US Patent 9108360 Gantry assembly for use in additive manufacturing system

A gantry assembly for use in an additive manufacturing system, the gantry assembly comprising a first bearing shaft, a carriage slidably engaged with the first bearing shaft, and a second bearing shaft operably supported by the carriage, the second linear bearing extending along a second axis. The gantry assembly also comprises a tool-head mount slidably engaged with the second linear bearing, a drive belt secured to the tool-head mount, a first motor having a first drive shaft engaged with the drive belt, and a second motor having a second drive shaft engaged with the drive belt.