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

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.

Workparties or Scrums. We hold a weekly workparty, every Wednesday, from 12 to 5pm EST. See event https://calendar.google.com/event?action=TEMPLATE&tmeid=Nm9vM2NwaGo2cGk2NGJiMTY1aWpnYjlrY2dyMzRiOW82OG82NmJiMjY0cmo2cGhtYzVpajJwMWpjY18yMDIxMDcyOFQxNjAwMDBaIHBvNXVidDRkMzhjdm12dWFrOWEzamttZDQwQGc&tmsrc=po5ubt4d38cvmvuak9a3jkmd40%40group.calendar.google.com

Harvesting discussions and placing them into documents, formatting documents.

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.

Transporting self or something, traveling.

Time spend shopping for parts and materials online or in physical stores.

Video production, publication and improved aesthetics of documentation.

Put this project into a sustainable business perspective.

Prototyping, assembling prototype, follow design.

Low skills tasks.

Write documentation about the design, prototype, process, make the work stigmergic.

document here
https://docs.google.com/document/d/1oxwqA1NBgCzqHZENyWePKUltOa8nx7eaM2-pIi_B5sk/edit

Look for materials in local stores, get inspired, purchase.

Searching or buying materials

Work for Daniel K
Shopping for materials for the bracelet and parts.

Work for Alex
Shopping for materials for the bracelet.

Assemble the piezo actuator prototype V3

Taches de travail pour Jean Guy, pour monter l'imprimante avec Serge et Tibi.

This is a place for Kaven to log his time for:
R&D report: Documenting the ArtrOrica 3D printer.
https://docs.google.com/document/d/1aeeG9JbX90hP0RLv4s6SIB3twHQTg5JvzS3c_V1fmt4/edit#
Bill of materials: Edit a complete bill of materials
https://docs.google.com/spreadsheets/d/1F1GJ9L3XXN5_eNYiZy87bhjPXPMOPTXNtjbKn8IQeos/edit#gid=184706214
User manual: Assembly of kit, fine tuning and alignment
Document to be created!!
Manufacturing: Recipe
To be created with Tibi!!
Testing and quality control
Document to be created and associated with the R&D report!!!

Fabricate a xy stage driven by 2 stepper motors.
Proposition: use 2 stages from a CD rom.
Use Polulu stepper motor driver from 3D printer, ask Serge.

Preliminary experiments with the Micro 3D printer.

Preliminary experiments with the Micro 3D printer.

prototype the low cost tape sensor, will be taken by Matheus

prototype the low cost tape sensor, will be taken by Matheus

prototype the low cost tape sensor, will be taken by Matheus

prototype the low cost tape sensor, will be taken by Matheus

prototype the low cost tape sensor, will be taken by Matheus

Worked with Jonathan, figuring out how to use Frederic's electronics for the Mosquito SS4
NOTE: I need to log Frederic's electronics in the system!!

Executed the design, experimented and acquired some data
https://docs.google.com/document/d/1cf-x90TeYX1l47ActWZKTHopilXYElawSF_shf37sng/edit#heading=h.nexobfqcgdnr

Work on Photonics for the LED Mosquito in visible

Microfluidic Chip
Open main document
https://docs.google.com/document/d/1WBG1w-U90niLxVA-GlOR4WeIW7ef9x9nZD9nClXwl0E/edit

OCT 17-18, 2013
Firsts tests using 3D printing for microfluidic chip prototyping and fabrication.
Next time I need to continue the thermal annealing experiment, go beyond 150C.
We also need to test other designs with better sceals.

OCT 22, 2013
Thermal post-treatment of the polymer 3D printed part. Temp. set at 160C.
I also successfully transferred a micropattern from Spot-e to PCL

Work with Ivan to reinstall the Micro Gym at Phil's lab and to help him play with the gel samples. These manipulations require the formation of the gel in the mold created by Ivan, attachment of the gel tube to 2 needles and executing a training protocol, which consists in stretching the gel and compressing it with given time parameters for a number of times.

