---
title: "Touch-Trigger Probe"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:TOUCH_TRIGGER_PROBE"
  data_integrity_hash: "1efbbb16e18f7f3346f9451e10046ddb"
  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:TOUCH_TRIGGER_PROBE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/touch-trigger-probe.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/touch-trigger-probe"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 N contact force, 0.1-1.0 μm deflection range"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3.0
    unit: "N"
    consequence: "Plastic deformation of ruby stylus sphere (Mohs hardness 9) due to Hertzian contact stress exceeding 2.5 GPa yield strength, or spring steel fatigue from cyclic loading exceeding 700 MPa endurance limit"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Electrostatic discharge (ESD) exceeding 15 kV during handling"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Shielded coaxial cable routing with 1 MΩ grounding resistor and Faraday cage enclosure"
  - node_2:
      trigger: "Thermal expansion mismatch between aluminum housing (23×10⁻⁶/°C) and ceramic insulator (7×10⁻⁶/°C)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Invar 36 alloy kinematic mount (1.2×10⁻⁶/°C) with silicone thermal interface material"
bom_nodes:
  stylus:
    type: "component"
    urn: "URN:CNFX:ME:STYLUS"
    interface_type: "physical-logic-coupled"
  kinematic-seat:
    type: "part"
    urn: "URN:CNFX:ME:KINEMATIC_SEAT"
    interface_type: "physical-logic-coupled"
  electrical-contacts:
    type: "component"
    urn: "URN:CNFX:ME:ELECTRICAL_CONTACTS"
    interface_type: "physical-logic-coupled"
  housing:
    type: "component"
    urn: "URN:CNFX:ME:HOUSING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 10360-2:2009 - ACCEPTANCE AND REVERIFICATION TESTS FOR COORDINATE MEASURING MACHINES (CMMS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/touch-trigger-probe.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "baef5a70f059df51fcadc5503d8632f617bf8bc2b1c9380ed87dff45c8c9f138"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Touch-Trigger Probe

## 1. Technical Definition
A precision sensor component used in coordinate measuring machines (CMMs) that detects physical contact with a workpiece to initiate measurement data capture.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 N contact force, 0.1-1.0 μm deflection range**. Failure boundary: **3.0 N contact force causing permanent ruby stylus deformation or 2.0 μm deflection exceeding spring mechanism elastic limit**, Mechanism: **Plastic deformation of ruby stylus sphere (Mohs hardness 9) due to Hertzian contact stress exceeding 2.5 GPa yield strength, or spring steel fatigue from cyclic loading exceeding 700 MPa endurance limit**.

### 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 |
| :--- | :--- | :--- | :--- |
| Electrostatic discharge (ESD) exceeding 15 kV during handling | 8 | Piezoelectric crystal depolarization causing 0.01 μm measurement drift | Shielded coaxial cable routing with 1 MΩ grounding resistor and Faraday cage enclosure |
| Thermal expansion mismatch between aluminum housing (23×10⁻⁶/°C) and ceramic insulator (7×10⁻⁶/°C) | 8 | 0.5 μm positional error at 25°C temperature gradient | Invar 36 alloy kinematic mount (1.2×10⁻⁶/°C) with silicone thermal interface material |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Kinematic Seat](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/kinematic-seat.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Coordinate Measuring Machine (CMM)**, **Calibration Station**, **Clean Room Environment**  
**Downstream Applications**: Aerospace Components, Automotive Engine Parts, Medical Implants  

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

### Q: What materials are used in touch-trigger probes for durability?
**A**: Touch-trigger probes are constructed from high-wear materials including tungsten carbide for styli, sapphire for contact tips, stainless steel for housings, and ceramic for insulating components to ensure precision and longevity in industrial environments.

### Q: How does a touch-trigger probe work in coordinate measuring machines?
**A**: When the probe's stylus makes physical contact with a workpiece, it triggers an electrical signal through the kinematic seat and contacts, initiating immediate data capture by the CMM for dimensional measurement and quality control.

### Q: What are the key components in a touch-trigger probe BOM?
**A**: The bill of materials includes the stylus for contact, housing for protection, kinematic seat for precise movement, and electrical contacts for signal transmission—all engineered for repeatable measurement accuracy in manufacturing applications.

## 6. Manufacturing Compliance
- ISO 10360-2:2009 - ACCEPTANCE AND REVERIFICATION TESTS FOR COORDINATE MEASURING MACHINES (CMMS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Touch-Trigger Probe](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/touch-trigger-probe)**

### 🌐 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**: TOUCH_TRIGGER_PROBE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 1b31bd82
