Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 17, 2022 17:53:34 GMT -5
I have been trying so hard to get something accomplished on this project If I were 2 years younger it would be testing stuff already About to turn 65 and working 2 jobs is actually starting to become difficult for me This week is looking very good with lots of time, but the temperature is going to be quite low for the next week without any heat in my shop Trying to get something started soon
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,341
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Post by quartz on Jan 17, 2022 22:39:38 GMT -5
Good things take time, and from the looks of it you started several people going on something similar. It's going to be interesting to see what comes of it all.
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jamesp
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Member since October 2012
Posts: 36,158
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Post by jamesp on Jan 18, 2022 9:05:59 GMT -5
I have been trying so hard to get something accomplished on this project If I were 2 years younger it would be testing stuff already About to turn 65 and working 2 jobs is actually starting to become difficult for me This week is looking very good with lots of time, but the temperature is going to be quite low for the next week without any heat in my shop Trying to get something started soon
I'm pumped to see what you come up with. Like quartz said, time is no issue. Ha, wife just finished signing me up for medicare. Turning 65 on Feb 7. When is your BDay ? No need to be in a hurry. Especially working so much. Back to burning the candle from one end lol. PS Open enrollment for Medicare - don't forget is 3 months before 65th. If you miss the time frame you may be vulnerable to underwriter's investigation. Don't go there. The more I look at bass shakers applications on Youtube the more they seem to be fully capable to use on a vibe tumbler. Wouldn't surprise if a single 50 watt unit would vibrate a 10 to 20 pound hopper full of rocks if design is right.
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Post by Rockoonz on Jan 18, 2022 11:21:17 GMT -5
jamesp my 65th is July, I stumbled on a veterans event in a park after leaving a gun show and met an advisor who has become a friend. I was pretty concerned about all the choices before that.
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rewdownunder
spending too much on rocks
Member since March 2012
Posts: 357
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Post by rewdownunder on Jan 18, 2022 11:33:42 GMT -5
I am reading this with great interest as I have about 10 old waterbed vibration units and controls in the garage that I got when a store went under about 20 years ago. They operate on 110 volts and can move 100s of pounds of water from a gentle wave to tsunami. I was always thinking I could use them to drive a large flat lap but never got around to building one.
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 18, 2022 19:48:41 GMT -5
I have been trying so hard to get something accomplished on this project If I were 2 years younger it would be testing stuff already About to turn 65 and working 2 jobs is actually starting to become difficult for me This week is looking very good with lots of time, but the temperature is going to be quite low for the next week without any heat in my shop Trying to get something started soon
I'm pumped to see what you come up with. Like quartz said, time is no issue. Ha, wife just finished signing me up for medicare. Turning 65 on Feb 7. When is your BDay ? I have a firm direction I am taking with the Bass Shaker. That is the first thing I will be working on. Took a picture of my idea and have already changed to another plan, so will need to take another picture. Signed up for Medicare last week, took an hour and a half on the phone. I really need to get a Hernia fixed.
I will turn 65 on April 12 - 2022
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 24, 2022 18:08:43 GMT -5
I've finally got a day off and it was 60 degrees outside, so I got something started on my Woofer Vibe project. This is the speaker that I started with, a 15 inch subwoofer speaker rated about 125 watts with a 2 inch Voice Coil. It will eventually be epoxy glued together, but is sitting together using gravity to get these pics. I cut out then speaker Cone to reduce air resistance and and reduce the volume as much as possible, you can see the old cone in the background. Decided to make the Spring Mechanism out of some 1/8 inch Plexiglass cut thinly and bolted to the speaker frame. I think the spring is too stiff right now and will cut the Arms down to half their width before finishing. Used a Dog food can to connect the voice coil with the plexispring. This can will soon have a Bolt through the middle of it to hold my Hoppers full of rocks. There are holes drilled in the can to help air escape from being repeatedly compressed/expanded inside. I will glue the can down to the voice coil, then I will weigh down the spring with about 5 pounds so the spring will be taking most of the weight during the tumble, then glue that to the top of the can. I get another Day Off soon and will try and get it testable ? My thinking on the Butt kickers is to glue some kind of hardware to the top of the magnet. then drill a hole in the Top Plate, then put it all back together. Then mount it to the bottom of an old Speaker Basket without the magnet, Then Finish it out much the same as the Woofer Speaker with a Plexy spring and have the hardware connect directly to the Hopper and rocks. Finally getting stuff done . . .
