This might be something trivial and just something I couldn't google for simply for not knowing the proper names of the parts or mechanical functions, but here goes...
I want to be able to move a small thin plate, against another plate. Two flat surfaces against each other, one is stationary, the other is moving in X- and Y-axis. Sure, one servo for X and one for Y, but... how?
My first thought was that I needed some sort of special bearing, like a wheel, consisting of small wheels along its outer edge, freely moving in the opposite direction. But, I have no idea what they would be called or where to find them. Or if that is the "proper" solution.
Any help would be highly appreciated!