Skip to content
Snippets Groups Projects
Commit 907582f9 authored by Mitalee Parikh's avatar Mitalee Parikh
Browse files

3dps

parent 1c982a66
No related branches found
No related tags found
No related merge requests found
Pipeline #217606 passed
Stage: test
    Stage: deploy
      Hide whitespace changes
      Inline Side-by-side
      Showing
      with 215 additions and 0 deletions
      docs/3dps.html 0 → 100644
      + 215
      − 0
      View file @ 907582f9
      <!DOCTYPE html>
      <html>
      <head>
      <title>em.def blog</title>
      <meta charset="utf-8"/>
      <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
      <link href='https://fonts.googleapis.com/css?family=Helvetica:300,400,700' rel='stylesheet' type='text/css'>
      <link rel="stylesheet" type="text/css" href="../main.css">
      </head>
      <body>
      <header class="container-fluid">
      <div class="row">
      <h1 class="col-sm-4" style="color:#202020">e<a href="../index.html">m.def</a></h1>
      <nav class="col-sm-12 text-right">
      <a href="https://gitlab.com/mitaleeparikh/mitalee.parikh"><img class="img-fit" src="../meta/icons/009-photos.png" height="20" width="20"></a>
      &ensp;
      <a href="mailto:emaitee@gmail.com"><img class="img-fit" src="../meta/icons/005-diamond.png" height="20" width="20"></a>
      </nav>
      </div>
      </header>
      <section class="row">
      <section class="col-md-3">
      <nav id="leftnav">
      <a href="../fabacademy/pppm.html">Principles, Practices and Project Management</a><br>
      <a href="../fabacademy/cad.html">Computer-aided Design</a><br>
      <a href="../fabacademy/ccc.html">Computer-controlled Cutting</a><br>
      <a href="../fabacademy/ep.html">Electronics Production</a><br>
      <a href="../fabacademy/3dps.html">3D printing and scanning</a><br>
      <a href="../fabacademy/ed.html">Electronics Design</a><br>
      <a href="../fabacademy/ccm.html">Computer-controlled Machining</a><br>
      <a href="../fabacademy/mc.html">Molding and Casting</a><br>
      <a href="../fabacademy/wc.html">Wild Card Week</a><br>
      <a href="../fabacademy/iipi.html">Invention, Intellectual Property and Income</a><br>
      <a href="../fabacademy/input.html">Inputs</a><br>
      <a href="../fabacademy/output.html">Outputs</a><br>
      <a href="../fabacademy/mdef.fp.html">MDEF Final Project</a><br>
      </nav>
      </section>
      <section class="col-md-6">
      <h1>3D Scanning and printing</h1>
      <p>This week I made some 3d printed tools and 3d scanned using photogrammetry.</p>
      <p>I wanted to make simple tools this weeks, so I experimented with simple joint mechanisms.
      Some references that I used to develop my designs: </p>
      <ul>
      <li><a href="https://www.compliantmechanisms.byu.edu/maker-resources">compliant Mechanisms Research (CMR by BYU)</a> </li>
      <li><a href="https://www.youtube.com/watch?v=97t7Xj_iBv0">Why machines that bend are better</a> </li>
      <li><a href="https://www.myminifactory.com/users/MakeAnything/collection/compliant-mechanisms">Compliant mechanisms by Devin Montes</a> - <a href="https://www.youtube.com/watch?v=PgDJlLqeTdo">video</a> </li>
      <li><a href="https://www.myminifactory.com/object/3d-print-96658">These transformed chopsticks</a></li>
      </ul>
      <h2>Design</h2>
      <p>I first made a scaled-up version of a simple Gemclip and some other simple geometry clips. I bent one end to add a dimension, that does not allow it to be made using only one subtractive method.</p>
      <img src="../fabacademy/images/week5/simpleclips.jpg" class="img-fit"><br>
      <p>I first made it in 2D in plan to the size and proportion I wanted, and then extruded it in Z. Later I bent the inner part so that the model could no tbe made only subtractively easily, as now it had an undercut.</p>
      <img src="../fabacademy/images/week5/side.jpg" class="img-fit"><br>
      <p>Then I used some parts of these tranformed chopsticks reference above that I found</p>
      <img src="../fabacademy/images/week5/transformedchopsticks.jpg" class="img-fit"><br>
      <p>And then made normal tweezers and then modified the geomtry to make it compliant like the chopsticks above.</p>
      <img src="../fabacademy/images/week5/designing.jpg" class="img-fit"><br>
      <h2>The models</h2>
      <div class="sketchfab-embed-wrapper">
      <iframe title="A 3D model" width="640" height="480" src="https://sketchfab.com/models/acabba4a8e95408484dcc6343d08ade7/embed?autospin=0.2" frameborder="0" allow="autoplay; fullscreen; vr" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
      <p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;">
      <a href="https://sketchfab.com/3d-models/gemclip-acabba4a8e95408484dcc6343d08ade7?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Gemclip</a>
      by <a href="https://sketchfab.com/emaitee?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">emaitee</a>
      on <a href="https://sketchfab.com?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Sketchfab</a>
      </p>
      </div>
      <p>Next after, watching some videos on making compliant mechanisms, I made a simple pick-and-place plier to test out the bending.</p>
      <div class="sketchfab-embed-wrapper">
