Overview of linear screw stepper motor

1. Overview of linear screw stepper motor:

The linear screw stepping motor uses a hybrid stepping motor as the power source. Through the unique patented technology, the screw drive assembly and the motor rotor are combined to convert the motor's rotational motion into linear motion.

The products produced by LeanMotor open a new avenue for those who need high performance and excellent durability equipment design in a very small space. Various patented designs and use of a proprietary production method that incorporates engineering thermoplastics into the rotor drive nut along with the use of stainless steel Acme threaded guide rods make this motor quieter than other motors that use V-threads and bronze nut construction , efficient and durable. The life of the motor is more than 10 times higher than that of the commonly used bronze nut structure, and it requires no maintenance and does not affect the cost. Another feature is that the preload adjustment doesn't protrude out of the motor like other designs.

LeanMotor currently listed products are: 20mm series, 28mm series, 35mm series, 42mm series, 57mm series, 86mm series two-phase hybrid linear stepper motors. The product covers a variety of different step sizes, from 0.003048mm to 0.127mm microstep, which can provide uniform and fine resolution. There are three optional structures for each frame size: through shaft type, external drive type, and fixed shaft type.

2. Features of linear screw stepper motor:

● High precision, positioning accuracy can reach ±0.02mmThe linear screw stepper motor reduces the problem of interpolation lag due to the simple transmission mechanism. The positioning accuracy, repeatability, and absolute accuracy are generally higher than "rotary servo motor & ball screw", and are easy to implement. The positioning accuracy of the linear screw stepper motor can reach ±0.02mm, and the "rotary servo motor ball screw" can reach up to ±0.01㎜.

● High speed, up to 300m/min

From the comparison of speed and acceleration, the linear screw stepper motor has a considerable advantage. The linear screw stepper motor can reach a speed of 300m/min and an acceleration of 10g; the ball screw speed is 120m/min and the acceleration is 1.5g. . Moreover, the speed of the linear screw stepper motor will be further increased after successfully solving the heat problem, while the speed of the "rotary servo motor & ball screw" is limited and it is difficult to increase it further.

● Long life, easy maintenance

Linear screw stepping motors have installation gaps between moving parts and fixed parts, no contact, and will not be worn due to high-speed reciprocating motion of the mover. Long-term use will not change the positioning accuracy of the motion, and is suitable for high-precision occasions. The ball screw cannot guarantee the accuracy in high-speed reciprocating motion. Due to high-speed friction, it will cause the wear of the screw nut and affect the accuracy requirements of the movement. It cannot meet the high-precision requirements.

3. Application fields of linear screw stepper motor:

Linear stepper motors are suitable for applications requiring precise positioning, fast motion and long life. Typical applications include X-Y tables, medical equipment, semiconductor processing, communication equipment, modulation valves, printing equipment, environmental protection equipment, automatic robots, 3D printers, etc.