●Hybrid linear stepping motor is a stepping motor that converts rotation into linear motion through a built-in screw
●The actuator uses a basic hybrid stepper motor design, and a step angle of 1.8 or 0.9 degrees is applied. There are three basic types of linear stepper motors—fixed shaft, through shaft or externally driven versions.
Captive Lead Screw Linear Actuator
●Fixed shaft motor uses its own spline as a guide device to achieve a maximum stroke of 63.5mm in linear motion.
Non-Captive Lead Screw Linear Actuator
●Although the synthetic motion is linear, the screw still rotates, and the anti-rotation device needs to be designed by the customer.
External Lead Screw Linear Actuators
●Nut moves linearly relative to the screw
●The anti-rotation device needs to be designed by the customer.
External Lead Screw Linear Actuators、Non-Captive Lead Screw Linear Actuator、Ball Screw Linear Actuators、Captive Lead Screw Linear Actuator
The lead screws of the external linear stepper motors are integrated with the motor rotor as a part. It has an external drive nut that can be mounted to a carriage assembly. Linear motion is created by the nut traversing back and forth on the lead screw as it turns. The common end feature of the screw is a bearing journal. External linear stepper motors are most akin to motorized rails where the nut is replaced by a driven carriage assembly.
The nuts of the non-captive linear stepper motors are integrated with the rotor. The lead screw can go through the motor or be completely separated from the motor as a part. It has no reasonable stroke limits but the shaft must be attached to an assembly that will not rotate. This will then allow the lead screw to extend and retract without rotating, travel freely in and out of the motor body. In certain setups the motor body may serve as the drive or the nut in the assembly. The anti-rotation is by the attachments point and is commonly a cut or machine thread on the end of the screw. The non-captive is potentially the shortest overall length assembly.
Ball screws and lead screws are used for different applications and are often not interchangeable. Both have alternate advantages and disadvantages. If you compare a ball screw and lead screw design yourself, the first thing you might notice is that they are designed to carry loads differently. The way ball screws move a load is through recirculating ball bearings to maximize efficiency and minimize friction. A lead screw relies on the amount of friction between surfaces to be low compared to the amount of pressure being applied. That means that a lead screw does not have the same capability to be as efficient as a ball screw. They also provide linear actuators with better performance or faster speeds, depending on which design model you choose.
In a captive linear actuator design, the lead screw is connected to a spline shaft that passes through a spline bushing to keep it from rotating. The spline bushing prevents the lead screw from rotating but allows enough clearance for the shaft to move axially as the lead screw is driven back and forth with a corresponding clockwise and counterclockwise turn of the motor. The anti-rotation feature is inherent in the design and creates a stand-alone unit that pushes and pulls whatever device to which it is attached. Because it is independent, this type of actuator can also provide a push force without being attached to anything. For this reason, it's an excellent choice for packaging applications or push-button applications where the return motion is handled by a spring pre-load or influenced by gravity.
Valves used to control the flow of liquids are excellent applications for this product because the captive actuators can easily open and close them with speed control and accuracy. Captive actuators can also be used to control airflow in HVAC systems with automated dampers in the ductwork. They work particularly well due to their quiet operation, compact size, and ability to function in dusty/dirty environments.
Our 1.8 or 0.9 degree motor drives an integrated threaded screw through the rotor magnet and threaded nut assembly to provide linear motion in the machine. Wheeler's hybrid linear stepping motor provides a size specification of 21 to 86mm and has different resolutions, the step length is from 15 to 127um/step, and the linear force generated ranges from 1N to 2000N.
We are equipped with various precision screws with different leads and different pitches. According to the mechanical characteristics, the larger the lead, the lower the thrust, but the transmission speed is fast. The smaller the lead, the greater the thrust, but the transmission speed is slow.
Our nuts are made of special materials, which have good wear resistance, high lubrication, low friction, and high physical stability.
The closeness between the actual value and the theoretical value.
Due to manufacturing tolerances between individual parts in production, there will be slight differences in actual strokes. High-precision products make this error very small. However, the error always exists. For example, the screw lead is 1 inch (25.4mm), and the theoretical linear stroke of 360-degree rotation is 1 inch, but the actual maximum of 1 inch The error may reach +1-.0005 inches.
Under certain conditions, the motor is commanded to the degree of consistency of the position range of the same target. For example: Let the linear stepping motor nut move a certain distance from the starting point, measure and record this distance, call it, and then let the actuator return to the starting point, let the linear stepping motor repeatedly walk to the command distance X, the actual value and X The difference is repeated positioning accuracy.
The motor uses specially configured high-performance grease, so that the motor no longer needs to be lubricated, and has outstanding durability. The working temperature range is -65℃~250℃, and it is not flammable.
Lead screw stepper motors are used as a component within various linear motion control systems. They are well suited to instrument grade applications, where a smooth and precise operation is required. Some applications for lead screw stepper motors are: factory automaction、food processing、Packing&coverting、material handling.
●Because the error does not accumulate, good accuracy can be maintained regardless of whether it is a short stroke or a long stroke, which means that there is no need to use expensive position feedback devices, such as encoders. The motor can run in single-step, half-step, or micro-step mode, resulting in higher accuracy, greater power, and quieter operation.
●Excellent open loop control. No need for encoder, low cost, compact design
●The same power drive motor can maintain synchronization and maintenance-free
●Avoid complicated closed-loop control with suitable positioning accuracy, configurable unipolar and bipolar coils
●Using standard hybrid stepping motor size specifications to simplify integration
●The top of the screw rod has a thread for easy connection, and an adapter can be added to provide M2-M6 thread, which is convenient to match the load.
1. Can be self-locking
2. The number of parts is relatively small and the weight is light
3. Low noise during operation
4. Less maintenance
5. Can provide precise linear motion
6. Can provide a great mechanical advantage
7. Simple to manufacture
8. Simple design
9. Compact structure
10. High carrying capacity
HOLRY Linear Technologies lead screw stepper motor linear actuators feature heavy-duty ball bearings to maximize their thrust. Our lead screws are securely press-fitted into the motor’s rotor to allow a smaller footprint, while minimizing backlash and providing years of dependable life. Our stepper motor linear actuators are available in captive, non-captive, external and ball screw linear actuator configurations. Optional available accessories include connectors, wire harnesses, encoders, and custom lead screw nuts.
Stepper motor linear actuators are devices that use a stepper motor to create linear motion. They are commonly used in automation, robotics, and other applications that require precise and controlled linear movement.
The stepper motor inside the actuator consists of a rotor and stator, which work together to generate rotational motion. The linear motion is achieved by converting this rotational motion into linear motion through the use of a lead screw or other mechanism.
Stepper motor linear actuators are typically used in applications where accuracy and precision are critical, such as in laboratory equipment, medical devices, and manufacturing machinery. They offer a high degree of control over movement and can be programmed to move in very precise increments.
There are different types of stepper motor linear actuators, including captive, non-captive, and external linear actuators. Captive actuators have a fixed shaft, while non-captive actuators have a rotating shaft. External actuators use a separate lead screw or other mechanism to convert the rotational motion of the motor into linear motion.
Overall, stepper motor linear actuators are a versatile and reliable option for creating precise linear motion in a variety of applications.
