"Massomancer" part for boutique guitar design

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Shane Sanders
Posts: 2
Joined: Thu Jan 16, 2014 5:17 pm

"Massomancer" part for boutique guitar design

Post by Shane Sanders » Sun Mar 20, 2016 1:29 pm

I had great success with this aluminium part which was designed using the free CAD software from eMachineShop.com.

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From my website:

MASSOMANCER™

OPTIONAL ALUMINIUM HEADSTOCK ATTACHMENT FOR INCREASING SUSTAIN AND PUNCH

Long story short: Increased sustain and some additional clarity and fundamental punch emerges from this feature. Long story: Olympic archers with recurve bows use dampening stabilizers for a reason. Likewise, adding a few ounces of mass to the back of the headstock can mitigate dead spots and wolf tones which can emerge in all stringed instruments, sometimes coming and going due to humidity changes or string gauge choices. There can be other benefits when you manage this phenomenon with science. Oscillation of the strings happens between the witness points of the nut and the saddles, but that wave energy is transferred elsewhere through sympathetic vibrations, especially to the neck which obviously flexes dynamically under tension from the strings. From this energy the guitar's natural frequencies and mode shapes create frequency cancellation which results in notes that don't sustain as desired and other notes that are too loud in comparison with their brethren. Extra mass and stiffening added to the surface of the headstock creates greater inertia and greater inertia means increased mechanical impedance. The Massomancer features a stealthy hidden chamber with two M2.5 threaded holes available which allow additional brass, tungsten or even inexpensive neodynium magnet shims or coins to be clamped against the surface of the headstock as a means of fine-tuning the sympathetic frequencies in the neck (or you can use it to attach a headstock tuner and keep it from being visible from the front of the guitar—other uses are envisioned). Archers also study the node points on their arrows to achieve maximum stability on their release because they know there are two places on an arrow in flight which are nearly still—this knowledge affects how far they draw the arrow back. Waves are everywhere, in guitars and even in bows and arrows, so it pays dividends to manage them to your advantage.

Tech2
Posts: 1672
Joined: Wed Oct 22, 2008 6:26 pm

Re: "Massomancer" part for boutique guitar design

Post by Tech2 » Mon Mar 21, 2016 5:56 am

Thanks for posting - looks good!

Shane Sanders
Posts: 2
Joined: Thu Jan 16, 2014 5:17 pm

Re: "Massomancer" part for boutique guitar design

Post by Shane Sanders » Mon Mar 21, 2016 9:30 pm

You're welcome; Thanks!

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