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<li class="nav-item" data-level="1"><a href="#week-03-computer-controlled-cutting" class="nav-link">Week 03. Computer-Controlled Cutting</a>
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<li class="nav-item" data-level="2"><a href="#1-characterize-my-lasercutters-parameters" class="nav-link">1. Characterize my lasercutter's parameters</a>
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<li class="nav-item" data-level="2"><a href="#2-cut-a-logo-sticker-on-vinylcutter" class="nav-link">2. Cut a logo sticker on vinylcutter</a>
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<li class="nav-item" data-level="2"><a href="#3-make-a-parametric-construction-kit-with-lasercutter" class="nav-link">3. Make a parametric construction kit with lasercutter</a>
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<h1 id="week-03-computer-controlled-cutting">Week 03. Computer-Controlled Cutting</h1>
<h2 id="assignments-for-this-week">Assignments for this week</h2>
<p>Group assignment</p>
<ul>
<li>characterize your lasercutter's focus, power, speed, rate, kerf, joint clearance and types</li>
</ul>
<p>Individual assignment</p>
<ul>
<li>cut something on the vinylcutter</li>
<li>design, lasercut, and document a parametric construction kit<ul>
<li>account for the lasercutter kerf</li>
<li>the kit must be able to be assembled in multiple ways</li>
<li>(for extra credit) include elements that aren't flat</li>
</ul>
</li>
</ul>
<h2 id="what-ive-done-this-week">What I've done this week</h2>
<ol>
<li>Characterize my lasercutter's parameters<ul>
<li>About my lasercutter</li>
<li>How to characterize</li>
<li>Results of tests</li>
<li>Parameters I recomand</li>
</ul>
</li>
<li>Cut a logo sticker on vinylcutter<ul>
<li>Design a logo</li>
</ul>
</li>
<li>Make a parametric construction kit with lasercutter<ul>
<li>Design a construction kit</li>
<li>Parameterize the constructoin kit</li>
<li>Lasercut the construction kit</li>
<li>Play with the constructionkit</li>
</ul>
</li>
</ol>
<h2 id="1-characterize-my-lasercutters-parameters">1. Characterize my lasercutter's parameters</h2>
<h3 id="trotec-speedy-100">Trotec Speedy 100</h3>
<p><img alt="Trotec Speedy 100" src="../../images/week03/trotec.jpg" /></p>
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<p>Technical data of Trotec Speedy 100</p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Working area</td>
<td>608 x 303 mm</td>
</tr>
<tr>
<td>Max. height of workspace</td>
<td>170 mm</td>
</tr>
<tr>
<td>Laser type</td>
<td>CO2</td>
</tr>
<tr>
<td>Laser class</td>
<td>2</td>
</tr>
<tr>
<td>Focus length</td>
<td>2inches (approx. 5 cm)</td>
</tr>
<tr>
<td>Max. processing speed</td>
<td>2.8 m/s</td>
</tr>
<tr>
<td>Max. acceleration</td>
<td>40 m/s²</td>
</tr>
</tbody>
</table>
<h3 id="how-to-characterize">How to characterize</h3>
<p>In Jobcontrol for trotec you set the scanning speed, laser power, pulse rate and scanning iteration.</p>
<p>I made a design to test the scanning speed and laser power for both cutting and engraving.</p>
<p>You can define 16 different laser conditions at a time.the 16 laser conditions are identified by colors on the following table:</p>
<table>
<thead>
<tr>
<th>No</th>
<th>Color</th>
<th>R</th>
<th>G</th>
<th>B</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>Black</td>
<td>0</td>
<td>0</td>
<td>0</td>
</tr>
<tr>
<td>2</td>
<td>Red</td>
<td>255</td>
<td>0</td>
<td>0</td>
</tr>
<tr>
<td>3</td>
<td>Blue</td>
<td>0</td>
<td>0</td>
<td>255</td>
</tr>
<tr>
<td>4</td>
<td>Desert</td>
<td>51</td>
<td>102</td>
<td>153</td>
</tr>
<tr>
<td>5</td>
<td>Cyan</td>
<td>0</td>
<td>255</td>
<td>255</td>
</tr>
<tr>
<td>6</td>
<td>Green</td>
<td>0</td>
<td>255</td>
<td>0</td>
</tr>
<tr>
<td>7</td>
<td>Grass</td>
<td>0</td>
<td>153</td>
