1.8 deg Motors work? are are of these any good?by moonspud - Mechanics
cool will have to save my pennys and get some of these. Barry have you got a working machine?by moonspud - General
I may be being dense here but if it can make the extruder parts why can't it make the rest?by moonspud - General
Thanks for the motor info, i'll look into that a bit later (it sunday arvo my brain isn't quite working at full speed). what do you mean by in can't self replicate yet? i realise that it can't make everything but from all i've read on the wiki it seems to be a functional machine. Is it not able to print it's plastic parts? P.S. Sebastien where in oz are you?by moonspud - General
Hi all, Love the project and i want to get involved. A couple of questions, Has Anyone in australia (preferably Victoria) got a working unit that they could print me the required parts? Does Anyone know where in australia to get some suitable stepper motors and a approx cost? Thanks guysby moonspud - General