Stepper motor is the electrical pulse signal into angular displacement or linear displacement of open loop control stepping motor. In the case of the overload, motor speed, stop position depends only on the pulse signal frequency and pulse number, and not affected by load change, when the stepper motor driver receives a pulse signal, it is driving a stepper motor according to set the direction of a fixed Angle, known as the 'step Angle', its rotation is based on the Angle of the fixed step by step. Stepper motor drive principle on the shaft of the motor load inertia size and sensitivity of the motor for the whole step will affect the precision of the system. Usually, when the load is less than the motor rotor inertia, the impact is not big. But when load inertia reach even exceed 5 times of rotor inertia, the principle of stepping motor drive will be great influence to sensitivity and response time. Make even step into the amplifier can't work in normal adjustment range. Stepper motor drive principle, so for this kind of moment of inertia should avoid to use. Recommended for stepper motor inertia Jm and the relationship between the load inertia Jl is as follows: 1 or less, Jl/Jm < 5 load torque calculation method to the stepper motor shaft load on the torque calculation formula, due to mechanical abnormality. But no matter what kind of machinery, should calculate the conversion to the load torque of motor shaft. Principle of stepper motor drives, usually convert to the stepper motor shaft load torque can be calculated by the following formula: Tl = (FL/2πμ)T0 type, Tl, convert to the load on the motor shaft torque (N。 M)F: the force needed for the axial moving workbench L: every turn the motor shaft mechanical displacement (M)To: ball screw nut, bearing part of the friction torque convert To the value of the stepper motor shaft (N。 M)Mu: the efficiency of the drive system is shown in figure 1 table feed schematics F depends on the weight of the workbench, the coefficient of friction, horizontal or vertical direction of cutting force, whether or not to use the balance blocks (In the vertical axis)。 Stepper motor drive principle if the horizontal direction, the value of F axis by illustrations are given. Without cutting: F = mu (W fg), when cutting: F = Fc mu (W fg Fcf)Type, W: the weight of the sliding block (The workbench and artifacts)Kg mu: Fc: friction coefficient of cutting force reaction fg: use gib Fcf: binding force due to the cutting force on the slider surface force on the workbench (kg)The workbench to guide the positive pressure. When calculating the torque of the following points should pay special attention to. Principle of stepping motor drives the friction torque generated in the strip must be fully considered. Principle of stepper motor drives, usually just from the weight of the slider and the friction coefficient to calculate the torque is small. Please pay special attention to due to the strip tightening and precision error generated by the torque on the surface of the slider. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
