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Semi Auto/whats going wrong?.

A

Anonymous

Guest
Living in Scotland, we are not so fortunate to be able to reach highs of 20 and above in manual sens., we on average only get between 10 and 15.This question re auto sens applys not only to myself ( so no faulty machine)but also to my 2 friends who also have explorers and have the same problems.
When we switch to semi auto , say at man setting 16 when we are only getting 14 on man, the machines dont seem to look below 16 they always go eratic telling us that it has set its self on a number higher than14.Trying noise cancelling manually or auto. makes no diff.Even when we set the man sens to 0 and then hit auto it settles on a number that is too high and unstable.If the auto setting trys to go higher than 0 is it not doing what it should not be doing.
All other aspects of the machine are 1st class,I only feel that in our conditions auto would be ideal but we are unable to use it.
The auto sens on the sovereign was and still is superb.
Has anyone else found this problem and is there an answer.many thanks for your time.
 
I recently pointed out that, if you were to set your sensativity to 1, and compare auto against manual, you will find that your detection range in auto is much greater than a manual 1.
My guess here is that auto sensativity breaks the rule (the maximum value is used, but only as a reference point) for maximum sensativity. Coming much further down might have positive effects for you. This is only a guess - I haven't played with it at all as I have had no need.
My suggestion would be to experiment a little and see if auto 10 or lower has a positive effect. The detection range when set to a sensativity of auto 1 certainly isn't as great as 16 manual. I think that you can get what you want, but unfortunately you will have to experiment a little to get there.
Noise cancel has nothing to do with it. Noise cancel is only good for getting around ambient electronic noise, such as what you get around powerlines and the like.
Tim
 
Hi Tim, many thanks for your comments.As you say I will just have to play around and see whats best.Regarding your point re noise cancel.I also was under the impression that this had no effect on sens. until I tried the following.Noise cancel as normal , then set man. sens as high as you can before it nulls when searching.If, as in my case this is 14,(can be any no.) notch it up 2 or 3 and then manually change noise cancel numbers, you will find that there is a number that will allow you to increase sens.It may be the case that the explorer selects an optimal number rather than going for max sens. possible.Can some guys try this and see if the same occurs or not.
 
I agree, there is a relationship between sensativity and electronic noise as you will be more likely to have problems with noise with a heightened sensativity.
The point that I failed to make was that noise cancel has little to do with ground mineralization and should not be confused with GEB - the Explorer should hand that automatically.
Tim
 
Davie,
I too have seen one area I have to use semi auto while others I run manual. I feel it is because in semi auto it is trying to adjust, but conditions are changeing causeing it to be unstable or chattering.
I have used mine in semi auto and it will not be stable and by going just to manual it will be OK while other times while in manual it will not be stable and by going to semi auto it will be fine.
If the area you are at dont work in semi auto I would just run it in manual.
Rick
 
I have noticed this too.Selecting a semi-auto sensitivity of 32 seems to give the explorer the ability to select a setting beteen 16 and 32,now that this has been noticed maybe minelab will lower the min. to like 8-10 range if they can not make it to 1 .
 
Hi Russ thanks for your reply.
Iam not sure 16 would be the correct min no. If you put your sens. at manual Zero, then hit auto, it should give you a setting which is under 10. Iam not sure this is what is ment to happen. You can easily check this by seeing how much depth you get on a coin (in air) at Auto 0, then try it again with man.10, you should get more depth with man 10.
I have a few ideas to try today to see if I can get round this problem.
"UNABLE TO USE AUTO SENS. ON GROUND WHICH WILL NOT GIVE YOU A HIGHER MANUAL SETTING THAN 12/14."
ANY OTHER ADVISE WOULD BE APPRECIATED. Many thanks.
 
Hi Davie, not too familiar to exactly how auto works and I dont use it much. I have seen areas that auto did indeed do better than manual and that was in very highly mineralized ground. also it seems to minimize the affects of hot rocks. not sure if auto has a preassigned minimum value though I suppose its possible. Dont remember if auto doesnt even go by the manual setting, maybe it over rides all manual settings trying to go as high as it can, which in the case of certain ground could explain your problem.. always adjusting itself in your ground causing falsing. I know that if I do try auto I get those thumps and barely audible falses more. What kind of noise do you get when running high manual? low tones? high tones? mixture? Sometimes if I start getting lots of low tone falses(conductive mode) I just reject a small part of the bottom of the screen and it settles down.. if its bouncing that wont help.. at any rate I would say just run as high in manual as you can and keep it slow.. not sure just how much depth is lost at those settings.. one of these days if I remember and I get a deep signal I will try lowering my sens till I lose it just to see how much affect it really has
 
Thanks Jim. I run on ferrous with IM. @16.When I go too high on manual sens. it gives me low iron tones evrytimr I move the coil. I have tried putting it to conductive and setting no threshold to stop hearing the constant nulling, but if you force the sens 3 or more above where it is stable on the move , it loses depth and cant ID.
We feel that we have a superb machine but with the present set up (sens. auto sens,niose cancel )we cannot use it to anywhere near its full potential.
Possibly Explorer mark II will have all these small but annoying things ironed out. We may even get a disscount for trying the 1st one out.
 
try bumping iron mask to at -14 that will get rid alot of the low tones without masking much of anything.. do you use the 10 inch coil? if so try to get the coil inserts from Sunray, or better yet an Sunray X8 coil, that runs about the most stable of all at gigher sens levels and you dont lose major depth
 
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