I searched a little on linear actuators and stumbled upon this video:
This video, too.
Do you suggest me go with this solution or will there will be troubles? the actuator is controlled by the Arduino. I think that it has the strength to lift up the the parabolic solar concentrator on the horizontal axis. I thought about this solution because the solar concentrator is desired to be about 1m in width, so we would probably deal with a heavy object.
The concentrator design is given to another team and I'm responsible for making that concentrator tracking the sun automatically. I'm trying to search for different solutions from time to time and I wouldn't like to be left alone in darkness.