Process: Work Package 4 - Deliverables - design starting 2021-03-30 ending 2021-05-16

If you were logged in and working on this process, you would log your work on this page.

Outputs

Scheduled:

Unplanned Production:

Work

Planned Work: (Requirements are ordered by due date)

Work - R&D mechanics: 50.00 Time - Hours due March 30, 2021

Design, budget of 2,250$

DESIGN REQUIREMENTS
Easily replicable design with stock components and minimal use of custom parts (unless they can be digitally fabricated with a RepRap class 3-D printer or CNC mill –e.g. limit to what is found in most fab labs and avoid high energy processes and a skilled machinist). The designers should seek to minimize cost and complexity while keeping throughput high (continuous if possible).

WORK ETHIC REQUIREMENTS
# Work should be done transparently, allowing all project contributors to provide feedback and to contribute.
# Contributions without proper documentation according to requirements of CERN open source hardware license are invalid.
# Documentation should be created progressively, during every work session, not at the end of a task.
# This task cannot be monopolized by any contributor, it is open to participation.
# Milestones must be announced to project affiliates as they are reached.
# Number of man-hours and budget are fixed. If more time is spent than planned and money to be paid surpasses the allocated budget, contributors involved in this task split the allocated budget in proportion to everyone's contribution.
# Contributions that do not reflect good work, that are inflated, or that are not properly documented can be redflagged by any contributor in this project, which can lead to the invalidation of the contribution. Repetitively misrepresenting work in logged contributions can lead to expulsion from project.

Open Design doc.
https://docs.google.com/document/d/1g6DbV0mSqwU6rdLqyrv5Ctw_3cHamuPZLFXwajPkN4g/edit?usp=sharing

Unassigned
Work events:
July 6, 2022 1.50 Time - Hours Done by anthony

I implemented the pid control system and connected the electronics for braking, however the braking process appears to inject too much high frequency noise to allow the RPM to be reliably detected with good accuracy using this approach. Detecting current rather than voltage might work better, I ordered some sense resistors to try that approach. I can also use the ADC of the pico instead, and possibly use the extra core of the pico to improve timing issues. However it is starting to look like an external encoder is a better idea than trying to use back emf. Indeed perhaps I should give up on back emf now. The motor controller is able to detect the rpm and position of the motor using back emf, but they use a processor running C or assembly, c is about 100x faster than micropython, assembly faster still. It may not be viable in micropython. Took a video to show the operation of the braking electronics/proposed system and that it is viable.

July 4, 2022 3.75 Time - Hours Done by anthony

rigged the half h=bridge L298N modules to perform passive braking from the PWM of the Pico, and set aside for later, for use in combination with an rpm measuring system, this is large enough and powerful enough that we can use it for the main centrifuge hopefully. We can use the actual hardware I have prepared, not just the design, I will just keep it assembled until we need it.
rigged a test brushless motor to a fan, connected a phase to a rectifier bridge, divided the voltage down to protect the pico verified with the oscilloscope, trie dto measure the frequency with the pwm in peripheral on the pico. Noise is a major problem, tried a couple RC filter,s found one that seems to work, but for some reason the PWM counter is still giving the wrong frequency, I can confirm it on the oscilloscope. The next stage will be to try using the ADC and high frequency polling to try to track RPM. If that is not reliable, we must cook up some kind of encoder with the photointerrupter or buy an encoder, encoders are totally overpriced for some reason so we might as well just cook up our own in a minute.

July 4, 2022 2.66 Time - Hours Done by anthony

Made a pico program to control a fan with a pid loop, using the pwm peripheral to measure fan speed, as interrupts were not accurate enough. the fan speed measurement still isn't very accurate, something is wrong. It varies by more than 10% even when I measured the signal from the fan on my oscilloscope and that's not the problem, it is the pico. I can try using the pio peripheral next, and posting on forums. If it can't be solved we can't use the pico, and will have to try using an arduino or something instead, like the teensy.

July 2, 2022 2.25 Time - Hours Done by anthony

advanced the cad further earlier today, added the other motor and motor mount, decided on and implemented a strategy for the rotating seal and upper drive, modified and improved things, dealt with some errors and issues with fusion.

July 2, 2022 0.75 Time - Hours Done by anthony

Further investigated pico, got interrupts working, got the fan tach signal working, we could use interrupts, will investigate pio later.

