Summary

What could be more irritating than a snare drum? How about a rotary, rapid-fire snare drum! It works by coupling a ratchet-type noisemaker to a drum-like membrane. It is both loud and obnoxious. Included are ratchets with different numbers of teeth, producing sounds ranging from a merely annoying rat-a-tat-tat to a head-splitting drone. Who thought up this #MakeItLoud challenge, anyway?

Video: https://youtu.be/K0ztA5yayeA

Print Settings

Rafts:

No

                                            <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.2mm</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>20%</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>Use 0.2mm layers for all layers, including the first layer, to ensure that the drum membrane is exactly 3 layers thick.</p></div>

Post-Printing

Assembly

            <div><ul><li>Clean out any strings or blobs on the drum left over from printing - particularly in the slot in the bottom and in the holes for the spinner handle.  </li><li>Snap the thwacker bar into the slot in the bottom of the drum.  The bottom of the bar should sit flat against the bottom of the drum.</li><li>Place the ratchet in the gap between the arms sticking up from the drum and insert the spinner handle through the holes.  Make sure the oblong slot in the ratchet lines up with the flat sides of the handle.  The handle and ratchet should spin freely.</li><li>Give it a spin!  Warning: this thing is really loud and may scare children and pets.</li></ul></div>

How I Designed This

The only tricky part of this design was figuring out how to attach the thwacker to the drum membrane. The printing orientation for the drum is fixed because the only reliable way to print a thin, strong membrane is to have it print directly on the build platform. With that orientation, printing the thwacker as part of the membrane would apply the maximum stress directly the the weak layer lines. Printing the thwacker as a separate part on its side makes it much stronger, but it took a couple of iterations to design a clip into the membrane to securely hold the thwacker in place.

Rotary Snare Drum