1 of 11

OSE Dev Team Meeting Agenda

Tues February 19, 2019

2 PM CST USA time

​

​

  1. Agenda - Progress Reports
    1. Marcin - OS Golf Cart
    2. Jon -
    3. Abe -
    4. Nathan - 3 modules done, added part library to wiki
    5. Jen

​

​

  • Meeting Maintainer/Jen
      • Embed meeting on Dev Team Log, including YT, notes, and edit link
      • Insert current Effort Graph-
      • Post notes and video on OSE Workshops FB page
      • Organize old meetings - hide older than 1 mont
      • Assign Roles and Introduce the meeting

​

2 of 11

Open Source Golf Cart - design sprint Friday

​

8’

​

5’

​

Standard Dimensions: 4’x8’

​

OSE skid steering golfcart: 5’x6’

​

JD Gator - 5’x8’10” (model comparison). Pictures.

​

Golf Cart Body

Power Cube

20x20x30”

Specs:

  • Max speed 20 mph for
  • 14 or 15 typical industry standard
  • Walking is 3 mph

3 of 11

4 of 11

Nathan - Seed Eco Home Model

Part Library

5 of 11

Abe

  • refining clamp design and assembly of D3D Mini PVC
    • Gitlab D3D Mini PVC Parts and Assembly
    • assymetrical clamp
    • Freecad and python
    • Takacs: I thought of friction clamps using screws onto the PVC, then maybe magnetic hardpoints just like or similar to the actual uAxis. So, you would have a screw on clamp, then a magnetic hardpoint to easily attach uaxis. Thanks for your work on this Abe! The clamps look awesome!
  • Next priorities
    • More D3D Mini PVC assembly testing in CAD
    • Continue exploring python for freecad
    • ​

6 of 11

Takacs log

  • NOT MUCH CHANGE
  • D3D OH wiring and initial prints commencing (moved to the warm indoors)
    • 2/26 - Stepper motor for extruder was non-functional. Bought a pack of higher quality steppers. What steppers has the team had luck with? Please provide a link.
  • Printer firmware configuration commencing.
    • Set the travel for xyz to reflect the full 12 inch travel. That’s a big print!
    • Looking into getting the LCD and other features running as well.
  • 4 other printers being refurbed so I can have a cluster
  • Designing a website to start selling printed products
    • Do we know of any open source webstore formats?
  • Work on a MES (manufacturing execution system) to track-
    • Factory inputs, outputs, and machine management.
    • Maybe get a GIT started for this / some wiki pages. 3D printer is first focus though. I think I have a MES page up somewhere on wiki
  • Work on conveyance for automated, online print factory.
    • Eventually wiki for this. Hoping to use Uaxis parts as part of convayance system. More with Less!

7 of 11

Notes

​

  • Nathan - 3D printable OBI house models
    • Nathan Log
    • Small magnets as connectors
    • Scale - is called ½” scale - ½” = 1’
  • Eric - https://sciencefestival.msu.edu/Event/View/1165
    • Going to build volcano heater nozzle
    • 70C for bed adhesion
  • Jen - homeschool programs to join project
    • Open source hackathon in North Seattle Community College
  • Abe
    • D3D Mini PVC
    • Model to determine if axes are clear
    • Bolt length and nut catchers
  • Marcin
    • Book - Solar Car
    • Golfcart open source. Motors.
    • Control Code

8 of 11

OSE Clubs

​

​

  • 1 Year Online Curriculum for High Schools, Home schools, Universities
    • Many participants
    • Used to recruit for OSE Clubs, Dev Team, Workshops
  • Can we achieve 10% conversion to OSE Clubs?
    • Market this actively to local high schools and beyond

9 of 11

DC/DC Converter Module

● ~$35 for parts shown here

● 5V - 60V input and output (can change

input by factor of ~3)

● 30A max current

​

Next steps:

● order parts and build prototype

● choose microcontroller and display

  • ARM Cortex M0 with 7-segment display could work, cost ~$15

● write code for sensing voltage and controlling potentiometer

​

Instructable on Buck Boost Converter

​

Can we drive MOSFET with Arduino directly?

- Maybe with P-channel FET, but they tend to be slower and have more resistance to current flow

Can we measure here directly with Arduino?

- yes but input resistance of Arduino would be in parallel

​

https://wiki.opensourceecology.org/wiki/Adjustable_Power_Supply_v18.08#Buck-Boost_Converter

10 of 11

Jen update and questions

Homeschool communications and progress report

​

Alternative economic and governance projects

  1. Cultu.re- not financial, blockchain based, free associations of individuals- I would like to invite Toni Lane to speak briefly at a meeting soon- It seems she’s done a lot of the self-governance legwork. WE have the hardware to build the civilization. Her project has the structure.
  2. Michael Tellinger’s Ubuntu project- Can mesh cashless with current governance systems
  3. https://wiki.opensourceecology.org/wiki/Alternative_Economy_Projects �

11 of 11

Eric/Poli

Reattached heated bed. Tweaking Z-height

Collecting materials to print for expo.

Going to use QR codes instead of handouts.