A mobile carriage system includes a frame supported by a surface, a drive shaft that extends along the frame and drives a drive wheel to move the frame along the surface, and a guide track that extends along the surface and has an elevated track portion. The drive wheel supports the frame and rolls along the surface, and a guide wheel rides along the elevated track portion. The drive wheel is fixedly secured onto the drive shaft and is rotatable by the drive shaft. The guide wheel is also mounted onto the drive shaft but is freely rotatable on the drive shaft, with the drive wheel having a smaller diameter than the drive wheel.