Measure Rubik's Cube Torque 2

[lhenke]

Hi All,

I'm looking for suggestions on how to measure the force required to rotate the layer of a Rubik's cube. I'd like to get pretty precise feedback on how the force varies as the layer is being turned. I assume I need to buy or build some kind of motorized torque meter, but most of what I'm seeing online is expensive and designed to deal with more torque than I need.

I'd prefer to hack something together with a sensor and a microcontroller, but any thoughts would be appreciated.

 

[IRstuff]

So why not hack something with an Arduino and gyro?

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529 Entire Forum list

http://www.eng-tips.com/forumlist.cfm

 

[itsmoked]

Figure out how to do it with small motors and the requisite gear train then measure the motor current. Calibrate the system with a scale prior to using it.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[TheTick]

If only there was some sort of wrench... that could measure torque... a torque wrench, as it were...

 

[MintJulep]

Why would you need a motor?

Load cell. $7.00

https://www.robotshop.com/en/100g-micro-load-cell.html

Rotary encoder. $6.59

https://www.amazon.com/Maxmoral-Enc...01&hvtargid=aud-643574997066:pla-634614360951

 

[kjoiner]

As The Tick mentioned, I would get a dial torque wrench in small units such as in-lb (or smaller). Make an adapter that can grip the perimeter of one layer of the cube and start taking measurements.

Kyle

 

[handleman]

This sounds like a question for forum1528

 

[drawoh]

lhenke,

How about a ruler and a fish (weighing) scale?

--
JHG

 

[BUGGAR]

Some Rubik Cubes have detents to hold there positions. You will have to measure the torque to overcome this. I suppose you could consider this your static friction force and add it to your moving friction force.

 

[kjoiner]

Is it for this?

https://www.youtube.com/watch?v=xCoH2AORcEQ