PSF-50型反馈式全射流喷头是一种单边逆反馈负压切换型喷头(示意如图一)。在该喷头的研制中,对如何保证步进动作频率的稳定性曾作过一些探讨,现简述如下。一、用单根塑料管作为信号传输管时的问题当信号传输管4用单根塑料管时,改变管长及管径可以改变信号流传导的时间,从而改变步进动作的频率。试验结果表明,使用内径 PSF-50 feedback full jet nozzle is a unilateral inverse feedback negative pressure switching nozzle (shown in Figure 1). In the development of the nozzle, how to ensure the stability of the frequency of stepping movements have made some discussion, are summarized below. First, the use of a single plastic pipe as a signal transmission pipe When the signal transmission pipe 4 with a single plastic pipe, change the pipe length and diameter can change the signal flow of time, thereby changing the frequency of step action. Test results show that the use of inner diameter