poler

In general , the poler coordinates (θ,ρ) of disk cam profile are calculated by means of the designing functions with cam rotational angle which is increased by an unchanging incremental step . So that , the polar angles θ of cam profile coordinates must increase by changing incremental steps .

盘形凸轮廓线的极坐标（θ，ρ），通常是按凸轮转角ψ为等步长来进行计算的，如此所得凸轮廓线极坐标的极角θ将为不等分值。