| 摘要 |
A three-dimensional printer 10 including a print head 12 for extruding a print material and a build platform 16 for receipt of the print material, the print head and the build platform each having a motion sensor 60, 62 for generating a position signal to a controller 46 which compares the actual position of the print head and the build platform with a desired position of the print head and the build platform for generating an error signal to x-y axis and z-y axis translators 14, 18 to minimize relative motion between the print head and the build platform and unwanted positional error in an x-y printing plane. A three-dimensional printer comprising a closed loop feedback controller adapted to generate signals to the translators in response to motion sensor signals to minimize unwanted positional error is further provided. Preferably, the x-y and z translators are stepper motors and the sensors may be a motion sensor such as an accelerometer, optical motion or piezoelectric sensor. |
