Well, honestly, i had to study more on the mechanism as i only have the rough idea & sketch on paper. my idea was to made something like tis:
http://www.modeproducts.com/products/deluxe_features.php"
but that product use only man power and my aim was tried to make it become electrical powered...
so, did u managed to make the thing works?
becoz i also doing a project of can crusher with rack and pinion. I need some advise and info on the motor u used. can u share with me?