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stewdogg
spending too much on rocks
Member since January 2020
Posts: 388
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Post by stewdogg on Jan 25, 2022 10:01:15 GMT -5
This is awesome, thanks for taking us on the journey!
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jamesp
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Member since October 2012
Posts: 36,158
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Post by jamesp on Jan 26, 2022 10:17:58 GMT -5
Rockoonz WooferhoundMy insurance agent helped me wade thru the Medicare choices. But he said I have to do deal with doing the Medicare application process myself and I found it easy. He did warn me to get it done during the enrollment period. If you are late it may leave you vulnerable to being under underwriter scrutiny and that can be a problem. Watching your project with great anticipation Tim.
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 26, 2022 11:09:17 GMT -5
Amazingly I have another day off today and plan to get a lot more done ... -- Cutting down the Plexiglass arms to thin them out and make it all more flexible. -- Putting hardware onto the center Can that will connect to the Rock Hopper which will probably be a PVC pipe endcap. -- Using Epoxy glue to glue the Voicecoil/Can and the Can/Plexispring Then it will be time to connect some audio power to it all and see if it will Shake it up Baby.
When I started out looking for something to connect the Voicecoil to the plexispring, I realized that using metal was going to be a problem because it was attracted to the magnet. Even if the metal was Aluminum, there would be Magnetic Breaking which would drain energy reducing efficiency. This is one of the reasons why I am using a can to connect the vibration to a flexible surface that can hold different rock hoppers. The open end of the can will be connected to the voicecoil, which is keeping the vibrating metal away from the magnet. Also thought about using PVC pipe for this purpose.
Just waiting on things to warm up a bit before I get started . . .
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jamesp
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Member since October 2012
Posts: 36,158
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Post by jamesp on Jan 26, 2022 13:05:18 GMT -5
Check it out Wooferhound. Vibrates the 3 pound shaker effortlessly. A bit concerned about heat build up at higher volumes. 30% volume on one channel of a Sony 190 watt amp playing Wanted Dead or Alive using one of the 25 watt bass shakers. Vibration response and control is above and beyond call of duty IMO. Ability to control waveform type/strength/parameters to a given load of rocks/slurry will be a game changer.
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 26, 2022 14:57:40 GMT -5
I've gotten a lot of the modifications done already and will start gluing things together soon. Looks like testing as soon as tomorrow night I hope. Then I will start making something with the Butt Kicker that Jamesp sent me.
Remember that I have another 15 inch woofer I intend to sacrifice after I see what this current experiment will do. So if anybody has any ideas about how to make improvements , please feel free so make suggestions before I build the next one.
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 26, 2022 16:31:44 GMT -5
Here it is , sitting for the night , freshly glued with 5 minute epoxy Gorilla glue. There is a 3 pound barrel on top with about the number of rocks that this should tumble. It is Preloading the Plexispring to prevent the Voicecoil from Bottoming Out under the rock load. If you have ever used 5 Minute Epoxy, then you would know not to touch it for 12 hours or more, so I get to take the barrel off and get a peek at it tomorrow. Still several more days before Vibing some rocks . . .
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jamesp
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Member since October 2012
Posts: 36,158
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Post by jamesp on Jan 27, 2022 0:39:22 GMT -5
Cool suspension design Tim. You were even utilized the speaker frame as it was originally used.
