Electroforming reflective encoder disc
- Industrial Servo and Motion Control
- Precision joints for industrial robots

The electroformed reflective encoder disk is a core precision optical component developed for high-end optoelectronic encoders. It fundamentally overcomes the limitations associated with traditional manufacturing methods—such as laser etching, mechanical engraving, and glass disk fabrication. By leveraging integrated technologies that combine precision photolithographic master patterning with electrochemical ion deposition, the product achieves comprehensive improvements in structural precision, optical performance, mechanical stability, and environmental adaptability. It serves as a critical component for high-precision motion control, precision displacement sensing, and intelligent measurement and control equipment, finding wide application in high-end manufacturing sectors such as industrial automation, semiconductors, medical technology, and aerospace.
In terms of forming precision and encoding performance, this product moves away from the physical cutting methods of traditional machining. Instead, it replicates the structure of a precision master mold through atomic-level metal deposition. This process involves no cutting, compression, or residual stress, thereby fundamentally eliminating defects such as burrs, jagged edges, inconsistent track widths, and blurred boundaries. The product maintains stable track linewidth precision within ±1μm, with a minimum formed linewidth of 0.05mm. It exhibits exceptional consistency in track concentricity and roundness across the entire disc, supports angular resolution up to 24 bits, and achieves measurement accuracy as fine as 0.2″—far surpassing the precision of traditionally manufactured encoder discs. Unlike laser-etched discs, which suffer from issues such as edge burning, deformation, and resolution limitations, electroformed encoder discs feature sharp, uniform encoding boundaries and zero dimensional deviation. With near-perfect pattern fidelity, they output precise, regular pulse signals, effectively eliminating problems like missed steps, erroneous pulses, and counting errors during high-speed operation, thereby providing reliable data for high-precision closed-loop control.
Regarding optical sensing characteristics, the product utilizes a high-density nickel-cobalt alloy substrate with a uniform, mirror-like reflective surface layer. This ensures consistent, stable reflectivity free from localized brightness variations or stray light scattering. The precise alternating light-and-dark encoding structure enables the photoelectric receiver module to identify signals rapidly and accurately, significantly enhancing the signal-to-noise ratio while effectively mitigating issues such as ambient light interference, signal attenuation, and waveform distortion. Whether for precise alignment during slow, micro-movements or speed measurement during high-speed continuous rotation, the product maintains stable signal output and accurate counting. It is perfectly suited for the signal acquisition requirements of various reflective encoders—both incremental and absolute—and meets the demands of ultra-high-precision dynamic detection applications.
In terms of mechanical structure and environmental adaptability, the integrated molding... Its dense metal structure is seamless, weld-free, and devoid of weak points; the material offers high hardness, toughness, and resistance to both tensile stress and deformation, effectively eliminating the fatal flaws of glass encoder discs—namely fragility, poor shock resistance, and a tendency to crack under temperature fluctuations. The product withstands intense vibration and high-speed rotational impact; it operates continuously over long periods without issues such as track misalignment or disc warping, ensuring exceptional structural stability. Furthermore, it boasts a wide operating temperature range, functioning reliably in extreme environments from -40°C to 150°C. With an extremely low coefficient of thermal expansion, it maintains precision without drift and retains its structural integrity during thermal cycling, making it perfectly suited for harsh industrial production environments as well as specialized outdoor and aerospace applications.
Regarding customization and quality-controlled mass production, the electroforming process offers immense design flexibility. Incremental and absolute encoder discs can be tailored to specific equipment requirements—varying in outer diameter, aperture, number of tracks, resolution, and phase structure—while supporting non-standard customizations such as irregular shapes, high-density tracks, and multi-phase encoding to suit precision encoders of all sizes. Every product undergoes rigorous testing, including fully automated full-dimensional optical inspection, track precision verification, concentricity and roundness checks, optical signal sampling, and high/low-temperature aging tests. This ensures highly consistent precision and performance across batches, high mass-production yields, and reliable delivery, offering a complete replacement for imported precision encoder discs and facilitating the localization and upgrading of high-end measurement and control equipment.
