Electroformed Reflective Encoder Disc | High Precision Optical Code Disc from Zhuolida Nantong

The electroformed reflective encoder disc is a critical precision optical component for reflective optical rotary encoders, widely adopted in high-precision motion measurement and position feedback systems. As a professional manufacturer located in Nantong, China, Nantong Zhuolida specializes in custom electroformed reflective encoder discs, delivering micron-level patterned metal code discs to global customers across automation, medical, aerospace and optical instrument industries.

Unlike transmission-type code discs, electroformed reflective encoder discs work on the light reflection principle. The disc surface consists of alternating reflective and non-reflective coded tracks fabricated via photolithography and electroforming. When the encoder operates, an infrared LED emits light onto the disc surface. Light bounces back from reflective zones to the photodiode sensor, while non-reflective areas absorb light. As the disc rotates, periodic light-dark signals are captured and converted into electrical pulses. The controller calculates angular position, rotation speed and rotation direction based on these pulses, enabling real-time closed-loop motion control.

The core advantage of our electroformed reflective encoder discs lies in the mature electroforming process mastered by Nantong Zhuolida. We start with ultra-precise photolithography master patterns, then deposit nickel or nickel-cobalt alloy onto the mold through controlled electrodeposition. The coding pattern forms as an integral metal layer, no adhesive bonding required. This electroforming technology eliminates the undercut issues common in chemical etching and the burr defects from mechanical cutting. Line width and pitch can be controlled down to micrometer tolerance, ensuring clean, sharp code edges. Sharp pattern edges directly reduce signal jitter, improving encoder resolution and signal stability.

Compared with glass code discs and plastic etched discs, electroformed reflective encoder discs offer obvious benefits. Glass discs are brittle and vulnerable to shock and vibration, limiting their use in rugged industrial environments. Plastic discs easily deform under temperature fluctuations, causing pattern distortion and measurement drift. Our all-metal electroformed reflective encoder discs feature outstanding mechanical strength, vibration resistance and temperature stability. They maintain consistent optical performance under wide temperature ranges and heavy vibration. Another major merit of reflective design: the light source and photodetector are mounted on the same side of the disc. This layout shrinks encoder overall size, ideal for miniaturized servo motors, compact robotic joints and portable precision devices.

Nantong Zhuolida supports customized electroformed reflective encoder discs to meet diverse client specifications. We can tailor outer diameter, inner hole size, track number, line density and material composition according to customer drawings or technical requirements. Our products cover incremental and absolute reflective code discs for different encoder types. Strict quality inspection is implemented in every production step, including pattern dimensional checking, flatness testing and optical performance verification, to guarantee stable batch consistency for mass orders.

Our electroformed reflective encoder discs serve multiple high-end sectors. In industrial automation, they are installed on servo motors and stepper motors for production line positioning and speed monitoring. In medical equipment, they power surgical robots and diagnostic imaging instruments, where high accuracy and reliability are non-negotiable. In aerospace and precision metrology, our code discs support high-stability angle measurement. They are also popular in printing machinery, optical inspection equipment and smart motion sensors.

As global intelligent manufacturing demands higher precision and miniaturized motion sensors, the requirement for reliable electroformed reflective encoder discs keeps rising. Nantong Zhuolida keeps optimizing electroforming craftsmanship to develop code discs with higher resolution, smaller dimensions and stronger environmental adaptability. With local production base in Nantong, we provide efficient technical communication, flexible sample service and competitive lead time for overseas buyers.

If you are sourcing high-quality custom electroformed reflective encoder discs for optical encoders, welcome to contact Nantong Zhuolida. We offer professional technical support and custom solutions for your optical encoder projects.