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#1

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
30 December 2016 04:59 pm

Even though I have a Spiral Wheel I still have problems in separating the black Sand from Fine Gold.

I was about to get started on the Blue Bowl when I looked over to my desk and there was a sad lonely paper / document tray sitting there screaming to be made into a Miller Table. I had a piece of Cutting mat there also and a few backup aquarium pumps lying around.

So I went downstairs and started drilling away, got a couple supplies from Bunnings for a total of $7.00 and away we went.

I had a can of Contact cement sitting there which i used to glue the mat to the tray. Here is the finished product. I did a quick video also to see it in action.

I still need to fit some adjustable legs and drill the holes out a little bit more in the spray bar but all in all it works well for a first attempt.

Here are some pics and a link to video:

1483077482_20161230_121623_resized.jpg
1483077483_20161230_122628_resized.jpg
1483077483_20161230_130304_resized.jpg
1483077484_20161230_163851_resized.jpg
1483077484_20161230_163858_resized.jpg


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

5 users like this post: Tribsa 56, MikeB05, Aggro, AtomRat, AussieChris

#2

7.62marksman
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From: Nowra, NSW
Joined: 26 July 2016
Posts: 3,455
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30 December 2016 05:02 pm

looks good mate well done and works


Highbanker, Sluice, Trommel, Gold Monster 1000 (Khaleesi), M/Lab 16000, Goldseeker 3D 12000, Bounty Hunter "Rustler",
Non Turbo 2.8lt Hilux called Turtle and a NAPFA member ----An ordnance technician at a dead run outranks everybody

#3

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
30 December 2016 05:07 pm

Just noticed when i shut it down the gold has a tendency to pick itself up and start sliding. Any way to avoid that? Thinking of changing the cutting mat over to rubber cupboard lining sheet.

Any thoughts or suggestions?


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

#4

7.62marksman
Member
From: Nowra, NSW
Joined: 26 July 2016
Posts: 3,455
Member
30 December 2016 05:36 pm

what about some fine rubber v matting


Highbanker, Sluice, Trommel, Gold Monster 1000 (Khaleesi), M/Lab 16000, Goldseeker 3D 12000, Bounty Hunter "Rustler",
Non Turbo 2.8lt Hilux called Turtle and a NAPFA member ----An ordnance technician at a dead run outranks everybody

#5

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
30 December 2016 05:43 pm

Yeah I might give that a go. I might use the stuff you gave me.

Here's a pic of that cupboard lining stuff that has a diamond shape in them.

Any opinions on this stuff.

1483080209_20161230_173830_resized.jpg


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

#6

7.62marksman
Member
From: Nowra, NSW
Joined: 26 July 2016
Posts: 3,455
Member
30 December 2016 06:41 pm

not sure about that one and i think the stuff i gave you might be to big of a v in it have a look around for some finer stuff
going back up there tomorrow to finish that hole


Highbanker, Sluice, Trommel, Gold Monster 1000 (Khaleesi), M/Lab 16000, Goldseeker 3D 12000, Bounty Hunter "Rustler",
Non Turbo 2.8lt Hilux called Turtle and a NAPFA member ----An ordnance technician at a dead run outranks everybody

#7

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
01 January 2017 12:18 pm

How did you end up with that hole ? Was it the hole I started or the one under the bridge ?


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

#8

7.62marksman
Member
From: Nowra, NSW
Joined: 26 July 2016
Posts: 3,455
Member
01 January 2017 01:35 pm

the one under the bridge out of the sun
got a small amount not enough to put a photo up going out again in a few days


Highbanker, Sluice, Trommel, Gold Monster 1000 (Khaleesi), M/Lab 16000, Goldseeker 3D 12000, Bounty Hunter "Rustler",
Non Turbo 2.8lt Hilux called Turtle and a NAPFA member ----An ordnance technician at a dead run outranks everybody

#9

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
01 January 2017 01:55 pm

You available to meet up with us there on the 6th or 7th?


