I've been at this for some time, following noophead, Q'bd, etc. Basically, when you push filament through a hotend, it goes from solid, to tacky, to honey in consistency. During this transition, it goes from low friction to ultra-high friction to low friction again. As a result, pushing on a tacky, half-melted region of plastic causes the forces to go sideways instead of out, and you end up wby Simba - General
Building everything out of metal isn't a substitute for good design. You can still have vibration, noise, and low rigidity, lack of straightness, or loss of consistency due to issues with metal. I think the only advantage of metal is that it "feels" like it is stronger. CubeX is a giant frosted acrylic frame isn't it?by Simba - General
How about using steam pressure in the sealed bag (Water vapor pressure rise with temperature), either as a metering system for keeping the internal pressure the same, or pushing up the layer of polymer predictable (as if on an inflating ballon)by Simba - General
mikefiatx19 Wrote: ------------------------------------------------------- > Sorry guys, I know that this is a personal > preference type thing but do you really believe > for two minutes that putting the NC licence rather > than GPL on any of the creations in this community > would stop the Chinese putting it on Ebay? Good > luck trying to enforce that in China. You might be &by Simba - General
frontier204 Wrote: ------------------------------------------------------- > A lot of the Sainsmart stuff is fulfilled by > Amazon (so it ships from a domestic warehouse with > Amazon.ca's usual shipping times). I notice all of > the filament is like that as well as some of the > electronic kits. Just search Sainsmart and filter > by "Free super saver shipping" to see what is &gby Simba - General
Just a basic knowledge in the field > more aimed at other things than PTFE (i extrude delrin on PTFE) : Decomposition of halogenated polymers and phenolic resins may also be accelerated when they are in contact with TPE at processing temperatures. Thoroughly purge processing equipment with polyolefin polymers, including polypropylene, when using the same equipment to process TPE and acby Simba - General
DaveS Wrote: ------------------------------------------------------- > Hi all,.. > > here's a thing. > I was printing earlier today and while waiting > for an upload (I always set my bed to hot, then > kick off the upload, it uploads while the bed > heats, saves me messing about removing / inserting > SD cards) > > I wanted to brush a few bits off my kapton tapeby Simba - General
MattMoses Wrote: ------------------------------------------------------- > Simba, have you tried making, say, an > electromagnet using your iron filament as the > core? I've tried using iron-filled epoxy for > actuator tests and it didn't work very well... > Results > here. > > Also, while you're making new filament materials, > how about piezoelectric PVDF? > Automby Simba - General
Hello Everyone, We are making a new product line which includes never before seen thermochromic colors and temperatures. The pigments, embedded throughout PLA, allow you to print a material that changes color according to temperature. This also means that your prints have this property. The filaments are a drop in replacement for 1.75mm PLA in Makerbot, Afinia, Up!, Solidoodle, and Reprap priby Simba - General
DeuxVis Wrote: ------------------------------------------------------- > Jeez, iron filled plastic filament ? What is the > size/concentration of the iron particles embedded > in the plastic ? > > I wonder how fast it will erode/enlarge the > nozzles... > > Actually this news deserves its own topic to get > discussed, did you make one anywhere already ? Yes. The firby Simba - General
I've always thought 3D printers would become more EPIC with the creation of two materials: Conductive and magnetically attracted. Allowing us to make, say, a $2 electric screw driver. While a 3D printed motor will not be as powerful as a neo-dynium based motor with copper, necessarily, it would be cheap as hell and have a high power/weight ratio, and can be easily geared (like a cheap DC motoby Simba - General
Yes, but we need more information to help you. Can you make a video? When you extrude, a blob should not form, a thin line of ~0.5mm thick filament should extrude like spaghettiby Simba - General
Stainless is not really "Stainless." There are grades, and only experts know there difference. 201 = cheapest grade, less chrome nickel 304 = "18/8" steel. Good enough for most uses, a cheaper 316 essentially 316 = molybdenum added, better for medical use 500's = Casings you would see in a heater cartridge that only goes up to about 400-500 degC. (more oxidation resistant) 201 will oxide easby Simba - General
redsalamander Wrote: ------------------------------------------------------- > Ok I have to vent about this. > > It took almost 6 months and I presume enough > potential controversy in the US to have the > episode shot in London but there is was. He > quickly printed a plastic gun shot his wife and > disolved the gun in accetone in a few minutes > before the cops showedby Simba - General
