Polymaker Hook Tournament: Round 3 Part 1/2

[@Polymaker]

EDIT: 1:30 Winner: Jonas Holtermann We apologize for the inconvenience.

[@jxavier3876]

Lmao

[@Benisued]

5:17 hey! thats not fair, a lot of them slid of the hook while this one had a close loop holding it

[@luckylarry5112]

I just seen on twitter an explanation of what appeared to be damage early on to the hook I still think it would be a good idea to implement shackles in the round 4. I also played the 6:13 clip back on KZbin's slow mo at least 50 times and finally caught the last frame and could see white stress riser appear to the right of the metal hook just before the explosion. Good call Polymaker, from our end it's tough seeing what you are seeing there live! I don't know about the rest of you guys, but I am learning a ton from others designs! Thank you Polymaker

[@BeowulfNode]

I see what you mean, using the comma and full stop keys on the keyboard for youtube frame by frame playback I see the white stress mark just on the right edge of where the bottom metal hook attaches to the bottom contender. However this is also likely due to the friction created by the failing metal hook rubbing across the layer lines in a slicing motion as the metal hook failed. I still think that one was ambiguous, and could have played out differently if the metal was strong enough to not deform so much.

[@andrewluchenbach]

I feel like we may see more results like 6:10 in the future. The metal hooks are bending and sliding off.

[@twinturbostang]

1:30: The wrong hook was declared winner. Should be Jonas Holtermann (teal hook on top).

[@JJFX-]

RIP... nice work CCC. If I was Melchior3DPrints or Drenth Engineering, I'd be confused and a bit frustrated right now. These S Hooks are a more of a variable than I think anyone expected.

[@Drenth_Engineering]

Indeed, and if a design doesn't fit the S hoek it should be disqualified

[@santiagoblandon3022]

I think what failed on Jago Strong-Wright vs Melchior3DPrints was the metal hook, but the camera didn't take the frame at the exact moment =/ what do you think?

[@BrianBartlow]

Yeah, the s-hook definitely failed in that battle. I'm hoping Polymaker redid the battle with the u-bolts and coupling nuts (5:15) to verify the winner.

[@GatorGlider]

Agreed. That should be a rematch or draw.

[@3dprintingscience528]

They posted a picture on twitter, Melchior3DPrints broke before the metal hook.

[@santiagoblandon3022]

@@3dprintingscience528 Awesome! Thanks :D

[@JJFX-]

@@3dprintingscience528 Ahh ok that makes more sense. The Drenth Engineering round is a tough call though.

[@Drenth_Engineering]

I lost from armor australia but it doesn't seem fair if he can't even fit the S hooks. If for example the S-hook would have bend open, a hook like armor australia may have yielded before mine did.

[@Johan-ul9jb]

Maybe they changed to other hooks because the s hooks were failing? Take it as a compliment ;).

[@Drenth_Engineering]

@@Johan-ul9jb if that was the reason of not using the S hook then why did the use the S hook on other designs?

[@Johan-ul9jb]

@@Drenth_Engineering im just guessing here.. maybe they just didnt need it yet.. who knows

[@Bordpie]

@@Johan-ul9jb Yeah, where the S hooks don't fail before the plastic ones they just use them as normal. When the S hooks fail they turn to other hooks such as closed shackle. As long as they fit the original S hook and they don't rely on the S hook shape to function it's fine. The test is the strength of the plastic hook, not the metal one, otherwise the person who happened to get the slightly weaker S hook joined to it would lose and it would be nothing to do with the contestants hook design. I'm surprised the battle where the S hook completely bent (any bending is unacceptable really) was allowed. I got an email from polymaker to send the STL of my hook across because they essentially want to weld closed the S hook over my design since it relies on the S hook shape, and they wanted to print some of my design off to practice so they don't accidently melt my hook.

[@gasparigi]

Armor Australia is some spiral hook? Where is it opened? It looks they didn't finished a started battle, but changed metal hooks to chain links. Strange

[@NotAnRCExpert]

It looks, you are not pulling with constant speed, but manually. Constant speed should be applied.

[@3dprintingscience528]

This is how a tensile strength machine is designed, I think they use the constant speed until it breaks, the machine is supposed to sense when it breaks and stop, then I guess they manually pull as the rule said that it is either completely breaks or let go.

[@jonathanbarger2493]

Everywhere_Differentiable is my next opponent, if i can make it past that I think I'm shot in round 5 going up against Spiral Link. Kicking myself for not making some obvious improvements to my hook. I found out about the competition a week before they needed sent out lol. I'll be ready next time!

[@prxrb]

It’s me! ED! Yeah I’m kicking myself for not doing a spiral too

[@jonathanbarger2493]

@@prxrb hey man! Yeah I dunno, I don't think I would do a spiral next time. Jury is still out on if it's the strongest design as they have yet to go against a really strong hook.

[@prxrb]

@@jonathanbarger2493 what are your reservations? The only design that looks to me like it could beat the spiral is raise 3d’s self locking one. I haven’t tested the spiral though, so I’m not sure how it fails

[@jonathanbarger2493]

@@prxrb good battle sir! I personally think sendit hook is going to be the strongest.

[@jxavier3876]

@@jonathanbarger2493 in late but nguess it’s going to be ccc

[@rynnjacobs8601]

At 6:13 none of the prints seems to be broken, not even if looking at single frames. (youtube-dl and mpv, navigating with “.” and “,”) As far as I can see, the lower metal hook bend open and slipped off.

[@3dprintingscience528]

They sent a picture on twitter showing that the lower hook broke before the metal hook slipped off.

[@GatorGlider]

This is getting interesting now that the failure point seems to be moving towards how the competitors hook is able to better capture the s hook. Are bent hooks replaced between matches?

[@santiagoblandon3022]

Idk, they did use U hooks in one match. I imagine that the hooks that only work with S hooks will be in trouble

[@angelhassan5944]

@@santiagoblandon3022 maybe with thick steel wire rope arrangements?

[@luckylarry5112]

If there's any compromise in their metal hook it's no longer about material capabilities or design...

[@santiagoblandon3022]

@@angelhassan5944 not sure.. there are hooks that only work with the metal hooks like #send_it_hook that relies on the stiffness of the metal hooks to prevent it from turning or other hooks that have already failed but just for illustration.... Andy or Anken which had a perfect fit for the metal hooks and there wouldn't be a reasonable way to wrap a cable around 😕 Idk what's gonna happen. Polymaker has it tough

[@santiagoblandon3022]

@@luckylarry5112 what's your hook? Just out of curiosity ^^'

[@andipelamine]

From now on, it seems we will see less metal hooks and more metal links between the contenders, getting further away from the initial rules...