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Post by MrP on Nov 30, 2017 5:34:02 GMT -5
You couldn't beat that with a Lotto! Not to sure about that Dave. Let's see how it does with obsidian. The only vibration change would have been the amplitude by WEIGHT and DIMENSIONAL adjustments.(many ways to skin a cat) 1) this assembly is heavier(basic). Added weight is going to numb the amplitude. 2) this assembly holds the hoppers closer to the counterweight shaft in vertical direction and closer to pivot point of rocker plate in horizontal plane. If the hoppers were mounted 6 inches higher(vertical plane) above the rocker plate the amplitude would be much more extreme. Like being in a crow's nest in the rough ocean. (waves rolling against side of boat) Being on the bow of the boat is the shortest amplitude, being 50 feet up in crow's nest you may be swinging 10 feet but same amplitude making a tired sailor. Also, by simply moving the center of the hopper mass closer to the pivot point in the horizontal plane of the rocker plate will decrease amplitude. Like being in the center of the boat verses being along the gunnels.(waves rolling against side of boat) Rocker plate(a boat in the ocean with waves hitting the side of the boat), pair of springs at top of photo, pair of springs at bottom of photo. Note shaft is closer to the top pair of springs, making the bottom pair have more amplitude - the kicker springs. The amplitude is higher on the bottom pair of springs to generate rock rolling action in one direction. Ha, this machine is simple because it is 2 dimensional vibration. The is no Z component like a bowl vibe. Bowls are XYZ dimension vibes.  jamesp I am wondering if because there are two sets of counterweights vs one set in the center on the Rockette is the reason the large rocks move to one side in the Vibrasonic.
The piece of Pet Wood is just to the left of the 5.5" slab. The slab and wood have stayed in the center most of the time. In the Vibrasonic I have always had a problem with slabs going to the side and staying flat against the side. So far I am liking the Rockette just wish it wasn't so loud..................................MrP
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Post by MrP on Nov 29, 2017 16:28:36 GMT -5
about 2 weeks ago I picked up the Rockette 800 I referenced earlier and looks identical to the one in your picture. My guess on capacity is somewhere betweena 15 and a 20 pound load. Need to pick up some rubber shoes for the legs, probably the chair leg slip-ons. The cushion material between the hopper and the hopper frame looks old and may need to be replaced. It has a liner so just need to get some rocks ready to test with. It's a heavy son of a gun. I saw the counterweight on the shaft, not sure how to adjust. Suppose trial and error will do. Just a warning: don't put any rocks with a sharp edge in it with the liner you have. I tumble slabs right off of the saw with all of my tumblers so I made a new liner out of rubber roofing. I ran tumbled rocks in it just to see what it would do and it did a great job. The next run I used all smalls and threw in a couple of 7" Brazilian Agate slabs. Sometime in the run the slab caught the liner and tore it. Sure was glad I had the one made in at that time. The roofing liner does work because have used one after that and it did fine. Wish I could find a place to get original liners some place..................................MrP |
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Post by MrP on Nov 29, 2017 13:39:03 GMT -5
jamesp I think the 800 is .8 cubic foot. The counterweights adjust the same as the Vibrasonic. Ther is no reason for you to not make one of these for yourself. Just make a frame to hang it on with stiff springs. It would be a marvel to own an original. I lack confidence in making a vibe. It is sure on my bucket list. Messing with the Vibrasonic and learning the best vibration scheme for the time being. That hanging design makes a whole bunch more sense. Could not care less if it makes the machine large. No concern there. Like that Rockette. Did you repaint that one or is that the original paint ? The picture is one I found on the Internet while I was researching my machine. Mine doesn't look that good but is not too bad. I have tried searching a number of times and can't find any info, other then the patent, on this unit. I would like to find a source for the rubber liners but no luck...........MrP
ETA I had a photo of mine but PB ate it. The only place I posted was RTH so of course all photos are gone.
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Post by MrP on Nov 29, 2017 10:24:15 GMT -5
jamesp I think the 800 is .8 cubic foot. The counterweights adjust the same as the Vibrasonic. Ther is no reason for you to not make one of these for yourself. Just make a frame to hang it on with stiff springs.
