Abstract: | This thesis deals with developing an application for measuring the
actual position of an extruder of a 3D printer using common USB camera
and PC. 3D printers use stepper motors to position the extruder which
is very accurate way of positioning. Often, due to a bad design the stepper motors canlose one or more steps. When such event occurs the printing software doesn't know real extruder position and the rest of the currently created object is printed incorrectly. The purpose of the devised application is to detect this difference between real and known
positions as early as possible and allow an operator to prematurely
cancel the printing. The idea is to detect unique markers placed on
movable parts of the 3D printer using video analysis and then
calculate the actual extruder position. Possible usage of such
application for real printing monitoring is also discussed and
verified by measuring the actual detection accuracy.
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