Well Nate, hope you are home now and all is well :D, I was still having trouble with my hotend :(, filament cooling off in the peek rod or seizing up in it :(, so I was thinking I would have to drill out the filament entrance end of the peek and install ptfe to keep the filament from seizing up :), then I found this,
this is exactly what they did, I was right :P, needless to say I don't have any ptfe :(, I will order some and install it into your hotends, once this is done, I will ship them to you, I hope you will understand, I want to be fully confident that the hotends will work for you before I ship them out, I am sorry for the delay Nate.
No problem at all.:cool: I'm gone away every week from now to Christmas. You got all the time you need.:D I'm going to do as much as I can on weekends, but I don't really think I'm going to get much done on the new printer till the last week of the year.
I see what ya mean about drilling out the entrance. What is the advantage of the PTFE over PEEK? Do you think any changes in dimensions are needed if 1.75 mm filament is used in the future?
Ya Nate, I just ordered 3' of 3/8" diameter ptfe from small parts.com :)
, when I receive it, I will be making you an insert for both sizes of filament, all you would have to do would be to change out the inserted ptfe to the size of filament you want to use :D
. Also, the ptfe has a kind of lubricating quality about it, things do not bond to it easily, like filament, so, this being the case, I think the filament will not get stuck to it like it does to the peek [the problem I have been having] :cool:
. I just drilled the holes in the extruder nozzles by hand :huh:
, orifices are .34 mm, # 80 drill bit, they came out good, I can hardly blow though them, they should work well for fine resolution :cool:
. The barrels, I machined in such a way so as to seal them selves inside the extruder nozzles when I screwed them in, this worked as well, they do hold pressure, so as not to leak filament between the threads :cool:
, the peek holds the same pressure, this is important when extruding plastic correctly. The hotend elements are then screwed onto the barrels with heat sink paste on the treads and between the extruder nozzles and the elements, there should not be any concerns of a cold nozzle. I think you will have some good hotends when all is said and done, at least I hope so.:P