Lets also not forget, any cats in the room will be highly affected.by Simba - General
I think it is a very innovative idea - for example the use of saltwater and sound ports. However, the presentation could be misleading to those who never worked with photopolymers. Also when you build up a system on some many systems that are individually questionable, the end result will be disappointing. Also, I'm personally annoyed that it was advertised as $100 when the real price is aboutby Simba - General
These were really really cool prints I want to try. Saw them at Maker Faire 2013 NYC. Does anyone recognize them / have a link? Thanks!by Simba - General
NormandC Wrote: ------------------------------------------------------- > I don't think that's Simba's problem, Optimist. > > The OBJ file is a posable character, which means > it's composed of a group of separate and > independant meshes (basically one for each member) > and he wants to fuse them all and get a single > manifold mesh. > > I know there's a way to do thby Simba - General
Hi Everyone, I'm trying to print an OBJ file (which has multiple facets - because it was designed as a posable character) but I can't because of too many independent meshes. Is there a software that can just produce a single mesh? I haven't had luck with meshlab ever (always gives the same types of non-manifold errors and such).by Simba - General
Thanks for your interest. Please send your resume to us at info@armanicreations.com Will we see you at the Maker Faire NYC?by Simba - Hello. I need a something designed. For money.
Apparently I lie... I'm so proud I could even find this ...so much happens in a yearby Simba - Developers
Hi, I am sorry I don't that extruder anymore but I would still use it if build speed and strength are a value to you. Let me know what problem you're having exactly and I think I can help. Basically, the non-intuitive aspect was realizing that per pass the nozzle adjustment is only a factor of two (1mm vs .5) not the factor of 2^2 you may be thinking to compensate for filament flow out of aby Simba - Developers
VDX Wrote: ------------------------------------------------------- > ... the problem defining the 'safety'-level is > caused by the big amount of potential harmfull > additives and 'optimizers' not listed in the > receipe Hi Guys, PLEASE read my commentary: don't eat from unknown plastics, uncertified surfaces, and uncertified geometries. This is serious stuff. The stuff that eby Simba - General
So the big question for users of porous tapes - what keeps the tape from coming off? the sticky layer on the backside?by Simba - General
actually the vast vast majority of plastics aren't mixable. They would maintain two seperate layers. For example, laywood is 40% wood in polymer binder (like polyethylene wax). That means one part, cellulose, one part polymer. In this case, the powder would be Kapton (40%). You could drive off the PLA with high temps. Therefore you create a printable PLA that wouldn't stick to iteself well (by Simba - Developers
do you think it is possible to add powdered kapton to PLA to achieve the same effect?by Simba - Developers
Makes sense to me. I think the polyimide is intended to be spotted as a film for MEMS processing, i.e., 10 or 50 micron layers probably is pushing it in terms of film evaporation rates and peeling/cracking I do love this idea, but i noted a flaw. Without a sticky support, your printed layers would warp (just like printing on cold kapton) so you wouldn't be able to do some features.by Simba - Developers
To this day, I will never understand why 3Dp and CNC are so different. The technologies are identical. 3DP needs an extra drive extruder motor, and thermistor, and CNC doesnt. But the similarities are staggering - computer control of gcode. One big output - reprap needs a big heater, and CNC needs a big router head. A fan and nozzle heater add a little more. But why is the directions ofby Simba - Developers
Sounds to me like you have an ideal system. Thermistors differ from actual filament temperature easily by 10's of degrees. This wouldn't worry me, unless you are asking about analog input conversion accuracy issues (that is also within the equivalent of 1-2 degC). And accuracy gets worse with increasing temperature for NTC thermistors, I think.by Simba - General
< has never been able to print threads sorryby Simba - General
Wow, sorry i missed that diagram before. I totally reinvented the wheel! Funny thing is, i landed at the top of that page several times for the navier-stokes equations Someday, these will be a textbooks sir. Can you point me to your design specs for the fan-free all metal hot end? Or was that the picture earlier in the thread that looks like a scifi laser gun head with many baffles?by Simba - General
