I am not afraid of anything, why would I be, to be afraid presumes some worse condition in the future based on a created imagined projected path that would lead to some future situation. Although you should not be nieve about what people are capable of. Look at the history of last few thousand years, add that to the fact that people have not changed that much in thousands of years. Then questiby Robert Eastwood - General
And a good song Final Fantasy - Listen To Your Heartby Robert Eastwood - General
Will they be researching the development of 3d printing or how to use information systems to try and thwart people getting together to discuss such idea, and sharing of such things like 3d schematics. Will they be researching ways to make it more expensive for people, and to muddy the water with inaccuracies, or will they be creating ways to replace there corporations. Currently many of my postby Robert Eastwood - General
coresnake Wrote: ------------------------------------------------------- > The Rep in RepRap is short for Replicatable. > Replicatability has been and will continue to be a > priority for some of us, whether you like it or > not. Also think on the reason for Replication. The idea is for decentralized production, at a low build material cost, so that many people can produce goods.by Robert Eastwood - General
bobc Wrote: ------------------------------------------------------- > bbriggstkd Wrote: > -------------------------------------------------- > ----- > > So you are automatically assuming that anyone > who > > wants to print a gun or gun parts is doing it > for > > evil purposes? > > Yes, guns are inherently evil. > > Next. Only a pacifist can say thby Robert Eastwood - General
Does the design rotate the threaded rods for movement along x,y,z axis? That is the functionality I am designing for the 3d printer I am building. To give resolution at 1/1000 of an inch. Each gear tooth movement would be around 1/1000 of an inch. Or 20 threads per inch using a 50 teeth gear for moving to a position. Then if the nut is snug enough to the threaded rod, it would be quite simpby Robert Eastwood - General
I heard this song again, and figured it could be a pretty good anthem for 3d Printing. Modern English - I'll Melt With You Bob Eastwood Robert Eastwood Also good for the TV show House, but that is a longer story And also part of the Oz story, but again, a longer story.by Robert Eastwood - General
destroyer2012 Wrote: ------------------------------------------------------- > I think a better solution to warping is printing > in a heated chamber. If the plastic all stays warm > until the print is done then there are very few > warping forces put on the part. I wouldn't want to > be forced to design all parts with a solid middle > layer for the flipping mechanism to fit on.by Robert Eastwood - General
nophead Wrote: ------------------------------------------------------- > I haven't tried it, but I have been told that if > you apply pressure to molten plastic with air it > tends to tunnel trough and find the exit. It needs > a piston to work I think. And the post I posted explains how to make that press system. The pressure is applied by a press in a cylinder after air is vacuuby Robert Eastwood - General
It should be noted, that process is a functional add on. If someone wanted to print an object bottom up, for small objects without warp problems, that would be possible. Or a person could print an object with connector extensions on the bottom surface, then fold down heating plate, attach product to spindle, extend legs to double height of machine for added clearance for rotating object thatby Robert Eastwood - General
Going to read that web site, I considered that would be a need for the product at some time. The plan I had for air filtration is: Two bicycle pumps running on a motorized gear, like pistons on a cam shaft, with intake of air attached to a fume tube, and output of bicycle pump attached to a bong, would make a pretty good water filtration system. Using a cheap power drill for the motor would suby Robert Eastwood - General
nophead Wrote: ------------------------------------------------------- > Sorry I missed that. Where did you post how air is > removed from commercial screw extruders? Create a vacuum to cook the plastic,that removes air before cooking, apply a press after reaching temperature that pressure being above 1 atmosphere, then open exit valve, and have back pressure on filament and there is noby Robert Eastwood - General
nophead Wrote: ------------------------------------------------------- > I don't know how the air is removed in commercial > screw extruders. When casting silicone for example > a vacuum is use to remove bubbles. I think > positive pressure would have the opposite effect. Why would you post you are unaware of how to remove air from the process after I already explained how to do thaby Robert Eastwood - General
Note also that if the flipping mechanism can be swapped in and out of where the metal heating bottom plate currently is, the product would also effectively double the printing height capability. Robert Eastwood roberteastwood@yahoo.com The heating plate made out of a piece that foldby Robert Eastwood - General
The mechanism for flipping would be something like this. the first few layers printed on a product, the middle layers, would include flipping connectors, small piece that would be cut off at end of production, that piece would fit into to thin square rods. The flipping mechanism would be a motor, attached to a long bar and that bar then is attached to a square rod to attach to product. When flby Robert Eastwood - General
To make a valve that has 1.7mm exit, and for tubes for heating and cooling copper tubes that have a 1.75mm inner diameter copper tubes can be found at these locations Copper tubes to make an extruder length to be cooled or to make the nozzle or valve probably could be found at one of these sites Or for a MacGyver approach. Put a 1.75mm filament through the middle of a few of them to increasby Robert Eastwood - General
I posted this earlier the mechanism to make pellets to filaments, or scrap to filament would be creating a hopper cooking cone and an exit point for filament. I have not prototyped it, but it should work for under a few hundred dollars. That filament would be cooled after being forced out of final 3mm or 1.75mm tube by applying pressure to the hopper that would push on the molten fluid productby Robert Eastwood - General
A system could be designed that would solve the warping issue by counter pressure. The product is initially printed, first few layers on a flat surface, that printing is not the printing of the bottom layer of the product, it is printing the middle layer of the product. After printing the middle, put the product on a spindle that will flip the product exactly 180 degrees, accuracy is importantby Robert Eastwood - General