For those saying +40 degrees is impossible

[Rodrigo Piaggio]

Ok, i made a few tests since i have a type d with old a core (just switch the cubies from an old type a).

Yes, the cube is Super smooth and fast because the old type a cubies are a bit smaller.

The cutting corner abilities are improved and the cube seems to locks less. I still don't have any pop.

I think this is a GREAT hybrid. Thanks a lot!!!

PD: Since i switch the cubies the old type a with type d cubies sucks!! haha, but who cares.....

 

[Unknown.soul]

Can you try it with your Diansheng? It should be the same thing as the screws, springs, and centers are almost the same.

 

[Samlambert]

Can you try it with your Diansheng? It should be the same thing as the screws, springs, and centers are almost the same.

I tried it and it didn't work as well.

 

[Rodrigo Piaggio]

Can you try it with your Diansheng? It should be the same thing as the screws, springs, and centers are almost the same.

Yes, i think you mean with the nº222 model, rigth? I have one of this DS with an old type a core that works great. I will try this new idea but for now i'm going to sleep (3 in the morning in my country!!)

tomorrow i will post my findings

good nigth!!!

 

[vloc15]

So, I keep hearing that cutting corners from 40 degrees and over is impossible. Well, let me prove you wrong.

Core: Old Type A
Springs: Type D
Screws: Type D
Centers: Type D
Corners: Old Type A
Edges: Old Type A

Highest tension minus 1/4 turn
Lube: Jig-A-Loo (Dissassemble, 2 full sweeps, work in for about 10 minutes.)

(Sidenote: I locked up a lot on those first N-Perms =/)

BTW, where did you order your type A from??

 

[Samlambert]

Puzzleproz

EDIT: New vid is up explaining all the mods I did to my cube.

 

[cardmagic12345]

Wait are those Old D's or what?

 

[Samlambert]

What do you mean? If you mean the screws, yes.

 

[PCwizCube]

Approximately 45 degrees? I think not. I paused the video, aligned my cube so it was exactly like yours, and was arctan 13.9/16.6 = 39.9 degrees. So... um this is kind of funny. "For those saying +40 degrees is impossible" Well guess what? You didn't do +40 degrees! OWNED LOL (And yes, 0.1 degrees matters )

 

[kickinwing2112]

how do you cut the center legs?

 

[Samlambert]

Approximately 45 degrees? I think not. I paused the video, aligned my cube so it was exactly like yours, and was arctan 13.9/16.6 = 39.9 degrees. So... um this is kind of funny. "For those saying +40 degrees is impossible" Well guess what? You didn't do +40 degrees! OWNED LOL (And yes, 0.1 degrees matters )

Sorry to tell you, but your calculations are wrong, this is pretty much 43-44 degrees.
Sidenote: Your cube isn't exactly like mine in those pictures.

 

[Odin]

Rubiks cube fan your wrong sam's hybrid is cutting at 40+ish

 

[PCwizCube]

Sorry to tell you, but your calculations are wrong, this is pretty much 43-44 degrees.
Sidenote: Your cube isn't exactly like mine in those pictures.

Ok, I admit that the picture was a tiny bit off. How do you know it's 43-44? Please actually prove to me it's that, with statistics. I would show you my ruler measures but my camera is way too blurry...

EDIT: Re-did calculation (like 4 times), it is over 40 degrees, but not 43-44. It is arctan 14.8/15.9 = 42.94 degrees. And if you actually calculate it yourself, I'm pretty sure you would get close to that range. Make sure you're measuring where the cube touches the surface, not the rounded part of each piece. Also, when you go from the starting point of the ruler you have to look over the cube directly overhead so you can see the starting line of the ruler touch the corner piece accurately.

EDIT: After better calculations it seems to be around 41-42, I believe I could get 43 if I really tried.

Can you please show all of your work?

 

[Samlambert]

EDIT: After better calculations it seems to be around 41-42, I believe I could get 43 if I really tried.

Can you please show all of your work?

I didn't calculate at first, I just looked at it and it looked like 43-44 degrees to me. Then I changed it so it would fit your calculations but if you tell me your calculations were wrong then I'll stay with my first impression, 43-44 degrees. I was just actually too lazy to calculate. I guess I'll do the calculations and see for myself.

 

[PCwizCube]

I didn't calculate at first, I just looked at it and it looked like 43-44 degrees to me. Then I changed it so it would fit your calculations but if you tell me your calculations were wrong then I'll stay with my first impression, 43-44 degrees.

After recalculating like 4 times, I'm pretty sure it's approximately 42.94 degrees, not approximately 45 degrees (what you first said in the video).

Whatever, I'm tired of this. Can we end this conversation? You proved me wrong, 3x3 cubes can cut corners at more than 40 degrees angle. Congratulations, be happy about that. Let's just go with that your cube can cut corners 42.5-43.5 degrees. That is amazing, be happy with that. Now, seriously, I'm getting tired, lets end this.

 

[Odin]

no! lets not end this i want to see the exact angle it can cut before i buy a type D to make this! i dont want it to be approximately 45 degrees!

 

[PCwizCube]

no! lets not end this i want to see the exact angle it can cut before i buy a type D to make this! i dont want it to be approximately 45 degrees!

If you really want to know go do what I did. Copy SamLamert's cube exactly and measure it yourself. Whatever SamLamert says, I'm not going to do anything more.

 

[Samlambert]

Ok, so after trying about 10 times with almost always the same results, I get arctan 16.1/14.8. This is the maximum my cube can go, if anyone asks for it I can give some proofs (video with calculations in it then showing it can cut corners from that angle). I don't know how to calculate degrees with that but the results are 16.1/14.8

EDIT: Got it calculated, once again, this is the MAXIMUM, and it wont always work, maybe 3 times out of 5, also, I need to apply some force so it works.

Result: 47.40809 degrees.

 

[PCwizCube]

(Currently doing calculations to know how much degrees exactly my cube allows for corner cutting. Will edit. The results will be very precise.)

If you want it to be EXTREMELY precise then you would have to do it on all the corners of the cube, on all angles of the corners. Then you would average those.

 

[fanwuq]

Woah! That's crazy! How did you make it so that when you pull R' down it always do U, not U'?
I had a cube that was also very loose (didn't calculate degrees, but it was more like 25 because when it gets that loose, it tends to lock up. When it was at a speedcubing tension, it was something like 28-31. No point in arguing over 1 or 2 degrees, it's just weird. I sure can't cube with something like that.
Like Vulosity said, the cube just overspins way to easily.
I had a type D before, but I never tried this test on it.
The center piece was spinning as if it was springless (the springs were not putting any pressure on the pieces.) In that case, my cubes always lock up.
What's your secret of no lock ups? And you must have quite amazing turning precision to not over spin it. If I have a cube that cuts corners that crazily, I'd actually put in some anti-lube to slow it down so it is more controllable.
If you have such amazing turning precision, why not just use a tight cube?
Corner cutting is not the only thing too look for in a cube. I know that cube is not for me. I like controllable cubes that I can sub-1 the U-perm on, I dislike any cube that turns more than a single quarter turn too easily.