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Pinpointing problem with the CTX

Posted: Sun Oct 14, 2018 9:40 pm
by Giz
Recently I have been using the 17 inch coil, however I'm finding accurate pinpointing a big problem with targets over 3 inches/7.5cm either by using CTX built in pinpointer or moving the coil until the target is on the edge, TBO I'm digging wide holes to get to the target and getting some what bemused B| , don't have this problem with the stock coil, can this be resolved or is this a recognised issue. Today I've been on 1 field that has been recently drilled and is not compact, whilst the other field was well compacted. I welcome your thoughts and hopefully a "cure" ::g, another thought is the 17 inch coil intended for larger deeper targets?

Re: Pinpointing problem with the CTX

Posted: Sun Oct 14, 2018 11:37 pm
by fred
Giz wrote:
Sun Oct 14, 2018 9:40 pm
Recently I have been using the 17 inch coil, however I'm finding accurate pinpointing a big problem with targets over 3 inches/7.5cm either by using CTX built in pinpointer or moving the coil until the target is on the edge, TBO I'm digging wide holes to get to the target and getting some what bemused B| , don't have this problem with the stock coil, can this be resolved or is this a recognised issue. Today I've been on 1 field that has been recently drilled and is not compact, whilst the other field was well compacted. I welcome your thoughts and hopefully a "cure" ::g, another thought is the 17 inch coil intended for larger deeper targets?


Put both fast and deep on at the same time and the pinpointing should tighten up to virtually the same as the stock coil.

Alternately just swing a bit faster when pinpointing a target. ::g

Re: Pinpointing problem with the CTX

Posted: Sun Oct 14, 2018 11:48 pm
by CTX_Phil
Use the little indent on the coil behind the stem near the serial number sticker as that tends to be about right for digging ::g

Re: Pinpointing problem with the CTX

Posted: Sun Oct 14, 2018 11:56 pm
by Easylife
It may not be relative but the dry ground can play some very strange tricks. x;

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 12:03 am
by fred
Easylife wrote:
Sun Oct 14, 2018 11:56 pm
It may not be relative but the dry ground can play some very strange tricks. x;


Also iron can often be about 4 or 5 inches to one side, never did figure out why. ::g

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 12:06 am
by Easylife
fred wrote:
Mon Oct 15, 2018 12:03 am
Easylife wrote:
Sun Oct 14, 2018 11:56 pm
It may not be relative but the dry ground can play some very strange tricks. x;
Also iron can often be about 4 or 5 inches to one side, never did figure out why. ::g
Yep, that will definitely throw it out - can make for some embarrassing dig holes. :D ::g

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 12:16 am
by fred
Easylife wrote:
Mon Oct 15, 2018 12:06 am
fred wrote:
Mon Oct 15, 2018 12:03 am
Easylife wrote:
Sun Oct 14, 2018 11:56 pm
It may not be relative but the dry ground can play some very strange tricks. x;
Also iron can often be about 4 or 5 inches to one side, never did figure out why. ::g
Yep, that will definitely throw it out - can make for some embarrassing dig holes. :D ::g


I found that the Minelab 35 pointer on full power is damn good at finding those embarrassing large bits of iron to one side of holes! Once offset iron is suspected the discrimination soon confirms the likely metal. :D

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 12:32 am
by Easylife
fred wrote:
Mon Oct 15, 2018 12:16 am
Easylife wrote:
Mon Oct 15, 2018 12:06 am
fred wrote:
Mon Oct 15, 2018 12:03 am

Also iron can often be about 4 or 5 inches to one side, never did figure out why. ::g
Yep, that will definitely throw it out - can make for some embarrassing dig holes. :D ::g
I found that the Minelab 35 pointer on full power is damn good at finding those embarrassing large bits of iron to one side of holes! Once offset iron is suspected the discrimination soon confirms the likely metal. :D
Get you with your posh discriminating pin-pointer! :D ::g

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 12:37 am
by Easylife
Probably my strangest one was a chest plate buckle about a foot down and it was still a few inches to the side of the hole. I reckon the angle threw it out? :-/

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 12:56 am
by fred
Easylife wrote:
Mon Oct 15, 2018 12:37 am
Probably my strangest one was a chest plate buckle about a foot down and it was still a few inches to the side of the hole. I reckon the angle threw it out? :-/
Targets on edge can be a swine to pinpoint anyway. They may give a double blip if reasonably shallow or may just be off to one side. I found that with the CTX a large hole was a must anyway simply because most of the signals in our well hammered pasture fields were so deep. ::g

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 8:12 am
by Giz
Put both fast and deep on at the same time and the pinpointing should tighten up to virtually the same as the stock coil.

Alternately just swing a bit faster when pinpointing a target. ::g
[/quote]

Fred, do you mean to detect with both fast and deep on or to toggle with an identical programme plus fast and deep on when finding a target. ::g

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 8:29 am
by fred
Giz wrote:
Mon Oct 15, 2018 8:12 am
Put both fast and deep on at the same time and the pinpointing should tighten up to virtually the same as the stock coil.

Alternately just swing a bit faster when pinpointing a target. ::g
Fred, do you mean to detect with both fast and deep on or to toggle with an identical programme plus fast and deep on when finding a target. ::g
[/quote]

Nothing to stop you either way. I always used fast and deep on with my normal detecting programme. The only time that I ever toggled with the CTX was by accident but that was because all my land is deep pasture and i detect with an open screen anyway with just a few squares blanked out to get rid of nails. ::g

If you give it a try do let us know how you get on.

PS I've just noticed what you are actually doing. I always swung the detector across the target left to right and right to left until I got a location under the sweet spot on the coil (which is just about where the logo is). Then I did the same thing at right angles. The target is under where the two sweeps cross. :D

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 8:38 am
by fred
CTX_Phil wrote:
Sun Oct 14, 2018 11:48 pm
Use the little indent on the coil behind the stem near the serial number sticker as that tends to be about right for digging ::g
Amazing! It's under the logo in front of the stem on mine? :D

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 11:20 am
by slowsweep
tbh i never had a problem with the big coil using the "wiggle" method and i always added 2-3" to where the target was on any type of ground and beach.

Hope you get your head around it.

GL&HH

Re: Pinpointing problem with the CTX

Posted: Mon Oct 15, 2018 12:11 pm
by Giz
Thanks all for taking the time to guide me in the right direction. Come to think of it I used to have the Sov Gt a time ago and always when finding a target I turned 90 degrees to form a cross used to work well, unfortunately as you advance in years the memory does deteriorate. I then got the Deus and TBO only done the "wiggle" one way, shortened the sweep area, speeded up the sweep and the target was pinpointed. Different machine, different method, perhaps or operator malfunction. :D