<td>51</td>
</tr>
<tr>
<td>8</td>
<td>Forest</td>
<td>0</td>
<td>102</td>
<td>51</td>
</tr>
<tr>
<td>9</td>
<td>Olive</td>
<td>153</td>
<td>153</td>
<td>51</td>
</tr>
<tr>
<td>10</td>
<td>Brown</td>
<td>153</td>
<td>102</td>
<td>51</td>
</tr>
<tr>
<td>11</td>
<td>Walnut</td>
<td>102</td>
<td>51</td>
<td>0</td>
</tr>
<tr>
<td>12</td>
<td>Plum</td>
<td>102</td>
<td>0</td>
<td>102</td>
</tr>
<tr>
<td>13</td>
<td>Purple</td>
<td>153</td>
<td>0</td>
<td>204</td>
</tr>
<tr>
<td>14</td>
<td>Magen</td>
<td>255</td>
<td>0</td>
<td>255</td>
</tr>
<tr>
<td>15</td>
<td>Orange</td>
<td>255</td>
<td>102</td>
<td>0</td>
</tr>
<tr>
<td>16</td>
<td>Yellow</td>
<td>255</td>
<td>255</td>
<td>0</td>
</tr>
</tbody>
</table>
<p>I designed the test model as the following images. </p>
<p><img alt="trotec test" src="../../images/week03/trotec_test.jpg" /></p>
<p>I made this vector model in a SVG file, and ran the laser cutter row by row changing the the scanning speed every time.</p>
<h3 id="results-of-tests">Results of tests</h3>
<p>Results from the Engraving test - Acrylic 2 mm:</p>
<p><img alt="engraving acrylic 2 mm" src="../../images/week03/test_engrave.JPG" /></p>
<p><img alt="cutting acrylic 2 mm" src="../../images/week03/test_cut1.JPG" />
<img alt="cutting acrylic 2 mm" src="../../images/week03/test_cut1_side.JPG" /></p>
<p>From the cutting test, little conditions came out to completely cut. So, I tried scanning twice with the same conditions.</p>
<p><img alt="cutting acrylic 2 mm twice" src="../../images/week03/test_cut2.JPG" />
<img alt="cutting acrylic 2 mm twice" src="../../images/week03/test_cut2_side.JPG" /></p>
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<h3 id="parameters-i-recomand">Parameters I recomand</h3>
<p>From the results, the following laser parameters:</p>
<table>
<thead>
<tr>
<th></th>
<th>Engrave</th>
<th>Cut</th>
</tr>
</thead>
<tbody>
<tr>
<td>Power</td>
<td>100%</td>
<td>100%</td>
</tr>
<tr>
<td>Speed</td>
<td>50%</td>
<td>1%</td>
</tr>
<tr>
<td>Iteration</td>
<td>1 time</td>
<td>2 times</td>
</tr>
</tbody>
</table>
<h3 id="check-kerf">Check kerf</h3>
<p>I used <a href="https://doyolab.net/appli/kerf_check/kerf_check.html">Kerf Check Parts Generator</a> to make a model to check kerfs.</p>
<p><img alt="kerf checker" src="../../images/week03/kerf_check.jpg" /></p>
<p>The joints fit best in kerf of 0.05 mm.</p>
<p><img alt="test kerf" src="../../images/week03/test_kerf.JPG" /></p>
<h2 id="2-cut-a-logo-sticker-on-vinylcutter">2. Cut a logo sticker on vinylcutter</h2>
<h3 id="design-a-logo">Design a logo</h3>
<p>For the vinylcutter assignment I decided to make a logo stick.
I planend the logo to be a homage of my final project.
I'm planning my final project to be a lamp with lattice shells.
So, I designed my logo as a perspective view of a lattice shell.</p>
<h3 id="prepare-a-model-to-vinylcut">Prepare a model to vinylcut</h3>
<p><strong>Step1.</strong> Make a 3D model of lattice shell.</p>
<p><img alt="prepare vinyl model 1" src="../../images/week03/vinyl_prepare1.jpg" /></p>
<p><strong>Step 2.</strong> Cut the shell with a plane.</p>
<p><img alt="prepare vinyl model 2" src="../../images/week03/vinyl_prepare2.jpg" /></p>
<p><strong>Step 3.</strong> Project to the plane.</p>
<p><img alt="prepare vinyl model 3" src="../../images/week03/vinyl_prepare3.jpg" /></p>
<p><strong>Step 4.</strong> Move the projection to the base plane.</p>
<p><img alt="prepare vinyl model 4" src="../../images/week03/vinyl_prepare4.jpg" /></p>
<p><strong>Step 5.</strong> Fill the part</p>
<p><img alt="prepare vinyl model 5" src="../../images/week03/vinyl_prepare5.jpg" /></p>
<p><strong>Step 6.</strong> Turn the figure into binary image</p>
<p>First I turn the boundary into binary image.
In the next step I turn trace bitmap to turn the raster image into vector image.
