Constant tension spinning controlling system is adopted by HY491 roving machine. Through ASFA411A roving machine has traditional cone drum mechanism, stable spinning quality can be assured in high speed in condition of suitable controlling.

• HY491型粗纱机采用恒张力纺纱控制系统,ASFA411A型机虽有传统的锥轮机构,但只要控制得当,在速度较高的情况下,仍能保证纺纱质量较为稳定。