S2E20 Load Cells, Strain Gauges, & Learning Strategies | Robert Fuge

Being an Engineer · 30 Apr 2021 · 48m · Episode 20

What this episode covers

Robert Fuge, founder of Epsilon Laboratory, explains the physics and manufacturing of load cells and strain gauges, detailing how they measure material deformation via resistance changes in a Wheatstone bridge. He discusses the highly manual, craft-intensive production process required for high-precision instruments, noting that automation is difficult due to the need for individual temperature compensation and calibration. Fuge highlights common implementation errors, such as off-center loading and thermal drift, and advises engineers to perform in-situ calibration and warm-up periods to ensure data accuracy. He also advocates for a balanced approach between Finite Element Analysis (FEA) and physical testing, mentioning software like True Load to optimize sensor placement.

Mentioned

Companies
Epsilon Laboratory, Honeywell Interface, Pipeline Design & Engineering, Wolf Star Technologies, Boeing, Raytheon
Products
True Load
Also
NIST

Other shows on the same ground, closest first.

  • Embedded.fm · 1h 22m

    154: Physics Is a Big Pain

    Jeff Keyzer, an electrical engineer at Valve and founder of the open-source electronics kit company MightyOhm, discusses the challenges of designing and manufacturing consumer hardware like the Steam Controller. He shares insights on the importance of clear specifications for vendors, the difficulties of managing complex electromechanical assemblies, and the critical role of embedded software in facilitating manufacturing test and programming. Keyzer also provides detailed technical advice on soldering techniques, flux selection, and the physics of RF antenna design.

  • Embedded.fm · 1h 10m

    236: The Concept of Delayed Gratification (Repeat)

    Roger Linn, founder of Roger Linn Design, discusses the engineering behind the LinnStrument, an expressive electronic instrument featuring 200 3D-sensing pads that measure pressure, pitch, and timbre. He explains how he uses force-sensing resistors (FSRs) printed on Mylar sheets and a key matrix scanning technique to achieve low-latency, polyphonic control, while managing the N-key rollover limitation through software. Linn also details his business model as a solo founder, his use of Raspberry Pi Compute Modules for cost-effective embedded systems, and his advice for hardware entrepreneurs to prototype using existing low-cost components rather than commissioning expensive custom builds.

  • TRADEOFFS · 59m

    T-24-005 : Kaleen Canevari - Mechanical Engineer to Connected Fitness CEO

    Kaleen Canevari, founder and CEO of Flexia, discusses building the world's first smart Pilates reformer, detailing her transition from mechanical engineering to navigating venture capital dynamics and manufacturing challenges. She explains how Flexia uses sensors to measure load, distance, and speed to generate a Movement Quality Score (MQS), creating proprietary metrics for Pilates performance. Canevari shares the trade-offs of launching during the pandemic, including initial US manufacturing failures, shifting to China for better quality and unit economics, and the strategic decision to focus on direct-to-consumer sales rather than complex B2B studio integrations. She also reflects on the importance of founder-led marketing, the pitfalls of accelerator advice for hardware, and the discipline required to manage product scope and team growth.

  • The Amp Hour · 1h 35m

    New Year Education

    Chris Gammell of Freak Labs and Hacker Farm discusses his work on sensor networks for rice paddy and boar trap monitoring, detailing the use of 3G modems and Python back-ends. He and host Dave Jones critique the traditional education system, advocating for creative, practical learning over rigid testing, and discuss the challenges of hardware startups, including manufacturing risks in China and the importance of community. Gammell also shares insights on overcoming depression and imposter syndrome in the tech industry by focusing on collaboration and simple, meaningful projects like interactive children's books.

  • Let's Combinate · 1h 01m

    004 - “Until They Know How Much You Care” with Andy Robertson

    Andy Robertson, founder of CQE Academy, explains his transition from a career in medical device engineering at Alcon to full-time education, detailing how he uses the Feynman technique and specific study habits to help students pass the CQE exam. He shares anecdotes from his time at Alcon, including implementing Design of Experiments (DOE) and Statistical Process Control (SPC) using Infinity QS, to demonstrate the practical value of quality engineering principles. Robertson emphasizes leadership philosophy, citing mentors like Scott Brown and Julie Geller, and stresses that caring for people is the foundation of effective management and teaching.

The summary, chapters and topics are generated from the episode’s audio by this directory, not written by Being an Engineer. The episode itself belongs to its publisher.