Patent ID: 8647102

Claim:
A print head assembly for use in an additive manufacturing system, the print head assembly comprising: a carriage retained by a gantry mechanism of the additive manufacturing system that is configured to move the carriage substantially in an x-y plane, wherein the carriage is configured to receive a plurality of replaceable print heads and to retain the received print heads at the same time; at least one suspension mechanism operably connected to the carriage, wherein the carriage and the at least one suspension mechanism are configured to prevent each of the received print heads from moving relative to the carriage in directions parallel to the x-y plane, while also allowing each of the received print heads to be controllably moved in a dimension outside of the x-y plane; a toggle mechanism for each received print head, which is configured to controllably move the received print head relative to the carriage substantially in the dimension outside the x-y plane; and a controller configured to independently operate the toggle mechanisms such that the toggle mechanisms controllably move the received print heads independently of each other.