hey all,I'm trying to create a miniature version (less balls) of this just because it looks cool:http://www.youtube.com/watch?v=hlx-M53dC7M&feature=relatedIt looks like they attach string to a ball and then this gets moved up or down on the y axis. Together they create a 3d object.I thought about stepper motor to move the balls up and down accurately but they are expensive especially as i would need loads so thats out of the question!!I then thought of modding some mini servos to have 360 rotation but can't work out if i will be able to still maintain accuracy needed to postion the ball correctly?
Then i thought about standard dc motors with a gearing system and B&W sensors so that as the motor turns it can detect repeating blocks of white and black to detect where it is but thats a little to complicated!
Anyway i was wondering if anyone had any ideas on the accuracy of modded servos? can i still position it accurately? Or does this sound like a stepper motor job?