Laser Beam Power Detection for CNC Interference Response

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Solution Overview

Problem

Computer numerically controlled machines, such as 3-D printers and laser cutters, face challenges in detecting and responding to misdirected electromagnetic beams, which can cause interference and potentially damage the machine or lead to unintended changes in the material being processed.

Innovation Solution

Incorporating a beam detector that measures the power of electromagnetic energy at various points along its path to detect interferences, allowing for actions such as disabling the source, engaging an interlock, or sending notifications when the beam's power falls below a threshold, thereby preventing damage and ensuring safe operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a beam detector is incorporated to measure electromagnetic energy power, then safety and reliability are improved, but device complexity increases

Engineering Contradiction:
ImprovesafetyVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

A beam detector is introduced as an intermediary component between the electromagnetic beam source and the processing target. The detector continuously monitors beam power and provides feedback signals to control the beam source, enabling automatic safety protection without requiring complex manual intervention systems.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The system implements a feedback mechanism where the beam detector measures electromagnetic energy power in real-time and sends signals back to the beam source controller. When the beam strays from its intended path or exceeds safe power levels, the feedback loop automatically adjusts or shuts down the beam source to prevent damage.

Inventive Principle:
Principle #23Feedback

2Manufacturing precision

If real-time beam detection is implemented, then manufacturing precision is improved, but loss of time increases

Engineering Contradiction:
Improveprocessing accuracyVSAvoiddetection time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The beam detector operates continuously throughout the entire beam processing operation, maintaining constant monitoring without interrupting the manufacturing process. This continuous detection ensures immediate identification of beam deviations while minimizing detection delays.

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

The system performs preliminary detection by measuring beam power at multiple points along the intended beam path before the beam reaches the processing target. This advance detection allows the system to identify potential issues early and respond before precision is compromised.

Inventive Principle:
Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution effectively prevents damage to the machine and ensures accurate processing by detecting and responding to interferences in real-time, enhancing the safety and efficacy of computer numerically controlled manufacturing processes.

Implementation Method 1

The beam detector may be configured to measure the power of the beam of electromagnetic energy by least measuring a power of a backscatter from the beam of electromagnetic energy interacting with one or more components at the head of the computer numerically controlled machine

Methodology Applied
Scientific EffectBackscatter: Scattering

Implementation Method 2

The beam detector may be configured to measure the power of the beam of electromagnetic energy by at least measuring a power of one or more divergent rays scattered from the beam of electromagnetic energy

Methodology Applied
Scientific EffectScattering: Scattering

Data Source

PatentUS11747193B2Laser fabrication with beam detection
Publication Date: 2023.09.05 MAKEBLOCK HONGKONG HOLDING LTD
  • US11747193B2 patent drawing
  • US11747193B2 patent drawing
  • US11747193B2 patent drawing

AI summary

A computer numerically controlled machine may include a source of electromagnetic energy. A beam of electromagnetic energy from the source may be delivered to a destination such as, for example, a material positioned in a working area of the computer numerically controlled machine. The beam of electromagnetic energy may be susceptible to interferences while traveling from the source to the destination. The computer numerically controlled machine may include a beam detector configured detect an interference of the beam by measuring a power of the beam of electromagnetic energy at a location between the source and the destination. An interference of the beam may be detected if the power of the beam is less than a threshold value. A controller at the computer numerically controlled machine may perform one or more actions in response to the beam detector detecting the interference of the beam of electromagnetic energy.