# Ep076: Grinding Compression Screws, Scratching PCBs, and Melting Foam

- Show: [Hackaday Podcast](https://hardwarepodcasts.com/podcast/hackaday-podcast)
- Published: 2020-07-17
- Length: 55m
- Page: https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam
- Listen: https://hackaday.libsyn.com/ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam

## Summary

Hackaday editors Mike Szczys and Elliot Williams discuss several fabrication hacks, including Robin De Bruy's method of scratching PCB traces with a CNC scriber to achieve finer isolation than milling, and Joshua Pearce’s open-source design for grinding compression screws for plastic extruders. They also cover Freddy’s interactive CNC foam cutter art installation, Donald Pap’s library for matching bottle cap threads in OpenSCAD, and Michael Engel’s bare-metal Smalltalk operating system on a Raspberry Pi. The episode concludes with a deep dive into hard drive recovery using DDRescue and troubleshooting the Arduino IDE's serial buffer configuration.

## Chapters

- [0:01](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=1) Introduction and Grant Imahara Tribute
- [2:51](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=171) Comet NEOWISE and Hackaday Prize Dream Teams
- [6:13](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=373) Scratching PCBs with a CNC Scriber
- [13:55](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=835) Matching Bottle Cap Threads in OpenSCAD
- [15:57](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=957) Smalltalk OS on Raspberry Pi and Project Oberon
- [22:40](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=1360) Interactive CNC Foam Cutter Art Installation
- [27:01](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=1621) Open Source Compression Screw Grinder
- [31:00](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=1860) Low Power Rotary Encoder for Roland JV-1080
- [35:17](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=2117) Quick Hacks: Home Automation, LED Sphere, and Radio Reverse Engineering
- [39:49](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-07-17-ep076-grinding-compression-screws-scratching-pcbs-and-melting-foam#t=2389) Hard Drive Recovery with DDRescue and Arduino IDE Hacking

## Topics

- [PCB design & layout](https://hardwarepodcasts.com/topic/pcb-design)
- [Fabrication & craft](https://hardwarepodcasts.com/topic/fabrication-and-craft)
- [Embedded firmware](https://hardwarepodcasts.com/topic/embedded-firmware)
- [EDA & CAD tools](https://hardwarepodcasts.com/topic/eda-and-cad-tools)
- [Debugging & failure analysis](https://hardwarepodcasts.com/topic/debugging-and-failure-analysis)

## Most relevant to

makers and hobbyists

## Mentioned

- Robin De Bruy (other)
- Joshua Pearce (other)
- Jacob France (other)
- Donald Pap (other)
- Michael Engel (other)
- Freddy (other)
- Mitzella (other)
- ATtiny85 (chip)
- LS7183 (chip)
- Raspberry Pi (chip)
- OpenSCAD (tool)
- DDRescue (tool)
- Arduino IDE (tool)
- Home Assistant (other)
- Roland JV-1080 (product)
- Kenwood TH-D74A (product)
- Pulsar (product)
- TS100 (product)
- Project Oberon (other)
- Smalltalk (other)

## Related episodes from other shows

- [062 - Keymap Rain Dance](https://hardwarepodcasts.com/podcast/unnamed-reverse-engineering-podcast/2022-12-30-062-keymap-rain-dance) (Unnamed Reverse Engineering Podcast)
- [#440.2 - Interviews with Greg Davill and Michael Ossmann](https://hardwarepodcasts.com/podcast/the-amp-hour/2019-05-01-440-2-interviews-with-greg-davill-and-michael-ossmann) (The Amp Hour)
- [343: Getting Brains to Work](https://hardwarepodcasts.com/podcast/embedded-fm/2020-09-04-343-getting-brains-to-work) (Embedded.fm)
- [#440.3 - Interviews with Anool Mahidharia, AJ Keller, Uriel Guy, Ste Kulov, and Craig Bishop at KiCon 2019](https://hardwarepodcasts.com/podcast/the-amp-hour/2019-05-04-440-3-interviews-with-anool-mahidharia-aj-keller-uriel-guy-ste-kulov-and-craig-b) (The Amp Hour)
- [419: Fission Chips](https://hardwarepodcasts.com/podcast/embedded-fm/2022-06-30-419-fission-chips) (Embedded.fm)

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