Id welcome a diagram as well (cheers Woody!!) but having just had a quick glimpse on Technobots, Im toying with the idea of getting a Dimension Engineering Syren 10 Motor Controller (http://www.technobots.co.uk/acatalog/Online_Catalogue_Dimension_Engineering_Controllers _34.htmlhttp://www.technobots.co.uk/acatalog...gineering_Cont rollers_34.html) to control the linear actuator since, as far as Im aware, its a relatively low current-drawing actuator (2A I was told when I bought it) and that controller adds up to a similar cost to the Robbe Duo unit plus relays.

So I might give the motor controller a try and see how it performs

EDIT: Any luck getting an actuator for your crusher yet Alex?

(Message edited by K_C_R on November 07, 2007)