subject: storage and retrieval system [print this page] The automatic storage and retrieval system machine also includes a generally vertical mast on the base, and a carriage supported on the mast by additional linear slides that slide along one or more rods extending vertically along the mast. The automatic storage and retrieval system machine is provided with an onboard motor to move the carriage up and down the mast. An extendable and retractable shuttle or extractor mechanism is provided on the carriage and is operable to move objects on and off the carriage.