1. Description

The K&S 2H17SH-KS02 is a two-phase hybrid stepping motor manufactured by K&S Motion Technology (also associated with Kulicke & Soffa), designed as a compact and reliable motion control solution for a wide range of automation applications. This NEMA 17 standard motor (42mm frame size) combines a standard 1.8° step angle with a robust 4.2 kg·cm holding torque, making it a versatile choice for precision positioning tasks.

Engineered with high-performance rare-earth magnets and an optimized rotor-stator design, the K&S 2H17SH-KS02 delivers smooth, low-vibration operation across a broad speed range. Its 4-wire configuration ensures straightforward integration with leading stepper drivers, while its Class B insulation and IP40/IP54 protection options provide dependable performance in diverse industrial environments.

2. Application Scenarios

A small-scale manufacturer of custom PCB prototyping equipment struggled with inconsistent positioning accuracy on their desktop CNC milling machines. The original stepper motors exhibited noticeable torque drop-off at higher speeds, leading to missed steps and ruined copper-clad boards. Worse, the motors’ high operating temperatures required cooling fans that added noise and complexity to the compact machine design.

By switching to the K&S 2H17SH-KS02, the engineering team immediately observed a marked improvement in torque retention at speeds up to 1000 RPM. The motor’s 1.8° step angle, combined with microstepping drivers (such as the TMC2209), allowed for smoother axis movement and finer surface finishes on the milled boards. The optimized winding design of the K&S 2H17SH-KS02 significantly reduced heat generation, eliminating the need for active cooling and enabling a quieter, more energy-efficient machine. The result was a 40% reduction in scrap rates and a noticeable increase in customer satisfaction due to the improved quality of the prototype boards.

3. Parameters

Parameter Notes: The 2H17SH-KS02 is defined by its NEMA 17 form factor, ensuring drop-in compatibility with a vast ecosystem of existing machinery. Its 1.8° step angle is an industry standard, offering a balance between resolution and speed for most automation tasks. The IP54 variant provides added protection against dust and light moisture for more demanding shop floor environments.

4. Technical Principles and Innovative Values

• Innovation Point 1: Hybrid Stepper Technology for Superior Torque
  The K&S 2H17SH-KS02 utilizes a hybrid stepper motor design, which combines the best attributes of variable reluctance and permanent magnet motors. The rotor incorporates a high-energy rare-earth magnet, which, when paired with the precisely engineered stator teeth, generates a significantly higher holding torque-to-size ratio compared to traditional permanent magnet steppers. This results in the 4.2 kg·cm holding torque, allowing the motor to maintain position firmly even under load.
• Innovation Point 2: Optimized Winding for High-Speed Performance
  Many standard stepper motors suffer from a sharp torque drop-off at higher speeds due to inductive reactance. The K&S 2H17SH-KS02 features an optimized winding design that balances inductance and resistance, allowing it to maintain useful torque at speeds of up to 1000-2000 RPM. This makes it effective not only for slow, precise indexing but also for faster, dynamic movements like those found in pick-and-place operations or laser engraving.
• Innovation Point 3: Low Vibration and Acoustic Noise
  Through careful optimization of the magnetic circuit and rotor geometry, the K&S 2H17SH-KS02 minimizes mid-range resonance, a common problem in stepper motors that causes noise and lost motion. This low-vibration characteristic is critical for applications like 3D printing and optical inspection, where any mechanical vibration can directly affect the quality of the finished product.
• Innovation Point 4: Standardized Form Factor and Broad Compatibility
  By adhering strictly to the NEMA 17 standard, the K&S 2H17SH-KS02 ensures universal mechanical compatibility. The motor is designed to work seamlessly with modern chopper-based microstepping drivers like the DM542 and TMC2209, enabling microstepp