Extruder Calibration (Part Fitting) Test

prusaprinters

<p>A simple test for parts fitting. If the printer is properly set, the two parts should snugly fit each other, like two Lego blocks.</p> <p>You should repeat prints while adjusting<em>Extrusion Multiplier</em> or<em>Filament Flow Live Tuning</em> (depending on your software and printer), until the two parts snugly fit. The<em>XY Size Compensation</em> should not be used if extrusion is properly set!</p> <p>The process should be done for each new roll of filament.</p> <p>Unlike the <a href="https://www.thingiverse.com/thing:342198">original object</a>, this one has a<strong>lower base</strong> to increase printing speed and a<strong>groove on the top of both parts</strong> to mark the proper orientation.</p> <h3>NOTE</h3> <p><em>The layering effect affects the resulting inner and outer dimensions of printed objects. It can be more or less pronounced on your printer and settings, so your mileage may vary.<br/> It also depends on your exact filament diameter and its consistency, so on a properly calibrated printer with a quality filament, the resulting extrusion multiplier will always be a few percents lower than 100%. Therefore, this is more of a "part fitting" rather than "exact extrusion" calibration (see <a href="https://mattshub.com/2017/04/19/extruder-calibration/">https://mattshub.com/2017/04/19/extruder-calibration/</a> for the extruder steps calibration).</em></p> <h5>Calibration Process</h5> <ol> <li>Print the objects. Wait until it cools down before removing from the print-bed.</li> <li>Try to plug one object into the other.<em>Be careful, the orientation<strong>does</strong> matter!</em><br/> a) If the objects can't fit,<strong>lower</strong> the<em>Extrusion Multiplier</em> or<em>Flow</em> and repeat.<br/> b) If the objects fit too loosely,<strong>increase</strong> the<em>Extrusion Multiplier</em> or<em>Flow</em> and repeat.<br/> c) If the two fit snugly (you can snap them together, but to disconnect them you need to use a tool), you're fine - the calibration is done! ###### Example:</li> </ol> <ul> <li>Start with EM value of<strong>1.0</strong>. Slice and print the two parts.</li> <li>If the parts can not fit, decrease to<strong>0.9</strong>.</li> <li>If they still can not fit, decrease to<strong>0.8</strong>.</li> <li>Now your parts are too loose. Now use<strong>0.85</strong> (which is half the way between 0.8 and 0.9)</li> <li>If the fit is still too loose, use value<strong>0.875</strong> (which is half the way between 0.85 and 0.9)</li> <li>If the fit is now too tight, use value<strong>0.863</strong> (which is half the way between 0.85 and 0.875)</li> <li><p>This value should be fine. It should be enough to round EM value to 3 decimals. ##### Update 2017-09-06</p> </li> <li><p>Added a groove on the top of both parts, in order to identify correct orientation.</p> </li> </ul> Category: 3D Printing Tests