July 2, 2022 2.00 Time - Hours Done by anthony

Investigated the use of the raspberry pi pico for use as a master controller of the centrifuge, controlling the peristaltic pump, acceleration, test run time, and rpm and relative rpm of the screw and barrel. Some technical difficulties, wrote a program to try to use interrupts to track the FG (frequency generator) output of some fans, the motor controllers for the spindle motors has a similar output to track rpm. It does not look viable. The next thing is to explore the use of the pio peripheral to monitor RPM.

July 1, 2022 2.30 Time - Hours Done by anthony

Added motor mount and motor coupler, solids collection geometry, adjusted width of tube etc., got everything in place, error free etc.

July 1, 2022 2.25 Time - Hours Done by anthony

Made some decisions on how to do things, advanced the cad, also did some research on how to do the firmware for a pico that controls both motors and a peristaltic pump

June 29, 2022 1.30 Time - Hours Done by anthony

Made some decisions, did some cad, shopping/sourcing parts, plans for the show at the maker festival

June 25, 2022 1.00 Time - Hours Done by anthony

shopping, considering options, some CAD, for centrifuge drive systems.

June 14, 2022 3.50 Time - Hours Done by anthony

Did more cad on the centrifuge, it is mostly done now I think, it could still be split for printing or whatever.

June 14, 2022 2.30 Time - Hours Done by anthony

Started work on the centrifuge. Make the screw and barrel and cap, sourced o-ring that fits and bearings. We still have to decide on a drive mechanism and I would prefer to do this before doing much more CAD as it has implications and changes can be hard to make.

June 8, 2022 1.20 Time - Hours Done by anthony

Did some planning and figuring with Tibi at the weekly meeting, made a plan for the CAD work to be done on the next version of the decanter centrifuge. Tibi will do the small scale test to ascertain the potential processing rate of the centrifuge. We also discussed the intriguing possibility to manufacture the parts with SLS in metal, as Wikifactory people tell us they can get a good deal on it.

April 14, 2022 1.50 Time - Hours Done by anthony

Discussed and made some conclusions on the design of the decanter centrifuge, considered self balancing mechanisms, what the barriers are and how to solve them. Decided on a plan of action: build a regular "mushroom hat" centrifuge to test the settling rate characteristics of the protein coagulate first, then if the results are promising, probably do a revision 2.0 of the main decanter centrifuge, to employ 2 metal shafts, eliminate the big bearing, keep the bearings away from the fluid, and employ direct drive (possibly, maybe not, there are issues with torque vs. speed curve matching that may require us to use pulleys. We may replace the pulleys with non-toothed pulleys or larger pulleys for better wear resistance.)

April 13, 2022 1.00 Time - Hours Done by anthony

research on options for rotating seals for centrifuge, considering options for moving the physical prototyping forwards

Feb. 2, 2022 11.00 Time - Hours Done by anthony

Travelled to Montreal to deliver parts, finish parts, assemble and test centrifuge, and document it all, at the Sensorica Lab. Mission accomplished, mostly. Many changes are needed, and the manufacturing limitations are serious. also see $50 for gas and 2 hours travel time, logged elsewhere.

Dec. 30, 2021 1.00 Time - Hours Done by anthony

improve cad file with modifications to the screw, schedule progress for milestone 1, expand bom.

Dec. 27, 2021 1.00 Time - Hours Done by anthony

printing, post processing. removing support from the internal rotor is a real problem. soluble support material and dual extruders is valuable, clearly.

Dec. 26, 2021 1.00 Time - Hours Done by anthony

Improving CAD, printing.

Dec. 24, 2021 1.50 Time - Hours Done by anthony

Inspect cad model, make final improvements, export and start the prints. filament cost will be logged elsewhere.

Dec. 17, 2021 1.00 Time - Hours Done by anthony

Replaced the bearing with a bigger one, shopped for the bearing, adjusted the model to accommodate everything, double checked everything to be sure it is all ready for printing. Still need to add holes to mount that uppermost bearing plate.

Dec. 15, 2021 3.00 Time - Hours Done by anthony

improve cad model, make some design changes, shop for parts.

