filament extruder a la jeff

Hey JDM Check out the new thread shredder a la Jeff moved it there as I want to keep this one on the filament extruder

 

Well I am gonna keep that link if mine blows up completely

roughly as far as cost this is what I am looking at
motor shipping 80
pid 30
heater 22
misc parts 50
printed part ???
===============
182 +???

 

More parts came in guys check out the pics above

 

Well I have not picked up that part yet that. I was having some issues with the shaft size I have several that I am looking at, it gets very confusing as to torque and speed so it is a slow process. I have been talking with the guy who put together the second extruder above and he was not happy with the motor he chose, so I became concerned, he had an extremely SLOW extrusion rate. Then last night I thought about it and this is what I came up with.

The motor is the only real unknown and the most expensive about $80 everything else should work. But does it? I don't know, but I can simulate the motor for now with a power drill and put everything else together. The drill would also have a variable speed built right in. Of course this is all temporary. IF that all works the way I expect it to I can add the motor in last and in the mean time still have a working extruder. So that is my new plan or I should say my revised plan.

I have to order my PID which is about $30 so when that gets here I can start prototyping a working assembly.

But to answer your question if I can here is the link to the motors I currently have under scrutiny.

http://www.stepperonline.com/gear-101-spur-gearbox-for-high-torque-nema-23-stepper-motor-p-116.html
http://www.stepperonline.com/gear-201-spur-gearbox-for-high-torque-nema-23-stepper-motor-p-117.html

Again I am not sure of how either should work with regard to overall extrusion rate so......

 

The problem actually occurs with two aspects from what I have heard there is the speed AND the torque from what I understand a simple gravity feed would not work as there is not enough pressure to actually extrude you may get a drip if you get the material molten enough, but to extrude you need pressure and when the speed changes so does the torque.

The drill idea was mainly to get me actually operating while I determined the best motor

Like projects have you seen my idea for the shredder a la Jeff under projects (conceptual at this point) I did get some dowels pins so almost conceptual...

 

In the instructions they had for the cleaner extruder the guy mentioned using a rugged motor controller that was an add-on to an arduino board so if you have an Arduino UNO board The extra board was 25 bucks

 

That was my plan anyway

 

Got the heat shield plastic in today and actually started cutting it down and for got to take pics so the cut pieces are shown above and then as part of the assembly. Check it out above

 

Mine also has a gap bigger than I was hoping for. Two thing I noted during my little process of putting it together and taking it apart for pics and such is that when it leaves the first pipe going into the flange where the heat shield goes there is also a vary large gap just because of the way the bottom of the flange is concave where the threads are going into the heat shield and then back into the other flange another gap. in fact anywhere the metal screws into another piece there is a gap as well. The coupler has it also so hopefully these gaps will still allow it to work
The blue area is where I see gaps the lightly shaded are on the right has the potential of being molten if not definitely warmed and the brighter yellow is highly probably molten and as you can see the are gaps throughout what this means I am not sure but they are working devices using the same material with the similar gaps especially around the flange areas so I can only hope.
Also in your second image notice the thickness of that "pipe" that was definitely machined so the gap would probably be taken out in that case.

 

Well I don't think the Lyman extruder falls into that category and this one is based on the same components the gaps I show in my image may be less depending on the nuances of the auger but the flange part is identical and it has been duplicated several times and is completely successful. My concept was to reduce any machined parts to other sources or ideas but these specific pieces were not changed so I still have hope for mine.

 

it probably could I have no idea I am new to arduino than you didn't even know about the arduino mico or mini the link he gave did however show an arduino uno and this board was stacked on top I can get you the link if you want.

 

getting things put together check out the new pics just under the starting post