End Of Swing Signal?

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Ruffers22
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End Of Swing Signal?

Post by Ruffers22 » Mon Jul 29, 2019 1:39 pm

Just A Quick Question,

Last time out,whilst walking a cart track through a wood. I seemed to start get a false signal at the end of each sweep?
I haven't had this happen before?

Question is:
Is it just the way I'm doing it ? rl;
ie my swing action, speed etc? or could it be something else?

I did try varying my swing speed, also noise cancelled a number of times, due to some nearby overhead power lines, ground balanced and also tried adjusting my sensitivity down a couple of notches, but nothing seemed to work?

Still fairly new to this so any tips or help would be greatly appreciated.

Thanks

Craig



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Re: End Of Swing Signal?

Post by Dave The Slave » Mon Jul 29, 2019 1:45 pm

Had this happen last year on the 400i, although a different brand, could be the cause.
Found out the coil was loose, had overtightened the nuts to the point where the washers were distorted and not holding properly.
Ordered new fixing bolt set and problem was solved.
Hope this is of help, ::g
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Re: End Of Swing Signal?

Post by detecting rod » Mon Jul 29, 2019 1:46 pm

i get it as well,think it might be normal,but im new to it as well

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Re: End Of Swing Signal?

Post by Pete E » Mon Jul 29, 2019 2:01 pm

Ruffers22 wrote:
Mon Jul 29, 2019 1:39 pm
Just A Quick Question,

Last time out,whilst walking a cart track through a wood. I seemed to start get a false signal at the end of each sweep?
I haven't had this happen before?

Question is:
Is it just the way I'm doing it ? rl;
ie my swing action, speed etc? or could it be something else?

I did try varying my swing speed, also noise cancelled a number of times, due to some nearby overhead power lines, ground balanced and also tried adjusting my sensitivity down a couple of notches, but nothing seemed to work?

Still fairly new to this so any tips or help would be greatly appreciated.

Thanks

Craig
You can sometime get this if your coil brushes long grass/ other vegetation at the end of the swing...
You notice it more if you have any slack cable at the coil end and this moves slightly in relation to the coil ....
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Re: End Of Swing Signal?

Post by littleboot » Mon Jul 29, 2019 2:05 pm

Make sure your cable isn't loose and flapping about and that the coil isn't loose either.This kind of falsing does happen occasionally with all machines and is often something like that and is caused by the movement change at the end of the swing causing things that are a tad loose to wobble.
Kind of like when you hit a clump of hard stubble or whatever.
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Re: End Of Swing Signal?

Post by RossDG » Mon Jul 29, 2019 2:12 pm

Lifting/tilting the coil at the end of the swing can cause this - my last detector was very prone to it.Try a slower flatter swing, i.e. don't tilt or lift the coil just to see what happens. =P~
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Re: End Of Swing Signal?

Post by Fusion » Mon Jul 29, 2019 2:16 pm

The path is different soil, with different levels/type of mineral/iron in it, compared to the land each side. The transition at the edge of the path is enough to give a false signal. Try sweeping along the length of the path.
:(

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Re: End Of Swing Signal?

Post by Mancave-man » Mon Jul 29, 2019 5:33 pm

Sometimes I pick up my shovel at the end of a swing and also the zips on my waterproof leggings will give a faint signal. Hope you get it sorted one way or the other.

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Re: End Of Swing Signal?

Post by beaubrummell » Mon Jul 29, 2019 6:00 pm

A chap the other day had the same problem which he said was cured by turning off his mobile phone.
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Re: End Of Swing Signal?

Post by Macroman » Mon Jul 29, 2019 8:29 pm

Hi,and yes I've had the same problem as you have experienced,and for me it was that there was excess cable loosely coupled around the detector shaft,once it was all rewound the problem disappeared.
Hope it helps,Good hunting ::g

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Re: End Of Swing Signal?

Post by vladorado » Mon Jul 29, 2019 8:39 pm

I have the same phenomenon only in a specific area of a field where the soil is very mineralised. It affects only my Equinox 800 with 11'' and 15'' coils, but not the CTX3030.
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Re: End Of Swing Signal?

Post by fred » Tue Jul 30, 2019 9:48 am

It could be setup related, for example not ground balancing, but it sounds more like a swinging technique issue.

Try varying the length of your swing, the speed and the smoothness of how you change direction at the end. If any of these seems to make a difference then you know what you need to work on. ::g

There is also a possibility that the track has been reinforced at some stage with imported material like road stone. This could have different mineralisation to the surrounding soil and cause ground balancing or sensitivity issues.

Please do let us know how you resolve this. :D
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Re: End Of Swing Signal?

Post by Ruffers22 » Tue Jul 30, 2019 12:33 pm

fred wrote:
Tue Jul 30, 2019 9:48 am
It could be setup related, for example not ground balancing, but it sounds more like a swinging technique issue.

Try varying the length of your swing, the speed and the smoothness of how you change direction at the end. If any of these seems to make a difference then you know what you need to work on. ::g

There is also a possibility that the track has been reinforced at some stage with imported material like road stone. This could have different mineralisation to the surrounding soil and cause ground balancing or sensitivity issues.

Please do let us know how you resolve this. :D
Thanks Fred,

I'm starting to think it could be something along the track.
I was out last night in a different part of the wood and no problem at all?
I might have another walk down there over the weekend just to test the theory.

Cheers.

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Re: End Of Swing Signal?

Post by Norvs » Tue Jul 30, 2019 9:53 pm

Hi mate I use an Etrac and get this if I use the stem too far out making the bottom half of the detector and coil wobble which causes the falsing . I have found if I shorten my lower detector stem back inside the upper stem by about an inch the wobble stops and so does the falsing. Hope this makes sense and solves your problem. ::g ::g

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Re: End Of Swing Signal?

Post by Billy Doyle » Thu Aug 15, 2019 1:03 pm

Is it possible there is a buried old fence, or wiring, alongside the track that it is picking up? Mine can ping a fence target from quite some distance.

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Re: End Of Swing Signal?

Post by Koala » Thu Aug 15, 2019 3:45 pm

one of those with several possibilities

the fact it doesn't happen elsewhere would suggest its location not machine.or picking up spade trowel and so on.


paths and tracks are often have bricks and hardcore dumped along them. So are different to the surrounding ground.

another possibility is the track has been fenced in the past and the chain link has fallen down and now buried under the surface.

Drainage pipe

and so on.

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Re: End Of Swing Signal?

Post by pengles » Fri Aug 16, 2019 8:35 am

Had this happen on my first detector, a Garrett. It turned out to be the wire from the coil being a tiny bit loose and 'tapping' against the bottom of the stem. I secured the bottom part of the wire against the stem with a couple of small cable ties and it sorted it out.
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Re: End Of Swing Signal?

Post by slowsweep » Fri Aug 16, 2019 11:32 am

debris between the coil cover and coil can also cause falsing ;)
Just dig it and put your mind at rest

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Re: End Of Swing Signal?

Post by amphora » Fri Aug 16, 2019 3:43 pm

You could try to not twist or lift the coil at the end of the swing. That can give false signals at the ends of the swing.
That is happening while the ground balance or disc then gets interrupted and can not handle it.
Good luck hunting.
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