
MEP EP#213: My CNC Will Melt In Your Mouth
02/26/20 • 58 min
MEP EP#213: My CNC Will Melt In Your Mouth
Parker
- Going to be doing Webinars for MacroFab.
- How MFs tools make you a better electrical engineer and supply chain manager
- Learning AutoDesk Fusion360
- Getting pretty good
- Learning from Youtube and Stephen
- Can be almost as fast and proficient as Parker was in Sketchup
- Getting pretty good
- Braze it 420
- Learning to braze brass radiators and steel gas tanks
- Make sure there is no gas fumes!
Stephen
- CNC
- Trying to buck the standard
- Jointer/Planer -> table -> electrical work -> table saw -> torsion box -> gantry restoration -> new spindle
- New 220V for the following
- Welding
- Brewing
- CNC machine
- Fermentation controller
- Audibles on some design characteristics
- Switches/encoders
- Probably going to go with wiring instead of all PCB mount
- Footprints for Solid State Relays
Rapid Fire Opinion
- Raspberry pi 4 release fixes the USB problem
- This is being treated as a “design for manufacturability” change
- Lumped along with some silkscreen changes to avoid solder bridging and the SD card voltage switch moving
- Why not fully announce this?
- Chinese Tariff Exemption for 2- and 4-layer PCBs
- Valid until Aug. 7, 2020
- Fisher & Paykel PCB Silkscreen Design
- The sad faces are where the hand insert components go
- If any sad faces are showing, the operator hasn't finished their job.
MEP EP#213: My CNC Will Melt In Your Mouth
Parker
- Going to be doing Webinars for MacroFab.
- How MFs tools make you a better electrical engineer and supply chain manager
- Learning AutoDesk Fusion360
- Getting pretty good
- Learning from Youtube and Stephen
- Can be almost as fast and proficient as Parker was in Sketchup
- Getting pretty good
- Braze it 420
- Learning to braze brass radiators and steel gas tanks
- Make sure there is no gas fumes!
Stephen
- CNC
- Trying to buck the standard
- Jointer/Planer -> table -> electrical work -> table saw -> torsion box -> gantry restoration -> new spindle
- New 220V for the following
- Welding
- Brewing
- CNC machine
- Fermentation controller
- Audibles on some design characteristics
- Switches/encoders
- Probably going to go with wiring instead of all PCB mount
- Footprints for Solid State Relays
Rapid Fire Opinion
- Raspberry pi 4 release fixes the USB problem
- This is being treated as a “design for manufacturability” change
- Lumped along with some silkscreen changes to avoid solder bridging and the SD card voltage switch moving
- Why not fully announce this?
- Chinese Tariff Exemption for 2- and 4-layer PCBs
- Valid until Aug. 7, 2020
- Fisher & Paykel PCB Silkscreen Design
- The sad faces are where the hand insert components go
- If any sad faces are showing, the operator hasn't finished their job.
Previous Episode

MEP EP#212: The End of Electronics Manufacturing?!
MEP EP#212: The End of Electronics Manufacturing?!
- Founder and current Chief Product Officer of MacroFab Inc
- The former founder of Dynamic Perception
- The former Co-Founder and Chief Architect of Alert Logic
- Was on the previous MacroFab Engineering Podcast episodes
- Topic today is the Coronavirus or COVID-19 outbreak in China and its impact on the global Electronic Manufacturing Supply Chain
- If you want to know more about the virus itself I suggest going to the CDC website
- ~80% of factories in general are back to work in China, but only about 21% are fully staffed
- PCB Vendors
- Extended holiday, workers at a lot of Chinese plants who went home weren’t allowed to come back for two weeks
- We have lots of production in Taiwan
- Taiwan blocked all entrance to mainland Chinese on the 5th of February, many limits still in place
- This is causing significant delays in engineering time for new PCB orders, as most of our vendors’ engineers went back to mainland China for the holiday, and haven’t been allowed to return
- PCBs going to Taiwan/Vietnam/Malaysia, etc.
- As soon as delays started happening, a lot of companies sent orders over to other Asian companies, of course, this caused a fast building backlog at those companies
- Prices going up in Taiwan, Vietnam, etc
- FR4 is now the real problem
- Even if production wanted to speed up in Taiwan, Vietnam, ect.. they can’t get the raw materials fast enough
- Mechanical / Custom Mfg Materials
- This is the biggest challenge for a lot of our customers
- Plastics and metals made in China are getting delayed by a month or more against the original lead times
- Factories are under-staffed and backed up with big orders
- Components
- Right now, most component suppliers are back up and running, even if under-staffed
- Small to mid-size orders won’t be impacted much, but high-volume orders sent direct to the manufacturers are getting longer lead times and higher prices
- Yageo is one of the vendors we’re hearing about, as of late last week pushing lead times out past a year on some bulk orders with price increases as high as 50%
- Vishay also has several plants closed as of Monday
Next Episode

MEP EP#214: It is Probably Safe
MEP EP#214: It is Probably Safe
Parker
- Just got back from vacation
- Have not worked on any projects since last episode
- Watched lots of old er James Bond movies
- Should we do a Spy gadget episode if we can get the right guest?
Stephen
- Simulation of the Week: Behringer Model D Oscillator Core
- Lots of cool stuff going on
- Exponential converter
- Constant current capacitor
- Discrete opamp with discrete comparator
- CNC Update
- Base built and topped with a torsion box
- 3⁄4” MDF construction
- Gantry is on but needs some love
- New Spindle has 80mm mount
- This does not fit on my current z axis
- Make a mounting bracket with leftover aluminum from previous project
- Base built and topped with a torsion box
- New transformer for rackmount guitar preamp
- Old configuration was to do a 115:12.6 transformer then feed that into a 12:230 to get back up to high voltage
- Simple math says 230/12 = 19.16 so, 12.6*19.16 = 241.41VRMS = 341.36VDC
- In reality I am getting 250V....
- Hopefully with the new transformer ratio I will get closer to 300V which would be a 20% increase
Rapid Fire Opinion
- Webinar Updates
- Wednesday at 2PM Central
- Link in the show notes to register
- Parker does runs a webinar on March 11th
- Sweat sensor finds stress quickly
- Future of smart watches?
- AutoDesk Eagle sales tactics
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