CC9: Crane

My crane was made in the shape of a tower. It has in the top a set of pulleys that help
distribute better the load. Also the hook has a set of pulleys. The crane motor is
connected to the string reel trough a worm gear and a 24t gear giving a reduction of 1:24.
The crane works like an elevator. There is a touch sensor that detects that the load was
lifted 30 cm (1 foot), then it triggers a second motor that moves the whole tower
horizontally another 30 cm. A second touch sensor is activated at the end of the rack
road and the load is lowered back in the new spot.

I was able to lift 3.6 kilograms (7.92 pounds approx)... I didn't have time to test if I
could do more... I also didn't want to crash the crane again... :)

It took 9:49 minutes to complete the lifting, transport and lowering. I accelerated the
video 6x.

Hope my english is understandable, if not, hope the video and the pictures help you
understand better the crane I made.

Raforz