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Post by MrP on Nov 29, 2017 6:19:54 GMT -5
I would agree with Bill, adding weight should not change the frequency. It should change the intensity, more weight will decrease the intensity. If the springs do not keep up you will move into an un-balanced state, you know the old ".... cats and dogs living together" If this discussion moves into the realm of Quantum Physics, I am going for a beer!! The counterbalance can be set from a minimum of 0.1 to a maximum of 1.6 for 14 pounds of rock. Settings above 1.6 for 14 pounds can damage the machine. A gentle setting of 1.1 works great for agate. My intention is a milder setting below .7. Below .7 you see a big slow down. Playing the devil's advocate, if you reduce the counterbalance enough something has to give. Certainly the amplitude, eventually the frequency. -------------------------------------------------------------------------- Sure does appear that settings at .7 or below no longer activate the springs at 3400 vibes per minute. There is not enough counterbalance force to vibrate the 14 pounds at such a speed. Guessing some division of 3400 unless it is unstable vibration. If it is unstable it is a gentle unstable. Gentle instability probably not a problem for tumbling I believe the term that describes this situation is approaching mechanical hysteresis, reduce forces yet further and the lag turns into a slow down. hysteresis 1. the lag in response exhibited by a body in reacting to changes in the forces, especially magnetic forces, affecting it. ------------------ The problem with running the long 13 inch hopper at .7 was separation.
All the big rocks separated to one side, the little rocks and media went to the other side. Rock damage occurred.
Even the slurry went to one side.
Now there are 4 inch wide hoppers. Separation issue greatly reduced.
----------------- The weights I intend to add are small for fine tuning the action. Slide weights on each side of hopper and balanced(or off-balance if it helps action). Instead of making fine adjustments to the counterweights which is a pain. ****Danger - Turn of vibe before approaching.  I finally got my Rockette 800 running. I cannot find liners for the tub that came with it so I made a liner out of roofing material. It did come with a liner but what do I do once it is shot so I had to come up with something. I also made a new tub out of 8" plastic pipe, that is used for underground utilities. The pipe is 9" long with a 6.75 inside diameter. I am running a load of 1-2"+ stones. I threw in a chunk of pet wood that is 5X3X2 and it runs dead center all the time. All rocks seem to run mixed with no separation by size. I like the fact that the tub hangs better then setting on top. The motor is only 1725 RPM and spins the counterweight shaft at 3000 RPM. A new double ended shaft motor for this one is a lot cheaper then the 3600 RPM one. Neither of the Vibe tumblers are quiet but with the new plastic tub on the Rockette it is loud. When I started it with just rocks in it the sound was unbelievable. It was better once a slurry started but still loud.............................MrP |
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Post by MrP on Nov 28, 2017 19:23:34 GMT -5
$100......................MrP
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Post by MrP on Nov 28, 2017 18:22:48 GMT -5
You have had that toy a long time..................................MrP
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Post by MrP on Nov 28, 2017 18:05:39 GMT -5
jamesp And you almost had to be forced into buying it!.................................MrP That Vibrasonic back then ? Yes Nov 2014 ................................MrP |
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Post by MrP on Nov 28, 2017 15:29:59 GMT -5
jamesp JP I would need the base vibration unit and I don't know where to get one cheap enough to make the project worth my time.  The shop you are building give credit to the value of your time. WHEN you finish your shop I hope you will consider such projects. Pulled rocks from Vibraminisonic after 20 hours. So far so good. Ahead of schedule. Means nothing. final polish quality is the target. Keep an eye on Ebay, I bought mine from an unknowing southerner cheap. Grandad's machine, they had no idea what it was worth. And you almost had to be forced into buying it!.................................MrP |
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Post by MrP on Nov 27, 2017 5:31:21 GMT -5
$45...............................MrP
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Post by MrP on Nov 8, 2017 11:05:57 GMT -5
Ok captbob, Jim and everyone else. Here is a link to about 60 pictures I took last night because I hate to disappoint. I just started using flickr so forgive me if I mess up, here is the link. www.flickr.com/photos/152193414@N03/?If that doesn't work then I'm sure one of you will let me know in large font size lolAnd most of it is from With, not all from this past Sunday, I threw in a couple from the Suwannee just for fun. Unfortunately most can fit in the palm of my hand however such beautiful colors and character.You did a great job finding good stuff. Don't be surprised if jamesp asks for tips on finding the best.  ...............................MrP
PS Sorry James had to take the shot!
