Hey mate. Awesome stuff going on here! Really loving where you're going! I saw another comment mentioning spiders for centering, and how you mentioned it blocking airflow. Whilst true, the fan design does allow for some decent static pressure (due to there being 5 blades), nonetheless, you could always try 3D printing the spider out of TPU, that way you could design it to be mostly hollow whilst keeping the voice coil centered. Another thing you might want to consider is whether you are going to design it to play vertically or horizontally, due to the weight of the assembly this could very much alter how you choose to design your spider.
Maybe springs would would be a Better Idea here or even rubber/ Elastic bands tensioned evenly. The next would be simply to use a high tolerance air bearing cylindrical so that there is little friction as possible on the "Yoke" portion of the coil. Robot Underground is pretty busy these days, but I bet he could help out a bit since he's pretty much a closeted genius / Engineer that moonlights as a Subwoofer builder & comedian. Also , Audio Science Review has some Bonafied engineers on the forum along with DIY Audio. Might be a good place for advice. Love the work that you do. Please soon put up something like a Pay pal link so that we can donate so you are not out of pocket. Again, IMPRESSED!!!!! @@nathanbulle5782
glad you made another video on these things! i want to see more since im trying to build my own. what motor would you recommend i buy for this project?
@@nathanbulle5782 thanks for the recommendation. I've chosen a CNC motor since it can spin at pretty high speeds which i heard was needed for the rotary sub to hit high frequencies like 30hz, and its still quite powerful (the unit im getting is rated at 500w), so it seems like the perfect match to me. Thanks again for the attention, cant wait for the next video on this kind of transducer
Wait, is the rotor being pulled away from the stator when it moves? I just want to mention that the strength of the motor is reduced when the magnets of the rotor are not completely over the coils of the stator and it may worse the problem that when the blades are at an angle they experience more drag so now there is more drag and less force from the motor
Rotary midrange and and tweeter next? lol nice. I dont really see it going far for cars, all the exposure to dirt/dust/moisture and etc would be pretty hard on them.
Hi, would you be willing to share the files? I am very interested in making one of these and so far this this is the only one that looks practical. also what cad software do you use?
This one doesn't work that well it needs a few improvements (like more movement space for the blades towards the motor side) but if you give me your email I'll send you the files
New video on miniaturizing a rotary sub and squeezing it inside a regular sized Bluetooth speaker! Does this work? Click to find out! th-cam.com/video/clqtJay-d14/w-d-xo.html
Hey mate. Awesome stuff going on here! Really loving where you're going!
I saw another comment mentioning spiders for centering, and how you mentioned it blocking airflow. Whilst true, the fan design does allow for some decent static pressure (due to there being 5 blades), nonetheless, you could always try 3D printing the spider out of TPU, that way you could design it to be mostly hollow whilst keeping the voice coil centered.
Another thing you might want to consider is whether you are going to design it to play vertically or horizontally, due to the weight of the assembly this could very much alter how you choose to design your spider.
I think you need a "spider" or two, to keep the actuator centred properly
I agree. It's difficult to use a spider in this format without blocking airflow though
@@nathanbulle5782 Makes me wonder if they make mesh spiders
@@Retr0id no but they do make fuzzy ones
Maybe springs would would be a Better Idea here or even rubber/ Elastic bands tensioned evenly. The next would be simply to use a high tolerance air bearing cylindrical so that there is little friction as possible on the "Yoke" portion of the coil.
Robot Underground is pretty busy these days, but I bet he could help out a bit since he's pretty much a closeted genius / Engineer that moonlights as a Subwoofer builder & comedian.
Also , Audio Science Review has some Bonafied engineers on the forum along with DIY Audio.
Might be a good place for advice. Love the work that you do.
Please soon put up something like a Pay pal link so that we can donate so you are not out of pocket.
Again, IMPRESSED!!!!!
@@nathanbulle5782
Poisonous ones freak me out 😵🕷️
glad you made another video on these things! i want to see more since im trying to build my own. what motor would you recommend i buy for this project?
Go to the junkyard and buy a motor from a radiator cooling fan. They cost $10-$20 usually and run on 12V at the perfect speed
There's going to be a 3rd video on rotary subs and possibly a 4th.
@@nathanbulle5782 thanks for the recommendation. I've chosen a CNC motor since it can spin at pretty high speeds which i heard was needed for the rotary sub to hit high frequencies like 30hz, and its still quite powerful (the unit im getting is rated at 500w), so it seems like the perfect match to me. Thanks again for the attention, cant wait for the next video on this kind of transducer
@@FPSzky your welcome. As a piece of advice, you can use the motor to drill itself if your trying to make a hole in the center of the shaft
consider eye protection pls
More like hearing protection lol
Wait, is the rotor being pulled away from the stator when it moves? I just want to mention that the strength of the motor is reduced when the magnets of the rotor are not completely over the coils of the stator and it may worse the problem that when the blades are at an angle they experience more drag so now there is more drag and less force from the motor
Can you share the 3d model?
Rotary midrange and and tweeter next? lol nice. I dont really see it going far for cars, all the exposure to dirt/dust/moisture and etc would be pretty hard on them.
They'll blow all that junk away:)
good job bro,now your next subject,a big one or a double baffle in your window shaking the house at 1 and 2 hz haha i love this stuff
That's ones coming
How much for you to build me one of these? Without shipping included for simplicity's sake
Hi, would you be willing to share the files? I am very interested in making one of these and so far this this is the only one that looks practical. also what cad software do you use?
This one doesn't work that well it needs a few improvements (like more movement space for the blades towards the motor side) but if you give me your email I'll send you the files
Solidworks
That's neat
What’s a spider I don’t understand?? Everyone’s saying use a spider
It's a tensile round flat piece of firm fabric that has ridges and allows the center to stretch in and out without deformation
@@nathanbulle5782 oh the brown rubber thing that’s wavy? Looked it up and yes I’ve seen that before never knew it’s name tho thank you
@@YHK_YT yes
New video on miniaturizing a rotary sub and squeezing it inside a regular sized Bluetooth speaker! Does this work? Click to find out!
th-cam.com/video/clqtJay-d14/w-d-xo.html