However, if the boundary was binary, the boundaries become double lines and the vinyl cutter will cut the lines twice.</p>
<p><img alt="vinyl model 1" src="../../images/week03/vinyl_pattern.jpg" /></p>
<p>So, when you make the binary image you must fill the model with either black or white.</p>
<p><img alt="vinyl model2" src="../../images/week03/vinyl_pattern2.jpg" /></p>
<p><strong>Step 7.</strong> Make vector image.</p>
<p>Trace bitmap in inkscape and save it as an EPS file.</p>
<p><img alt="vinyl model2" src="../../images/week03/vinyl_pattern2_vector.jpg" /></p>
<div class="admonition caution">
<p class="admonition-title">Caution</p>
<p>I could not export EPS files in inkscape for Mac. So, I did it in Windows.</p>
</div>
<p>Now I am ready to vinylcut!</p>
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<h3 id="cut-logo-with-vinylcutter">Cut logo with vinylcutter</h3>
<p>The vinylcutter I used was Graphtec Craft Robo Pro.</p>
<p><img alt="vinylcuttter" src="../../images/week03/vinylcutter.jpeg" /></p>
<p>Insert vinyl in to the cutter from the back.</p>
<p><img alt="vinylcut1" src="../../images/week03/vinylcut1.jpg" /></p>
<p>Set the blade</p>
<p><img alt="vinylcut1" src="../../images/week03/vinylcutter_setblade.jpeg" /></p>
<p>Here are the settings of the cutter:</p>
<p><img alt="vinylcut1" src="../../images/week03/vinylcutter_settings.jpeg" /></p>
<p>Set thr cutter to the initial position.</p>
<p><img alt="vinylcut2" src="../../images/week03/vinylcut2.jpg" /></p>
<p>Load SVG EPS file to Graphtec Studio.</p>
<p><img alt="vinylcut3" src="../../images/week03/vinylcut3.jpg" /></p>
<p>View cutting ploter</p>
<p><img alt="vinylcut4" src="../../images/week03/vinylcut4.jpg" /></p>
<p>Send data to the cutter</p>
<p><img alt="vinylcut5" src="../../images/week03/vinylcut5.jpg" /></p>
<p>Cut with vinylcutter</p>
<p><img alt="vinylcut6" src="../../images/week03/vinylcut6.jpg" /></p>
<p>Remove vinyl from the cutter</p>
<p><img alt="vinylcut_remove" src="../../images/week03/vinylcut_remove.jpg" /></p>
<p>Cut off area with the logo</p>
<p><img alt="vinylcut7" src="../../images/week03/vinylcut7.jpg" /></p>
<p>Remove the parts you don't need</p>
<p><img alt="vinylcut8" src="../../images/week03/vinylcut8.jpg" /></p>
<p>Transfer the logo to a transfer sheet</p>
<p><img alt="vinylcut9" src="../../images/week03/vinylcut9.jpg" /></p>
<p>Finish!</p>
<p><img alt="vinylcut10" src="../../images/week03/vinylcut10.jpg" /></p>
<p>Stick the logo to my PC.</p>
<p><img alt="vinylcut finish" src="../images/week03/vinylcut_finish.jpg" /></p>
<h2 id="3-make-a-parametric-construction-kit-with-lasercutter">3. Make a parametric construction kit with lasercutter</h2>
<h3 id="design-a-parametric-construction-kit">Design a parametric construction kit</h3>
<p>I designed a parameteric construction kit that could be constructed in 2 ways:</p>
<ol>
<li>press-fit with chamfer</li>
<li>insert sticks in holes</li>
</ol>
<p>The main part of the kit is a right polygon with a groove for press-fit on the center of each edges and a hole on each corner.
After, designing an edge I used circular pattern to make it a polygon.</p>
<p><img alt="kit design1" src="../../images/week03/kit1.jpg" />
<img alt="kit design2" src="../../images/week03/kit2.jpg" /></p>
<p>I also designed a support part to insert in holes.</p>
<p><img alt="kit design3" src="../../images/week03/kit3.jpg" />
<img alt="kit design4" src="../../images/week03/kit4.jpg" /></p>
<p>Here are the parameters for the kit.</p>
<p><img alt="kit param" src="../../images/week03/kit_parameters.jpg" /></p>
<h3 id="lasercut-the-construction-kit">Lasercut the construction kit</h3>
<p>I made a SVG file for laser cutting.</p>
<p><img alt="kit lasercut1" src="../../images/week03/kit_lasercut.jpg" /></p>
<p>Laser cutted the kit</p>
<p><img alt="kit lasercutting" src="../../images/week03/lasercutting.jpeg" /></p>
<p>This is how my kit looks like:</p>
<p><img alt="kit lasercutting" src="../../images/week03/kit_output.jpg" /></p>
<h3 id="play-with-the-construction-kit">Play with the construction kit</h3>
<p>Constructing the kit only with press-fit:</p>
<p><img alt="kit construct1" src="../../images/week03/kit_construct1.JPG" /></p>
<p>Constructing the kit with press-fit & inserting:</p>
<p><img alt="kit construct2" src="../../images/week03/kit_construct2.JPG" /></p>
<h2 id="files">Files</h2>
<!-- - <a href="../files/week03/silhouette_bird.afdesign">Bird silhouette in Affinity designer (.afdesign)</a> --></div>
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