candle wax is lighter than water so the question remains: will your plastic sink or swim. also wax wets most materials very well so the question is: will plastic bond together in a wet environment. try it out and tell usby r2kordmaa - Plastic Extruder Working Group
controlling individual atoms isnt as easy as it seems they dont work in a pick and place principle exactly. anywho for a starters design you would need like lots of metal tiny metal rounds. that would be costing i think. better go with the more widely used welding/soldering methods and adapt them for reprap use i think. of course if you can get or fab these metal balls yourself why not try it outby r2kordmaa - Plastic Extruder Working Group
im from estonia not finland but i havent found any place here to buy hdpe here so i would be interested in a few weeks(when my darwin is assembled) wow i think i finally found a place that makes that stuff, waiting for them to reply. will tell you results if i get it cheaper than you do guess i'll be needing hdpe from finland afterallby r2kordmaa - Finnish RepRap User Group
what purpose would it serve in a reprap? altho technically possible it seems like going through a lot of trouble for a very simple task. so heres my question, whats the point?by r2kordmaa - Controllers
well although i think its not mechanically too hard a task i remain skeptical about the usefulness of it. i think a support material will do much better job than liquid.by r2kordmaa - Plastic Extruder Working Group
fabulous putting darwin in a box and filling it with mig isnt hard eighter. it will take some time till i have my own darwin and i probably wont get my hands on welding psu in no time soon so im afraid unless someone takes the lead and tries it out it will just remain a theory. btw i think the troube is: filling the hole is one thing, building a object layer by layer is smth else im especially coby r2kordmaa - Plastic Extruder Working Group
well 1kw+ lasers are smth you wont build yourself and if you buy one you'll prolly end up poor. around 100W co2 laser can be built at home and you dont really need such scanning speed. anyway thats hardly this threads discussion, rather the idea is if you could use arc welding to print, note that pauses in printing to cool down the detail are probably necessary.by r2kordmaa - Plastic Extruder Working Group
hmmzzz.... i must note that buying all aurdino electronics from reprap store is actually cheaper than buying all components and putting the system together by yourself. damn right now purchasing the parts is behind the fact that my debet card doesnt comply with paypal and i have to make a credit card if i want to use paypal to order stuff from online storesby r2kordmaa - Reprappers
hmmzzz... half as dense as mercury its still really heavy to have a pool of it. it might even rip the detail off the bottom and it might end up floating in it. also i think it might be quite expensive stuff. but yeah you can probably print plastic in it better than water/oil anywayby r2kordmaa - Plastic Extruder Working Group
yeah well thats just controlling the robot movements, software issue. im rather afraid there might be some harder difficulties to face like extreme inaccuracy due to molten steel freely running around for a while before cooling down or smth like that one must remember that in printing material isnt always deposited on level surface but edges aswell where it might drip offby r2kordmaa - Plastic Extruder Working Group
heh patents pending... yeah good luck patenting that lol. anyway its just a simple linear motor on a pcb. you just make the tracks in the shape of coils. it wont have much force behind it i suspect, compared to conventional linear motors where you have lot more coils. its can be built with reprap ofcourse but i doubt it would have any use in reprap machine due to the lack of powerby r2kordmaa - Plastic Extruder Working Group
189$ for this is a robbery its just a old cd writer laser + power you can make one yourself basically good for party tricks as mentioned earlierby r2kordmaa - Laser Cutter Working Group
put sone of the nicrome wire on the dome nut aswell and solder the pencil tip on to the nut with plenty of lead that helps with heat conductivity so the tip is warm aswellby r2kordmaa - Plastic Extruder Working Group
woulndt it heat up all the metals around it like bolts and nuts and steel rods and motors not only the extruder barrel beware with that thing or you'll end up having one molter darwin. induction heating is usually used in high temp metal melting im not really so sure if its the best solution for a 3d printerby r2kordmaa - Plastic Extruder Working Group
well basically you need some liquid that doesnt wet the plastic and apart from mercury im out of ideas water and especially oil wont work imho. plastic just wont bond together. feel free to try it out i could always be wrong but imho the idea has little futureby r2kordmaa - Plastic Extruder Working Group
10-100 watts a weak laser? hardly 100W laser is already smth that cuts steel, anyway i don't really care if that solution is used in commercial 3d printers. the thing is that it can be used for 3d printing. anyway I'm planning to look into that idea, gotta ask from some professional welder if the idea is feasible. if someone has extensive welding experience now is the time to shine with your knowby r2kordmaa - Plastic Extruder Working Group