Compared to traditional laser-etched, mechanically engraved, or glass transmissive encoder discs, electroformed reflective encoder discs leverage the unique advantages of the electroforming process to comprehensively outperform alternatives in terms of precision, stability, durability, adaptability, and cost-effectiveness. They effectively resolve industry pain points—such as insufficient precision, signal instability, fragility, significant thermal drift, and short service life—making them the preferred core component for high-end precision optoelectronic encoders and a key enabler for industrial upgrades in high-precision motion control across various sectors.
**Ultra-high forming precision that surpasses traditional encoding limits, suitable for high-end precision measurement and control.** Traditional laser-etched and mechanically machined discs are limited by their manufacturing processes, resulting in issues like burrs, jagged edges, and dimensional inconsistencies along the track boundaries. These limitations make it difficult to form high-density tracks and result in low resolution, failing to meet the demands for ultra-high precision encoding (exceeding 20 bits) and leading to problems like counting errors and positioning inaccuracies during high-speed operation. In contrast, electroformed reflective discs utilize an integrated process combining precision photolithography for master patterning with ion deposition. This achieves micron-level, error-free replication, producing tracks with straight, sharp edges and uniform dimensions. This technology easily enables the formation of ultra-high-density, fine-pitch tracks, supporting resolutions up to 24 bits. With angular detection precision far exceeding traditional products, they meet the rigorous demands of ultra-high-precision applications such as semiconductor precision alignment, surgical robotics, and aerospace measurement and control.
**Superior optical performance with stable, interference-free signals, significantly enhancing equipment measurement and control precision.** Traditional discs often suffer from uneven reflective surfaces and blurred boundaries, causing severe light scattering and a low signal-to-noise ratio. They are susceptible to ambient light and equipment vibration, leading to waveform distortion, pulse loss, and counting errors—issues that directly result in positioning drift and loss of motion control. Electroformed discs feature a uniform, highly transparent mirror-like reflective surface with distinct light-dark zones. They ensure precise optoelectronic signal acquisition and clean, regular output waveforms. With exceptional anti-interference capabilities, they maintain stable signal output during both static precision alignment and high-speed dynamic speed measurement, effectively improving closed-loop control precision and operational stability while drastically reducing equipment measurement and control failures.
**Robust mechanical performance—resistant to vibration and temperature fluctuations without deformation—resulting in a significantly extended service life.** Traditional glass encoder discs are brittle and have poor shock resistance; they can shatter upon minor impact or vibration and are prone to cracking or precision drift in extreme temperatures. Laser-etched metal discs suffer from manufacturing stresses, leading to deformation and track misalignment during long-term operation. In contrast, electroformed discs feature a dense, monolithic nickel-cobalt alloy structure free from internal stress or structural weaknesses. They offer excellent impact, vibration, and wear resistance; they remain stable without wobbling or deforming during high-speed rotation or prolonged use. With an extremely low temperature drift coefficient, they maintain constant precision across a wide temperature range. Their service life is 3–6 times that of traditional discs, significantly reducing the frequency of component replacements and equipment downtime for maintenance.
They offer high customization flexibility, making them suitable for the R&D and mass production of a full range of high-end encoders. Traditional manufacturing processes struggle to produce high-density, multi-phase, or non-standard shaped discs, resulting in slow R&D iteration that fails to meet the upgrade demands of new precision encoders. Electroforming allows for the on-demand customization of incremental and absolute discs in various specifications—supporting special apertures, irregular shapes, unique track layouts, and ultra-high resolutions. This capability rapidly meets customer needs for new product development and process iteration, drastically shortening equipment commissioning and time-to-market cycles, while aligning with trends toward miniaturization, high precision, and intelligent measurement and control equipment.
Domestic production offers a high cost-performance ratio, enabling cost reduction and efficiency gains through import substitution. High-end precision reflective encoder discs previously relied heavily on imports, entailing high procurement costs, long lead times, and delayed after-sales support, which significantly increased production costs. Domestically produced electroformed reflective discs utilize mature, proven technology; their precision, stability, and durability fully match high-end imported products. They serve as seamless replacements for imported discs, substantially lowering procurement costs. Furthermore, they support rapid prototyping, mass production, and one-on-one technical integration, backed by efficient local after-sales service. They are the premier choice for domestic high-end optical encoders and precision motion control equipment seeking to reduce costs, improve efficiency, and achieve import substitution.
