OSE Dev Team Meeting Agenda

Tue Sep 11, 2018

12:30 PM CST USA time

​

​

1. Agenda - Progress Reports
1. Marcin - update on immersion
2. Miles - small power supply. Jesse is collaborating.
3. Jen- Note taker -
4. Meeting Maintainer
1. Embed meeting on Dev Team Log, including YT, notes, and edit link
2. Insert current Effort Graph-
3. Post notes and video on OSE Workshops FB page
4. Organize old meetings - hide older than 1 mont
5. Assign Roles and Introduce the meeting

Notes

• Printer build : 10 of 18 completed, supply chain issues and faulty/inconsistent parts hindered progress
• Full documentation and instructions are key for group builds
• OSE Boot Camp underway, 3D printer documentation is being completed and published
• OSE workshops Facebook page for more details on 3D printer
• https://www.facebook.com/groups/398759490316633/permalink/919285088264068/
• Power supply module video instructional

Power Supply Simulation Example

​

• Probe placement at 2 min
• Simulation at 2m 50s
• Diagrams at 3m 30s

Takacslog -

D3D Ohio 8/20

​

• Assembly of D3D hotend Finished - testing it
• Extruder build photos https://photos.app.goo.gl/P3TpbyrDfRtszzoX6
• Starting 1” PVC pipes cuting and drilling.
• PVC is still “bendy” from being in the heat. We will see printing results.
• Let’s Discuss magnetic mounting to plastic pipes though a 3D printer adaptor.
• Let’s Discuss MES (Manufacturing Execution Systems) continuous printing and quality management
• Marcin D3D BOM https://docs.google.com/presentation/d/1l05C_XZbEyRR8SyY3q4D-qVYQQJwL4bn0x73lgD4FLY/edit#slide=id.g1861bf60d5_0_6

• See the Photos Folder for Build Sequence
• See D3D Extruder details for screw BOM and vBOM
• Prusa build instructions https://manual.prusa3d.com/Guide/5.+Extruder+Assembly/114?lang=en#s2067

D3D_Ohio extruder build (V1807)

​

https://wiki.opensourceecology.org/wiki/D3D_Extruder_v1807

Power Cube - Abe Log

http://opensourceecology.org/wiki/File:PC17.11_auxiliary.fcstd

http://opensourceecology.org/wiki/Power_Cube_v17.11

• Made changes to PCv17.11 added to PCv18.01 including engine dimension corrections requiring the larger frame.
• ​

• Power Cube on CAD on Github - test updates with feature branching
• ​
• Can hoses be plumbed via curved wires in Draft WB?
• More FreeCAD tutorials
• Vokoscreen bugs?

​

Arduino Power Supply

​

• Fuse: FUSE GLASS 1A 250VAC
• Cac: CAP FILM 10UF 5% 400VDC
• Cac discharge resistor: RES 1M OHM 1/4W
• Bridge rectifier: RECT BRIDGE 2A 40V
• Filter capacitor: CAP ALUM 680UF 10% 10V
• Output zener: DIODE ZENER 9.1V 5W
• Voltage reference: IC VREF SHUNT 4.096V TO92-3
• Voltage reference resistor: RES 5.6K OHM 5W 5%
• Total cost of components ~$10 + shipping

​

• Reducing voltage with capacitor works but acts more like�a current source (DC circuit must draw constant current�otherwise voltage will change)
• Using a small transformer costs ~$3 more but offers�efficiency over a wider range of currents�and provides isolation

​

Zener keeps voltage below a certain threshold

Capacitor gets you from 120 v to 10V AC

Resistor discharges the capacitor upon turnoff

Filtering

KiCAD

​

v

​

current

​

Reference voltage

​

QUCS-s for Spice (or NGspice) Circuit Sim

​