Pulleys are on the market that permit an adjustment in the width of the groove. The effective pitch diameter of the pulley is thus varied, and moderate changes in the speed ratio can be secured.
It is the difference between theoretical normal pitch and its actual measured value. The major element to influence the pitch errors is the runout of gear flank groove.
推测的法向周节与实际测量值不同。影响周节错误的最主要因素是齿轮侧面有凹槽。
3
With the theory of kinematics, the universal model of changed Angle and variable pitch spiral groove on any turning surface is researched.