#3DPNSpeakerCover
this speaker cover is actually a mathematical rose. the floral pattern is actually a graphical representation of the equations r=4cos(2.5theta) and to r=3.4cos(2.5theta) they are overplayed to give the design some thickness. this rose could also be represented by r=tcos(2.5Theta) where 3.4=<t=<4. 

all those years of math pay off in their own way

"beautiful math" model made from math[ 4cos(2.5theta)].stl

beautiful math model made from math[ 4cos(2.5theta)].stl

this is an assembly of the parts for the vibro-ring system submitted to #3DPNSpeakerCover at https://thangs.com/smsandoval2019/VibroRing-Speaker-cover-for-3DPNSpeakerCover-13410

PS: yes there are two in the picture... I don't know why

assembly mk2 moving speaker comp v4.stl

#3DPNSpeakerCover this is a smaller central core for the vibro-ring speaker cover system. this should be used in place of the regular central core in any case that only one ring is set up 

stage one only central core.stl

#3DPNSpeakerCover This is a speaker cover designed to use the speaker to rotate vibration powered disks ( it looks real cool). here is the assembly for reference https://thangs.com/smsandoval2019/assembly-mk2-moving-speaker-comp-v4stl-14541

EDIT: Due to my inability to edit this page and upload new revisions of my design keeping things organized has proven difficult on thangs. Some of the tolerances are not as tuned as id like them to be because i cant find a way to remove or add new STLs to this page. I also dont want to risk disqualifying myself from the contest by uploading revised versions that might be to similar to already submitted models.This is a little frustrating becuase i think this idea is really cool. However i am going to make one more part that i will link (https://thangs.com/smsandoval2019/stage-one-only-central-corestl-14537) that will be a core piece that is a little shorter in case the upper stage does not have appropriate tolerances. Note that this design still works if play and friction can be reduced enough but it is not as polished as i would like.

This design is very complex and would greatly benefit from the abilities of 3D printing. the main driving concept in this model is the small feet like features on rings 1 and 2. much like Vibrots or the kids toy Hexbugs these feet act like springs that use vibrations to produce motion in the rings. 

in my tests so far i have been able to get them to spin pretty fast but reducing friction in the system and decreasing play is the key to getting this to work. for this reasons ive found that printing the parts out of different materials works best. i only have access to an ender 3 so my quality is very limited. (hopefully Joel's accesses to professional machines will avoid a lot of the stringing issues i had) 

here is a list of my thoughts of what materials work best:

Main base, spacers, stage 2 base, washer need to be rigid to transfer the vibrations to the rings. for this reason I think something like ABS or PLA would be best. I'm not to familiar with resin but the smoother finish would help reduce friction for the feet to bounce so this might be the preferred method. 

the two rings are a bit tricky. the feet need to be relatively springy but the rings need to be rigid so they don't flex and absorb vibrations. something like PETG should work. the feet do love to make strings though so maybe a form of springy resin would be best for these. perhaps multi-material would also work like using abs for the ring and semi-flex for the feet. 

the assembly is currently held together with an M5 bolt which threads into the central core with help from the washer. 

this thing looks pretty cool when it turns. I'm still improving it and am open to any suggestions. this iteration only uses a one bolt but i do think that the design would benefit the use of bearings and steel rods to reduce friction. although I'm not sure if something with that much hardware would still qualify for the contest

i am working on getting a video together about proof of concept and an assembly animation, which i will link soon. 

lastly i will continue to upload cosmetically different forms of the ring but will all be interchangeable to make a completely unique assembly 

Vibro-Ring Speaker cover for #3DPNSpeakerCover

the main piece that screws to the speaker. the tighter the better the more vibrations form the speaker this part transfers the easier the rings turn 

main base.stl

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