I got the Ikea SKARSTA desk http://www.ikea.com/us/en/catalog/products/S49084965/, it's a sit stand desk that uses a manual shaft to rise and lower the desk.
So I plan to make the desk motorized using a satellite dish motor and a satellite positionner to control the motor (I removed the linear actuator part and kept only the motor).
I looked into pulley systems and cogs but couldn't find suitable pieces, please advise.
Update Jul 9:
The problem is how to transmit the rotation from the motor (green) to shaft (orange), motor can be placed at any position relative to table top but shaft isn't.