ADDITIVE MANUFACTURING DEVICE, COMPOSITE PROCESSING DEVICE, CONTROL METHOD FOR ADDITIVE MANUFACTURING DEVICE, AND CONTROL PROGRAM FOR ADDITIVE MANUFACTURING DEVICE

An additive manufacturing apparatus includes a powder feeder, a head, a first flow passage, a flow passage switching valve, a reservoir tank, and a second flow passage. The powder feeder is configured to feed powder using a carrier gas. The head is configured to discharge the powder. The first flow passage is for supplying the powder from the powder feeder to the head. The flow passage switching valve is disposed in a middle of the first flow passage. The reservoir tank is configured to receive the powder fed from the powder feeder. The second flow passage connects the flow passage switching valve to the reservoir tank. The second flow passage is for feeding the powder from the powder feeder to the reservoir tank. The flow passage switching valve is capable of alternatively selecting whether to supply the powder from the powder feeder to the head or to the reservoir tank. The first sensor is disposed in the first flow passage between the flow passage switching valve and the head and is configured to detect a first flow rate of the powder flowing to the head. The second sensor is disposed in the second flow passage and is configured to detect a second flow rate of the powder flowing to the reservoir tank.