Sariel.pl

Simple crane. Features two sections controlled by linear actuators, extendable final section and linear clutch.

Datasheet:

Completion date: 31/08/2008
Power: electric (Power Functions)
Dimensions:  unknown
Weight: 0.74 kg
Suspension: none
Motors: 4 x PF Medium

A simple construction designed to test new Power Functions elements, such as linear actuators and switches. I wanted to gain some experience with actuators in particular, and to test various solutions of transferring the drive between a motor and an actuator along the crane’s arm.

The crane is able to rotate through 360 degrees, and lift approx. 0.25 kg. The steering is quite precise, thanks to the actuators. The motors at the back of the turntable are set at angle, in order to keep the universal joints that transfer drive from these motors from bending to much. As you know, universal joints don’t work properly when bent by more than 45 degrees. There is a single linear clutch of my design used to transfer the drive of the crane’s extendable section. As for the other motor, I relied on the internal clutch of the linear actuators.

Photos:

Video: