After the thermistor popped out of the hot-end, it promptly got hot enough to come apart. It’s a j-end with a PEEK cooling tower.
How hard, do ya suppose, would it be to just use the nozzle and make an all-metal hot end? I can turn a heat-sink, and there’s already a fan wired in to the head for cooling…
Just as my ABS prints were starting to come together, too. Grrrr.
Any clue on the thread-pitch of the nozzle? Any gotchas like ‘Once ABS gets hot enough, it carbonizes in the nozzle, rendering it useless’ before I embark on [yet another] project?
Just get as much PEEK off of the treads as you can and toss the brass nozzle into an acetone bath.
Awesome! I have Acetone! Finally, something I don’t have to source a gallon of, only to throw away 99% of it!
I’ve tried to get PEEK off before, its a nightmare. I don’t think Acetone will do it. It’ll help to clean the ABS out of the nozzle though.
I’d just buy a new hot end, e3d is popular. Be careful though, all metal can melt too:
https://plus.google.com/photos?pid=5974004693408949298&oid=100451185275381957540
The picture didn’t come through…but I can imagine. Those resistors must put out a crazy amount of heat.
I got the Hot End apart, and I must have caught it in time. The PEEK unscrewed and left no residue. And while a replacement Cold end is $22 plus shipping, I started looking at @Liam_Jackson 's link, dug around in the garage, and found some equivalent sized Brass billet…So, for the price of a tap ($3), I’m going to try making an all-metal extruder. I’ll keep you informed.
https://drive.google.com/file/d/0B09sUvvteXCBdHcyQzN5cTRRWUE
Unfortunately, no. I was only gone about 10 minutes (the amount of time to throw on a Cubmaster Uniform and come back down stairs…at that point, the location of the thermistor was registering 70C and it was clearly hotter ‘at the scene of the crime’
