---
title: "Scale"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SCALE"
  data_integrity_hash: "a582a802a5e2c0de60298e8a47f1aaa9"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:SCALE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/scale.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/scale"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-100 μm resolution, 0.1-1000 mm measurement length, -10°C to 60°C operating temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 15
    unit: "ppm"
    consequence: "Differential thermal expansion between glass substrate (α=8.5×10⁻⁶/K) and chromium grating (α=4.9×10⁻⁶/K) causing grating pitch distortion; Rayleigh scattering from surface contaminants exceeding 0.5% reflectance"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Photodiode array exposure to 1000 lux ambient light interference"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrated optical bandpass filter with 650±5 nm transmission window and 40 dB out-of-band rejection"
  - node_2:
      trigger: "Mechanical mounting stress exceeding 50 MPa at adhesive interface"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Stress-relieved mounting design with 0.1 mm epoxy adhesive layer and 2:1 aspect ratio constraint"
bom_nodes:
  graduation-marks:
    type: "component"
    urn: "URN:CNFX:ME:GRADUATION_MARKS"
    interface_type: "physical-logic-coupled"
  substrate:
    type: "component"
    urn: "URN:CNFX:ME:SUBSTRATE"
    interface_type: "physical-logic-coupled"
  protective-coating:
    type: "component"
    urn: "URN:CNFX:ME:PROTECTIVE_COATING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/scale.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "c09ec379567be5e7fdadf6a091b8219440d0263462b9df4692e98b294ac7ff42"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Scale

## 1. Technical Definition
The graduated measuring element of a linear encoder that provides positional reference marks.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-100 μm resolution, 0.1-1000 mm measurement length, -10°C to 60°C operating temperature**. Failure boundary: **Thermal expansion exceeding 15 ppm/K at 80°C, contamination particles &gt;0.5 μm, optical signal-to-noise ratio &lt;20 dB**, Mechanism: **Differential thermal expansion between glass substrate (α=8.5×10⁻⁶/K) and chromium grating (α=4.9×10⁻⁶/K) causing grating pitch distortion; Rayleigh scattering from surface contaminants exceeding 0.5% reflectance**.

### 2.1 Analytical Physics Model
Governed by the **Combined Measurement Uncertainty**:

> **Primary Equation**: $u_c = \sqrt{\sum u_i^2}$  
> **Engineering Impact**: Defines the precision confidence interval for inspection.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| u_i | Standard Uncertainty components | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Photodiode array exposure to 1000 lux ambient light interference | 8 | Signal-to-noise ratio degradation below 20 dB causing positional error &gt;1 μm | Integrated optical bandpass filter with 650±5 nm transmission window and 40 dB out-of-band rejection |
| Mechanical mounting stress exceeding 50 MPa at adhesive interface | 8 | Grating pitch distortion &gt;50 nm/mm causing nonlinear positional error | Stress-relieved mounting design with 0.1 mm epoxy adhesive layer and 2:1 aspect ratio constraint |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Linear Encoder Reader Head**, **Precision Mounting Fixture**, **Clean Room Environment Control System**  
**Downstream Applications**: CNC Machine Tools, Coordinate Measuring Machines, Semiconductor Manufacturing Equipment  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are best for encoder scales in harsh industrial environments?
**A**: Stainless steel scales offer excellent corrosion resistance, while ceramic scales provide superior hardness and thermal stability for extreme conditions.

### Q: How do protective coatings enhance encoder scale performance?
**A**: Protective coatings prevent oxidation, reduce friction, and shield graduation marks from wear, ensuring long-term measurement accuracy in machinery applications.

### Q: What factors determine the choice between glass and metal encoder scales?
**A**: Glass scales offer higher resolution for precision applications, while metal scales provide better durability and shock resistance in heavy machinery environments.

## 6. Manufacturing Compliance
- ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Scale](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/scale)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: SCALE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 0cb47aeb
