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Gold Prospecting Forums - General => Do It Yourself Projects => Topic started by: shiver on April 12, 2007, 10:03:56 PM

Title: Shaker Table Plans
Post by: shiver on April 12, 2007, 10:03:56 PM
Shaker Table Plans PDF

attached below
Title: Re: Shaker Table Plans
Post by: Steppegold on May 29, 2007, 08:51:59 PM
Shiver - here is the same one when we made it last year:
(http://i30.photobucket.com/albums/c331/crestednewt/BGS%20table/P1010040small.jpg)
I call it the BGS over-the-shoulder hand-cranked shaking table.
Its a cool machine.

Steppe
Title: Re: Shaker Table Plans
Post by: Steppegold on May 29, 2007, 08:54:18 PM
Here are a couple more views to help make sense of the download:
(http://i30.photobucket.com/albums/c331/crestednewt/BGS%20table/P1010042small.jpg)

(http://i30.photobucket.com/albums/c331/crestednewt/BGS%20table/P1010037small.jpg)

Steppe
Title: Re: Shaker Table Plans
Post by: Steppegold on May 29, 2007, 08:58:37 PM
The clever bit is the bicycle parts that allow you to turn the handle at a leisurely pace but rock and roll the table MUCH faster:
(http://i30.photobucket.com/albums/c331/crestednewt/BGS%20table/P1010033small.jpg)

Here is my daughter Mandy showing how to do it....
(http://i30.photobucket.com/albums/c331/crestednewt/BGS%20table/P1010017-1.jpg)

Its a worthwhile project and the BGS tested it and found it recovered fine gold rather better than a Wilfley Table.

cheers

Steppe
Title: Re: Shaker Table Plans
Post by: Tricky on June 27, 2008, 05:18:03 PM
Obviously due to the age of the topic the link has dropped out as it reports and error for the link to the plans
Title: Re: Shaker Table Plans
Post by: shiver on June 27, 2008, 08:40:45 PM
I found a copy I had downloaded back then, its attached up on the first post.  <-good_>
Title: Re: Shaker Table Plans
Post by: sillyelk1 on November 05, 2008, 10:19:50 AM
Hey Steppegold, I downloaded the pdf but there are no actual plans for building it. Just wondering if you had plans for the one you built.
Title: Re: Shaker Table Plans
Post by: ruralcandles on November 27, 2008, 09:43:35 PM
Hey Steppegold, I downloaded the pdf but there are no actual plans for building it. Just wondering if you had plans for the one you built.
Would be a very good idea as it looks like it would be fairly simple to make  and looks as though it would work great as well.
Title: Re: Shaker Table Plans
Post by: VikingSniper on December 07, 2008, 10:10:44 PM
I found this I hope it will help with the shaker table plans.
Title: Re: Shaker Table Plans
Post by: pasty on December 29, 2008, 04:02:49 PM
1. how is the arm attached to the TABLE?
2.What dose the arm look Like?
3How is the rubber Band that is used for theKNOCK attached?
I would like to make one, but with only part of the plans ???
dose any one out there know how it's put together. Thanks Pasty
Title: Re: Shaker Table Plans
Post by: ABEARZZ on January 08, 2009, 12:48:15 PM
looks easy to build and would not be hard to operate with a 12v wiper motor...hmmmmm
Title: Re: Shaker Table Plans
Post by: pasty on January 29, 2009, 07:22:38 AM
Hey Steppegold, I downloaded the pdf but there are no actual plans for building it. Just wondering if you had plans for the one you built.
Title: Re: Shaker Table Plans
Post by: P_Carroll on January 29, 2009, 01:13:55 PM
I have emailed the BGS abput the shaker tabel and they told me the man who was the main author fo the report is out of the country until next week but my email has been forewarded to him and he will respond when he gets back so hopefully I can have dimensioned drawings I can post. On the report it says one fifth scale so if you print it up on standard paper you could theoretically enlarge it to obtain the right dimensions. The riffle size and angles are lacking though so Im hoping I can get a better set of drawings.
Title: Re: Shaker Table Plans
Post by: Chuxgold on January 31, 2009, 07:10:07 AM
You know you can use a boat trailer winch for driving things that take lots of torque and are turned by hand. Fun looking and productive project.
Chuck.
Title: Re: Shaker Table Plans
Post by: Todd on February 19, 2009, 10:04:47 AM
Hey guys,

just checking to see if anyone was able to track down the detailed drawings of the shaker table.  Have started building the deck but not sure what the deck sits on.  Since the deck has to jig back and forth I am not sure if it sit on rails or rubber blocks???. 