Dec. 10, 2021 2.00 Time - Hours Done by anthony

I did some more on the fusion cad file for the centrifuge, design and drawing.The motors still need a few more dimensions. Redrew the motors, and added and adjusted everything for the mounts that come with the motors, decided on strategy to mount the motors after considering several options, they need to be changed so the fan does not stick into the bucket.

Oct. 30, 2021 3.00 Time - Hours Done by anthony

designed and added added motor mounts, teeth to pulleys,modelled motors and checked over the cad file

Oct. 13, 2021 1.00 Time - Hours Done by anthony

Tibi and I determined some of the details for changes/updates to the CAD model for the centrifuge, which I will make later.

Oct. 13, 2021 2.50 Time - Hours Done by Tibi

Accumulated over a few days, thinking with and work providing to Anthony, who produced the CAD files.
Drove the documentation of this prototype
https://docs.google.com/document/d/1Eq32CS5Lr5qy8SvmcNOLg8heyqcrqfEfMRUhx3XsUl4/edit

Oct. 13, 2021 1.00 Time - Hours Done by anthony

implemented the planned changes:
improve seal around cap and outer rotor, I added a groove for the oring to stick to, but realized a better idea is to increase the number of bolts. It is quite a lot of bolts, but will reduce the chance of leakage issues/the need to reprint a different one. There is no ridge in the cap itsself as it appeared it would be unhelpful anyway.
-thicken cap
-check over it all for errors
-put the hole back in the inner rotor
-thicken the shaft walls. There is a limit to this. I thickened both shafts, and reduced the central hole diameter.

- I was not able to make any progress with the pulley/shaft interface. There just isn't really enough plastic there to do much and still have enough strength. I could put some very thin threads on perhaps that would be ok, yeah.

Aug. 2, 2021 7.00 Time - Hours Done by PraxecoAffiliate

Modified Extruder Pro from Precious Plastic to match the needs for Green for Good. Design modifications were done to the extrusion screw to match the required processes. A bit of work is needed to finalize the leaves crushing section. The design modifications were made to the shared OnShape model.

https://cad.onshape.com/documents/e5ffe24c901e0463cea1c3a5/w/894b77f33ef5631b42db8302/e/c285d73b693d1bab88f0a39a

March 18, 2021 0.10 Time - Hours Done by Tibi

Set up the working, design and prototyping documents.

Work - Information mining: 3.00 Time - Hours due March 30, 2021

Conducted literature review about generic extruders in the food industry, their operation, and main components of industrial extrusion plants.
Mapping existing organizations (on Diigo) that have relevant activities such as supplying machines or industrial production.
Acquired a 2020 book that details the processes of extrusion processing as well as the mechanical and electrical design considerations involved.

Taken by PraxecoAffiliate
Work events:
May 18, 2021 1.00 Time - Hours Done by Tibi

Cleaned up Deliverables doc. Extracted some content and put it into presentations. Better flow, easier to read.
https://docs.google.com/document/d/1g6DbV0mSqwU6rdLqyrv5Ctw_3cHamuPZLFXwajPkN4g/edit#

May 11, 2021 4.00 Time - Hours Done by AlexisAlonso

Worked on Design Considerations, documented some ideas in the table, told that to Tibi.

May 6, 2021 0.75 Time - Hours Done by Unai

Visited a local corn miller in Njombe and added info and pics to general considerations: https://docs.google.com/document/d/1g6DbV0mSqwU6rdLqyrv5Ctw_3cHamuPZLFXwajPkN4g/edit#

May 5, 2021 1.00 Time - Hours Done by Tibi

Searched and documented different techniques to manufacture screws for extruders.

May 4, 2021 1.00 Time - Hours Done by Unai

Spent time with Tibi discussing General Design Considerations, talking notes in the cod / table.
Introduced the village corn mill model.

May 4, 2021 1.00 Time - Hours Done by Tibi

Spent time with Unai discussing General Design Considerations, talking notes in the cod / table.

May 4, 2021 0.50 Time - Hours Done by Tibi

Discussed a visual of the design architecture of an extruder with Bernard. He had already made a first draft, we discussed fine-tuning it.

May 4, 2021 0.50 Time - Hours Done by PraxecoAffiliate

Discussed a visual of the design architecture of an extruder with Tibi. I had already made a first draft, we discussed fine-tuning it.

