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?).
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.
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).
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.
I added a bearing in the goalies head, in
order to minimize the friction of the pendulum.
I also tried integrating a poncho I used one
of these rainy days to create a net, but I did not like the result.
The final result, ready for my nephew«s
birthday:
ANDÉ FIRST PENALTIES AGAINST MR GOALIE!
http://www.youtube.com/watch?v=ielRGyZe3Yc&feature=youtu.be