We DESTROYED a $300 HOTEND 

Would you guys want to see us slice a Slice Engineering hotend? Let us know! Any other crazy ideas for projects?

The intensity in Coopers eyes as he prepares for destruction.

For anyone wondering, the reason aluminum (t6 hardened) needs to be quenched to be workable is because T6 aluminum gains its strength and hardness from small precipitates that form in the crystal as it slowly cools. Cooling it quickly prevents these precipitates from forming, as the now evenly distributed solute (not-Al) atoms don't have time to come together again, therefore it's much softer.

Cut it all! Great content and real life example of EDM capabilities

Great job on this video! I met you at RMRRF this year! Very cool! Hope to be able to chat again sometime soon. Your table was very busy!

Super fun and informative! For someone who is not too techy, this video was very entertaining and kept my interest! Shared with my boss, he said they are in trouble with me, since my son makes robots! 😅💥💖 Nice job!

Hey nice format, I like these videos. You have a great personality :) I can see a bright RU-vid career for you in one of the timelines :)

So sick dude, I can't wait to get my hands on one of these

Now do the goliath hotend.

Part of the striations are due to the resistance changes from the different thickness and materials. Some of it is tension since you don't have an active tension system to compensate for the wire elongation and lack a despoiling motor to remove the inconsistent resistance and weight of the spool from the equation. Also your flushing pressure, combined with flow turbulence will be moving the wire about. That is a big part of why you would normally do a rough cut and then finish skims in industrial machines. I would agree that lack of a second wire guide combined with the run out of the bearing is not helping matters either. Love the progress you guys are making, just a long way to go to catch up with industrial machines.

Did you take any courses on presentation or performing? Cuz you're a natural

RIP to the chube

Great production quality

Now wire EDM a positron in half......we dare you! In all seriousness, we would love to see our hot end cut in half!

Insanely good presentation, audio is bit low though, should probably bump that up next time!

Ive got 1 super crazy idea! Lets mount hotend with a FLAT piece of aluminium not to the side, but to the top of 2020, and then push filament by hand, obviously. And 2nd version with feet for OF 😅

What about that EDM machine?

How long did it take to cut out this part? I'm thinking about buying a wire EDM machine, but I'm inexperienced with the cutting speed

What striations are you talking about at @11:35 ? It seems like you’re pointing to the threads of the copper insert in the video.

You mentioned that the ASA got pretty hot and burned a bit in the hotend, is the heating pretty uneven or concentrated in one part of the hotend?

The 1980s elevator music is a bit much.

"science" ? Ha, more like reverse engeener Xp , thanks

What is that jacket I want it. lol @rackrobotics