nophead Wrote: ------------------------------------------------------- > Yes I am not disagreeing that a short transition > is desirable for accurate flow rate, just > questioning whether springiness of the plug is an > issue. The fact its length changes with flow rate > will create some volumetric errors, how much > depends on how close fitting the bore is. Hi Nophead, and Saby Simba - General
Hey Sanjay, thanks for your reply. Out of curiousity, does your stainless nozzle have a taper to eliminate the filament "heat creep" buldging jams, or is it just very highly polished on the inside?by Simba - General
frankly, lets say you could sell a metal printer. Would you really want to? Is the world ready for it? ITs kinda crazy to think about the 3d printed gun issue....And believe me, I think it is really impractical, today.. but it will be more feasible soon and without the regulation of bullets we could face a government shutdown due to basic misinformation / paranoia Also, what about the warp isby Simba - General
What I'm trying to say is, you have the ability to make fantastic organic work, but because it is hard to draw in 3D most prototype work is made out of squares and circles in cad or sketchup. Whether you like angular/square designs or organic is totally individual decorating preferences and a la mode design - but now that we have 3D printers I see more squares and less curvy designs, and what Iby Simba - General
Oh my god this thing is so realistic and cool. 26 motors and 3d printed (objet-style?) parts to make a tarantula. I forsee a larger one being made with Decapedeby Simba - Developers
Also just wanted to point out that even in the construction of skyscrappers, the cement engineer has to manually validate each batch, and will frequently through out entire batches. Where the sand came from, on what day, how much water was in it before...it all affects structural integrity. So its one thing to build it and say it worked, vs. building something that will stand up to code, and foby Simba - General
AndreyR Wrote: ------------------------------------------------------- > 3D Cement Printer > > > I am prototyping a cement printer. So far, I have > the first version. It’s 1/3 of full scale and > the major In case no one pointed it out (sorry I didn't real the whole thread), there is a professor who has a ted talk on 3d printers and has already extruded about fist-sized trby Simba - General
Yes. How would we push carbon fiber? The idea of fiber reinforcing plastic as you print takes real unique advantage of reprap has to offer. 40% fiber filled is an idea for injection moulding. With reprep, we may be able to do 60%, in a layer by layer approach. In fact, i frequently place hot-nozzles that i test on glass or carbon fiber as insulation, and find the plastic makes it clear throby Simba - General
I love this idea save for the magic step of a carbon fiber extruder. How will this work?by Simba - General
Looks like the ones on the prusa that I had. Should be fine, but it will need a smooth extruder with a bearing and hobbed bolt of small diameter to ensure there is enough force - or a gear based wades extruder will work too. You won't need to redo anything after.by Simba - General
1) Swap for DRV8825 will get you a reliable closer to 2A 2) There are tons of stepper choices out there. The whole idea behind current control using stepstick is to be able to run high voltage through low-voltage low-current motors without upping the current (so they turn faster with reasonable torque). A 2.5A motor may be huge and not intended for this purpose (i.e. it is rated 12V instead ofby Simba - General
No, it is not PLA. Because the wood burns above 200C, they had to extrude in a polymer base that can work with lower temperature (or get a black brittle product). So the carrier could be something like PP, or PE. It is certainly made of some kind of "wood flour". They may even be using the same masterbatch from the companies using it for making plastic-wood decking and such. Those would beby Simba - General
We tried 30% and 40% long fiber glass filled nylon and PU. Its a disaster. Don't do it, or you will clog any nozzle and back it up for miles. Its like hair drying to go down a drain, just ugly, messy. Even if it extrudes, it comes out looking like a strange spider web of fibers. Its best to think of the fibers and being shard of rigid material in a nearly-liquid medium. So if you overheatby Simba - General