Graywolf
01-23-2010, 11:15 AM
Music to dry sift by!
I recently noticed a post on a thread having their way with S Sam, suggesting that a radio speaker might be a good way to refine kief, and decided to share this experiment in process.
I originally envisioned building a vibratory dry sieve using the current technology of an eccentric weight on a motor, oriented on the correct plane to produce the motion desired, and with the vibrational frequency controlled by a variable speed drive. In discussing it amongst our geek squad brain childs, it was pointed out to me that a subwoofer driver could provide the frequency and amplitude required for the process and could be run from the speaker output of the average stereo.
Immediately mine and the others minds in the room soared to wondering what artist’s music would produce the most product in the shortest amount of time, with the least contaminants, but alas it turns out to be both simpler than that, and more complicated.
I built a prototype shaker to test the theory and solicited the aid of our audio technician to provide the drivers for a 1960’s era 10” woofer that I salvaged out of my old Fisher 3 way speaker.
Using either an I pod for music, or a signal generator through our own home made 40 watt amplifier, we found that in general, the music provided little sieving action using my specific design, but hit its sympathetic harmonics and worked very well using a square wave signal at about 30 hertz. That means that you can hook the device up to your stereo’s speaker output and plug in a CD with a 30herz square wave signal and be in production.
The task that I have therefore challenged our in house audio genus with, is to incorporate or overlay music over the 30 hertz beat, so that we can sieve to something provocative. Let’s see how they do. Hee, hee, hee………………………….
GW
I recently noticed a post on a thread having their way with S Sam, suggesting that a radio speaker might be a good way to refine kief, and decided to share this experiment in process.
I originally envisioned building a vibratory dry sieve using the current technology of an eccentric weight on a motor, oriented on the correct plane to produce the motion desired, and with the vibrational frequency controlled by a variable speed drive. In discussing it amongst our geek squad brain childs, it was pointed out to me that a subwoofer driver could provide the frequency and amplitude required for the process and could be run from the speaker output of the average stereo.
Immediately mine and the others minds in the room soared to wondering what artist’s music would produce the most product in the shortest amount of time, with the least contaminants, but alas it turns out to be both simpler than that, and more complicated.
I built a prototype shaker to test the theory and solicited the aid of our audio technician to provide the drivers for a 1960’s era 10” woofer that I salvaged out of my old Fisher 3 way speaker.
Using either an I pod for music, or a signal generator through our own home made 40 watt amplifier, we found that in general, the music provided little sieving action using my specific design, but hit its sympathetic harmonics and worked very well using a square wave signal at about 30 hertz. That means that you can hook the device up to your stereo’s speaker output and plug in a CD with a 30herz square wave signal and be in production.
The task that I have therefore challenged our in house audio genus with, is to incorporate or overlay music over the 30 hertz beat, so that we can sieve to something provocative. Let’s see how they do. Hee, hee, hee………………………….
GW