Motor Decouple-Damper
prusaprinters
<p>update 2. Nov 2022</p><p>Different heights of the big shoulder of the pulleys from different vendors. forced me to make different versions of the <strong>L</strong> mount. So measure your pulley and chose the correct mount.<br>and <strong>R</strong> mount is corrected by 0.2</p><figure class="image image_resized" style="width:75.13%;"><img src="https://media.printables.com/media/prints/299097/rich_content/ffcf4195-6ada-464c-9090-0a14d2413e0b/2022-11-02-17_55_01-window.png#%7B%22uuid%22%3A%228bafd16f-aa1e-4adf-9095-b2ca5df77e61%22%2C%22w%22%3A1060%2C%22h%22%3A743%7D"></figure><p> </p><p> </p><p><strong>BOM</strong><br>1 pcs ø5x55 D-shaft (grind 5mm off a 60mm ore just leave it at 60mm)<br>1 pcs ø5x60 D-shaft <a href="https://de.aliexpress.com/item/1005003428332649.html">https://de.aliexpress.com/item/1005003428332649.html</a> <br>4 pcs bearings 695zz <br>4 pcs 1mm shims ID5 OD8 <br>1 pcs 6mm shim ID5 OD10 <br>2 pcs spring couplers 2x ID5 OD19-L25 ( important ID5 in both ends )<br>2 pcs stepper dampers <br>8 pcs M3x40 (old is 35) (mount to Ratrig motor plates)<br>4 pcs M3x10 (damper-mount) <br>4 pcs M3x6 (damper-motor)<br>8 pcs M3x6 heat inserts<br>4 pcs M3 washer</p><p> </p><p><strong>print them</strong></p><p>With no support</p><p> </p><p><strong>prep the parts</strong></p><ol><li>only the top 4 holes have inserts </li><li>important that they are mounted opposite the top surface <br>(to give full strength the the part)</li><li>take a longer M3 screw put through the top holes</li><li>screw on heat insert to M3</li><li>heat up with a lighter or solder iron</li><li>pull the insert into place<br> </li></ol><p><strong>building instructions </strong></p><ol><li>press bearings in part</li><li>install D-shaft with a 1mm shim in both ends </li><li>place pulley on top <strong>R</strong> ----- and 6mm shim and pulley on top <strong>L</strong></li><li>place spring coupler on bottom </li><li>hold the assembly gentle together wile the small screws are tightened in to the D-shaft</li><li>mount damper to the motor (thru the 2x Ø3.5 holes) with M3x6 screws</li><li>mount assembly to the damper with M3x10 screws and washers</li><li>tighten the little screw in the spring coupler to the motor shaft</li><li>mount the whole assembly to the printer</li></ol><p><strong> L</strong> Assembly</p><figure class="image image_resized" style="width:75.14%;"><img src="https://media.printables.com/media/prints/299097/rich_content/83dec574-e6ac-4770-9faf-6290ba3e71fc/left-asemply.png#%7B%22uuid%22%3A%2283752116-a1ce-48f6-94a3-200cfb127cb3%22%2C%22w%22%3A943%2C%22h%22%3A560%7D"></figure><p> </p><p><strong> R</strong> Assembly</p><figure class="image image_resized" style="width:73.73%;"><img src="https://media.printables.com/media/prints/299097/rich_content/386839c8-f4ff-4aa2-8c8c-e14a621fd2c8/r-asempley.png#%7B%22uuid%22%3A%225b21ffef-5342-41c7-8f15-439d8774a072%22%2C%22w%22%3A988%2C%22h%22%3A561%7D"></figure><p> </p><p> </p><p>A nice side effect is that it positions the motor pulleys automatically in the correct height for the belt path</p><p> </p><p>here are a video with them installed </p><p><a href="https://www.youtube.com/shorts/xXyZ0F98PXg">https://www.youtube.com/shorts/xXyZ0F98PXg</a></p><p> </p><p>If you like my design feel free to donate me a cup of coffee :-)</p><p> </p>
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