Why in the world does the quote system on this forum look like something from a newsgroup when you can use the [ quote][ /quote] by hand? Seems the quote button should work like every other forum on the planet but it doesn't and that has a lot of users aggravated/agitated about it plus it makes the forums look pretty archaic and rank amateurish (we need neither for a burgeoning technology/paradigby Dark Alchemist - Administration, Announcements, Policy
nophead Wrote: ------------------------------------------------------- > You need to get rid of the PTFE if you want to go > to higher temperatures as it goes soft much above > 250C. > > The way to do it is by using a stainless steel > tube with a thin wall as an insulator. To get > round the fact it is not slippery it needs an > outwards taper to act like a mould draft aby Dark Alchemist - General
Yeah, I am trying to figure out how to support the hot end and the PTFE liner. I need something that can handle those newer temps.by Dark Alchemist - General
I found some nice Nylon I want to use but the largest filament size is 1.2mm and I am wondering how low can we go with the stuff that is out there? What would I need to change to go smaller? I have seem filaments go down below .5mm which is what I would use if I were using a .1mm head but I digress. Any ideas and frankly 1.2mm Nylon I can get a five pound spool ~1645 meters for 52 US dollars wby Dark Alchemist - General
MacAleJam Wrote: ------------------------------------------------------- > With: > mass = 1kg > Diameter = 0.003 m > Density = 1240 kg / m^3 > > The formula would become Length = 1 kg / ( > 1240kgm^-3 * 3.14159265 * ( 0.003m / 2 )^2 ) = > 114.0895649404 metres, as Weedz has pointed out. > > For Coils around Spool > The Figure below shows a cross section of a spoby Dark Alchemist - General
I see where I screwed up it was because I forgot to negative cube the 1240.by Dark Alchemist - General
ttsalo Wrote: ------------------------------------------------------- > Dark Alchemist Wrote: > -------------------------------------------------- > ----- > > The pressure is easily handled but is the build > > time simply because we need to slow down to > allow > > the plastic to harden before it runs or is > there > > another reason? > > No, the preby Dark Alchemist - General
Yeah, cool beans cause all of the formulas I found the missing part of the equation is how many wraps per layer and how many layers. Ahem, isn't that easily figured via math? that link made my head swim. Hmmmm, could you check this formula? 1kg 3D Printer PLA Filament 3mm. PLA is 1240 kg/m3 diameter of the filament is .003m mass is 1kg pi is 3.1415926535897 and I came up with 0.02928701by Dark Alchemist - General
Lost me. Density for PLA is 1.23 - 1.25 g/cm³ and the volume is what? The problem is that none give you the dimensions of the spools. :/by Dark Alchemist - General
Supposedly it is for speed of melting since there isn't as much mass to melt and the fact that you can have a lighter stepper motor. There must be a reason that all of the named machines are moving over to 1.75mm but all of the reasons I don't know. Found this by accident:by Dark Alchemist - General
and I could not find the answer. How many feet/meters in a pound/kg of 1.75mm and 3mm filament of the various kinds?by Dark Alchemist - General
Go for a .35 or a .4 and 1.75mm filament as most are converting over to it for various reasons. I use, and am comfortable, with Cinema4D but I still can't see how blender, or c4d, or Maya, or w/e 3d app, can do the exact measurements like Autocad, et. al., can. If I could stick with my C4D, or you Blender, that helps from have to relearn everything that you are comfortable with but, as I said,by Dark Alchemist - General
Tempered Glass is really not that much more (safety glass is that stuff used in cars that has tiny metal wires in it and is bloody expensive) than standard glass and if it breaks it doesn't cut you but breaks into tiny little squares. Tempered glass is what they use in oven doors, for instance, so it can take the heat and is stronger than glass due to having to cook it (once cooked it can't be cby Dark Alchemist - General
When I said safety I meant tempered glass.by Dark Alchemist - General
I have a local shop that orders to Atlanta and gets my glass back in 2 or 3 days. It is Safety glass and they will cut to fit and that stuff is strong as it gets plus it handles heat really well (I know up to 425f at least). A tad expensive but not overly as a 3'x4' 1/8" was 80 dollars (was my screen door that the wind blew and shattered the glass 2 years ago). A little 9"x9" (23cmx23cm) wouldby Dark Alchemist - General