Todd
Title: Re: Shaker Table Plans
Post by: GollyMrScience on February 19, 2009, 11:18:09 AM
For something this tiny a couple of caster wheels bolted to the base and channel iron tracks to the bottom of the table would do the trick just fine. You can do the reverse - wheels bolted to the table top and tracks on the base but the tracks will get gummed up with crud and sand and such in that configuration so better to have the tracks on the table top and the castor wheels bolted to the base acting as legs for the table keeping the wheels up off the base and shielded by the rails so they don't get gummed up.
Title: Re: Shaker Table Plans
Post by: P_Carroll on February 25, 2009, 03:06:14 PM
I finally heard back from the BGS. No such plans ever existed. You are going to have to go by the drawing in the report which is 1/5 scale and move foreward from there.
Sorry.


Hey guys,

just checking to see if anyone was able to track down the detailed drawings of the shaker table.  Have started building the deck but not sure what the deck sits on.  Since the deck has to jig back and forth I am not sure if it sit on rails or rubber blocks???. 

Todd
Title: Re: Shaker Table Plans
Post by: GollyMrScience on February 25, 2009, 11:13:11 PM
Maybe we can get steppegold to post more details.

I am not real big on a hand crank unit but driven by electric would work.

Having a simple pitman arm is not gonna cut it. You need to introduce a bias to the action so material moves in the direction you want it to down the table. If all you had was the offset cam with an arm on it it will shake the table but not move the material properly. Many commercial units use a bumper or a flex spring to either bump the table at the end or shove it away faster than it got pushed against the spring.

You could also completely eliminate tracks underneath and combime table top support with the carrier by using flexible support like the Geminii Table. The table top is supported by two legs of puck board. They are wide plates going crossways in the middle of the table - one near the front and one near the end. The geminii is a bumper table AND it has a spring shock absorber  to smooth the action out. The bigger commercial tables I have worked with i the past eliminated legs and table supports from below and hung the tables from cable from the roof.

I have also seen the legs supporting the table top made out of strips of steel that will allow flex for the table to move.

On a small scale the tracks and casters will work.

We could reverse engineer this thing if people are really interested but I dont have time to play with the evolving design that someone will have to build to ensure we get it right.

One of the simplest designs for a home made unit like this is to mount a small electric motor direct coupled to a shiv pulley at the head end of the table. A weight is put on the pulley such that it creates the back and forth motion of the table as it turns. The offset weight being moveable the amount of action will be controlled by the speed of the motor, weight of the weight and weight position relative to the centre of the pulley. the further out it is the longer the throw.

The entire electric motor and pulley assembly can move with the table as the motion is quite short and a slight bit of slack in the electric cord is all you need for it to keep up.  A simple bumper at the end will create the directional bias you need. Some guys frown on bumper tables as operators can get a bit ham handed with them creating too much bump and lifting heavies off the table high enough that they get moved too far down towards the tails. A shock absorbing spring will generally take care of it and create the throw you want for bias direction.
Title: Re: Shaker Table Plans
Post by: Todd on February 27, 2009, 05:35:03 PM
I have started putting the deck/riffles together.  Since their are no plans I have just scaled up from the drawings.  In addition I have a buddy who has a large scale Wifley table.  He has provided me with some photos and dimensions.  Photos from his table show that it is mounted on several bars/rails. 
He also mentioned the jigging motion that is being discusses and how important it is.  So I will get the deck built and try out some different ideas.  I do like the idea of the hand crank and portability of this machine.   

I will post pictures here if someone could advise me how to attach pictures etc.

Also, would anyone have any experience with stamp mills, for crushing qtz veins.   

Todd
Title: Re: Shaker Table Plans
Post by: shiver on February 27, 2009, 06:18:53 PM
Some photo's of your project would be great Todd!  <-good_>

Follow this link for image posting instructions....  Posting images (http://gpex.ca/smf/index.php?topic=25.msg43#msg43)
Title: Re: Shaker Table Plans
Post by: auhunter on February 27, 2009, 10:56:29 PM

Also, would anyone have any experience with stamp mills, for crushing qtz veins.   


 {-down-}
Electrified 1-Stamp Mill (http://gpex.ca/smf/index.php?topic=1790.0)
Title: Re: Shaker Table Plans
Post by: GoldFever on February 28, 2009, 03:16:36 PM
Also, would anyone have any experience with stamp mills, for crushing qtz veins.   

