retractaWDT - a retractable WDT Tool for Baristas

prusaprinters

<p>I love espresso. I love making espresso.&nbsp;</p><p><strong>But I hate needles!</strong></p><figure class="image image_resized image-style-align-center" style="width:66.71%;"><img src="https://media.printables.com/media/prints/320491/rich_content/8bb750d0-ba2d-4b6f-9982-b4c2ed1187d6/pxl_20221119_135720857.jpg#%7B%22uuid%22%3A%2260e6f36c-d5d8-422f-ba2d-709a01ef530e%22%2C%22w%22%3A2586%2C%22h%22%3A2586%7D"></figure><h3>What is this thing?</h3><p>A WDT tool is used to stir freshly ground coffee. By distributing the powder evenly you reduce the chance of channelling and your espresso is always perfect (no guarantee!).</p><p>Many WDT tools use acupuncture needles because they are very fine and work great. <strong>BUT I HATE NEEDLES!</strong></p><p>My take with this tool was to hide the pointy end of the needles when the tool is not in use.</p><h3>What do you need?</h3><figure class="image image-style-align-right image_resized" style="width:37.04%;"><img src="https://media.printables.com/media/prints/320491/rich_content/f8b56988-1cb6-4a1a-9d28-4e47b67a99c4/pxl_20221119_133354596.jpg#%7B%22uuid%22%3A%22b1ec22d9-e883-480d-9a46-140fa149a8ca%22%2C%22w%22%3A1720%2C%22h%22%3A1720%7D"></figure><ul><li>Some 3d-printed parts<ul><li>retractaWDT_upper</li><li>retractaWDT_middle</li><li>retractaWDT_lower</li><li>retractaWDT_shaft</li><li>retractaWDT_cap <i>(optional for extra safety)</i></li><li>retractaWDT_sleeve <i>(optional for extreme safety)</i></li></ul></li><li>a very short piece of extra filament</li><li>2x magnets (6mm diameter/ 2mm height) <i>(only needed if you want the cap or the sleeve)</i></li><li>8 acupuncture needles*&nbsp;</li></ul><p>*I am using the same needles that come with some 3d-printers to unclog nozzles. You can buy them all over the net. Watch out for the following sizes:</p><ul><li>0.35x75mm or 0.4x75mm</li><li>I got a whole bunch of them here: <a href="https://www.aliexpress.com/item/1005001467649993.html">https://www.aliexpress.com/item/1005001467649993.html</a>&nbsp;</li></ul><h3>How do you print it?</h3><figure class="image image-style-align-left image_resized" style="width:33.41%;"><img src="https://media.printables.com/media/prints/320491/rich_content/2931b988-3ed9-48e8-97b5-be98ec389556/wdt_slicer.png#%7B%22uuid%22%3A%2277a3fc1c-c98a-452c-b2f2-4db9aa2a730e%22%2C%22w%22%3A589%2C%22h%22%3A589%7D"></figure><p>I used my Original Prusa MK3S with MMU2S and some modifications.</p><p>0.2mm layers, standard profile.</p><p>You have to orient some of the parts for easiest printing (look at the picture).</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><h3>How do you assemble it?</h3><figure class="table"><table style="background-color:#E0E0E0;border:1px solid #fa6831;"><tbody><tr><td><figure class="image image_resized" style="width:100%;"><img src="https://media.printables.com/media/prints/320491/rich_content/0242f2a7-5ed8-4074-b005-210fe203aeaf/pxl_20221119_133419084.jpg#%7B%22uuid%22%3A%223f98b33b-704d-4d7e-b622-b340c270d905%22%2C%22w%22%3A1512%2C%22h%22%3A1512%7D"></figure></td><td>Insert the shaft into the middle piece.</td></tr><tr><td><figure class="image image_resized" style="width:100%;"><img src="https://media.printables.com/media/prints/320491/rich_content/630fbfe5-cbff-4239-813a-6e074f75932a/pxl_20221119_133439727.jpg#%7B%22uuid%22%3A%22e72bdbfe-8691-4e5b-81fd-256cee3b9984%22%2C%22w%22%3A1220%2C%22h%22%3A1220%7D"></figure></td><td>Click the shaft into the lower piece. Watch out: There is a wrong an a right direction to do this. If it clicks in, you did it right!</td></tr><tr><td><figure class="image image_resized" style="width:100%;"><img src="https://media.printables.com/media/prints/320491/rich_content/df3e3bd3-d1eb-4ea5-8897-1e8a0cdf9580/pxl_20221119_133511225.jpg#%7B%22uuid%22%3A%22e3213021-8e1e-4161-a6ab-b231d81122b4%22%2C%22w%22%3A1940%2C%22h%22%3A1940%7D"></figure></td><td>Insert a short piece of filament (1cm is enough) in the hole in the bottom of the lower part. It blocks the shaft from coming of.</td></tr><tr><td><figure class="image image_resized" style="width:100%;"><img src="https://media.printables.com/media/prints/320491/rich_content/9d28bfa2-ad51-4fe2-949a-8f08880d2581/pxl_20221119_133618319.jpg#%7B%22uuid%22%3A%227ccbe47f-7c68-4487-9f40-7e3847002a7a%22%2C%22w%22%3A2196%2C%22h%22%3A2196%7D"></figure></td><td><p><i>This step is only needed if you want to use a cap or the sleeve:</i></p><p><i>Insert magnets in the lower part an in the cap/sleeve.</i></p></td></tr><tr><td><figure class="image image_resized" style="width:100%;"><img src="https://media.printables.com/media/prints/320491/rich_content/64769e7a-a1f2-40a6-a039-c2f7044447f9/pxl_20221119_133738218.jpg#%7B%22uuid%22%3A%2202fb04e1-f08b-4163-b1aa-26f661611e96%22%2C%22w%22%3A1120%2C%22h%22%3A1120%7D"></figure></td><td><p>Insert the needles.</p><p>This step may be traumatic or satisfying.</p><p>Please be patient!</p></td></tr><tr><td><figure class="image image_resized" style="width:100%;"><img src="https://media.printables.com/media/prints/320491/rich_content/ff2d896b-d06f-41e9-a6b2-126a54f6751c/pxl_20221119_134003627.jpg#%7B%22uuid%22%3A%22e5fab40f-9ff4-48d9-a8fa-376b54907b04%22%2C%22w%22%3A1820%2C%22h%22%3A1820%7D"></figure></td><td>Push the needles all the way in and move the middle part up.</td></tr><tr><td><figure class="image image_resized" style="width:100%;"><img src="https://media.printables.com/media/prints/320491/rich_content/5f75f9d0-2dd0-41b7-b08f-0ed3377b1603/pxl_20221119_134322491.jpg#%7B%22uuid%22%3A%22c96dd662-5d13-4ac8-96ee-c92b57662cb0%22%2C%22w%22%3A1824%2C%22h%22%3A1824%7D"></figure></td><td><p>Screw the top part on.</p><p>If you use PETG this is gonna be really tight. PETG on PETG produces a lot of friction. It may help to warm the threads of the middle part with a lighter.</p></td></tr><tr><td><figure class="image image_resized" style="width:100%;"><img src="https://media.printables.com/media/prints/320491/rich_content/d788ceda-efd3-46de-922f-3d28ab2f18e3/pxl_20221119_134359459.jpg#%7B%22uuid%22%3A%22603b5810-7994-4a23-a483-1d79e2b4394b%22%2C%22w%22%3A1144%2C%22h%22%3A1144%7D"></figure></td><td><p>You did it!</p><p>Go make an amazing espresso!</p></td></tr></tbody></table></figure><p>&nbsp;</p>