#4L60E SERVO ASSEMBLY DIAGRAM FREE#

It then has to rotate backwards in the opposite direction, hunting for the correct position. When moving the magnet from one position to another at fast stepping rates, inertia often causes the magnet to overshoot the correct position. For example, it can be made to have six steps instead of 12, and can sometimes move to any step according to any given electrical connection. The stepper motor can skip over increments. Table 1 Polarities for Stepping Motor in Figure 2

Table 1 shows the magnetic polarities available to produce the steps in increments of 30°, giving a total of twelve different positions.įigure 2 Incremental control with a stepper motor The name ‘stepper motor’ is usually given to a motor that can rotate in fixed increments of rotation, say, in steps of 30° or 15°, or even as small as 1 ° increments.įigure 2 shows an elementary stepper motor with three windings and a two-pole permanent magnet. Therefore they do not fit neatly into either DC or AC motor categories, as rotation is a result of pulses of DC current, often at differing polarities that could be interpreted as alternating square wave current, i.e. The stepper motor will stand still if a continuous DC current is applied. Stepper motors do not rotate automatically as other motors do. Stepper Motor WorkingĪ stepper motor can rotate in either direction, one step at a time, back and forth, or step after step as pulses are applied by the controller. Electrical workers working in manufacturing industries and in production factories often work on process and control systems, however, instrument fitters often specialize in these areas. The study of such systems is known as ‘process and control’. The controller then adjusts the signal to the servo motor to cancel out any error.Ī block diagram of a typical DC servo system is shown in Figure 1.įigure 1 DC Servo motor block diagram DC Servo Motor Applications The controller compares the setting to the measured result and calculates the error. The operation of the servo motor is measured by some appropriate device and the reading relayed back to the controller. The DC servo motor operates according to the controller. The controller sets a condition, such as a position or speed, which is relayed to a servo motor. Servomechanisms are a class of control systems that form a control loop. Higher output torque for the same-sized motor The advantages of DC servo motors are: 1.

One moves in discrete steps of fixed angles (stepper motor) while the other is able to take up any angle of rotation and maintain that angle (positional control).

In this there are also two distinct types.

#4L60E SERVO ASSEMBLY DIAGRAM FREE#

One is a rotating machine free to rotate in either direction, the other a semi-stationary machine that only rotates to take up a particular position or angle when required by the system. To do this there are two distinct types of DC servo motors. It must be able to stop, start, change direction, run at constant speed or take up accurately any desired position throughout 360°. It is essential that the response characteristics be identical in both directions of rotation.

A DC servo motor is usually defined as any motor that can be remotely controlled by providing negative feedback.

4l60e servo assembly diagram