Confused about Iron Wraparound disc setting

[bklein]

I have Andy's book and am confused by pages 74 and 75 in regards to iron wrap around. Why does the area A page 74 being white allow for wrap around? He says blacking out the upper two lines will prevent it. On page 75 he says it shows a beach pattern but changes need to be made. Again he says 2 lines indicated by "A" but A doesn't indicate two lines... The diagram on page 122 does show this change - but it would have been a better instructional approach to just show the best-case beach program and then say why.
My question is: why having A blacked out stops Iron wrap around? Just where do you guys see wrap around occurring - because for me I see primary target hits in the lower right of the screen with secondary hits in the penny area 12-43 or close-by. I never see secondary hits where his A lines are on top left. This is for crusty, rusty, iron crap found at the beach. Maybe such iron scrap stuff on land is different? I would expect to stop a wrap around susceptibility you would have to just black out the two areas that the hit occur in - and these aren't my two areas.

 

[MINELABBOB]

HERE IS A SAMPLE

the upper right being 1-48----1-50 is were most of your iron nails / iron will try to come in disc. out 1-49---1-50 down the right side to 17 line

photo no# 223 is my test pattern if you set one up in FC AND SET ONE UP IN HT to check 4 iron works most of the times wen in HT

IRON WILL GO DOWN !! to bottom right use comb. mode tone brake 10-25-40 down to 25 any iron will low tone wen in allmetal.



minelabbob

 

[Justme]

Iron will often come in on lower section of screen around line 34 35. If its a big enough piece the next line would be 36 but since there is no line 36 the line would wrap around to horizontal line 1. Ive seen it do that. Iron will come in on line 50 also. So you may get a target that reads 1-50. Quite likely a piece of iron. Also watch screen for smeared yellow dots. Likely junk. A good target will come in on line 12, but because of varying ground conditions the same target may come in a different line.for example a nickel in my area normally sounds off at 12-13. If the number comes in at 11/13 or 13/13 with a nice crimson dot on my screen the target is coming out. Ive dug nickels at 11-13.

 

[bklein]

I normally see iron nails etc. on lower right and basically never at top right. Is this because it is beach - are you detecting beaches or inland?

 

[glenn3-88]

Bklein you are right on the nails but larger rusted objects that could be mis-interpreted as a good
silver hit will sometimes wrap around as far as 2-45. I've had that happen, dug it and it would be
a rusted part of a ship like a rusted bolt etc. I have also hit silver quarters at 11/45 12/45 and 13/45.
The wrap around affect of how far down the FE line it goes has a direct affect on how fast you are
swinging across the target. What I see is that when it "wraps around" to 1-2-or 3 I can slow my
swing down and it drops to 34 or 35

 

[bklein]

I just ran a test on a small iron chunk and a big and smaller rusted nail (from a firepit area). (attached photo)
First I see that I mistakenly had an opening on the F35 line of Pattern 2 near where this some of this stuff was hitting. Very hard to see in daylight but a quarter inch or so area was white. So I made sure the whole bottle line is now black.
I see now that what is really messing me up is the Separation modes. As MinelabBob and AS's book says on page 38 - things move on the Ferrous scale depending on this setting.

Small Iron chunk:
Low trash= no audio, red square at bottom
High trash= sameFerrous/Coin=red square at bottom, occasional hit at 12/43 with occasional tone
Ferrous coin= red square at bottom with occasional 12/43 and occasional tone (is this wrap or what?)
Ground Coin=no audio, slight red hash F35 lower right.

Big Nail:
Low trash=32/47,audio
High trash=33/47,audio, but no ID until I move off target and come back
Ferrous/Coin=32/47 audio
Ground Coin= 33/47 audio, no ID until I move off target and come back

Small Nail:
Low trash=33/46,audio, sometimes no ID
High trash=33/46, audio
Ferrous/Coin=33/46, audio
Ground/Coin=33/45, audio, no ID till I move off target and come back

Steel plate:
Low trash: 14/39 and all over
High trash: 17/39 and all over
Ferrous/Coin: 11/35 with red square at bottom right
Ground Coin: 12/40 and all over

So I don't see Iron wrap around yet with these tests unless you count Ferrous Coin hitting 12/43.
That open space on F35 was probably making me dig lots.
What should I test on around here that should show the wraparound?

Now I'll test bottle caps and hair pins (see my second thread).

Barry

 

[bklein]

Wow, ferrous coin puts the bottle caps into 11 or 12 Ferrous range (on the 20 or so I tried!). Forget this mode for the beach!

Below are results for a very rusty one and a nice new one:

Low Trash rusty=1/05 clean=1/20
High Trash rusty=1/05 clean=1/25
FerrousCoin rusty=11/16 clean 12/28
Ground Coin rusty=1/09 clean 1/20

I was in Beach mode but on my front lawn.

Barry

 

[MINELABBOB]

ALSO BIG IRON
25-35 LINE most time i check with HT and it tells me most time wen its iron and wen relic hunting use HT as FC will show up on 12 line !! alot

but it wont take long to setup a pattern / mode that will give you a 90% to tell iron relic hunting go all-metal HT takes a little time but you will get it

 

[bklein]

I'm unfortunately double threading with this but it is too good to miss.
I found that the noise channel affects the detection of bobby pins. It is a linear response= Channel one definitely hear them all, channel 11 they are dead quiet.
Use Normal mode as others like Smooth will stretch out the response and you will hear some (with a lesser Noise channel number).
I wonder what this means for small gold targets??

 

[MINELABBOB]

SM. GOLD CAN BE A PROBLEM UNLESS ITS RITE UNDER THE COIL

FBS does a poor job on sm. gold now i am talking small !! and wen i say under the coil i mean less then 3in. but on normal size rings not a problem

this is saying good sensitivity also.