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一、直接连接误差的分析采用微电子技术改造机床时,步进电机与丝杠连接一般有两种方法:一种是齿轮过渡;另一种是直接连接。采用齿轮过渡,可使纵向及横向的脉冲当量是整数,优点是避免累积误差,定位精度可以得到保证,而且运算的软件设计也简便;缺点是增加了机床改造的复杂性,需要制造一对齿轮,还要有齿轮架,装配调整的工作量也就增加,而且增加齿轮副以后,齿轮传动间隙的存在有可能产生冲击振动,使加工精度下降及粗糙度增加。此外增加传动链后效率降低,
First, the analysis of direct connection error When using microelectronic technology to transform the machine, the stepper motor and lead screw connection in general there are two ways: one is the gear transition; the other is a direct connection. The use of gear transition, the vertical and horizontal pulse equivalent can be integer, the advantage of avoiding the cumulative error, the positioning accuracy can be guaranteed, and computing software design is also simple; drawback is to increase the complexity of machine transformation, the need to create a pair of gears , But also a carrier, assembly and adjustment of the workload will increase, and increase the gear pair, the existence of gear transmission gap may produce shock and vibration, so that processing accuracy and roughness increase. In addition to reduce the efficiency of the drive chain,