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Add note for flow calibration about optional multiwall cube.

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lawgicau
2020-08-19 20:02:05 +10:00
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calibration.html
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<h5>When required:</h5>
<p>Base calibration, as well as any time there has been a change to the extruder/hot end.</p>
<h5>Tools:</h5>
<p>Your favourite slicer. Accurate vernier callipers (two decimal places is much more preferable to a set with only one).</p>
<p>Your favourite slicer. Accurate digital/vernier callipers (two decimal places is much more preferable to a set with only one).</p>
</div>
<p>Our E-steps are now correct in the firmware, so we will move on to calibrating the slicer. Each slicer has a setting to control the overall amount of filament extruded by the printer. If the flow rate is increased, more filament will be extruded. If the flow rate is decreased, less filament will be extruded.</p>
<p>In Simplify3D and PrusaSlicer, this is called <b>Extrusion Multiplier</b>. Cura calls it <b>Flow</b>.</p>
<p>My method of determining the correct flow rate is to print a hollow, single wall cube with a specified wall thickness, then measure the actual thickness of the wall and adjust the flow rate in the slicer to suit.</p>
<p>Some people prefer to have multiple walls and measure them together. For example, if the extrusion width was <b>0.4mm</b> with two perimeters, then you would be hoping to measure <b>0.8mm</b> for the cube wall. This does introduce more variables, such as the amount of perimeter overlap, and therefore a risk of the process failing. This is why I personally prefer a single wall cube, but each to their own.</p>
<p>Unfortunately, I can't provide pre-sliced gcode for this process. It is vital to use gcode generated by <i>YOUR</i> slicer. Setting up your slicer to print the cube in the right way should be simple by following these steps:</p>
<table>
<head>
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</table>
<p>Now slice and print!</p>
<h2>Interpreting Results:</h2>
<p>Use vernier callipers to measure the outer wall thickness of the hollow cube. Take measurements in multiple places/sides and average them.</p>
<p>Use digital/vernier callipers to measure the outer wall thickness of the hollow cube. Take measurements in multiple places/sides and average them.</p>
<a href="#" data-featherlight="img/measurecube.jpg"><img class="thumb" src="img/measurecube.jpg" /></a>
<p>If your measurement is <i>significantly</i> off, the following calculator can then be used to calculate the new flow rate:</p>
<table>