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#1

blayke
Member
Joined: 12 February 2014
Posts: 216
Member
24 February 2014 08:18 pm

ok so saw the idea here through a google search but thought id search for a little different than using a threeway hose adapter, so i went for some poly irrigation adaptors/pieces and a standard hose adaptor.

so bought the same green bunnings 16l round tub for $4.98
funnel $1.88
irrigation attachments $3.97
and some of the cheap Maxi Nails adhesive which has always worked for me in the past $2.80
so for $13.65 including the sealant adhesive i have the materials for my first try at a blue bowl!

it took about half an hour to cut everything down and glue together now just a couple days to properly dry and solidify the position of the output tube in the bowl (facing slightly down)

by measuring the width from multiple angles and marking the dead centre then measuring the width of the base of the funnel i could accurately position it dead centre....so i got a needle and piece of fishing line with a marker attached and drew a circle around the middle of the bowl (where the funnel sits) so theoreticall it should be dead centre or near enough as makes no difference.

all i need now is some cons to test it! will post pics of it working once i get some...

on another note anyone that has used these, what is the best mesh to screen with to keep that fine gold?

1393233409_20140224_180934.jpg
1393233433_20140224_181947.jpg
1393233451_20140224_182000.jpg
1393233485_20140224_191208.jpg

any ideas please let me know

#2

Ramjet
Moderator
From: Maitland, NSW
Joined: 19 February 2013
Posts: 15,822
Moderator
24 February 2014 08:42 pm

Looking good Blayke.
Be good to see how it works out.


Touch the Frog.
Garrett At Pro, XP Deus, CTX 3030, pin pointer. Oldest find 1807 halfpenny, oldest silver 1854 threepence.

#3

blayke
Member
Joined: 12 February 2014
Posts: 216
Member
24 February 2014 08:56 pm

thanks, yeh heading out to glendon campgrounds in warwick this weekend so hopefully get some good cons to test with smile

#4

Nugget
Member
Joined: 27 November 2012
Posts: 6,041
Member
24 February 2014 09:04 pm

Thanks for sharing mate, I hope to build one of these myself sometime very soon.

#5

blayke
Member
Joined: 12 February 2014
Posts: 216
Member
24 February 2014 09:15 pm

nugget, providing it actually works....which it should....for $15 and half an hour (dremel made things a heck of a lot faster) i think its a bargain....or you can buy off ebay for $140 lol...sorry also forgot to say the only thing i did a little different to most of the others i seen homemade was use a different funnel ie one with a much steeper degree which i believe may keep more of the really fine gold but get right down to eliminating the black sand also....but only a test will prove its worth

#6

Ramjet
Moderator
From: Maitland, NSW
Joined: 19 February 2013
Posts: 15,822
Moderator
24 February 2014 09:40 pm

I think you are on the right track with the steeper angle of the funnel blayke.
My first attempt has a more shallow angle funnel.
Here is a pic of the dimensions of the proper blue bowl.
Sorry I can't remember which forum member posted it originally.

1393238372_1382933243_image.jpg


Touch the Frog.
Garrett At Pro, XP Deus, CTX 3030, pin pointer. Oldest find 1807 halfpenny, oldest silver 1854 threepence.

1 user likes this post: MarcusBerlin

#7

Goldtarget
Member
From: , VIC
Joined: 12 January 2014
Posts: 2,414
Member
24 February 2014 09:48 pm

I'm a little curious about these homemade blue bowls and i really hope noone sees this as criticism, (not my intention at all) but after observing a genuine one in operation i have observed what seems to be a distinct design difference which has me wondering. The original has a clear lip at the top of the funnel, Obv intended to sort the lighter material and behave as a horizontal riffle to stop any fine gold from escaping over the top. Yet in these homemade ones it seems mostly absent. I would love to see how these perform as i intend on building one, subject to their ability to discriminate correctly. Any video of an operating homemade one without it would be fantastic.

#8

blayke
Member
Joined: 12 February 2014
Posts: 216
Member
24 February 2014 09:48 pm

wow only 5cm funnel height.....hmmm seems a little shallow.....im going to see what happens my thinking is having it slightly higher around the 7-8cm i can increase the flow a little higher to pick up the black sand aswell....ill give it a go anyway and see if any yella goes into the bucket below or not worth a try.....

#9

blayke
Member
Joined: 12 February 2014
Posts: 216
Member
24 February 2014 09:52 pm

no worries target.. yeh i did notice the lip hence buying a particular funnel with a deeper neck and not so much a lip but the angle becomes a vertical honestly though if this doesnt work that just got me thinking.....make it $15 buy a second funnel cut them at the same section but invert one and glue them together, ergo creating an identical lip to the genuine bowl wink. but i will test it this weekend when we are out digging at glendon....get some fines and ill post it to youtube and put a link here when its up smile

now im wishing i thought of the second funnel thing earlier haha oh well ill test it first as is

also as a secondary idea....it would be extremely simple to use a course sand paper and put some small grooves into the funnel, do you guys think that would help prevent the fine gold from rising?

Last edited by blayke (24 February 2014 09:54 pm)

#10

Goldtarget
Member
From: , VIC
Joined: 12 January 2014
Posts: 2,414
Member
24 February 2014 09:59 pm

I applaude your efforts and i really do hope it works a treat. As soon as someone designs a home made spiral wheel I'll be even happier! I've walked many an aisle looking for that elusive shape. In the mean time I'm panning away. if i ever find it you'll be the first to know. a video would be great, i love the innovators around here, makes this not only a fantastic hobby, but a truly great forum. Thanks for sharing.

