I'm trying to make a buggy that adheres to a steel wall using an electromagnet. The problem is that the buggy needs to move along some tracks. With an air gap, we're not getting enough force, and without one, the friction is too much and the buggy can't move. Anyone know a way to get around this? I was considering making special shoes with rollers on them, but I'm not sure if I won't just have the same problem again.
There's an air gap of ~1.5mm with the current setup, and the electromagnet is a bi-polar 4x1" magnet, if this helps for some project scope. Thanks!