Problems within current “RepRap” designs
IMHO, some of the current designs have lost "consistency"
Maybe because it’s an “open” project? or
Maybe its trying to do everything without any constraints?
ATM many users are using 3mm diameter feed stock filament. Many are outputting finished material via the nozzle out to the build material in the area of 2mm or less. Some of the advanced users from my reading are using various methods to achieve the 1mm finished product output.
One such method used is to stretch the output material to achieve
1mm finished product. IMHO, consistency is lost in the process.
If users are moving in the direction to process smaller, and smaller output via the nozzle hole pre treatment, or more detailed preparation of the filament before hand to make higher quality output is needed.
The consistency fix?
My thinking atm is that consistency of build quality is being achieved and processed, within the extruder (whatever type used). What would be much, much better is to achieve the consistency at the feedstock or filament level. Eliminate the variations at the nozzle output to build level. Thereby eliminate the pressure within the extruder design. Why try and squeeze 3mm feed filament in and try and out put “finished” at 1mm? Pre-process the 3mm and re-spool the filament into a standard 1mm feedstock to the extruder head. That’s a 3>1 reduction making a lighter less stressed and consistent quality extruder.
Use up dead space within “RepRap” designs.
Make available different colors and kinds of material at a twist of a knob. (have a design to put yet to paper)
Recycle I love the idea of using plastics around the house and recycle them into something else that can be used. Saw somewhere a device to take strips of soda bottles and feed it into the extruder, great idea! Ok this is design is done, now take this concept and add my idea and you have trash to 1mm feedstock ready to be used when needed.
I have about a half a dozen other ideas building off this simple concept and am sure this will open up some new doors to innovation.