      <iframe title="A 3D model" width="640" height="480" src="https://sketchfab.com/models/850342b563e44e1eb9413b347701a423/embed?autospin=0.2&amp;camera=0" frameborder="0" allow="autoplay; fullscreen; vr" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
      <p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;">
      <a href="https://sketchfab.com/3d-models/compliant-mechanism-pliers-850342b563e44e1eb9413b347701a423?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Compliant mechanism, pliers</a>
      by <a href="https://sketchfab.com/emaitee?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">emaitee</a>
      on <a href="https://sketchfab.com?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Sketchfab</a>
      </p>
      </div>
      <p>Some tweezers we used for holding down electronic components:</p>
      <div class="sketchfab-embed-wrapper">
      <iframe title="A 3D model" width="640" height="480" src="https://sketchfab.com/models/85e7031fa9fa444eabe54ac6152ed525/embed?autospin=0.2&amp;camera=0" frameborder="0" allow="autoplay; fullscreen; vr" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
      <p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;">
      <a href="https://sketchfab.com/3d-models/simple-tweezers-85e7031fa9fa444eabe54ac6152ed525?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Simple tweezers</a>
      by <a href="https://sketchfab.com/emaitee?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">emaitee</a>
      on <a href="https://sketchfab.com?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Sketchfab</a>
      </p>
      </div>
      <p>I wondered if it was easier to use the tweezers with a reversed action, where applying force releases the object. And by default it holds the object.
      For this, I used this <a href="https://www.myminifactory.com/users/MakeAnything/collection/compliant-mechanisms">mechanism designed by Devin Montes</a> - <a href="https://www.youtube.com/watch?v=PgDJlLqeTdo">video</a> and transformed it for the tweezers.</p>
      <div class="sketchfab-embed-wrapper">
      <iframe title="A 3D model" width="640" height="480" src="https://sketchfab.com/models/43feaabeb46647b8a4778c10bea22740/embed?autospin=0.2&amp;camera=0" frameborder="0" allow="autoplay; fullscreen; vr" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
      <p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;">
      <a href="https://sketchfab.com/3d-models/compliant-tweezers-43feaabeb46647b8a4778c10bea22740?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Compliant tweezers</a>
      by <a href="https://sketchfab.com/emaitee?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">emaitee</a>
      on <a href="https://sketchfab.com?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Sketchfab</a>
      </p>
      </div>
      <h2>Creating toolpaths</h2>
      <p>I used Cura to make toolpaths for my 3d prints. I uploaded my stl files, set my machine, choose PLA as my material and used these settings:</p>
      <p><img class="img-fit" src="../fabacademy/images/week5/cura.jpg"></p>
      <h2>Printing</h2>
      <p>I used an <a href="https://www.anycubic.com/products/anycubic-kossel-3d-printer">Anycubic Kossel Plus 3D printer</a> to print with a black 1.75mm PLA filament.</p>
      <p><img class="img-fit" src="../fabacademy/images/week5/anycubic.jpg"></p>
      <p>Printing the gemclip:
      The finish was alright, as the first layer spread a little too much, causing it to be broader then the actual form. The first layer has a layer height of 0.3mm, and all the consecutive ones were 0.15mm.
      I used a cutting blade to finish these edges.</p>
      <p><img class="img-fit" src="../fabacademy/images/week5/gem3d.jpg"><br><br>
      <img class="img-fit" src="../fabacademy/images/week5/gemedge.jpg"><br><br>
      <p>In the next print, I used the same layer height for all layers. I printed a simple pick and place plier using a bent compliant joint.</p>
      <p><img class="img-fit" src="../fabacademy/images/week5/simpleplier.gif"><br><br>
      <p>Simple nose-end tweezers:</p>
      <p><img class="img-fit" src="../fabacademy/images/week5/simpletweezers.jpg"><br><br>
      <p>Used the transformed chopstick geometry, modifoed it for the tweezers:
      <img class="img-fit" src="../fabacademy/images/week5/comptweezers.jpg"><br><br>
      <p>The bending details were too small, they broke while I was trying to clean them up.</p>
      <p><img class="img-fit" src="../fabacademy/images/week5/brokentweezers.jpg"><br><br>
      <p>Overall, I made some small experiments with simple tools. I hope to remake the tweezer with the semi-compliant mechanism again after modifying the design.</p>
      <p><img class="img-fit" src="../fabacademy/images/week5/lot.jpg"><br><br>
      <p>Useful reference: </p>
      <a href="https://www.3dhubs.com/knowledge-base/">Design for 3d printing tutorials</a>
      <h3>For next time</h3>
      If I can have more time on the machines I can modify the mechanisms by trying out various different tollerences, size and setting. And maybe make a small set of complaint mechanism tools.</p>
      <h2>Photogrammetry</h2>
      <p>I used Agisoft Metashape to make a pointcloud. I followed this <a href="https://agisoft.freshdesk.com/support/solutions/articles/31000152092-3d-model-reconstruction">tutorial by Agisoft</a>.</p>
      <p>I clicked 53 images of the object on a plain background from all around.
