---
title: "Dancer Arm"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DANCER_ARM"
  data_integrity_hash: "1a3e1da0b2fc69e74d2a8e1549ad8304"
  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"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/dancer-arm.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/dancer-arm"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-15 NÂ·m torque, 0-120Â° angular displacement, 0.1-2.0 m/s linear velocity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 18
    unit: "NÂ"
    consequence: "Yield strength of AISI 4140 steel (415 MPa) exceeded at 18 NÂ·m torque, bearing clearance violation (0.05 mm maximum) at 135Â° displacement, natural frequency excitation (8.3 Hz) at 2.5 m/s velocity"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic pressure surge exceeding 210 bar in tension cylinder"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate 200 bar pressure relief valve with 10 ms response time"
  - node_2:
      trigger: "Encoder signal loss for &gt;500 ms duration"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement dual redundant absolute encoders with 250 ms failover"
bom_nodes:
  pivot-bracket:
    type: "component"
    urn: "URN:CNFX:ME:PIVOT_BRACKET"
    interface_type: "physical-logic-coupled"
  arm-body:
    type: "component"
    urn: "URN:CNFX:ME:ARM_BODY"
    interface_type: "physical-logic-coupled"
  dancer-roll-mount:
    type: "component"
    urn: "URN:CNFX:ME:DANCER_ROLL_MOUNT"
    interface_type: "physical-logic-coupled"
  sensor-mounting-plate:
    type: "component"
    urn: "URN:CNFX:ME:SENSOR_MOUNTING_PLATE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/dancer-arm.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "d54ed73ea4ff3a224382aee5b29032d82e9b21311033e3be8136f5598cfdd86b"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Dancer Arm

## 1. Technical Definition
A mechanical arm used in tension control systems to maintain consistent material tension during processing.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-15 NÂ·m torque, 0-120Â° angular displacement, 0.1-2.0 m/s linear velocity**. Failure boundary: **Torque exceeding 18 NÂ·m causes permanent deformation of arm linkage, angular displacement beyond 135Â° results in bearing seizure, velocity above 2.5 m/s induces harmonic resonance**, Mechanism: **Yield strength of AISI 4140 steel (415 MPa) exceeded at 18 NÂ·m torque, bearing clearance violation (0.05 mm maximum) at 135Â° displacement, natural frequency excitation (8.3 Hz) at 2.5 m/s velocity**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic pressure surge exceeding 210 bar in tension cylinder | 8 | Piston seal extrusion and hydraulic fluid leakage | Integrate 200 bar pressure relief valve with 10 ms response time |
| Encoder signal loss for &gt;500 ms duration | 8 | Position control loop instability causing overshoot &gt;5% | Implement dual redundant absolute encoders with 250 ms failover |

## 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 Controller**, **Unwind/Reel Stand**, **Material Guide System**  
**Downstream Applications**: Coated Fabrics, Printed Films, Laminated Materials  

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

### Q: What materials are available for the Dancer Arm?
**A**: The Dancer Arm is available in carbon steel, stainless steel, and aluminum alloy to suit different industrial environments and load requirements.

### Q: How does the Dancer Arm maintain consistent material tension?
**A**: The Dancer Arm uses a mechanical arm with a dancer roll that responds to material tension variations, automatically adjusting to maintain consistent tension during processing operations.

### Q: What are the main components of the Dancer Arm?
**A**: Key components include the pivot bracket, arm body, dancer roll mount, and sensor mounting plate, which work together to provide precise tension control in manufacturing systems.

## 6. Manufacturing Compliance

---
### ðŸ› ï¸ Engineering Resource Access
ðŸ”— **[Full Specification: Dancer Arm](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/dancer-arm)**

### ðŸŒ 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 | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 923f8160
