OSE Dev Team Meeting Agenda

Tues April 16, 2019

2 PM CST USA time

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1. Agenda - Progress Reports
1. Marcin - Quiet Stepper Drivers, 12 printer production engineering, 3D printed stepper motor
2. Anthony - Mold Casting report
3. Abe - shelf for 3D printer
4. Eric - MSU library; extruder printed

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• 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

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D3D Linear CNC Torch Table Concept

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XY gantry

12-18” width

• Torch Table for linear stock, where cost for structure is reduced drastically
• Bar stock materials handling is easier than sheet material handling
• Z motion with springs + geardown
• 12-18” working width
• Decent as most parts do not need to be larger than 12” for many industrial parts, and there is an advantage of using the edge to reduce cutting requirements for linear objects
• Test bed for:
• Auto ignition
• fuel-saving gas turnoff on travel steps
• DIY 3-hose torches, which are otherwise expensive
• Planetary gear-downs
• Coolant pipe

Bar Steel up to 20’ long

Rollers

YYXZ

Gantry

Config

Stepper with

Planetary

Geardown

Springs on Rods

1” Universal Axis

Torch

Igniter

Quenching Water Bath

Water cooling spigot

Wiper

[[3D Printed Linear Bearing]]

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Stacked Planetary Gear Design

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• Start with a single one with shaft supported by bearings
• Then start the next stage in line
• Shaft increase from 5 mm
• to ½” at 3x geardown (14 in lb)
• To 1” at 9x geardownto 1” (40 in lb)
• To 1” shaft at 140 in lb

Stepper

Geardown

New

Shaft

Bearing

Bearing

Link

3D Printer Critical Path on Wiki

Notes

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1. Eric - MSU expo - hundreds of people came out to talk to Eric
1. Good interest in 3D printing
2. Potential D3D workshop in Michigan

Abe

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• Gitlab D3D Mini PVC Parts and Assembly
• Abe working doc
• building a corner shelf for a 3D printer.
• 3D printing containers for growing floating saplings?
• Next priorities
• Reassembly of frame with overhead axis’ with new parts and more accuracy.
• More D3D Mini PVC assembly testing in CAD
• Continue exploring python for freecad

Eric/Poli

Picked up sample 3D prints from University library ($10) and public library ($2)

Writing MSU Expo follow up email

D3D v19.02 Production Engineering

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• 12 printer 1-day production engineering
• Electronics Quality Control

Wire Box

Update Endstop

Modify Stepper Motor Bracket

Weldless Frame

No-hole carriage

Detail Prints

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• 12 printer 1-day production engineering
• Electronics Quality Control

Manufacturing Execution Systems

With Jon Takacs

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Small automated 3D Printer-based enterprise with 100% open source hardware and software toolchains.

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Simple push ejection video (what we will try first):

https://www.youtube.com/watch?v=lra0YW3hG6Q

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Concept peeler:

• Takacs microfactory project planning documents + project execution documents (Readonly)
• https://drive.google.com/drive/folders/1rcVzWSWN1S5JvrkUnPXfVhJ65behOP8T?usp=sharing
• 2019 design of projects tracks work to be done to realise factory.
• Execution references an index number in design of projects. I.E. MES is “M for manufacturing 16”
• Will work to get links to these on wiki

Takacs log

• Auto eject - feature one is simple G code that we could custom make per print (to start) https://www.youtube.com/watch?v=KxU3ElVlLPw
• If this works great, great. Then I make a python post slice script for cura that checks the model for an area where the print does not occupy to lower the head a few cm to then drive forward and push it off.
• If this less complex method fails, I have a design here for an attachment to the print bed. Basically there will be a large PVA (or whatever that fancy plastic is) sheet that is expanded to have timing belt attached at the sides. This will be moved by stepper forward off the sheet and will be exposed to a peel bar to detach any print or bib material. Also opens up possibility for continuous printing head variants.

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E-Commerce sites (I need a webstore to connect to my MES)

• Various sites: https://www.ecommerceceo.com/open-source-ecommerce/#opencart
• https://www.opencart.com/ Opencart is huge. Has some of the top sites using it.
• Open source and turn key. Just what we need.

Golf Cart

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3D Printer Production Engineering

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Wire Box

Update Endstop

Modify Stepper Motor Bracket

For getting wiring out of way of X endstop

Update Build Instructions

Verify Detail Print

May be done as Spiralize Contour. Holes are required. Can’t do in Spiralize contour mode.

Printing without Cleaning

Verify Self-Replication with 0.8 mm nozzle

Update CAD

Weldless Frame

No-hole carriage

Through wires didn’t work

Brackets that hold the corners. This assresses XY, but Z is in middle so it’s weakly supported. This should not matter, and we can benchmark against a welded frame.

Double Heater Block

3mm Rubber Extruder

OSES Collaboration Specification

• MES
• Opensourcewarehouse.org
• Osmicrofactory.org
• Opensourceecology.org
• Wiki
• Buy vs Buy Production
• Distributive Enterprise
• [[OSE Specifications]]

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Open Source Golf Cart design sprint Friday

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8’

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5’

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Standard Dimensions: 4’x8’

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OSE skid steering golfcart: 5’x6’

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

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Golf Cart Body

Power Cube

20x20x30”

Specs:

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

Notes

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Marcin:

• D3D v19.02
• William - open source simple extruder
• Clamp

https://wiki.opensourceecology.org/wiki/D3D_v19.02

Nathan - Seed Eco Home Model

Part Library

My New House

Notes

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• 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

OSE Clubs

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• 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

DC/DC Converter Module

● ~$35 for parts shown here

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

input by factor of ~3)

● 30A max current

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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

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Instructable on Buck Boost Converter

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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

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

Jen update and questions

Homeschool communications and progress report

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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 