Commercial AC 100V or 200V power supply can be used regardless of 50/60Hz, and the optional speed can be selected by the speed setter on the control panel. The speed can be changed infinitely at stable rotation
throughout a rage from high speed of the rated speed 2500min 1 to low speed of 1/20. There are wide variations such as SYW model with worm reducer or SYG model with basetype coaxial reducer except the SYD
model of standalone motor. The SY series are the cutdown version with the features limited to speed controls.