In today’s rapidly developing medical technology, miniaturization, precision, and intelligence have become the core directions of device evolution. Among numerous precision motion control components, micro linear stepper motors equipped with 7.5/15 degree dual step angles and M3 screws (especially the 20mm stroke model) are quietly becoming indispensable “muscles and nerves” in modern medical equipment. This sophisticated power source, with its outstanding performance and compact body, injects unprecedented precision and reliability into diagnostic, therapeutic, and life support equipment.
Medical Micro Devices: The Ultimate Challenge for Motion Control
The requirements for driving components in the medical environment are almost stringent, especially in portable, implantable, and highly integrated devices:
Submillimeter or even micrometer level accuracy:Â precise drug delivery, cell manipulation, laser positioning and other operations cannot tolerate any deviation
Ultimate space utilization:Â Every inch of land is valuable inside the device, and the driving components must be extremely compact and lightweight.
Ultra quiet operation:Â reduces patient anxiety and avoids interfering with sensitive medical environments such as operating rooms and monitoring rooms.
Ultra high reliability:Â Equipment failures may be life-threatening, requiring long component life and extremely low failure rates.
Low power consumption and heat generation are crucial for battery powered devices and applications close to the human body.
Easy to integrate and control:Â supports open-loop or simple closed-loop, simplifying system design.
Strict biocompatibility and cleanliness:Â meet medical regulatory requirements (such as ISO 13485, FDA QSR).
7.5/15 degree+M3 screw micro motor: a powerful tool to solve the problem of medical precision control
M3 screw drive: a small yet highly capable precision engine
The core of miniaturization:Â M3 screw (nominal diameter 3mm) is currently the widely used standard for micro precision screws. Its small diameter is the key to achieving the ultimate compactness of the driving unit
Direct and efficient, with guaranteed accuracy: The rotational motion of the motor is directly converted into high-precision linear displacement, with a simple and reliable structure. Small pitch (usually 0.5mm or 0.35mm) is the physical basis for its high resolution. Combining the characteristics of stepper motors, it is easy to achieve micrometer level (μ m) positioning accuracy and excellent repeatability.
Power off self-locking and safety protection:Â The inherent self-locking characteristic of the screw can reliably maintain the load position when the motor is powered off, preventing accidental movement caused by gravity or external forces, which is crucial in medical applications.
High rigidity, as stable as a rock:Â Although small, a well-designed M3 screw transmission system can provide sufficient rigidity and thrust to meet the load requirements of most micro medical devices, ensuring stable and reliable operation.
Miniature Design: Conquering Space Limitations
Ultra small size, worry free integration:Â Using a combination of M3 screws and compact stepper motors, the entire linear module is compact and lightweight, making it easy to embed into devices with extremely limited space, such as handheld instruments, endoscope accessories, portable diagnostic devices, wearable devices, etc.
Lightweight and low inertia:Â significantly reduces the weight of moving parts, bringing faster acceleration/deceleration response, lower power consumption, and smaller operating noise, improving overall system performance and energy efficiency.
The shining application of micro precision power in the medical fielÂ
In vitro diagnostic (IVD) equipment:Â the cornerstone of precise analysis