Linear Screw Stepper Motor

- Oct 27, 2018 -

The linear screw stepper motor uses a stepping motor as a rotary power source, and converts the rotary motion into a linear motion through a screw drive. A precision ball linear motor stepper motor can replace the cylinder in some occasions, achieving accurate positioning, controllable speed and high precision. Linear screw stepper motors are used in a wide range of high precision applications including manufacturing, precision calibration, precision fluid measurement, and precise positional movement.


Under the condition that the stepping motor step angle can not be used, the subdivision driver can be used to drive the stepping motor. The principle of the subdivision driver is to change the size of the adjacent (A, B) current to change the clip of the synthetic magnetic field. The angle to control the stepper motor power amplification is the most important part of the drive system. The torque of a stepper motor at a certain speed depends on its dynamic average current rather than the quiescent current. The larger the average current, the larger the motor torque. To connect to the average current, it is necessary to drive the system to overcome the back EMF of the motor. Therefore, different driving modes are adopted in different occasions. Up to now, the driving methods generally have the following types: constant voltage, constant voltage string resistance, high and low voltage driving, constant current, and subdivision number. In order to improve the dynamic performance of the motor as much as possible, the signal distribution and power amplification are combined to form the driving power of the stepping motor.


If the pulse frequency is higher than this value, the motor can start normally, and the lost or blocked rotation may occur if the pulse frequency is higher than this value. In the case of load, the starting frequency should be lower. If the motor is to be rotated at a high speed, the pulse frequency should have an acceleration process, that is, the starting frequency is low, and then rise to the desired high frequency at a constant acceleration. The hydromagnetic stepping motor is generally two-phase, with a small torque and volume, and the step angle is 75 degrees or 15 degrees.


The use of linear screw stepper motors is very extensive and has very significant features that meet the needs of people. Japan Yamashita brand precision hybrid linear screw stepper motor can be customized. Types are A, through shaft type; B, external drive type; C, solid word axis type; the choice of linear screw stepper motor should consider the following points:

1, the load size (push or pull);

2, linear speed;

3. Itinerary;

4. Acceleration requirements;

5. Backlash acceptable to the system;

6, positioning accuracy;

7, horizontal or vertical installation;

8, the current and voltage of the driver;

9, screw lead and so on.

 

Linear screw stepper motors are used in a wide range of high precision applications including manufacturing, precision calibration, precision fluid measurement, and precise positional movement.