Product Introduction:

This stainless steel encoder disc is a high precision optical disc designed for stable signal generation and accurate position detection. The precision disc offers consistent slot geometry and excellent durability, making it suitable for long-term use in encoder systems. As a dependable encoder disc, it meets the needs of high-performance applications.

Applications:

Encoder systems, servo motors, industrial automation, robotics, precision control equipment

In the world of precision motion control, the Stainless Steel Encoder Disc is a critical component. It acts as the "ruler" for optical sensors, translating physical rotation into digital data. But how do we transform a raw sheet of metal into a High Precision Optical Component with micron-level accuracy?

The answer lies in Chemical Etching (also known as Photo Chemical Machining). Unlike traditional stamping or laser cutting, this process uses corrosive chemicals and light to remove material. At our factory, we have refined this process to ensure burr-free, stress-free, and highly accurate results. Let's take a look behind the curtain at how we manufacture these vital components.

Step 1: Material Preparation & Cleaning
Every great product starts with a clean foundation. We begin with high-grade stainless steel coils or sheets (typically SUS304 or SUS316).

• The Process: The metal is thoroughly cleaned to remove any oils, oxides, or contaminants.
• Why it matters: Any dirt on the surface can prevent the photoresist from adhering properly, leading to defects. A pristine surface is essential for a high-quality Stainless Steel Encoder Disc.

Step 2: Photoresist Lamination
Once clean, the metal is laminated with a light-sensitive polymer called "photoresist."

• The Process: This film is applied uniformly to both sides of the metal sheet.
• Why it matters: This layer acts as a shield. It protects the areas of the metal that we want to keep, leaving only the areas we want to remove exposed for the next step.

Step 3: Exposure (Imaging)
This is where the design comes to life. We use a phototool (a high-resolution film negative of your design) to transfer the pattern.

• The Process: The laminated sheet is sandwiched between the phototool and a UV light source. The UV light hardens the resist in the shape of the encoder disc pattern.
• Why it matters: This step defines the accuracy of the High Precision Optical Component. Our digital tooling allows for rapid design changes without the cost of hard dies.

Step 4: Developing
After exposure, the sheet is sprayed with a developing solution.

• The Process: This washes away the unhardened photoresist, revealing the bare metal underneath where the slots and holes need to be.
• Why it matters: The result is a precise "stencil" on the metal, ready for etching.

Step 5: Chemical Etching
This is the core of our operation. The developed sheets are conveyed through an etching chamber where high-pressure nozzles spray corrosive chemicals (typically Ferric Chloride) onto the metal.

• The Process: The chemical eats away the exposed bare metal, while the hardened resist protects the rest.
• Why it matters: Unlike mechanical punching, which pushes metal and creates burrs, chemical etching dissolves the metal atom by atom. This results in a Stainless Steel Encoder Disc with perfectly smooth edges and zero mechanical stress.

Step 6: Stripping & Inspection
The final step is to remove the remaining photoresist and clean the parts.

• The Process: The parts are stripped, washed, and dried. They then undergo rigorous inspection using optical projection and CMM machines.
• Why it matters: We verify that every slot width and pitch measurement meets the strict tolerances required for optical applications.

Comparison: Etching vs. Traditional Methods
Why do we choose chemical etching for High Precision Optical Components?

Why This Process Matters for You
By mastering the chemical etching process, we can offer you:

• Complex Geometries: We can etch intricate optical patterns that are impossible with punches.
• Durability: The stress-free nature of etching means the stainless steel retains its natural hardness and flatness.
• Cost-Effectiveness: No hard tooling means lower upfront costs and faster turnaround times for prototypes and production runs.

Ready to See Your Design in Metal?

Understanding our process helps you understand the quality we deliver. If you have a design for a Stainless Steel Encoder Disc or need a High Precision Optical Component manufactured, we are ready to help.

Contact us today to discuss your project specifications.

Get in touch with us:

• Contact Person: Luna
• Company: NKEYTO (Shenzhen Xintu Precision Hardware Co., Ltd.)
• WhatsApp: 12132219094

Frequently Asked Questions (FAQ)

Q1: What is the typical tolerance for your etched encoder discs?
A: We typically hold a tolerance of ±0.02mm (or ±10% of material thickness). For a High Precision Optical Component, this level of accuracy ensures that the optical slots are perfectly positioned for reliable signal reading.

Q2: Does the etching process weaken the stainless steel?
A: No. Unlike laser cutting, which uses heat and can alter the material's grain structure (creating a Heat Affected Zone), chemical etching is a "cold" process. It does not change the physical properties or hardness of the Stainless Steel Encoder Disc.

Q3: Can you etch very thin materials?
A: Yes. Chemical etching is ideal for thin materials. We can process stainless steel as thin as 0.05mm without warping or deformation, which is crucial for lightweight, high-speed encoder applications.

Q4: How does this process affect the edge quality?
A: It produces superior edge quality. The chemical spray dissolves the metal smoothly, leaving edges that are virtually burr-free. This is essential for optical components where light scattering must be minimized.