====== Minute - February ======

[[start:classes:principlesofdesign:allograftpreservation_2012:start|Back to allograft preservation page]]

===== 02/01/2012 =====

  * We had a group meeting after EID103 class session to discuss individual sketches and decide group's best idea sketches.
  * Found several strengths and weaknesses of our individual drawings.
  * So, we brainstormed ideas about our design and made certain improvements such as better slide-open rid that also lifts up allograft parts and fool-proof mechanism that doesn't let the rid open too quickly.
  * We worked on finishing group sketches and ended up drawing three more new sketches.

  * **Link : ** [[Initial Allograft Preservation 2012 Group Sketches|Initial Sketches]]

===== 02/03/2012 =====

  * We finalized our group sketches.

===== 02/08/2012 =====

  * Meeting with Prof. Lima.
  * We discussed about the problems and established objectives of next few weeks.
  * We set up a meeting with Daniel Gitzel for demonstration of 2011 allograft preservation pump system.

===== 02/10/2012 =====

  * Meeting with Daniel Gitzel
  * Daniel designed and programmed a pump system using a diaghragm pump (better for removing liquid), peristaltic pump, and arduino control system.
  * He gave us all documents from last year's project.
  * He showed us where all the necessary parts were stored.
  * He briefly explained how the system work.

  * However, the pump that he used is not available right now, therefore we will have to use different pump.
  * The control system needs to be modified for a new pump.

===== 02/13/2012 =====

  * General Meeting
  * Progress and objects were discussed - we need to re-build the pump system.
  * We made a first draft of problem statement.
  * We discussed about the time line (Tentative schedule)

===== 02/15/2012 =====

  * General Meeting
  * Progress and goals were discussed
  * We need to verify that impulse sealer works with the thick IV bag.
  * Find another peristaltic pump available
  * Find a large container to store a knee
  * Design a system that uses IV bag instead of sterile container.
  * Work on making an IV bag with input and output valves.

  * After few trials, we figured out a method to successfully sealing IV bag: ** Set impulse sealer dial at 8 and quickly press down firmly three times) **
  * We discussed how the tubing system will be.

  * **Link : ** [[Sealing IV bag with impulse sealer]]

===== 02/22/12 =====

  * Successfully operated the pump system comprised of a peristaltic pump, a diaphragm pump, and four chambers with manually caliberated pump rates.
  * We decided to use Tupperware for solid chamber.

  * **Link: ** [[First successful run of pump system|First successful run of the pump system]]


===== 02/23/2012 =====

  * We made a first design of IV bag with input and output valves.
  * We used an IV bag with 2 tubes.
  * Attached valves that enables us to control flow directly.

  * **Link : ** [[IV bag with input/output valve]]

===== 02/24/2012 =====

  * IV bag passed the No Leak Test.

  * We met with Daniel Gitzel for an advice on operating the arduino control system.
  * We worked on putting the pump system together.

===== 02/27/2012 =====

  * Met with Prof. Lima and talked about purchasing media bags and containers.
  * Discussed about which tubing size is ideal for the project.
  * We decided to finalize our BOM soon.