April 28, 2021 3.00 Time - Hours Done by PraxecoAffiliate
April 19, 2021 2.00 Time - Hours Done by Tibi

Finished the Build Understanding presentation and presented at the Build Understanding meeting.

April 18, 2021 1.00 Time - Hours Done by Mayssam

Helped Tibi with the Building Understanding presentation: feedback and formatting.
https://docs.google.com/presentation/d/1WpRGuaFrFYwCeyw-kRZSqxvARfo0OIhqLxjk1Ov_vO0/edit#slide=id.p

April 18, 2021 4.00 Time - Hours Done by Tibi

Worked on the Building Understanding presentation. Mayssam helped a bit
https://docs.google.com/presentation/d/1WpRGuaFrFYwCeyw-kRZSqxvARfo0OIhqLxjk1Ov_vO0/edit#slide=id.p

April 18, 2021 4.00 Time - Hours Done by AlexisAlonso

Worked on the Building Understanding presentation. My point of view
https://docs.google.com/presentation/d/1WpRGuaFrFYwCeyw-kRZSqxvARfo0OIhqLxjk1Ov_vO0/edit#slide=id.p

April 16, 2021 4.00 Time - Hours Done by Bruce

Searched info about protein processing and surveyed companies that are engaged in this field.

April 10, 2021 3.00 Time - Hours Done by Tibi

Processed Bruce's mined info from his doc, into the Deliverables work, structured information.

April 10, 2021 5.00 Time - Hours Done by Bruce

Information mining, delineating conceptual space, pile data in this doc.
https://docs.google.com/document/d/1qt48RPToG9qfQssWqH4qMcs3rPJkMqC2ZlP_K8l3ts0/edit#

April 8, 2021 0.25 Time - Hours Done by Unai

Added a few organisations and documents to Diigo
Met a local artisan in Njombe (Tanzania) who can provide design considerations.

April 4, 2021 1.00 Time - Hours Done by AlexisAlonso

Explored concepts for shredding and squeezing leaves. Captured some examples of devices that instantiate these concepts in the Deliverables doc. Shared ideas with Tibi.

Work - Meeting: 10.00 Time - Hours due May 16, 2021
Unassigned
Work events:
June 29, 2022 2.00 Time - Hours Done by anthony

Had a meeting with Tibi to order parts and plan for the prototyping of the second version of the decanter centrifuge.
Made a BOM on the doc
https://docs.google.com/document/d/1Eq32CS5Lr5qy8SvmcNOLg8heyqcrqfEfMRUhx3XsUl4/edit#

June 29, 2022 2.00 Time - Hours Done by Tibi

Had a meeting with Anthony to order parts and plan for the prototyping of the second version of the decanter centrifuge.
Made a BOM on the doc
https://docs.google.com/document/d/1Eq32CS5Lr5qy8SvmcNOLg8heyqcrqfEfMRUhx3XsUl4/edit#

June 8, 2022 1.00 Time - Hours Done by Tibi

Meeting with Anthony to discuss second iteration of the Decanter centrifuge prototype. We used the report doc from the first tests.
https://www.amazon.ca/Adjustable-polishing-machine-fishing-12V3000/dp/B0965QSSBL/ref=sr_1_7?crid=2AY7OZ1LS49JJ&keywords=hollow+shaft+motor&qid=1654717312&sprefix=hollow+shaft+motor%2Caps%2C197&sr=8-7

We decided to iteratively go for a second design, redesign the screw, look at possibilities to only use one motor instead of two, better sealing for the barrel, and integrate other improvements ideas in the same doc.

June 9, 2021 1.50 Time - Hours Done by mariok

Worked on the design roadmap with Tibi and Elie.
Glanced over some engineering papers about oil extractors.

June 9, 2021 1.50 Time - Hours Done by ElieElHaddad

Worked on the design roadmap with Tibi and Mario.
Glanced over some engineering papers about oil extractors.

June 1, 2021 1.00 Time - Hours Done by mariok

Searching basic design parameters and discussing design with Elie, Tibi and Bernard

June 1, 2021 1.00 Time - Hours Done by PraxecoAffiliate

Bernard: Searching basic design parameters and discussing design with Elie, Tibi and Mario

June 1, 2021 1.00 Time - Hours Done by ElieElHaddad

Searching basic design parameters and discussing design with Tibi, Bernard and Mario

June 1, 2021 1.00 Time - Hours Done by Tibi

Searching basic design parameters and discussing design with Elie, Bernard and Mario

May 25, 2021 1.00 Time - Hours Done by ElieElHaddad

Scrum meeting with Tibi, Mayssam and others.