Well, it was funny but I saw a BBC program where they made an entire bike (except the innertube and rubber wheel) from the powder and while it was rickety it was the first item like that. Those are the things that will change the world for the better when you can pop in a plan and 2 hours later have a full sized bike ready to assemble and ride. So, in less than 3 hours you just made yourself aby Dark Alchemist - General
QuotePolygonhellFWIW most commercial 3D printers are MUCH slower than what people run here. The ones that use the powder and the laser to create the items are way faster and make parts that look like they were injected molded and neither of those two things have we achieved with our "squirting" technology. I figure it is like chiseling out knife and fork with a stone chisel and one that is craftby Dark Alchemist - General
I just see the commercial printers being used to control but regardless what most around here cares or not I have a much greater drive for the world. My wish is that the world simply implodes and people get control of their own destinies. Reprap could be that but not with the slipshod way it is being done. Look at Linux and when it was in the hands of we hackers we didn't care (I didn't nor anby Dark Alchemist - General
nophead Wrote: ------------------------------------------------------- > The dampers affect low speed and mid band > resonance, they wont have a significant effect at > high speed because the steps become smooth simply > because they are too fast for the load and rotor > inertia to respond. > > Step resonance is much reduced by using micro > stepping and isn't what prevenby Dark Alchemist - General
I was not amused by the response I received from the manufacturer but here is the quote they gave me: Price at Qty 1-9pc for NEMA 17 and 23 dampers would be: NEMA 17 Damper - $25.00/ea NEMA 23 Damper - $34.00/eaby Dark Alchemist - General
I bet you are right but every little bit helps but now to figure out how to help the X/Y. One thing I will say, going back to my first thread, is that if this is to ever leave our hands and enter into Jane and Joe sixpack hands and take off it has to be faster. In this day and age of going green to see someone having to leave motors, computers, etc... running all night to complete one project iby Dark Alchemist - General
akhlut Wrote: ------------------------------------------------------- > Sounds like a great idea! But at $15 each they > double the price of each motor, and leaves me only > 2mm of shaft with a front mount damper. Maybe a > stepper with dual shafts and a rear mount damper? > That would be nice. > > But does a reprap really *need* these? We're not > running these motorby Dark Alchemist - General
I see they finally got these puppies in Honestly I think for a 3d printer/cnc these are a must.by Dark Alchemist - General
Yep, that is what I thought for the CNC and a Reprap. Now what is funny is I have seen a .45 degrees popping up more as of late like this Nema 23 edit: Someone asked me on one of the other threads I posted on why I want Nema 23 and I forgot to mentionby Dark Alchemist - General
NewPerfection Wrote: ------------------------------------------------------- > There's no reason you can't go with a super small > nozzle diameter, just be aware of the drawbacks. > > 0.9 degree steppers may make a difference, though > I'm not sure how noticeable it would be. If you > can get them for a similar price, then go for it. That I can but for my cnc everyone told meby Dark Alchemist - General
posted while I replying so will stick in here:NewPerfection Wrote: ------------------------------------------------------- > Dark Alchemist Wrote: > -------------------------------------------------- > ----- > > The pressure is easily handled but is the build > > time simply because we need to slow down to > allow > > the plastic to harden before it runs or is > tby Dark Alchemist - General
NewPerfection Wrote: ------------------------------------------------------- > The problem is that not only does a smaller > orifice increase build time for the same feed > rate, it also requires exponentially higher > extrusion pressures. 0.1mm orifices are > impractical. Basically anything smaller than > 0.25mm is not useful except for printing very tiny > objects. >by Dark Alchemist - General
Well, I was hoping to see a very very fine one but the best I could find is the .28 I linked. I guess I see why people are chomping at the bit, errr hot end, for 0.1mm orifice because they don't exist and as I said less than 0.28 I couldn't find anything on Google when I was searching. edit: Dunno why I kept saying .5 when I had found .28mm so I corrected both posts.by Dark Alchemist - General
I don't think PWM does much to anything on a TEC but I swear I read someone doing that for something non 3d printer related. This might help you so search around the site ->by Dark Alchemist - General
.28mm Hot end tip Found this but how good is .28 and is there a smaller orifice for higher resolution printing?by Dark Alchemist - General