目前我国还没有既可绘制平行投影图又可绘制中心投影图的工具,致使广大技术人员未能摆脱繁重的绘图劳动。新研制的两用绘图机,结构简单、操作方便、作图迅速准确,具有能同时绘制平行投影图和中心投影图两种功能。本文重点叙述了两用绘图机的工作原理、结构特点及参数选择,并对各有关设计进行了计算,从而得出该绘图机是一种工作可靠、适于应用推广的比较理想的绘图工具。 At present, China does not have the tools to draw parallel projection pictures and center projection drawings, resulting in the vast numbers of technical personnel failing to get rid of the heavy drawing work. The newly developed dual-use plotter, simple structure, easy operation, rapid and accurate mapping, with the ability to draw both parallel projection and center projection two functions. This paper focuses on the working principle, structural characteristics and parameter selection of dual-purpose plotter, and calculates the relevant design, and draws a conclusion that the plotter is an ideal drawing tool that is reliable and suitable for application and popularization.