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

#10

7.62marksman
Member
From: Nowra, NSW
Joined: 26 July 2016
Posts: 3,455
Member
01 January 2017 02:43 pm

at this stage yes no worries


Highbanker, Sluice, Trommel, Gold Monster 1000 (Khaleesi), M/Lab 16000, Goldseeker 3D 12000, Bounty Hunter "Rustler",
Non Turbo 2.8lt Hilux called Turtle and a NAPFA member ----An ordnance technician at a dead run outranks everybody

#11

hyperscott
Member
From: Central Coast, NSW
Joined: 27 May 2016
Posts: 50
Member
04 January 2017 10:01 pm

Hi Boulders

did you end up finding a good solution for the separating mat?

considering something like this as well at some point.

Regards


Scott - ( HyperScott / Blazesurfer )
Minelab Excalibur | Minelab GoFind 40

#12

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
04 January 2017 10:14 pm

Yet to test it out yet but from what I have learnt is that the angle of the table and the flow of the water is very crucial in getting it to work correctly and has very little forgiveness if one or the other is out slightly.

Classifying the material is also crucial in getting it to work right

I have recovered almost a gram of flour gold that the Spiral wheel just couldn't pick up but I must admit it is pretty time consuming

Last edited by Boulders (04 January 2017 10:15 pm)


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

1 user likes this post: bazxa

#13

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
04 January 2017 10:46 pm

Also if you are planning on making one put the water intake along the back in the middle and then 'T' it off. It will give you more even water pressure along the pipe. Mine seems to have more water flowing from the intake side than the plugged side. I'm going to try and compensate a little by drilling larger holes on the plugged end of the spray bar.


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

#14

bazxa
Member
From: Heathcote, NSW
Joined: 18 March 2016
Posts: 260
Member
05 January 2017 08:05 am

Just a couple of things you could try;
Lightly paper (1200 wet & dry) the document tray until the water flows unbroken across the face
lightly sandpaper the cutting mat surface
change to flat rubber surface
a weir may help resolve uneven flow across the table

Apparently slate is the preferred surface but it is hard to find in a nice flat piece.

I have tried chalk board paint, it works but has 2 issues, it needs the correct substrata or the paint flakes and it is difficult to get a perfectly flat paint surface. Tried vee mat but could only find 2mm stuff, it held too much Haven't tried that stuff used in caravans to stop plates moving.
Blue bowl, you need to rerun several times because there always seems to be very fine gold in its tailings which requires water flow adjustment.

The diamond mat held too much black sand and was hard to get flat when I tried but maybe I was not creative enough.

Be great to see your solution.

Barry

2 users like this post: Occasional_panner, Boulders

#15

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
05 January 2017 08:22 am

Great info there Barry. The cutting mat seems to grip the fine gold pretty well as is.

I'll definitely give it a light sand and see how it goes and make a weir.

Good advice mate. Thanks


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

#16

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
13 January 2017 03:24 pm

So I've added a little mod. Printed out a bracket for a motor mount to vibrate the table. Had an unused RC motor lying around so I hooked it up to the table.

Will post results after I give it a wet run. Here's a couple photos of the motor mounted with an offset weight to create vibration.

Once I do the couple mods that I think it needs and have it running as it should I'll do a proper video on it in operation.

1484281354_20170113_151711_resized.jpg

1484281377_20170113_151718_resized.jpg


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

3 users like this post: AtomRat, Occasional_panner, aussiefarmer

#17

AtomRat
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From: Katazone, VIC
Joined: 22 May 2014
Posts: 5,087
Member
13 January 2017 03:30 pm

Can't wait to see this one big_smile


Wisdom is knowing how little you know

#18

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
13 January 2017 04:11 pm

I gave it a quick squirt. Definitely needs either some grooves up top to hold the Gold or a hole with a catch can underneath to brush the Gold into.

Here's a little dodgy video of the concept. The vibration actually pushes the Gold back up the hill so it has potential.

Also need to play with water flow and get a weir in there for even water distribution.

Still in prototype stage so no editing.