      Steps to make a pointcloud: </p>
      <ol>
      <li>Workflow &gt; Add photos </li>
      <li>Workflow &gt; Align Photos (this step take some time depending on the number of key point limit and tie point limit you set.) </li>
      <li>Some photos failed to align, but I got 9003 points </li>
      <li>Workflow &gt; Build dense cloud - medium quality. </li>
      <li>Workflow &gt; Build Mesh </li>
      <li>Workflow &gt; Build textures </li>
      </ol>
      <p>The process:
      <img class="img-fit" src="../fabacademy/images/week5/agisoft.gif" alt="metashape"></p>
      <p>The output:</p>
      <div class="sketchfab-embed-wrapper">
      <iframe title="A 3D model" width="640" height="480" src="https://sketchfab.com/models/a3fdb19895234d9f9834fb48305ed7a4/embed?autospin=0.2&amp;camera=0" frameborder="0" allow="autoplay; fullscreen; vr" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
      <p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;">
      <a href="https://sketchfab.com/3d-models/nut-and-bolt-a3fdb19895234d9f9834fb48305ed7a4?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Nut and bolt</a>
      by <a href="https://sketchfab.com/emaitee?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">emaitee</a>
      on <a href="https://sketchfab.com?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Sketchfab</a>
      </p>
      </div>
      <h2>3D Scanning</h2>
      <p>I used a Roland Modela MDX-20 to scan the same object.
      I used the <a href="http://fab.academany.org/2018/labs/barcelona/students/jeanbaptiste-natali/download/scanning_with_mdx-20_step_by_step.pdf">step-by-step manual</a> for this.
      <img class="img-fit" src="../fabacademy/images/week5/nutbolt.jpg" alt="nutbolt"></p>
      <p>Stuck the bolt and nut using a double sided tape on the raised level bed.
      <img class="img-fit" src="../fabacademy/images/week5/setup.jpg" alt="setup">
      I set the scanning area, as close to the object as possible. And a scanning grid of 0.5mm on both X and Y axes.</p>
      <p>The output:
      <img class="img-fit" src="../fabacademy/images/week5/output.jpg" alt="output"></p>
      <div class="sketchfab-embed-wrapper">
      <iframe title="A 3D model" width="640" height="480" src="https://sketchfab.com/models/c7382a9ac481437c8df7386913506f23/embed?autospin=0.2&amp;camera=0" frameborder="0" allow="autoplay; fullscreen; vr" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
      <p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;">
      <a href="https://sketchfab.com/3d-models/3d-scanned-nut-and-bolt-c7382a9ac481437c8df7386913506f23?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">3D scanned nut and bolt</a>
      by <a href="https://sketchfab.com/emaitee?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">emaitee</a>
      on <a href="https://sketchfab.com?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Sketchfab</a>
      </p>
      </div>
      <h3>Design files</h3>
      <p><a href="../fabacademy/images/week5/clampsandclips.3dm.zip">All 3D models for printing</a><br>
      <a href="../fabacademy/images/week5/clay.probe.scan.stl.zip">Probe scan of a lump of clay</a><br>
      <a href="../fabacademy/images/week5/photogrammetry.obj.zip">Photogammetry of nut and bolt</a><br>
      <a href="../fabacademy/images/week5/probescan.zip">Probe scan of nut and bolt</a><br>
      <a href="../fabacademy/images/week5/reference.file.zip">These transformed chopsticks</a></p>
      </section>
      </section>
      <div class="footer">
      <div class="row">
      <div class="col-md-2">
      <p>&copy; 2019-20 <a href="https://www.linkedin.com/in/mitaleeparikh">Mitalee Parikh</a></p>
      </div>
      <div class="col-md-7">
      <p>This site is a documentation of my work done in 2019-2020 as a part of the <a href="https://mdef.iaac.net">Master in Design for Emergent Futures</a> programme at the <a href="https://iaac.net/educational-programmes/masters-programmes/master-in-design-for-emergent-futures-mdef/">Institute of Advanced Architecture of Catalonia</a> and <a href="https://elisava.net/en">Elisava Barcelona School of Design and Engineering</a> in collaboration with <a href="https://fabacademy.org/">FabAcademy.</p>
      </div>
      <div class="col-md-2">
      </div>
      <div class="col-md-1">
      <a href="https://www.instagram.com/emaitee/"><img class="img-fit" src="../meta/icons/011-cd.png" height="20" width="20">&ensp;
      <a href="https://www.goodreads.com/review/list/5828563-mitalee-parikh?shelf=mdef"><img class="img-fit" src="../meta/icons/013-radar.png" height="20" width="20">&ensp;
      <a href="https://twitter.com/MitaleeParikh"><img class="img-fit" src="../meta/icons/009-photos.png" height="20" width="20">
      </div>
      </div>
      </div>
      </body>
      </html>
      0% or .
      You are about to add 0 people to the discussion. Proceed with caution.
      Finish editing this message first!
      Please register or to comment