#11

Snowy
Member
From: Ningi, QLD
Joined: 12 February 2014
Posts: 70
Member
25 February 2014 12:16 am

I got my blue bowl for a present  a couple of year ago, yours looks just like the real thing at a fraction of the costs, only thing I would add is a flow adjuster on the outside of your bowl to regulate the water flow so you get the right amount. Looks great

#12

blayke
Member
Joined: 12 February 2014
Posts: 216
Member
25 February 2014 08:06 am

yeh I looked at the flow adjusters but using the tap...can just turn the tap uo and down. I'll see if it works otherwise yeh ill get a flow adaptor too assist

#13

Ramjet
Moderator
From: Maitland, NSW
Joined: 19 February 2013
Posts: 15,822
Moderator
25 February 2014 11:06 am

Goldtarget wrote:

I'm a little curious about these homemade blue bowls and i really hope noone sees this as criticism, (not my intention at all) but after observing a genuine one in operation i have observed what seems to be a distinct design difference which has me wondering. The original has a clear lip at the top of the funnel, Obv intended to sort the lighter material and behave as a hourizontal riffle to stop any fine gold from escaping over the top. Yet in these homemade ones it seems mostly absent. I would love to see how these perform as i intend on building one, subject to their ability to discriminate correctly. Any video of an operating homemade one without it would be fantastic.

I created the lip in my bowl by using another cut down funnel.

1393286762_funnel.jpg


Touch the Frog.
Garrett At Pro, XP Deus, CTX 3030, pin pointer. Oldest find 1807 halfpenny, oldest silver 1854 threepence.

#14

blayke
Member
Joined: 12 February 2014
Posts: 216
Member
25 February 2014 12:43 pm

haha ramjet yeh I posted that last night when he said...thought it would work the same but I'm going to test this first anyway

#15

V_8
Member
Joined: 07 January 2014
Posts: 55
Member
25 February 2014 02:34 pm

Hey Guys,

I have a 3D printer and have been printing the centre pieces for the home made blue/green bowls - its ABS plastic and works a treat. I could knock a few out if members are interested

1393299235_centre1.jpg

1 user likes this post: mad Mike

#16

blayke
Member
Joined: 12 February 2014
Posts: 216
Member
25 February 2014 02:51 pm

haha that's sweet, I've been playing with the 3D printer we have here at officeworks (I work there) lol great fun....I would definately be keen....The extra advantage of the 3D printed Centre is the little lines aall the way up would act as mini riffles perfectly...I'd definately love to try one

#17

V_8
Member
Joined: 07 January 2014
Posts: 55
Member
25 February 2014 03:55 pm

Yeh, that one was printed with a .01 mm layer height, and its red cause that's what I had loaded up on the printer, i can make them green or blue or whatever colour. I could give it an acetone vapour bath to remove the slight ridges, but like you say they act like mini riffles. Tested on the weekend and it worked fine, the only probs were the cons weren't classified to the same size - a definite must. It was made for the regular small blue bowl, a friend bought the larger green bowl and it also worked in that - just needed the $40 pond pump from Bunno's to run it.

#18

Ramjet
Moderator
From: Maitland, NSW
Joined: 19 February 2013
Posts: 15,822
Moderator
25 February 2014 04:17 pm

Clever V_8  smile


Touch the Frog.
Garrett At Pro, XP Deus, CTX 3030, pin pointer. Oldest find 1807 halfpenny, oldest silver 1854 threepence.

#19

TenOunce Tone
Member
From: Cairns, QLD
Joined: 18 March 2013
Posts: 1,382
Member
25 February 2014 06:21 pm

Good job, you may find the little riffles actually stop the thing working properly.. I would think they would catch the material and interrupt the water flow over the top.. anyway, if it works it works.

Cheers, Tone


One man, One pan, One goal!

#20

joe
Member
Joined: 06 February 2013
Posts: 1,167
Member
25 February 2014 09:53 pm

Clever V8, smile has anyone printed their own sluice yet? Would be Interesting to see

#21

trenchfighter
Member
Joined: 12 December 2013
Posts: 196
Member
26 February 2014 11:24 am

joe wrote:

Clever V8, smile has anyone printed their own sluice yet? Would be Interesting to see

shite yeah!!


one bucket bucket at a time

#22

mad Mike
Member
From: Bargo, NSW
Joined: 26 June 2013
Posts: 234
Member
26 February 2014 11:34 am

I think I would prefer to print a 3d angelina jolie before a sluice  ..........


Walbanker, 2 turbo pans, keene pan, garrett super sluice , aldi detector , And no idea at all.....

#23

V_8
Member
Joined: 07 January 2014
Posts: 55
Member
26 February 2014 11:44 am

Printer can only go 250 x 250 x 225 mm so it would be a pretty small sluice, unless it was designed to clip together to make a modular sluice smile - can prototype highbankers and sluices and stuff to scale, maybe make spraybar nozzles and custom fittings. Has a heap of uses, if you need something in plastic it can make it.

#24

XIV
Member
Joined: 08 June 2013
Posts: 1,222
Member
26 February 2014 01:29 pm

so where do we order from?
that is a great idea
now all you have to do is use the blue bowl print above and make your own
if you make one be sure to share with the rest of us


One can never be wrong at doing the right thing.

#25

Ned
Member
Joined: 03 November 2013
Posts: 99
Member
26 February 2014 02:35 pm

A few questions on the 3D printer. 1. How do you calculate the amount of material it will take to form an object?
2. How expensive are the consumables. i.e. How much to form up the blue bowl (red) as shown

regards, Ned


Lake Macquarie NSW


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