Last edited by Boulders (13 January 2017 04:12 pm)


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

#19

AussieChris
Member
From: Lithgow, NSW
Joined: 08 April 2015
Posts: 221
Member
13 January 2017 08:53 pm

Damn you are pretty handy Boulders, getting some nice colour there too.
That cupboard lining is interesting, kinda looks a little like that Martin Gold Stop Mat.
Also Rinse aid is a surfactant that reduces the surface tension of water, a drop or 2 will help with floaters and maybe the drag you are experiencing from when you shut the water off? In the US/Canada its that Jet Dry not sure if we have the stuff here, but dishwasher Rinse Aid is the same thing.


"About 10 minutes into it everything changed, buckets were flying ... people were bleeding. Girls were unconscious."

#20

Occasional_panner
Member
From: Melbourne, VIC
Joined: 20 July 2016
Posts: 1,514
Member
13 January 2017 09:01 pm

You have a great idea there, but maybe try mounting the motor 90deg to what you have done.
The way it's positioned now it appears to provide sideways jogging.
When you tap a gold pan it's from the top directed down. So if you mounted that motor 90deg to what you have done, those shock waves will travel down the board, instead of across it.
It may or may not work better, worth a try.
Something else to consider would be a motor mounted away from the miller table and only contacting the back of the table when the eccentric is at it's furthest extent. Thus creating that TAP motion, rather than a continual vibration from a device fixed to the board.

Last edited by Occasional_panner (13 January 2017 09:05 pm)


4500, diy banker with dream matt and a diy dryblower. PMAV member.
I must have been a wombat in an earlier life, I just love digging.

#21

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
14 January 2017 01:22 pm

Occasional_panner wrote:

You have a great idea there, but maybe try mounting the motor 90deg to what you have done.
The way it's positioned now it appears to provide sideways jogging.
When you tap a gold pan it's from the top directed down. So if you mounted that motor 90deg to what you have done, those shock waves will travel down the board, instead of across it.
It may or may not work better, worth a try.
Something else to consider would be a motor mounted away from the miller table and only contacting the back of the table when the eccentric is at it's furthest extent. Thus creating that TAP motion, rather than a continual vibration from a device fixed to the board.

I'll have a go at rotating the motor 90 degrees. I'll just mount some little angle brackets for a quick test run and if it works better I'll print out a new bracket.

Creating a tap motion will be alot harder to do. I'd have to scrap the offset weight and build an arm that would tap the tray on every rotation rather than brushing past it.


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

#22

Boulders
Member
From: Sydney, NSW
Joined: 15 December 2016
Posts: 172
Member
14 January 2017 01:26 pm

AussieChris wrote:

Also Rinse aid is a surfactant that reduces the surface tension of water, a drop or 2 will help with floaters and maybe the drag you are experiencing from when you shut the water off? In the US/Canada its that Jet Dry not sure if we have the stuff here, but dishwasher Rinse Aid is the same thing.

Aussie Chris I have been using the Finish Rinse Aid. Works a treat. As you said it stops the fine stuff from floating away and helps it stick to the mat.

It's when I stop the water flow it starts to creep away. I took the advice earlier and sanded the mat down so that has seemed to stop that problem now.

Keep the ideas and recommendations coming people.


New to fossicking. Sluicy GS21 Highbanker, Thornado 6.5hp pump, Minelab X Terra 705 Dual Coil Pack.

#23

Mackka
Member
From: Brisbane
Joined: 18 February 2014
Posts: 1,685
Member
14 January 2017 01:46 pm

Great piece of engineering mate.
Mackka

1 user likes this post: Boulders

#24

wombat digger
Member
Joined: 06 December 2017
Posts: 19
Member
06 December 2017 08:19 pm

Hi. The idea of using the document tray is a good one. I might give that a go as a starting point. What size pump did you ues. Surely it would not require to many gal per hr.

#25

7.62marksman
Member
From: Nowra, NSW
Joined: 26 July 2016
Posts: 3,455
Member
06 December 2017 08:24 pm

from memory it was a small builge pump (but i could be wrong)


Highbanker, Sluice, Trommel, Gold Monster 1000 (Khaleesi), M/Lab 16000, Goldseeker 3D 12000, Bounty Hunter "Rustler",
Non Turbo 2.8lt Hilux called Turtle and a NAPFA member ----An ordnance technician at a dead run outranks everybody


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