That would be great if you could Todd, I would like to see some more shots of it before I tackle this project.

Thanks in advance <-good_>
Title: Re: Shaker Table Plans
Post by: pasty on April 25, 2009, 03:21:48 PM
Hi, I started to make the shaker table, and I was going to use  A good set of sliders that is used on drawers . They have good bearings to roll on. I was going use a sewing machine motor, the speed can be control-ed , the only thing is the Rubber band, and how is it connected to produce a Knock??   Pasty
Title: Re: Shaker Table Plans
Post by: GollyMrScience on April 25, 2009, 04:45:38 PM
I will have to take a real close look at the shaker table you are trying to duplicate but generally the rubber band would serve as a spring to actially pull the table back against a bumper after the motor with a cam or some such pulls it away.
The idea is that the spring works faster than the motor to snap the table back quickly.
Be very careful choosing what to use for sliders as the dirt and grunge will really take its toll on wimpy units.
Title: Re: Shaker Table Plans
Post by: Todd on April 26, 2009, 03:29:31 PM
Hey Golly,

Am in the construction phase of the table.  Have the deck with riffles built and the bearings and chains etc all ready to go.  Was considering mounting the deck on sliders for kitchen cupboard drawers, they slide well, but figured the water and sand would gum up.  After couple other ideas have decided to try wooden guides with hard plastic / teflon sliders, simple to start with and easy to clean and maintain. 
 
The next thought is the adjustment on the knock around 4mm to 1 cm.   I want this to be adjustable for fine tuning the operatiion when recovering fine gold. 
Mayby have it all together in a couple of weeks if I get enough time.
 
Todd 
Title: Re: Shaker Table Plans
Post by: GollyMrScience on April 26, 2009, 05:25:14 PM
Todd you might consider using just two flat pieces of fairly thin "Puckboard" as both the support and the mechanism for movement.
Pieces are used like legs down from the table to the frame. Not sure on the size of your table but the pieces are oriented so they are wider across the table . As the table moves the legs bend with the table.
Many table designs use this system including the eutec, silver springs and gemini.
Very simple and bulletproof. Can't clog or jam.
Many tables have a fixed throw in that the table will move away from the bumper the same distance every time because of the mechanical setup but then the bumper is a rubber pad on a threaded rod that can be screwed in and out to intercept the table as the rubber band pulls it back. This will in effect shoren the throw and the period of the throw to some degree.

I have a Eutec table here for some fixing up. The Eutec uses two flat thin steel plates as legs to get the same flex that puckboard does. Remind me and I will try to take a pic to show you the legs. Of course the commercial tables are much more than the legs so each has its own way of controlling all the variables but the legs are simple and if they would work for you will save you a lot of hassles. The flat plate puckboard plastic or steel flex plate legs is nothing new or special but it works great.
Title: Re: Shaker Table Plans
Post by: pasty on July 05, 2009, 02:03:17 PM
HOLD IT Guys, This table is used for cleanup only. Your big stuff is not put on the table ,only the Fines. So I think this table is used at home where you can use a Dimmer switch to control a small Electric motor to run the shaker. The thing is this table is so simple to make, that a person can't see the trees for the forest ( this is my trouble ).
           Pasty
Title: Re: Shaker Table Plans
Post by: GollyMrScience on November 10, 2012, 02:36:52 PM
I am hauling this thread out of mothballs as Geo2 asked some questions about it in another recent thread and it really does deserve some attention.

We had a couple of people saying they were working on building one but I never did see reports back. Did anyone ever finish a table of this design off?
I am not real big on hand crank designs for tables because of the difficulty in keeping the action consistent. The real strength of tables is that they are consistent so as you make adjustments you don't have other variables changing. Table speed being a big one especially if that is tied to the throw and force imparted if using a bumper.
Nevertheless, if faced with nothing else available hand crank it is but I would be working real hard to whittle me a little electric motor! <-laugh->
Even a small 12V running off a battery would run a table this small. Besides you need to get water to it in a consistent manner too and while it can be done with a pail feeding a holding tank set higher than the table that would get real tiresome in short order.

