<p>I have a PLA 3D-printed object made of several rings with a diameter of 150 mm and a thickness of 6 mm. The height of each ring is about 30-35 mm but it does not matter so much.</p>
<p>I'm looking for a way to keep the rings together (one on top of another). I cannot place anything inside the ring (like a thicker area to host a nut). Most of the rings may have a closed top or bottom, so I cannot access the inner part.</p>
<p>I'm using three tabs (at different angles to force the correct alignment) that fit inside matching slots on the counterpart:</p>
<p><a href="https://i.stack.imgur.com/VSajN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VSajN.png" alt="enter image description here" /></a></p>
<p><a href="https://i.stack.imgur.com/IiPn8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IiPn8.png" alt="enter image description here" /></a></p>
<p>They are a bit stronger than pins and holes due to the greater surface of the base layer, but of course are useful only for alignment.</p>
<p>Due to the very small thickness of the ring I cannot place a screw inside them to keep in position, the inner wall cannot hold a screw!</p>
<p>I was thinking about L-shaped tabs and slots to fix the rings rotating them a bit, but:</p>
<ol>
<li>it would not easy to clean the horizontal leg of the slots</li>
<li>nothing would prevent to rotate the rings in the opposite way (even accidentally) so the disconnect</li>
</ol>
<p>For my use-case scenario, I don't need anything too strong. Just avoid to disconnect the rings when taking the object in hands. I tried with magnets but:</p>
<ol>
<li>to make an acceptable resistance I needed 7-8 per ring (due to their small size)</li>
<li>the electronics inside uses Hall sensors so I cannot use magnets!</li>
</ol>
<p>Any idea?</p>

[{'answer_id': 20006, 'author': 'Trish', 'author_id': 8884, 'author_profile': 'https://3dprinting.stackexchange.com/users/8884', 'pm_score': 2, 'selected': False, 'text': '<h2>[Extruder] feed rate [modifier] is used synonymous to extrusion multiplier</h2>\n<p>The feed rate of the extruder is the rate at which filament is pushed (fed) into the hotend. An overwrite value that modifies that rate from the normal rate is in most slicers called &quot;extrusion multiplier&quot;.</p>\n<p>It is a <em>quickfix</em> to manipulate print behavior, especially addressing under extrusion due to various problems, such as mis-sized filament or to compensate for deformability of it compared to the filament the extruder is calibrated for.</p>\n<p>It is however not a permanent fix. See also <a href="https://3dprinting.stackexchange.com/questions/11074/why-and-how-am-i-supposed-to-change-the-extrusion-multiplier?noredirect=1&amp;lq=1">here</a>, <a href="https://3dprinting.stackexchange.com/questions/6968/slicer-line-width-vs-extrusion-multiplier-for-layer-adhesion?noredirect=1&amp;lq=1">here</a> and <a href="https://3dprinting.stackexchange.com/questions/8382/isnt-using-the-extrusion-multiplier-like-cheating/8384#8384">here.</a></p>\n'}, {'answer_id': 20011, 'author': '0scar', 'author_id': 5740, 'author_profile': 'https://3dprinting.stackexchange.com/users/5740', 'pm_score': 1, 'selected': False, 'text': '<p>In the context of the linked source (in German <em>&quot;Die Feeding Rate sollte mit 105\xa0% eingestellt werden&quot;</em>), with <em>&quot;a feeding rate of 105\xa0%&quot;</em> is meant the extrusion multiplier (there is no reference in the source to Cura). This is explained in <a href="https://3dprinting.stackexchange.com/a/20006">this answer</a>. The answer is correct for the translation, but should have warned for the incorrect wording. Technically, <em>feed rate</em> is <strong>not</strong> a synonym for <em>extrusion multiplier</em>.</p>\n<p>The source is wrongly using the term <em>&quot;feeding rate&quot;</em>, feeding rate is the rate at which all steppers are scaled, not solely the E (extruder) stepper.</p>\n<p>In G-code this is found to be the <code>F</code> parameter, e.g. in <code>G1 F1200 X76.468 Y148.947 E0.0264</code> the feed rate of 1200\xa0mm/min is applied on all steppers, in this example X, Y and E. Changing the feed rate changes all speeds for all steppers simultaneously. This is found in G-code <a href="https://marlinfw.org/docs/gcode/M220.html" rel="nofollow noreferrer"><code>M220</code></a>.</p>\n<p>The extrusion multiplier (or known as <em>&quot;Flow Percentage&quot;</em>) only acts on the E stepper motor, this is not reflected in the G-code, but adjusted in the firmware planner. The G-code to adjust the flow percentage is <a href="https://marlinfw.org/docs/gcode/M221.html" rel="nofollow noreferrer"><code>M221</code></a></p>\n'}]
['https://3dprinting.stackexchange.com/questions/20016', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/21979/']