May 25, 2021 1.00 Time - Hours Done by PraxecoAffiliate

Design coordination meeting with Maysam, Mario, Tibi, and Elie.
We went over priorities, examples of designs.

May 25, 2021 1.00 Time - Hours Done by mariok

Scrum meeting with Tibi, Mayssam and others.

May 21, 2021 1.00 Time - Hours Done by ElieElHaddad

Design coordination meeting with Tibi, Mario, Bernard.
We went over priorities, examples of designs.

May 21, 2021 1.00 Time - Hours Done by Tibi

Design coordination meeting with Maysam, Mario, Bernard, and Elie.
We went over priorities, examples of designs.

May 21, 2021 1.00 Time - Hours Done by Mayssam

Design coordination meeting with Tibi, Mario, Bernard, and Elie.
We went over priorities, examples of designs.

May 21, 2021 1.00 Time - Hours Done by mariok

Design coordination meeting with Tibi, Bernard, and Elie.
We went over priorities, examples of designs.

Work - Documenting: 5.00 Time - Hours due May 16, 2021

Harvesting discussions and placing them into documents, formatting documents.

Unassigned
Work events:
Feb. 22, 2022 6.00 Time - Hours Done by Tibi

Writing Decanter Centrifuge testing report.

Jan. 22, 2022 1.00 Time - Hours Done by Tibi

Updated the Deliverables doc, mostly the Design section.
https://docs.google.com/document/d/1g6DbV0mSqwU6rdLqyrv5Ctw_3cHamuPZLFXwajPkN4g/edit#

Oct. 20, 2021 2.00 Time - Hours Done by Tibi
Work - Technician experimental: 60.00 Time - Hours due May 16, 2021

Logging low-skill technical work.

Example:
Suppose you 3D print something that takes 10 hours, but only requires one hour of setting up the printer, checking the print job from time to time, make on the fly adjustments and post-processing the part. You only log one hour.
The ware and tear of your 3D printer is logged in the Usable Inputs section. Your printer must be part of the Sensorica's pool of shareables, which means that it needs to be part of the inventory. Ask Tibi to add your printer.

Unassigned
Work events:
Jan. 19, 2022 1.00 Time - Hours Done by anthony

double checking things, finalizing, decided to reprint the barrel because the screw holes were a bit too big on the last one (the accuracy improvements caused the holes that previously grabbed the screw adequately to be bang on 2.9mm in diameter, which is not quite right for the screw to grab. The screw really has to grab, though. For the next revision these holes should be replaced with metal nuts.)

Jan. 12, 2022 0.50 Time - Hours Done by anthony

finishing screw, post processing to remove supports, sand, test for fit, all looks good.

Jan. 10, 2022 0.50 Time - Hours Done by anthony

reprint screw with better settings in sideways orientation

Jan. 9, 2022 0.50 Time - Hours Done by anthony

print screw in sideways orientation, remove support material, test for fit.

Jan. 9, 2022 0.50 Time - Hours Done by anthony

checking parts fit, dimensions are within suitable range, saving settings for future use, assemble bearings and other parts as far as I can to verify they fit

Jan. 8, 2022 1.00 Time - Hours Done by anthony

Re printing parts and adjusting parameters and options to achieve better accuracy. Circles appear to be much more susceptible to thermal contraction. Currently scaling objects up by 100.4 xy and using horizontal expansion of -0.1 combined with 4 wall layers and 80 mm/s print speed, 0.28 mm layer height, 70 degree build plate, skirt, most other parameters default is giving the best result. Some room for minor improvement, but probably no need to further improve. Thermal contraction appears to vary between brands of filament, but more so for circles vs. rectangular features. This variation between feature shapes is slightly baffling and a real problem. I am using PLA. Using "outer wall first" led to unnaceptable defects on the pulley teeth, however may be an acceptble subtitute for the horizontal expansion compensation factor on most parts. It leads to some under extrusion and some over extrusion on some areas of parts, it is unclear why.

