I HAVE 1.75mm PEEK FILAMENT TO PLAY WITH. Time to rig up a thermocouple for 400C nozzle temperatures, the high power heated bed for 200C bed temps, and have a crack and printing this stuff.
Then I’m going to print myself a J-Head.
Avec @Joshua_Rowley
Please be safe when printing this. We need you around.
Awesome! Where don you get that stuff? I wanna play!
Has may suit on stand-by,
Brook
#Octoprint lets you control your printer from a safe distance.
Right, now to build the test bunker underground in the back yard.
Brook
@Thomas_Sanladerer Yup, proper extraction etc absolutely vital. However PEEK is surprisingly not terribly dangerous in terms of fumes etc. This is why they use it so extensively in aircraft. Even if you burn it the fumes/smoke is pretty inert.
@Brook_Drumm had it made to order for this specific purpose. I had to order a few KG to make it worthwhile for everyone involved. So I’ll put it up on our site for sale soon in 250g spools or similar. Maybe also some 20m sample packs for people that want to play.
Well, this is taking the Rep-Rap idea to a whole new level!
Wondering what kind of funky heat sink shapes you could print. #HelloKittyHotEnd
@Sanjay_Mortimer can you let me know when you put that up? They have been wanting to test PEEK at work for a while now.
@Joe_Spanier Yeah I should get it up on the site this week. Just check the filaments section!
Eeeek! I hope you’re not taking aluminum to those temps!
The aluminum wouldn’t get that hot. The stainless steel and brass would.
@Brook_Drumm , the heater blocks on v5 and v6 are aluminum. v5 is spec’d as 6082 and I would assume that v6 is similar… I work with semiconductor process chambers and have seen first hand that aluminum doesn’t like getting much hotter than 400C. You might even say that it loses it’s temper! … besides, there are plenty of good copper alloys (naval brass?) that would hold up better at higher temps and be similar enough to aluminum in machining and thermal conductivity.
…I couldn’t resist that annealing joke…
You might even find the brass works perceptably better… But also take up tool marking easier…
Many types of brass are actually harder than aluminum, especially the 6xxx series. It all depends on the alloy and temper.
You know your metal!! Our metal hotend does have nichrome wire wrapped around an aluminum spool or bobbin so your point is well taken. The bobbin is insulated with ceramic. The heat break is stainless and the tip is brass. I am only thinking of doing in house tests, not recommending people try this at all. 
not on the site yet?