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Offline GoldDigger1950
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« Reply #10 on: November 23, 2010, 03:02:15 pm »
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I have a suggestion for you, Xavier. Buy some white plastic rods and cut them to 1/3 the depth of the coil. Secure them in at a few locations in the bottom before you lay the coil wire in it and Superglue(tm) the coil wire to the posts. That will elevate the coil itself to a constant depth and put it into the middle of the coil plane rather than at a possible slant. You will have to drill a few flat bottomed holes in your mold for this and then sand off the rod bumps that stick through later.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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Offline jimmyg8138
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« Reply #11 on: November 23, 2010, 03:08:06 pm »
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HI Xavier...You sure have a talent for this stuff. A job well done and I only wish I had a 10th of your patience and knowledge....Regards, jim


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Offline xavierTopic starter
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« Reply #12 on: November 23, 2010, 03:25:27 pm »
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Hi GD

No can do as I would have to make holes in the silicone and there is a risk that it will leak how ever I could quite easily do that on the next mold. What I do is use a piece of what ever that has a diameter under the one that I will be using like I did with the coil cable then it works just like a seal and no leak so for now I will just have to take the time to place the mold level then pour a thin layer then place the coil on top of that and then fill the rest to the top.


@ jimmyg8138

Thanks for looking and it's only mind over matter that's all there is to it any one can do this if they want to.


All the best
Xavier

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Offline GoldDigger1950
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« Reply #13 on: November 23, 2010, 03:29:03 pm »
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I understand. The posts just eliminate one pour and if you glue the coil down, it won't get a bubble and lift. I've had that happen before and the metal from the coil was very close to the surface, which of course becomes the bottom of the coil in use.

Your end result looks terrific, mate. Keep up the good work.

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Offline Mudflap
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« Reply #14 on: November 23, 2010, 04:37:29 pm »
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Nice job Xavier. A lot of attention to detail. Going to use that for your PI?

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Offline Idaho Jones
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« Reply #15 on: November 23, 2010, 06:10:14 pm »
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Excellent photo documented project Xavier!  Great You do good work

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Offline Gramps43
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« Reply #16 on: November 23, 2010, 10:26:04 pm »
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Wowzer McDude that looks gorgeoso and it's purdy too.  I looked into doing vacuum forming but finding parts that fit my buget became problematic so that hasn't gone anywhere.  i'm going to have to study your method what I can cone up with.  Sculpy is a product that is like clay, it works easily and dries slowly at room temp but you can but it in a slow oven and it dries much quicker with very little shrinkage.  I used to have a link to an outfit that sold supplies for mold making, I'm gona have to try and dig it.

Y'all take care out there in this crazy world,
Dennis

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« Reply #17 on: November 23, 2010, 11:36:04 pm »
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A few years ago I came across a place that used wax replicas. They coated them in sand and clay mix. Let it dry, then kiln baked the wax out of it. Then molten metal was poured an and it all was left to air cool. Its an old practice and can give you pretty good results. But I dont know anything about Detector coils, can you use metal for the coil? I have been reading about building a detector. One has the coils in the box. I wonder how all this would work? Too many years building stuff......now I got to go look at how coils are built.

Posted on: November 23, 2010, 11:30:59 PM
wow dude, your good.

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Offline xavierTopic starter
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« Reply #18 on: November 24, 2010, 02:46:16 am »
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Quote:Posted by Idaho Jones
Excellent photo documented project Xavier!  Great You do good work


Thanks mate it was meant to inspire people to do things and show them on the forum  Wink

Quote:Posted by Gramps43
  I looked into doing vacuum forming but finding parts that fit my buget became problematic so that hasn't gone anywhere.



Dennis Vacuum forming can be done with a vacuum cleaner and your oven as the heat source all you need is a plate (board) the shape that you want to form and your just about done.
Now place some sides and a bottom to your board make a hole for the vacuum cleaner pipe so that it will fit snugly. Drill holes 2mm will do all round the former then place the plastic on top of it all. Place in the oven (not to hot) and when the plastic starts to take the shape of the former turn on the vacuum cleaner using a wooden spoon hellp the plastic down to make a seal round the former. Once you have your shape let it cool with the vacuum still on.

Have fun
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Posted on: November 24, 2010, 09:31:46 AM
Hi Mudflap

Quote:Posted by Mudflap
Nice job Xavier. A lot of attention to detail. Going to use that for your PI?


Yes I will use it for the PI then from this one I will make one for the VLF it's just a question of adding the extra coil in the center of course I will have to make a new mold but by doing it this way half the work if already done.

Regards Xavier

Posted on: November 24, 2010, 09:40:54 AM
Hi casca

Quote:Posted by casca
can you use metal for the coil? I have been reading about building a detector. One has the coils in the box. I wonder how all this would work? Too many years building stuff......now I got to go look at how coils are built.

Posted on: November 23, 2010, 11:30:59 PM
wow dude, your good.


No you can't. There are lots of posts on the forum about coils how to make them what to do and not to do. Read em and weep

Regards Xavier

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Offline nickel_n
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« Reply #19 on: November 24, 2010, 04:23:59 am »
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thanks Xavier
I will try to use your method on my project.
I order 2 surf pi boards of silverdog about a week and a half ago.they haven't arrived as yet but I have most of the parts to populate them.so your instructions for the coil just come in at the right time.thanks again.
nickel_n

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