Jan. 4, 2022 1.00 Time - Hours Done by anthony

review what has been printed, what needs to be done, add a table to the main doc, proceed with producing any remaining parts.

Jan. 4, 2022 1.00 Time - Hours Done by anthony

printing parts, updating master document

Work - Transportation: 20.00 Time - Hours due May 16, 2021

Transporting self or something, traveling.

Unassigned
Work events:
Feb. 5, 2022 2.00 Time - Hours Done by anthony

2 hours travel time to Montreal and back again to Cornwall. This is billed at an efficiency of 66 percent, because I also wanted to go to montreal for personal reasons.

Unplanned Work:

Work event: Work - R&D mechanics 4.00 Time - Hours Sept. 29, 2021 Done by anthony

Design and CAD drawing of the mini centrifuge, in fusion, link to the most recent version:https://a360.co/39RL6pV you can download the file from there and extract stls for printing if you wish.

Consumable Inputs

Part Mechanical Timing Belt: 2.00 Each due March 30, 2021
Onhand: TIMING BELT GT2 2MM ~ 1.00 Each ~ Location: Sensorica Main Lab ~ Technician: Tibi ~ Technician: anthony
Consumed: 2.00 Each Dec. 29, 2021 by Greens for Good
Consumable - FDM 3D printing filament: 500.00 Weight - g due March 30, 2021
Onhand: PETG 1.75mm ~ 5593.00 Weight - g ~ Location: Sensorica Main Lab ~ Manager: anthony ~ Manager: Tibi
Consumed: 407.00 Weight - g Dec. 28, 2021 by Greens for Good
Onhand: PLA-PHA ~ 1700.00 Weight - g ~ Location: Sensorica Main Lab ~ Technician: Tibi ~ Technician: anthony
Onhand: PLA-PHA BambooFill 1.75mm ~ 1000.00 Weight - g ~ Location: Sensorica Main Lab ~ Owner: Enrique ~ Technician: Daniel ~ Trainer: Daniel ~ Custodian: ACES-CAKE Canada

Usable Inputs

Part Mechanical - Electric Motor: 2.00 Each due March 30, 2021
Onhand: 400W CNC air cooled broshless motor ERB 12000RPM 2.00 Each
Used: 400W CNC air cooled broshless motor ERB 12000RPM 2.00 Each Dec. 29, 2021 by Greens for Good
Equipment - Electronic - Power supply: 2.00 Each due March 30, 2021
Onhand: Hantek power supply USB 1.00 Each
Onhand: Power supply GQ 1.00 Each
Onhand: POWER SUPPLY WALL 24V 1A 3.00 Each
Onhand: Supply Stepper Motor Drive Supply 2.00 Each
Used: Supply Stepper Motor Drive Supply 2.00 Time - Hours Dec. 29, 2021 by Greens for Good
Space Lab: 1.00 Time - Hours due March 30, 2021
Onhand: Space - Frederic D's lab 200.00 Area - square meters
Onhand: Space - Makxim's lab 100.00 Area - square meters
Onhand: Space - Phil's lab 25.00 Area - square meters
Onhand: Space - SENSORICA Montreal lab 250.00 Area - square meters
Used: Space - SENSORICA Montreal lab 20.00 Time - Hours Dec. 30, 2021 by Greens for Good
Onhand: Space - SENSORICA Robotics lab 1000.00 Area - square meters
Equipment - Mechanical - 3D printer: 1.00 Time - Hours due March 30, 2021

3D print the decanter Centrifuge and other parts required for the venture.

Onhand: 3D printer - Phil's 1.00 Each
Onhand: B9Creator 1.00 Each
Onhand: Ethienne's Wilson TS 1.00 Each
Onhand: ORD Solutions FDM Printer 1.00 Each
Used: ORD Solutions FDM Printer 12.00 Time - Hours Dec. 30, 2021 by Greens for Good

Process context:

Pattern: Generic R&D
Context: Greens for Good
Order: Work order 318 due: 2021-05-16

Previous processes:

Renovations work and Lab (space) starting 2016-03-01 ending 2016-03-01

Next processes:


Process notes:

Building understanding
Design
Total budget of 2,950$

documentation happens here
https://docs.google.com/document/d/1g6DbV0mSqwU6rdLqyrv5Ctw_3cHamuPZLFXwajPkN4g/edit#