03, JUNE 2013
I discovered this new sensor by playing with the microfiber transducer.
Ideas were there before from discussions with Frederic about the constriction transducer. Frederic thought that the mechanism of the constriction transducer was leakage, and suggested to plunge it in water to see how the signal changes. The microfilament is a constricted optical fiber on a longer length, so the connection was easy to make, I plunged one microfiber transducer into water and it worked.
I also tested it to see a difference between water and alcohol, and it worked. I tested saturated salted water, and the signal difference with pure water was too small to make a conclusion.
I published the results in this video http://youtu.be/oA-0UgrdPBU
I believe that the working principle is leakage: the fiber is pulled to a smaller core, some light transferred into the cladding, which propagates if the fiber is in air. If the fiber is immersed in a fluid with higher refraction index some light escapes. We're measuring intensity fluctuations. So yes, it depends on the difference between the index of refraction of the cladding and the external media. Nothing out of the ordinary. There is some specific know how for the fabrication of the fiber, which has to be tapered and pulled with a certain geometry, the tip has to be melted to a ball and coated with silver (we're using our in-house low cost silver coating method) to send the light back to the detector.
I marked some time for documenting the work, communicating to SENSORICA and publishing it on social media.
I used 125/63.5 MM glass Infinicor300 Corning fiber, pulled with the microsplicer, voltage used 8.5V, max current. I pulled the fiber by hand using the manual micrometers on the device. One can diminish the voltage down to 8V. 7V is not enough to melt the glass fiber. At 8 one can do finer stretches.
The tip of the pulled micro fiber was melted to round it, and was coated using our inhouse wet silver coating method. Only the very tip was coated. I made 2 devices, 1 to 2 mm long, 40 and 20 microns diameter. Only the 20 microns diameter was sensitive when immersed into water.
I used the 850nm LED to test it, before it was improved with filter and amplifier.
TODO: try different diameters. It seems that the critical diameter is between 40 and 20 microns. Also try multiple constrictions to see if we can have a discrete level sensor.

June 17, 2013
See documentation in this doc
https://docs.google.com/document/d/180NuS2Rn6rIUfML0skvjQJAYBXNdBNxFsIZbZXa3HwU/edit#

The setup was made before, there is another labnote for it.
http://valnet.webfactional.com/accounting/labnotes/324/

June 17, 2013
Continued the work. See the Google doc for more details. Jonathan and Antonio were also involved.
We discovered that the analog out of the Labjack is limited to steps of 0.02Volts. We need 0.002Volts resolution, in order to test below 0.5um piezo steps. Jonathan will make a circuit for this.

July 18, 2013
Continued work on characterization. I am doing long acquisitions for precision tests. These results will be entered in the document in the Precision section.

August 01, 2013
Worked with Bing and Antonio on the Piezo. We have a problem with the assembly of the piezo controller. Jonathan made a new prototype and we tested it and it did not work. Frederic's prototype still works fine. We could not clearly understand why the second prototype did not work. The new boards for the product seam to be fine. So the problem is still a mystery.

August 05, 2013
Recreated the characterization setup, because Jonathan had taken the piezo driver prototype away for the fabrication. I modified the way the fiber is attached to the piezo stack.

August 06, 2913
Resumed characterization experiments. I worked on Precision. See more
https://docs.google.com/document/d/180NuS2Rn6rIUfML0skvjQJAYBXNdBNxFsIZbZXa3HwU/edit#
The long-term stability problem prevents us from directly measure precision. I put a note in the doc and sent message to the team about it.
"This [long-term stability of the Mosquito] is a problem with the acquisition system and with the Mosquito in general that we need to address! We need to improve the architecture of the Mosquito by integrating a reference, which is divided from the signal to account for intensity fluctuations."
I entered the best data here.
https://docs.google.com/spreadsheet/ccc?key=0AjrQyEif2HItdGJ4TEQxcHdOVzJvdmdHU3lrVUN4OFE#gid=0
One way around the stability is to measure the difference between 0 Volt and the x Volt, "x" representing an input voltage to the piezo controller, which will result in a motion step.
Data still needs to be processed.

Oct 23, 2013,
tested the 2 axis piezo system, driver and the actuator. Worked with Antonio and Jonathan. Produced the piezo manual
https://docs.google.com/document/d/18K3m9b_4ah3igcSYuZX4mkTkGPJBSjQVfBVbWE10GC0/edit#

These activies are repeated in order to clarify the procedures of the Low-cost Tape Sensor design. The citations include these steps as well.

_______________________________________________________________________________________________
Tape sensor - introduction (done)
https://docs.google.com/document/d/1zdmiAOmFeQItxXapPoQMGcESIo45ba9OjiSVuGQv_HU/edit

Tape sensor - gap optimization (IN PROGRESS)
https://docs.google.com/document/d/1GPqPvz-HNo_x3bsnzQJH-MdAUW6-Ng5_rn6X-iQHjrI/edit
https://docs.google.com/spreadsheet/ccc?key=0An3nky8B3vGvdDVaa1RNZEJfTXBRZks0aHEwMkVHUlE#gid=0

Tape and flex sensor - comparison (IN PROGRESS)
https://docs.google.com/document/d/1rVWFDnDA44ukW8spq3I6FK44CpHQsx6EkKqLtUMp-Qc/edit
https://docs.google.com/spreadsheet/ccc?key=0An3nky8B3vGvdHRlazJyd2MtV3I1bFFvWllBOG5KYkE#gid=1

Tape sensor - 3D printing (IN PROGRESS)
https://docs.google.com/document/d/16Xa8rrEBSp0ZAj7IaDn60Q6hmW70u6ZAx3Zh9eA_mvI/edit

