1, ELECTRONIC GEAR:
Pt: Servo motor encoder resolution [pulse/rev]
ΔS: Travel distance per servo motor revolution [command unit/rev]
CMX: Electronic gear numerator
CDV: Electric gear denominator
CMX/CDV = Pt/ΔS
//BY CARSON : 其实另外有个参数，可供设置的，叫脉冲当量，与上面配合使用即可。
