Patent ID: 9415547
Filing Date: 2016-08-16
CPC Classification: B29C,B33Y

Claim Text:
1. A three-dimensional printing apparatus, comprising: a tank filled with a liquid forming material; a movable platform movably disposed above the tank; a light source disposed below the tank and configured to project light on the liquid forming material so as to form a three-dimensional object layer by layer on the movable platform; a detection module disposed above the tank and comprising a signal emitter and a signal receiver, wherein the signal emitter is configured to emit a detection signal and the signal receiver is disposed on a transmission path of the detection signal; and a control unit coupled to the detection module and the movable platform, wherein the control unit activates an error-detection mechanism so as to control the movable platform to move toward the detection module, and determines whether the three-dimensional object is abnormal based on whether the detection signal is detected by the signal receiver.