Laser cutting tolerancing

Circuit Break Podcast #366

Laser Cutting Tolerancing

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Tour MacroFab's ITAR-Compliant Facility

February 17, 2023, Episode #366

They may be known for being electrical engineers but on this episode, Parker and Stephen dig into the more mechanical aspects of their current projects

MacroFab News

  • May 4th, Bringing back the MacroFab meetup.
  • MacroFab moved into the new headquarters and we already produced our first products!

Checker Battery Box

  • Materials arrived Monday, will need to weld it
  • Designing for laser cutting / welding

New Project Car - 2021 Chevy Express 4500

  • RV / Camper / Tow Rig build

The CNC is coming together!

  • Finally got all of the extrusions
  • Been taking my time and savoring it.
  • Have to rearrange basement to get everything to fit
  • 4 rounds of buying hardware
  • What remains
    • Get the drive electronics
    • Get the ball screws
      • SFU2010 - 2000mm and 1950mm for the X and Y axis C7 grade
      • Dual x drive - slave axis
    • Build the electronics cabinet
      • NVEM ethernet stepper controller.
    • Run all of the wire management
  • 8020 3d printed cable management
    • First attempt is good but needs some adjustment
    • Probably too tight
    • Add tabs that will allow you to turn it by hand when in the slot
    • Add some features that slowly allow it to engage with the slot instead of all at once
Cnc 366 01
Cnc 366 02
Cnc 366 03

About the Hosts

Parker Dillmann
  Parker Dillmann

Parker is an Electrical Engineer with backgrounds in Embedded System Design and Digital Signal Processing. He got his start in 2005 by hacking Nintendo consoles into portable gaming units. The following year he designed and produced an Atari 2600 video mod to allow the Atari to display a crisp, RF fuzz free picture on newer TVs. Over a thousand Atari video mods where produced by Parker from 2006 to 2011 and the mod is still made by other enthusiasts in the Atari community.

In 2006, Parker enrolled at The University of Texas at Austin as a Petroleum Engineer. After realizing electronics was his passion he switched majors in 2007 to Electrical and Computer Engineering. Following his previous background in making the Atari 2600 video mod, Parker decided to take more board layout classes and circuit design classes. Other areas of study include robotics, microcontroller theory and design, FPGA development with VHDL and Verilog, and image and signal processing with DSPs. In 2010, Parker won a Ti sponsored Launchpad programming and design contest that was held by the IEEE CS chapter at the University. Parker graduated with a BS in Electrical and Computer Engineering in the Spring of 2012.

In the Summer of 2012, Parker was hired on as an Electrical Engineer at Dynamic Perception to design and prototype new electronic products. Here, Parker learned about full product development cycles and honed his board layout skills. Seeing the difficulties in managing operations and FCC/CE compliance testing, Parker thought there had to be a better way for small electronic companies to get their product out in customer's hands.

Parker also runs the blog, longhornengineer.com, where he posts his personal projects, technical guides, and appnotes about board layout design and components.

Stephen Kraig
  Stephen Kraig

Stephen Kraig is a component engineer working in the aerospace industry. He has applied his electrical engineering knowledge in a variety of contexts previously, including oil and gas, contract manufacturing, audio electronic repair, and synthesizer design. A graduate of Texas A&M, Stephen has lived his adult life in the Houston, TX, and Denver, CO, areas.

Stephen has never said no to a project. From building guitar amps (starting when he was 17) to designing and building his own CNC table to fine-tuning the mineral composition of the water he uses to brew beer, he thrives on testing, experimentation, and problem-solving. Tune into the podcast to learn more about the wacky stuff Stephen gets up to.

Special thanks to whixr over at Tymkrs for the intro and outro!

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