_______________________________________________________________________________________________
Manufacturing:
Tape sensor - manufacturing (STANDBY)
https://docs.google.com/document/d/18acvPBS_TTARKdoVYLB4KJiAujJnDLQMEXDhCcvkSvE/edit

Pictures:
https://docs.google.com/drawings/d/1rmfqwBVCDX67FDc1AA79UqCfruJWfc0nDq1F0DaCJf8/edit
https://docs.google.com/file/d/0B33nky8B3vGvRmRtZHU1RzA5TW8/edit

_______________________________________________________________________________________________
Interesting sources:
http://www.roctest-group.com/sites/default/files/bibliography/pdf/c103.pdf
http://www.micronoptics.com/uploads/library/documents/Micron%20Optics%20Optical%20Sensing%20Guide.pdf
http://www.roctest-group.com/sites/default/files/bibliography/pdf/c147.pdf

ronan

Created a low cost optical tape sensor that can be put on different structures to detect bending.
We'll apply it first on a hockey stick.

See project page
http://www.sensorica.co/home/projects/smart-sports-equipment

Started on Friday 27, 2012 After we created the prototype and made the demo for Zhu (Canadian Space Agency, beam deflection sensor) we realized that this device works in stretching and compression. I had the idea to create a very simple and low cost tape sensor using 250 um diameter PMMA fiber and kapton tape. The goal of this experiment was to build the first such prototype and test it. See design https://docs.google.com/drawings/d/17Wb68vkZPeV5jz1GJDJG-TXER2Ofy-1wyndfQbkgp10/edit The device was built and successively tested. See the video made with Daniel http://youtu.be/yKvdryt1iKk

04 JUNE 2013
Worked on the setup to fabricate the low cost Tape transducer. I continued in the same direction from where I left it. The device is now almost done, need to take some pictures and document how it works. This is still a prototype device, to produce a few of them in a systematic matter and test them.
I will use the enhanced LED 850nm Mosquito to test it. I need to make a project presentation to SENSORICA about this, in a week.

05 JUNE 2013
Did some mechanical work on the fabrication device. I finally put in place the micrometer screw and 2 springs to move the working plate. It seems to be solid. After this, I shifted my attention to the Y connector for the 250um diameter PMMA fiber. I created a separate labnotes where I marked 7 hours of work on this. The main problem was to create a mold/stamp for PCL, from which I make the connector. The idea is to stamp the Y grove into PCL, place the fibers into the grooves and apply optical clear epoxy to hold the fibers aligned in place. I started with clay, and moved to etching aluminum.

10 JUNE 2013
Produced a new low-cost tape sensor using Francois' design.
LINK: https://docs.google.com/drawings/d/1asamNBz8tPu4kdlQFe8pgtxvuKKwmVPaYIMSHOoOCOU/edit

11 JUNE 2013
work on the tape sensor presentation

https://docs.google.com/presentation/d/1IFB-VK3hAoStZ993fd_Ql_uCAd8OFKy8U3e8dCwqMc4/edit#slide=id.geae65ee4_046

14 JUNE 2013
Created documentation for the low cost tape sensor, adding stuff on the website, and updating the document.
Gave training to Ronan on the Tape Sensor. I also created a labnote for him to collaborate on this project.

16 AUGUST 16, 2013
Worked with Rodrigo on a new tape sensor design. We are trying to implement the idea of optical gearing. See concepts here
https://lh4.googleusercontent.com/VLhJE8ggBraByZLK-WyucfEWbLdz5ScYHO-RZ8t_dNo=w362-h217-p-no
One design use a concave lens (perhaps made with PDMS, using rounded lass rod/fiber as mold). See idea here
https://lh3.googleusercontent.com/fAnLoT_j3kPJST15bq41oYahT-XAuZWAX2RcJCSAXbQ=w345-h207-p-no
The other one uses a scattering (+ absorbent) medium within the gap between two fibers, using index matching gel with micron-size particles (silica powder or carbon powder).
See the design for the second choice here.
https://lh5.googleusercontent.com/TKaGjSu5k_NSM3qCjCIF6-cbXahWO_Ea8N91XjANrnY=w124-h207-p-no
Rodrigo and I designed an experiment to compere intensity variation with gap between an air gap and a scattering (+absorbent) medium. We are going to create the setup and perform the comparison next week. The deliverable will be a white paper. See idea here.
https://lh3.googleusercontent.com/rOv894jxwoewGojdu-sDyKQbzR5qUljyr3EuqZUP6Ko=w345-h207-p-no

23 AUGUST 2013
Worked on the low cost tape sensor with Rodrigo, helped him with the optical setup for some exploratory testing of optical gears. We are using 1mm PMMA fiber for these tests. This is in continuation of the previous work.