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Dear all,

 

For the pneumatic contest, I've built a huge robot called ''Nemesis''(from the ancient greek goddess) and I would like to

share it with you.

 

Nemesis has 22 pneumatic functions operated by a double compressor. All pneumatic valves are operated only manually according to the

competition. Has a weight of 8kg and consists of 8000 lego technic bricks.

Nemesis.jpg

Total air cylinders :

26 large

11 mini

 

The compressor uses 2 large pneumatic pumps operated by a PF XL motor.

Compressor.jpg

 

The maximum pressure that can be reached by this pneumatic system is 28 psi with fresh batteries.

 

Due to more than 30 pneumatic ''T-air pieces''pressure cannot reach a higher level because there is a huge drag and the XL motor has no power to

rotate more. The length of pneumatic tubes are between 0.5 and 1.5 meters long. Due to the large hoses, large air storage is needed because there

is a lot of air loss in the system.

 

The air of the whole system is stored inside 2 lego air tanks (although the system needed far more) :

IMG_20161021_104326.jpg

white_tank.jpg

 

The compressor has an auto-pneumatic switch using a large cylinder, which turns the air engine off when the pressure reaches 24 psi.

Switch.jpg

 

A manometer is used for showing the air pressure at any time.

IMG_20161021_104223.jpg

 

 

Functions :

 

Nemesis has 2 arms. The bigger front arm has 15 pneumatic functions and the small back arm has 5 pneumatic functions.

 

The small back arm has the following movements :

 

a) small gripper

IMG_20161021_103700.jpg

 

 

b) elbow1

IMG_20161021_103707.jpg

 

 

c) elbow2

IMG_20161021_103714.jpg

 

 

d) shoulder

IMG_20161021_103730.jpg

 

 

e) shoulder rotation

IMG_20161021_103747.jpg

 

 

 

The huge front arm has the following movements :

 

a) large gripper, operating 10 fingers independently having 2 mini cylinders each

IMG_20161021_103800.jpg



 

 

b) wrist, operating 2 functions (up-down and turning)

IMG_20161021_103922.jpg
 

IMG_20161021_104010.jpg

c) elbow

IMG_20161021_103915.jpg

 

 

d) shoulder

IMG_20161021_103909.jpg

 

e) shoulder turning

IMG_20161021_103853.jpg

 

 

 

Besides, the robot has 2 more pneumatic functions :

1) Face movement

IMG_20161026_102927.jpg

 

2) A third gripper which is mostly for fun (e.g. for scaring house cats)

Cats%20(2).jpg

 

 

Here is the video of the project :

 

 

 

Thanks for watching :classic:

 

Good luck to everyone!

 

 

Edited by Aris

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Indeed! About 100 hours, quite complicated.

Edited by Aris

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I had missed this one! Quite incredible ...

Will you submit it in the official submission thread?

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