WEEK 5: COMPUTER CONTROLLED MACHINING

 

 

The idea was to use the shopbot to make something big.

 

Again, I got some inspiration from my 1 year old Bostonian nephew. Soon he will be running and, even though he is American, I want to make sure he starts enjoying the beauties of real football, the one you play with your foot and a ball (obvious?).

 

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For that I decided to build a penalty kick trainer that consists of a kid size goal and a pendulum type moving goal keeper. That way he can start enjoying the game, even alone.

 

First of all I got a better idea of the dimensions by drawing full scale on a white board. Then I moved the sketch to solidworks, designing both the goal structure and the goalie. The structure is a snap fit.

 

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I saved the files in dxf format and took them to the shopbot. I rearranged the parts to minimize the use of OSB. There were two types of paths: the offset path for the features of the goalie and the cut part for the rest. So I had to change the tool in the middle, as I wanted the features to be sharper (1/8ÕÕ tool).

 

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The process went smooth and the snap fit was almost perfect. Most of the connections were press fitted, with the exception of a couple due to the not constant thickness of the OSB.

 

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I added a bearing in the goalies head, in order to minimize the friction of the pendulum.

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I also tried integrating a poncho I used one of these rainy days to create a net, but I did not like the result.

 

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The final result, ready for my nephew«s birthday:

 

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ANDÉ FIRST PENALTIES AGAINST MR GOALIE!

 

http://www.youtube.com/watch?v=ielRGyZe3Yc&feature=youtu.be