More then 4 weeks ...

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More then 4 weeks ...

Post by rsfoto »

... gave me time to work ...

Hi,

... on a homework.

A friend has the idea that he wants to play chess with a Robotic arm and so the project was born.

After 4 weeks eg. started August 10th the hardware is more or less finished and the testing of the motors has started in order to see how they behave especially in regard to the torque ...

Here is the result of 4 weeks designing and testing and printing parts ... The chess board was made by another friend and BTW it is the first one he makes ... :shock:

Now comes the hard part for my friend :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: who wants to program it ...

Thanks for looking and still cloudy here ...


NHSA_Robo_v2.jpg
NHSA_Robo_v2.jpg (612.78 KiB) Viewed 1051 times
NHSA_Robo_v3.jpg
NHSA_Robo_v3.jpg (466.98 KiB) Viewed 1051 times
NHSA_Robo_v4.jpg
NHSA_Robo_v4.jpg (435.14 KiB) Viewed 1051 times
NHSA_Robo_v5.jpg
NHSA_Robo_v5.jpg (457 KiB) Viewed 1051 times
NHSA_Robo_v6.jpg
NHSA_Robo_v6.jpg (323.94 KiB) Viewed 1051 times
NHSA_Robo_v7.jpg
NHSA_Robo_v7.jpg (318.85 KiB) Viewed 1051 times

and here some videos of first motor test and the 3 finger gripper







regards Rainer

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San Luis Potosi Mexico

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Re: More then 4 weeks ...

Post by JochenM »

Very cool :cool:

Definitely keep us updated once it's programmed and fully functional; would love to see it.


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Re: More then 4 weeks ...

Post by Montana »

Well done Rainer :hamster: are you going to be controlling it as an AI chess player or are you operating the arm to play for you?

Alexandra


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Re: More then 4 weeks ...

Post by rsfoto »

Montana wrote: Sat Sep 10, 2022 2:13 pm Well done Rainer :hamster: are you going to be controlling it as an AI chess player or are you operating the arm to play for you?

Alexandra
Hi,

That is a question for my friend who is the programmer and so far he told me that he wants the arm to make the movements directed by a chess engine like Stockfish or whatever he has in mind so more or less AI :shock:

I am just the mechanical developer. The second motor tests went well so far. The positional repeatability is quite good judged by eye and some limit switches which I still need to connect. I will do some test by just lighting up some LED's connected to the switches. Need to decide if full step or microstepping. Microstepping is nice but brings problems in regard to torque which means also stopping at the same point every time.

Thanks for looking


regards Rainer

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Re: More then 4 weeks ...

Post by Radon86 »

Hi Rainer,

Fascinating project.
My challenge to you, is to enable the robot to play rapid chess or even better, blitz chess !!!

I think it should be relatively easy to program the moves from 1 square to another. Its the speed and accuracy and not dropping the pieces. The alternative is to just ask the human to move the pieces !!!

Most people would concentrate on the chess engine - computing the moves.

Magnus


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Re: More then 4 weeks ...

Post by rsfoto »

Moderators please tell me if this is not off topic here Thanks


Hi Magnus,
I think it should be relatively easy to program the moves from 1 square to another.
Have you thought about that ?

This is a 3D dimensional movement.

Turret = left to right and right to left = yes, just define the angle = steps for every field from A1 to H8 equals to 64 angles Piece of cake

Shoulder/Elbow is a SIN(angle) of the distance necessary to Elbow and then another SIN(angle) or COS(angle) or TAN(angle to Elbow/Wrist :shock:

3D_calculations_chess.jpg
3D_calculations_chess.jpg (1.1 MiB) Viewed 1003 times

Think about it ... and look at this interesting video ... minute 2:32




regards Rainer

Observatorio Real de 14
San Luis Potosi Mexico

North 22° West 101°
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