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 27, 2022 8:45:05 GMT -5
Cool suspension design Tim. You were even utilized the speaker frame as it was originally used. That is the best part about building with a Subwoofer.
It already has a Frame with 8 Bolt Holes.
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jamesp
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Member since October 2012
Posts: 36,158
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Post by jamesp on Jan 27, 2022 9:29:35 GMT -5
Cool suspension design Tim. You were even utilized the speaker frame as it was originally used. That is the best part about building with a Subwoofer.
It already has a Frame with 8 Bolt Holes.
Yes that speaker frame made a perfect structure to work with. question If the hopper was mounted just off-center on the cross shaped support would it help to give the stones a rolling motion ? Perhaps cut the 'bullseye' in the center of the PVC cross support large enough to mount the hopper off-center in an optimum location for offset rolling motion of the rocks ? To improve mixing...
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 27, 2022 19:45:42 GMT -5
That is the best part about building with a Subwoofer.
It already has a Frame with 8 Bolt Holes.
Yes that speaker frame made a perfect structure to work with. question If the hopper was mounted just off-center on the cross shaped support would it help to give the stones a rolling motion ? Perhaps cut the 'bullseye' in the center of the PVC cross support large enough to mount the hopper off-center in an optimum location for offset rolling motion of the rocks ? To improve mixing... Here is the finished tumbler without the Rock Hopper. The two 10-32 machine screws are super tightened and glued. This is a Prototype in the true meaning, it is all glued together without much chance of modification. A pathfinder leading the way to a more researched/modifiable/Repairable version to be built soon. I intend to start out mounting the Hopper in the center to see what the action will be without any attempt to create a rolling motion. It is possible that just tilting the whole thing will make rolling motion? Then I have plenty of ideas to try and make it all roll, plus all of the Forums ideas too. One initial problem is that I have never done Vibe Tumbling, but I have seen it on TV. Seen enough videos to know that it is hypnotic when it's tumbling correctly. At this time I don't have anything that I can use as a Rock Hopper. Thought I had a couple of 6 inch PVC Endcaps but can't find any, So will purchase some soon, kinda pricy but seems like it would work well. I applied the last glue needed this morning and it was hardened very well when I got off work, so some testing was done ahead of schedule. Hooked up a 6.3 volt AC Transformer to the speaker which will give the speaker 60 hz at about 8 watts. It works very Good and is not as loud as I thought it was going to be. I placed a Baggie full of rocks on top and they settled out instantly and some small rocks were crawling around on top of the pile. The rocks rattling around was louder than the Machine was. I think this will eventually work Quite Well. Bass speakers for cars are cheap and powerful, can be purchased for $40 to $50 that are good enough to make a vibe from.
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jamesp
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Member since October 2012
Posts: 36,158
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Post by jamesp on Jan 28, 2022 4:43:26 GMT -5
A fine prototype Wooferhound. Done on a budget and will tell you a great deal. No magic to a vibe since it is just a container being shaken at a fairly high rate. The geometry might be the biggest challenge. You can adjust the frequency and amplitude of the vibration, the rest is downhill. This approach is long overdue for a smaller vibe and is so much more mechanically simple than using a counterweighted motor for a source.
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 28, 2022 5:48:45 GMT -5
There is a type of Sub Bass speaker that has the cones driven by Servo Motors That would be another method to consider ?
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jamesp
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Member since October 2012
Posts: 36,158
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Post by jamesp on Jan 28, 2022 11:14:49 GMT -5
There is a type of Sub Bass speaker that has the cones driven by Servo Motors That would be another method to consider ?
Interesting. New ECM (electronically commutated motors)such as those used on drones and many applications are capable of high response capability. Curious how they work. The simplicity and controllability of a speaker coil is attractive. They come in all sizes and power capabilities and have been around forever and there is no shortage of applicable controllers. Helps to have a good sound man to figure out the controls !
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