From a company standpoint, experience is quantized and discrete (10 employees with half of the skills each does synergize to make one good freelancer, and vice versa). Some of those people that work on your open source projects have been working for Nasa for 20+ years and would not only be unobtainable for help to a company from a monetary standpoint, but would also not want to work for them.by Simba - General
billyzelsnack Wrote: ------------------------------------------------------- > In my household there is an ongoing joke of often > (at least daily) saying to my wife, "I had a new > idea." That's the part where she can just stop > listening and I talk AT her for 5 minutes. Oh that's funny, that's how I am with all my friends in addition, my significant/other is always listening to meby Simba - General
Ideas ARE worthless, and emergent, and I think it is ridiculous to think you can own them. Many people came to me with a great idea and I said "Wonderful, now how to you plan to execute in a way that will bring the product to market successfully, have it be user friendly, and in a cost efficient manner?" By the time it is built, the product is completely different than you originally expected.by Simba - General
Traumflug Wrote: > > Finding a well accepted way to embed commercial > interests into open source might be a good way to > speed up development even more. Well, maybe we > have it already, if with some hiccups, like the > existence of RepRap copy shops. Any idea how we can start that? I feel like I can admit to you guys that I've kept good ideas secret at times. I keep seby Simba - General
How do you prove a not? The burdeon of proof is on anyone in a court of law accusing someone else, not the other way.by Simba - General
rylangrayston Wrote: ------------------------------------------------------- > Please PM me This is exactly the kind of thinking and suport I need to stick to my word. PM me so I can give you my phone number. Okay. Will be glad if I can contribute.by Simba - General
Hi Rylan, One thing I've been learning is that as a STOCK corp (c-corp, s-corp) you are legally obligated to look out for the interests of your shareholders. In otherwords, if they deem your actions not in their best interests (i.e., not going closed) then they can give you the boot (under some specific conditions). So...best not to go that route. If you set up your company as a privately helby Simba - General
Thanks for the awesome info Matt, and good feedbacks from everyone else too. I spent about $40,000 so far on reprap projects, hiring people to help me make new electronics and materials, because I love the innovation of this field, but don't have the time or knowledge to do it myself. I have a 9-5 job too : ). My hope is, by providing a unified project leadership (as a company) that I can setby Simba - General
If the PLA is good, you won't have to change any setting. That is, if the PLA has a high melt flow and comes out velvety smooth rather than brittle and glassy.by Simba - General
I think this is a good example of where open source does fail. For example, If we had a money-pool and could fund a full time freelancer or employee then we could commission an slicer for 6 axis printers, and not have to waitby Simba - General
Well you inspired me to write a long story about how my experiences with the community is shaping my views on the whole patent or not issue.by Simba - General
It's late into the night, I'm getting really philosophical, and things are coming to a head with my internal struggle about intellectual property (IP), the community. What does it all means for the next generation, and what does it tell us about the human psyche. I hoping one of you can relate and help me think about what to do about it. The community (reprap and makers) are pretty unique whenby Simba - General
You know the scariest thing about all this, is how we'll look back in 5-10 years and joke about printer resolution of the day, and take for granted super high resolution, ultra consumable 3D home printers of the day. ... I jest (after looking at junior veloso's prints and how earlier he was - too early perhaps).by Simba - General
RBisping Wrote: ------------------------------------------------------- > yes, i do mean sticking to the tank rather than > the build plate. Im aware that several methouds of > preventing tank adhesion have been utilized but > having a thin layer of water for the resin to > float on still has a bit of promise. if the part is floating on a layer of water then wouldn't float away?by Simba - General
RBisping Wrote: ------------------------------------------------------- > while I do plan on supporting this kickstarter it > has also given me ideas for my DLP project to > correct the printed part from adhering to the > glass projection suface. The B9 uses a moving > platen to prevent adhesion but this makes me think > of adding 1/16" or so of water under the resin. > thereby Simba - General
MattMoses Wrote: ------------------------------------------------------- > The first one is a variant of > Modern > Elements by > mrul > e. Thanks!by Simba - General