28H 1.8° Linear Stepping Motor
28
2
| Quantity: | |
|---|---|
Product Description & Feature
Henghe linear stepper motors are designed based on the know-how technology of hybrid stepper motors, ball screws, and nuts. Provide high torque, high precision, and high efficiency to fit the application needs of designers. In the case of external linear actuators, the lead screw is permanently attached to the motor shaft and turns with the shaft when the motor is energized. If an externally threaded nut is mounted on the lead screw and secured against rotating by an external guide, the threaded nut moves along the lead screw.
The combination of motor styles, motor sizes, ball screws, and nuts, gives the freedom to use motors of different form factors to exactly fit in the application. And, it provides the best performance with any drive and power supply.
The Ball screws of Linear stepper Motors have outstanding transmission efficiency of over 90%, incomparably higher than lead screws. Their required torque is just less than a third of what the lead screws require. Therefore, it is easier to transfer a linear motion into a rotary motion.
The ball screw of the linear stepper motors adopts the Gothic arch groove profile, and its axial clearance can be adjusted at very fine intervals and can be rotated slightly. In addition, by giving a preload to the screw, the axial clearance could be adjusted to 0 to achieve higher accuracy. The repetitive positioning accuracy of the ball screw linear stepperping motor can reach ±0.02mm, the screw diameter is up to 10mm, and the lead starts from 0.01mm/rev. Various stroke lengths, lead wires, and end treatments of the screw rods can be customized.
The Ball screws of linear stepper motors maintain excellent durability achieved by carefully selected materials, proper heat treatment, and machining with advanced production technologies. Ball screws are generally manufactured to maintain the minimum standard hardness at 58 HRC with the materials listed on the right table.The overall hardness far exceeds the combination of threaded screws and nuts.
| Ball screw type | 601 | 602 | 606 | 610 | 504 |
| Ball Size | Ф0.8 | Ф0.8 | Ф0.8 | Ф1.2 | Ф0.8 |
| Number of thread | 1 | 1 | 2 | 2 | 1 |
| Thread direction | Right | ||||
| Shaft root dia. | Ф5.3 | Ф5.1 | Ф5.2 | Ф5.0 | Ф4.3 |
| Number of circuit | 3.7×1 | 2.7×1 | 1.6×2 | 1.2×2 | 2.7×1 |
| Shaft, nut material | SCM415H | ||||
| Surface hardness | HRC58~62 | ||||
| Anti-rust treatment | Anti-rust oil | ||||
| Grade | C7 | ||||
| Nut size | A | B | C | D | H | W | X | E | Position accuracy | Total run out | Axial play | Dynamic load[N] | Static load[N] |
| BS0601 | 26 | 4 | 17 | 13 | 16 | 20 | 3.4 | ±0.05 | 0.12 | ≤0.03 | 680 | 1200 | |
| BS0602 | 28 | 4 | 17 | 15 | 19 | 22 | 3.4 | ±0.05 | 0.12 | ≤0.03 | 750 | 1450 | |
| BS0606 | 27 | 4 | 17 | 14 | 16 | 21 | 3.4 | 5 | ±0.05 | 0.12 | ≤0.03 | 870 | 1600 |
| BS0610 | 27 | 4 | 23 | 14 | 16 | 21 | 3.4 | 7.5 | ±0.05 | 0.12 | ≤0.03 | 950 | 1650 |
| BS0504 | 24 | 4 | 22 | 12 | 16 | 18 | 3.4 | ±0.05 | 0.12 | ≤0.03 | 470 | 720 |
A linear stepping motor is a device that generates force and movement through a straight line. The linear stepper motor uses a stepper motor as the source of rotation power. Inside the rotor, there is a threaded precision nut instead of the shaft. The shaft is replaced by a screw.
When the rotor rotates (as in a traditional stepper motor), the linear movement is achieved directly through the nut and threaded screw. The conversion from rotating to linear is directly completed inside the motor, which greatly simplifies the design of rotating to linear applications. This makes ideal high resolution and accuracy for applications that require precise motion.
Over the years, stepper motors have been widely used in various fields. With the trend of miniaturization, computer control and cost reduction, the application range of hybrid linear stepping motors is gradually expanding.
Especially in recent years, the application field of linear stepper motors has expanded rapidly. These precise and reliable motors can be used in many equipments, such as blood analyzers and other medical instruments, automatic stage lighting, imaging equipment, HVAC equipment, valve control, printing equipment, X-Y stages, integrated chip manufacturing, inspection and testing equipment. This attractive technical solution does not require the use of a large number of components, saves costs related to assembly, procurement, and inventory, and is suitable for almost all applications.
The static torque is the total torque that the motor can overcome when starting at a standstill. The output torque is the torque when the motor is running at a certain speed.
For fine-threaded motors, we do not recommend you to do this, because the force generated may cause the motor to jam. However, it is allowed to be carried out with reduced power input.
This depends on the lead size of the screw you are using. A screw with a small lead and self-locking function will not fall, and a screw with a larger lead may fall without self-locking function!
It is normal for the motor to allow a temperature rise of up to 75 degrees in the power-on state. The insulation class of the motor is Class B (130 degrees), and the holding current can be reduced to 1/4 to reduce heat generation.
The linear stepper motor has been lubricated before shipping and does not need to be relubricated under normal operating conditions.
The stepper motor is an open-loop actuator without feedback. But it can be equipped with encoder when precise positioning is required.
This may be resonance. The resonance frequency range of permanent magnet motors is 75~90PPS, and the resonance frequency range of hybrid motors is 140~200PPS. Try to start accelerating above these frequencies, or micro stepping function.
