Automatic Wire Cutter

Abstract: This bachelor thesis project in mechatronics involved making a working prototype of an automatic wire cutter and evaluating its accuracy. The accuracy of the machine was increased by analysing measurements of the machine’s initial precision and thereafter performing a calibration to diminish the eect of unwanted errors. Before calibration the machine’s accuracy was ± 0.73 cm and after calibration it was calculated to be ± 0.06 cm in its intended operating range of 5-20 cm. The main limitations of the machine’s accuracy were determined to be slippage in the feeding mechanism, the mathematical model that was used, the step resolution of the stepper motors, the oset between the blades in the cutting mechanism as well as the wires bending when being fed.