Magntek Magnetic Sensor Empowers High-Precision Position Detection for CNC Machine Tools

In modern CNC machine tools’ precision motion-control systems, high-accuracy position detection is the cornerstone of machining fidelity.  Today’s dominant solutions—optical encoders or resolvers—still suffer from bulky housings, contamination vulnerability and limited shock-and-vibration immunity.  Magnetic sensors, offering contact-free measurement, robust immunity to dirt and oil, and an extremely compact footprint, are rapidly becoming the next-generation feedback element for machine-tool positioning.  Based on Hall or magneto-resistive principles, they sense magnetic-field changes to resolve angular or linear displacement, remaining unaffected by cutting fluid, dust or metallic debris.  While maintaining accuracy within ±0.1°, they simultaneously boost system reliability, making them ideal for high-speed spindles and rotary tables.

Inside CNC systems, an 18-bit high-resolution magnetic sensor handles the mission-critical angle/position feedback.  Its 18-bit digital output delivers a theoretical angular resolution of 0.005° across 360°, an essential prerequisite for micron-level machining precision.  Compared with legacy 12- or 16-bit devices, the advantages are three-fold:  

1. Finer resolution enables more accurate servo-motor phase control and higher contouring quality;  

2. Faster response satisfies the demands of high-speed, high-precision motion control;  

3. Stronger noise immunity guarantees stable signalling inside the electrically noisy cabinet of a machine tool.  

On a five-axis machining centre, for instance, the sensor provides real-time, high-fidelity feedback of the swivelling head and rotary-table orientation, closing the position loop for complex free-form surface machining.

Magntek’s MT6825GT-MMD is a high-performance 18-bit magnetic angle sensor that integrates advanced magneto-resistive technology into a compact TSOP-16 package.  Operating from 3.3 V to 5.0 V and across –40 °C to +125 °C, it thrives in the heat and vibration of a CNC shop floor.  Key specifications underline its suitability for machine-tool duty:  

- 18-bit resolution yields >260 000 unique positions per revolution, satisfying ultra-high-precision indexing;  

- Typical integral non-linearity (INL) is below ±0.5°, ensuring full-scale linearity;  

- 20 kHz bandwidth tracks rapid spindle-speed changes in real time.  

Higher integration sets it apart from competing devices: on-chip automatic gain control and offset cancellation eliminate complex external signal-conditioning circuitry.  In practice, the MT6825GT-MMD bolts directly to the rear of a servo motor or main spindle, replacing a traditional optical encoder.  Its rugged, sealed design resists ingress of coolant and metallic swarf, cutting maintenance cost and downtime.  

As Magntek’s authorised distributor, MANDU provides full-lifecycle support—sensor selection, magnetic-circuit modelling, mounting advice and sample procurement—helping customers integrate and validate performance quickly.

For CNC developers who demand ultimate accuracy and machine reliability, Magntek’s MT6825GT-MMD magnetic sensor delivers the precision, environmental toughness and long-term stability required to upgrade a position-feedback system.  Its non-contact, wear-free operation ensures lifetime consistency, making it a key component for elevating machine performance and market competitiveness.

About Mandu Technology

Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.

Business: sales@manduic.com