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Post by MrP on Nov 4, 2017 15:52:58 GMT -5
MrP, my friend has the same vib tumbler as you posted in the picture. Opened it the last time there and it had a liner. It looks to be about a 20 lb capacity barrel It appears I will be adding another machine to my collection. Mine has a liner also but it is not that heavy duty so I don't want to tear it up that is why I am try to figure out something else.....................MrP |
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Post by MrP on Nov 4, 2017 15:50:14 GMT -5
jamesp Set up like a Viking or Thumlers? Already welded this rig up Mike. It is motor ready. 2 inch sheave on the separate counterbalance shaft just like the Vibrasonic. I could put a 6 inch pulley on a 1725 RPM motor and get 3 X 1725 RPM = 5175 RPM at the counterbalance shaft. Would prefer to have a 5000 RPM motor though. I think it would be smoother than doing the up-ratio thru pulleys. This rig may not have stiff enough springs for such a high vibration rate. Would turn the amount of counterbalance way down to just barely out-of-balance for high speed rotation. I temporarily hooked it up to a 1025 RPM motor and it had fine rolling action. It is oversized for easy access to install 'some' motor. Probably needs a redesign for high speed. May just do a vibrating plate type config. Will post if going that way. I guess now that you say that I do remember you saying you were welding it up. Well how about for the next one? ..............................MrP |
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Post by MrP on Nov 4, 2017 15:02:48 GMT -5
jamesp I have one of these but I haven't used it too much because I can't find the rubber liners for it. I tried to make one out of rubber roofing and it did last for a little while but they are a pain to make. It is an aluminum tub so I don't want to use it without a liner. I am going to get Smooth-On because I have used that in a tub I made for the Viking tumbler. Anyway the reason I bring this up is I really like the way it worked. Hanging verse balancing I think is an easier idea because you will not have to find a balance point. When I made my first tub for my Viking I had to move my tub to a point that I didn't think was center but it ended up working better with the tub just a bit more to the back side. Just an idea............................MrP
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Post by MrP on Nov 3, 2017 9:03:24 GMT -5
LOL I saw that about 15 minutes ago and had to leave this site. My response would have probably broken 6 or 7 of the new rules. I came close to that myself that is why I gave you the chance.....................MrP |
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Post by MrP on Nov 3, 2017 8:32:45 GMT -5
Well, it's your job, so swallow your pride, and do the long hours with style. lol Can't wait for captbob to respond...............................MrP |
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Post by MrP on Nov 3, 2017 5:21:54 GMT -5
RAW of other rock  Raw crop  Wow that is a nice rock and beautiful picture. I found out about the difference between RAW and JPEG while I was listing to a podcast about astrophotography. When they are photographing space things are far away so a star they are taking a picture of may only take up 6 or 7 pixels. All of the pixels are very close to the same so in a JPEG they will be stored as 1 pixel but in RAW each pixel will be stored with it's own data. There may be very little difference between each pixel but there is some difference so when they crop, with there special software, they have 6 or 7 pixels to work with instead of only 1 if it was JPEG. 6 or 7 pixels isn't much but is many more then 1.
When taking a picture of your rock in JPEG it would group the fuzzy edges of the plume as 1 because there is really very little difference between those pixels and you don't really need each pixel to make a 'nice' picture. If you were taking the picture for a magazine cover you would want as many pixels as you could have to be able to edit the picture to the best quality.
Believe me I am no expert but the way it was explained seems to make sense to me.......................................MrP
PS: You don't see many pictures from me because most of mine suck!
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Post by MrP on Nov 2, 2017 12:41:52 GMT -5
I just learned this yesterday, that is why I still remember it.
When you take a picture with the RAW setting the data for each and every pixel is stored. In JPEG if pixels surrounding each other have the same basic data they are stored as 1 single pixel. What that means is that in RAW you can edit and change each and every pixel but in JPEG you don't have every pixel therefore you can't do as fine of editing. I think I am good with JPEG.......................MrP |
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Post by MrP on Oct 24, 2017 14:09:02 GMT -5
jakesrocks
Happy Birthday.....................................MrP |
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Post by MrP on Oct 17, 2017 12:08:16 GMT -5
I get most of my supplies from Amazon. You might find items cheaper from other places, but I like the convenience of arm-chair shopping... and I have a "Prime" account. I am not a metal smith, so it restricts me to already produced "Jewelry findings" (that is what you need to look for in your Amazon searches). Many of my gift recipients are 12 years old and younger. I do not want to give them very expensive cab mounts - that they will use and abuse... and loose. For them a cheap mount is just as appreciated as the adults appreciate the sterling silver mounts. I purchased my jewelry making and wire wrapping tools from Amazon also. I bought some beginner books for the Amazon Kindle and followed their advice for what tools were needed. Tela ( rockjunquie ) has a current post dedicated to hand cabbing which you might be interested in: forum.rocktumblinghobby.com/thread/80300/hand-cabbing-info-requestAnd... There is a RTH section dedicated to jewelry making and such (see menu for HOME/Lapidary Discussion Topics) You can find some interesting tutorials below that section: forum.rocktumblinghobby.com/board/33/lapidary-diy-articles-tutorialsThanks for the Info gmitch067 So much to learn and So Much to do and I'm running out of time to do it! I should have started this years ago.  I did. Doesn't matter. Farther behind now then when I started and keep getting farther behind............................MrP |
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...............................MrP
