---
title: "Dancer Arm Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DANCER_ARM_ASSEMBLY"
  data_integrity_hash: "802c47b8475a5fb1d167f4339b231ac6"
  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:DANCER_ARM_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/dancer-arm-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/dancer-arm-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 kN tension force, 50-200 mm linear travel, -10°C to 80°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3.0
    unit: "kN"
    consequence: "Plastic deformation of pivot pins exceeding 250 MPa yield strength, linear guide rail binding at 0.01 mm particulate contamination threshold, ball bearing seizure at 120°C lubricant flash point"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Harmonic vibration at 15-25 Hz resonance frequency matching arm natural frequency"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Dynamic vibration absorber tuned to 20 Hz with 0.7 damping ratio, shot peening to induce 400 MPa compressive residual stress"
  - node_2:
      trigger: "Electrostatic discharge accumulation exceeding 8 kV on fabric surface"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Conductive carbon fiber brush discharge system with 1 MΩ current limiting, Faraday cage shielding of sensor electronics"
bom_nodes:
  arm-bracket:
    type: "component"
    urn: "URN:CNFX:ME:ARM_BRACKET"
    interface_type: "physical-logic-coupled"
  pivot-shaft:
    type: "component"
    urn: "URN:CNFX:ME:PIVOT_SHAFT"
    interface_type: "physical-logic-coupled"
  linkage-rods:
    type: "component"
    urn: "URN:CNFX:ME:LINKAGE_RODS"
    interface_type: "physical-logic-coupled"
  mounting-plate:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_PLATE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/dancer-arm-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "4cf2542e369e3e8b28ad174e6ae4ba1db78f36b281fb6f74e0b35dc09a5ca1ab"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Dancer Arm Assembly

## 1. Technical Definition
A mechanical assembly that supports and positions the dancer roll in fabric tension control systems.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 kN tension force, 50-200 mm linear travel, -10°C to 80°C ambient temperature**. Failure boundary: **3.0 kN static load yield point (AISI 304 stainless steel), 250 mm travel limit switch engagement, 90°C bearing grease thermal breakdown**, Mechanism: **Plastic deformation of pivot pins exceeding 250 MPa yield strength, linear guide rail binding at 0.01 mm particulate contamination threshold, ball bearing seizure at 120°C lubricant flash point**.

### 2.1 Analytical Physics Model
Governed by the **Harmonic Vibration Force Generation**:

> **Primary Equation**: $F_e = m \cdot r \cdot \omega^2 \sin(\omega t)$  
> **Engineering Impact**: Calculates centrifugal force for vibratory sifters/feeders.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| m | Eccentric Mass | Engineering Constant |
| r | Radius | Engineering Constant |
| \omega | Angular Frequency | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Harmonic vibration at 15-25 Hz resonance frequency matching arm natural frequency | 8 | Fatigue fracture at pivot pin fillet radius (stress concentration factor Kt=2.8) | Dynamic vibration absorber tuned to 20 Hz with 0.7 damping ratio, shot peening to induce 400 MPa compressive residual stress |
| Electrostatic discharge accumulation exceeding 8 kV on fabric surface | 8 | Position sensor Hall effect IC latch-up at 50 mA surge current | Conductive carbon fiber brush discharge system with 1 MΩ current limiting, Faraday cage shielding of sensor electronics |

## 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**: **Tension Control System**, **Fabric Unwinding Roll Stand**, **Fabric Rewinding Roll Stand**  
**Downstream Applications**: Textile Fabrics, Plastic Films, Paper Rolls  

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

### Q: What materials are available for the dancer arm assembly?
**A**: Our dancer arm assemblies are manufactured in carbon steel, stainless steel, and aluminum alloy to suit different environmental conditions and load requirements.

### Q: What components are included in the dancer arm assembly BOM?
**A**: The bill of materials includes an arm bracket, linkage rods, mounting plate, and pivot shaft for complete mechanical assembly.

### Q: How does the dancer arm assembly improve fabric tension control?
**A**: The assembly precisely supports and positions the dancer roll, maintaining consistent fabric tension throughout production processes to prevent defects and ensure quality.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Dancer Arm Assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/dancer-arm-assembly)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: DANCER_ARM_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: ea8c86e2
