Analysis of Force Acting on Drawing Compasses Required for Drawing Circle

要旨

<p>In the present study, the action point, direction, and severity of the required force on the knob in a compass for drawing a circle with a uniform thickness and dark line on a paper are analyzed. In this paper, as the analysis model, the structure and mechanism of the compass are presented. Further, for the analysis, the coordinate system is set in the compass. Analysis models are built based on the set coordinate system. Two cases of ideal and unideal forces acting on the compass are considered in the analysis models. When the ideal force is applied on the knob, a circle with a uniform thickness and dark line is drawn on the paper. When the unideal force is applied on the knob, a circle with a non-uniform thickness and light line is drawn on the paper. Based on the analysis results, experimental tests are conducted regarding the built analysis models. Moreover, the suitability of the analysis models is examined by comparison of the experimental and analysis results. The analysis results show that the drawing of a circle with a uniform thickness and dark line is influenced by the action point, direction, and severity of the force acting on the knob in the compass.</p>

主題