The questions Geo2 asked were:
"I ask about the BGS hand cranked shaker table - I know this is not the right topic to post, but forgive me, I am just trying to benefit from the experts here  - I read the other topic discussing it bu some concepts aren't clear to me. Take for example the suspension system or using roller caster wheels. I just can't get it .Any chances of clarification lessons here"

So the suspension system plays such an important part in the action that it should be given some careful consideration. Off the top of my head I can remember looking at suspension systems using rollers or wheels running in or on tracks, cable hung, on swivel arms,  on slider bearings, on simple open ball bearing races, on flexible "legs" made out of plastic, metal and in one design wood. Maybe one or two others too but those are the main ones. On little tables like this one you sure don't need much to do the job just something trouble free is nice.
I talked earlier in this thread about concerns with bearings and tracks getting dirt in them and gumming things up. One thought was to use caster wheels set with the wheels pointing up and fitting into tracks on the bottom of the table made out of channel steel. The 'U" shape of the track facing down and going over the outside of the caster wheels that way dirt cant get caught in the track and the wheels can easily be oiled from the side. You can take that one step further and go for pully type wheels  using the groove and the track is just one side of an angle iron pointing down with the other side bolted to the bottom of the table. Makes like an upside down train track with the grooved pully wheel on the bottom and the table riding back and forth on it with the angle iron track. You could do it the other way around but for some reason I like the wheels on the bottom as its easier to get in and oil or grease them without making a mess.
The legs type have become my favorite in some ways because they are so simple and they cannot get gummed up. The leg is simply fastened with one end at the table and the other on the frame and it flexes just enough to let the table move back and forth. Some designs use actual legs with relatively thin legs at each corner and some use more of a single wide sheet like leg. The one issue with legs is that if the throw is really long. Because the ends are fixed the table can end up doing arcs in its motion as it gets to one side the leg is bending enough to cause that end to dip. Not a big issue though as the length of throw should be short enough that the table is not flexing the leg that much.
The other real big issue is how to impart the shake. Fixed pitman type arm, offset cam driving a bumper wheel, reciprocating linkage, offset weight on a flywheel etc?
Well I've started a book here. Better step back and let some others toss some ideas into the mix.
More later.
Title: Re: Shaker Table Plans
Post by: Goldcrow on November 10, 2012, 02:57:50 PM
I think for cheap/easy build, the leg flex would be best. The flywheel/offset type action would be less tiring & easier to keep a constant speed, once started. I agree with the motor drive, but that may not be an option for our less fortunate compadres.  :)
Title: Re: Shaker Table Plans
Post by: GollyMrScience on November 10, 2012, 10:12:23 PM
I agree Goldcrow the flywheel with weights is a pretty simple system and is easier to run by hand. Its the design that I come back to whenever I am doodling and designing the "perfect" portable mini table.  <-laugh-> Also agree on the legs -  gunge and dirt can't goof them up and they dont need oil or grease plus they never get sticky or need adjusting. The puck board flex sheets/legs on my gemini are over 26 years old and still work fine. The metal sheet/legs on my RP-4 are not as old but can't see them wearing out anytime soon ...like....never. The longer thin strap steel legs on a Silver Springs table are similarly robust but did get bent on shipping  so maybe a bit less bullet proof though that table has been in service for at least 20 years. Matching the right flex to the table will take some experimenting but it ain't that hard.
Title: Re: Shaker Table Plans
Post by: jcazgoldchaser on November 11, 2012, 12:15:28 AM
microcarve's cnc machines use an oilite bushing on stainless shafts.

(http://www.microcarve.com/zone8/slide2.jpg)

Yer only moving a fraction of an inch,.. er under 2 cm so strap some easily flexible rubber (rubber glove fingers) over the shaft to the bearing like a cv joint boot.
Title: Re: Shaker Table Plans
Post by: Geo2 on November 28, 2012, 08:23:20 AM
Nice pic,  jcazgoldchaser. Hmm Gets me thinking <-thinking-> about using an Inkjet printer rail system that's hold the printing medium and some electronics, for a simple very small Angus Mackirk type shaker table.
Title: Re: Shaker Table Plans
Post by: Chad on December 23, 2012, 07:37:43 AM
I am hauling this thread out of mothballs as Geo2 asked some questions about it in another recent thread and it really does deserve some attention.

We had a couple of people saying they were working on building one but I never did see reports back. Did anyone ever finish a table of this design off?
I am not real big on hand crank designs for tables because of the difficulty in keeping the action consistent. The real strength of tables is that they are consistent so as you make adjustments you don't have other variables changing. Table speed being a big one especially if that is tied to the throw and force imparted if using a bumper.
Nevertheless, if faced with nothing else available hand crank it is but I would be working real hard to whittle me a little electric motor! <-laugh->
Even a small 12V running off a battery would run a table this small. Besides you need to get water to it in a consistent manner too and while it can be done with a pail feeding a holding tank set higher than the table that would get real tiresome in short order.

