With the rapid upgrading of industrial automation, intelligent equipment, LiDAR and precision measurement and control industries, photoelectric encoders, as core sensing components for motion control, angle positioning and speed monitoring, have put forward extremely high standards for the accuracy, stability and weather resistance of matching encoder discs. As a core precision component of high-end reflective encoders,  electroformed reflective encoder discs have gradually replaced traditional etched, laser-cut and glass encoder discs by virtue of ultra-high linear positioning accuracy, flat reflective surfaces and stress-free deformation resistance. They have become the preferred accessories for servo motors, CNC machine tools, intelligent driving and optical detection equipment. Rooted in Nantong’s precision manufacturing cluster, Nantong Zhuolida relies on mature process accumulation from its three major production bases. Focusing on the customized production of high-precision electroformed reflective encoder discs, the company solves industrial pain points of traditional discs such as poor accuracy, uneven reflection, easy deformation and short service life, providing cost-effective localized high-precision encoder disc solutions for precision equipment enterprises in the Yangtze River Delta.

1. Industrial Pain Points and Deficiencies of Traditional Reflective Encoder Disc Processing

Most conventional reflective encoder discs on the market are produced by laser cutting, chemical etching or glass coating processes, with obvious limitations in high-end precision measurement and control scenarios. Laser cutting is a thermal processing method. High-temperature burning easily causes burrs, melted edges and micro-deformation on the edge of code tracks, as well as uneven spacing of fine engraved lines, directly resulting in encoder signal jitter and large pulse errors, which fail to meet high-precision angle positioning requirements. Traditional etching processes have inherent undercut defects, leading to inclined side walls and inconsistent width of code tracks, blurred boundaries between reflective and light-transmitting areas, and poor reflection uniformity. Long-term high-speed operation is prone to signal step loss and inaccurate detection.

In addition, glass encoder discs feature high brittleness and poor vibration resistance, and are extremely fragile under industrial vibration and alternating high and low temperature conditions, limiting their application scenarios. They also have high production costs and long customization cycles. Moreover, traditional processes suffer from poor mass production consistency with significant batch-to-batch accuracy deviations. High-end equipment has long relied on imported precision reflective encoder discs with high procurement costs and long delivery cycles, which seriously restrict the quality upgrading of the local precision automation industry. High-precision  electroformed reflective encoder discsare urgently needed to realize import substitution.

2. Core Technical Advantages of Precision Electroformed Reflective Encoder Discs

Adopting the additive molding principle of electrochemical ion deposition and different from traditional subtractive processing, electroformed reflective encoder discs are currently the optimal production solution for high-precision encoder discs. Based on ultra-high-precision photolithography master molds, complete encoding structures are integrally formed by uniform layer-by-layer deposition of high-purity nickel-cobalt alloy ions. The whole process involves no mechanical cutting, no high-temperature thermal damage and no undercut deviation, fundamentally eliminating the accuracy defects of traditional encoder discs. The linear width tolerance of product code tracks is stably controlled within ±0.75μm, and the angular resolution reaches ±0.001°. The steep and regular side walls with clear boundaries effectively ensure stable and accurate photoelectric signal acquisition.

Compared with traditional products, electroformed reflective encoder discs have flat and smooth surfaces. The ultra-precision flattened reflective working surface delivers excellent reflection uniformity, which effectively avoids signal interference and pulse disorder. Made of nickel-cobalt alloy with dense structure, wear resistance, corrosion resistance and vibration resistance, the discs can operate stably in a wide temperature range of -40℃ to 120℃, adapting to various complex industrial working conditions. Meanwhile, zero internal stress ensures no deformation or warping during high-speed rotation, achieving a far longer service life than ordinary etched and laser-cut discs. Customization of non-standard structures such as incremental, absolute, Gray code and multi-turn encoding is supported to meet the iterative needs of high-end precision equipment.

3. Dust-Free Standardized Mass Production Ensures Precision Quality Consistency

Precision optical encoder discs have strict requirements for production environment, process control and accuracy detection. Nantong Zhuolida has built an exclusive dust-free electroforming workshop and established a full-process standardized quality control system covering master mold precision manufacturing, high-purity solution proportioning, intelligent pulse electrodeposition, low-temperature demolding, dust-free polishing and precision testing. All processes are independently controlled without outsourcing. Equipped with intelligent current regulation and circulating filtration degassing systems to balance metal deposition rate, every high-precision electroformed reflective encoder disc features uniform thickness, dense structure and consistent accuracy.

All finished products undergo full-size inspection via high-precision vision detectors to strictly verify code track accuracy, concentricity, roundness, flatness and reflection uniformity, eliminating batch deviations and ensuring stable mass production quality. The products fully meet high-precision, high-stability and high-cleanliness application standards for both laboratory precision detection equipment and industrial automated mass production equipment, completely solving the common industry problems of insufficient accuracy and poor stability of domestic encoder discs.

4. Wide Application Scenarios for High-End Precision Equipment

 electroformed reflective encoder discsare applicable to a wide range of high-end precision scenarios. In the field of industrial automation, they are used for joint encoders of servo motors, CNC machine tools and collaborative robots to ensure accurate equipment positioning, speed regulation and closed-loop control. In the intelligent driving industry, they adapt to multi-line LiDAR perception systems to support autonomous driving ranging, speed measurement and environmental perception. In the precision optics field, they are widely applied in optical detectors, precision ranging instruments and speed sensors. Furthermore, they can meet the high-precision measurement and control requirements of medical precision equipment, aerospace supporting instruments, new energy intelligent equipment and other high-end fields, serving as core supporting components of high-end photoelectric sensing systems.

5. Nantong Regional Advantages Empowering the Yangtze River Delta Precision Manufacturing Industry

Benefiting from Nantong’s superior geographical location adjacent to Shanghai, Suzhou and Wuxi in the core Yangtze River Delta industrial cluster, Nantong Zhuolida can quickly respond to customers’ needs for sample debugging, new product R&D and batch delivery in surrounding cities. As a professional local electroformed reflective encoder disc manufacturer, we rely on the production capacity of three major manufacturing bases in Nantong, Kunshan and Shenzhen to realize rapid customization, short-cycle delivery and cost-effective solutions. Compared with imported products, our products greatly reduce enterprises’ procurement and operation costs. We also provide one-on-one process optimization and DFM structural design suggestions, supporting customized ultra-thin, high-density and special-shaped multi-track reflective encoder discs to fully meet customers’ differentiated precision manufacturing needs and continuously empower the high-quality development of the Yangtze River Delta precision automation industry.

Conclusion

With the continuous iteration of precision measurement and control technology, high-precision  electroformed reflective encoder discshave become indispensable core accessories for high-end photoelectric encoders, featuring micron-level accuracy, stable reflection performance, vibration and temperature resistance and long service life. With years of in-depth experience in precision electroforming technology, mature technical accumulation, dust-free mass production capacity and strict quality control system, Nantong Zhuolida continuously provides customers with high-precision, high-consistency and cost-effective customized reflective encoder disc products, facilitating the high-precision localization upgrading of the precision equipment industry.