A carrier head includes a housing connectable to a drive shaft to rotate therewith, a lower assembly having a substrate mounting surface, and a gimbal mechanism that connects the housing to the lower assembly to permit the lower assembly to pivot with respect to the housing about an axis substantially parallel to the polishing surface. A projection system for projecting an image based on a received video signal including optics having a corresponding resolution and a zoom control controlling a zoom of said optics. The laminated structure body has at least the at least one common ink chamber and an atmosphere communication channel which diverges from the network of ink channels. The arbiters become desynchronized under stable conditions which contributes to the switch’s high throughput characteristic.