The questions Geo2 asked were:
"I ask about the BGS hand cranked shaker table - I know this is not the right topic to post, but forgive me, I am just trying to benefit from the experts here  - I read the other topic discussing it bu some concepts aren't clear to me. Take for example the suspension system or using roller caster wheels. I just can't get it .Any chances of clarification lessons here"

So the suspension system plays such an important part in the action that it should be given some careful consideration. Off the top of my head I can remember looking at suspension systems using rollers or wheels running in or on tracks, cable hung, on swivel arms,  on slider bearings, on simple open ball bearing races, on flexible "legs" made out of plastic, metal and in one design wood. Maybe one or two others too but those are the main ones. On little tables like this one you sure don't need much to do the job just something trouble free is nice.
I talked earlier in this thread about concerns with bearings and tracks getting dirt in them and gumming things up. One thought was to use caster wheels set with the wheels pointing up and fitting into tracks on the bottom of the table made out of channel steel. The 'U" shape of the track facing down and going over the outside of the caster wheels that way dirt cant get caught in the track and the wheels can easily be oiled from the side. You can take that one step further and go for pully type wheels  using the groove and the track is just one side of an angle iron pointing down with the other side bolted to the bottom of the table. Makes like an upside down train track with the grooved pully wheel on the bottom and the table riding back and forth on it with the angle iron track. You could do it the other way around but for some reason I like the wheels on the bottom as its easier to get in and oil or grease them without making a mess.
The legs type have become my favorite in some ways because they are so simple and they cannot get gummed up. The leg is simply fastened with one end at the table and the other on the frame and it flexes just enough to let the table move back and forth. Some designs use actual legs with relatively thin legs at each corner and some use more of a single wide sheet like leg. The one issue with legs is that if the throw is really long. Because the ends are fixed the table can end up doing arcs in its motion as it gets to one side the leg is bending enough to cause that end to dip. Not a big issue though as the length of throw should be short enough that the table is not flexing the leg that much.
The other real big issue is how to impart the shake. Fixed pitman type arm, offset cam driving a bumper wheel, reciprocating linkage, offset weight on a flywheel etc?
Well I've started a book here. Better step back and let some others toss some ideas into the mix.
More later.

I understand im new here, but not new to prospecting. I have done a lot of research into effective ways to craft a table at a lower cost then purchasing a xtruder/slimes/ or wilfley table. The best information has been clearly in front of us on google. We learn from our history and what works and does not work. Many methods can be used in a proper concentration table, the trick for prospectors is making them portable enough for a one man mission! I am not a physicist/mathematician so my claims on this table are not proven, or tested, However my theory is my theory and Im entitled to my opinion!

If we understand the speed gold falls through water > couldn't we calculate the horizontal distance (shaking distance) needed for proper separation of any mineral of any size?

anyways ... here is the best website I found for table plans

How To Build and Operate Shaker Tables (http://www.scribd.com/doc/43824297/How-To-Build-and-Operate-Shaker-Tables)
Title: Re: Shaker Table Plans
Post by: Geo2 on December 24, 2012, 08:48:35 AM
Hi, I started to make the shaker table, and I was going to use  A good set of sliders that is used on drawers . They have good bearings to roll on. I was going use a sewing machine motor, the speed can be control-ed , the only thing is the Rubber band, and how is it connected to produce a Knock??   Pasty

I tried to post some pics here in this thread but something wrong happened that prevented the completion of it . But luckily shiver solved it, Thanks again Shiver.

Now to the topic again, these pictures are taken from the Technical Report  WC\97\61 titled " The Design, Construction and Testing of A Simple Shaking Table For Gold Recovery: Laboratory Testing and Field Trials" from the British Geological Survey Technical Report  WC\97\61 (http://nora.nerc.ac.uk/8985/1/Shaking_table_for_gold_recovery_WC-97-61.pdf). I have extracted the pics and enlarged them a little bit,so they become clearer to the viewer. If anyone has an Autocad experience may be he/she could help with transforming those pics to blueprint plans easy for use in CNCs and other automated fabrication methods. I really like this idea, so go a head for this one. Enjoy.

Tip: to download the pics use a downloading software to download all the links at once instead of saving them one by one. It is easier and faster, but this depends on you Internet connection speed.


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