Patent ID: 8912479

Claim:
A sensing system for a media presenter including a carriage moveable forwards and backwards along a linear presenter track between a first purge position, a stacking position, and a present position, the sensing system comprising: an inductive sensor mounted on a central track portion and extending on either side of the stacking position so that a position of the moveable carriage can be ascertained as the moveable carriage approaches the stacking position from either the forward or backward direction; a resonant target mounted on the moveable carriage for co-operating with the inductive sensor to provide positioning information about the target relative to the inductive sensor; an optical sensor mounted on the moveable carriage in the vicinity of the presenter track; a first purge target having a first optical property and mounted on the presenter track in the vicinity of the first purge position so that when the optical sensor detects the purge target the moveable carriage is aligned correctly for transferring media items carried thereby into an entrance of a purge bin; and a present target having a second optical property and mounted on the presenter track in the vicinity of the present position so that when the optical sensor detects the present target the moveable carriage is aligned correctly for presenting media items to a customer.