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Axiom Running Noisy At Quartzite


Rolland

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17 hours ago, Norvic said:

Rolland go back and check out Steves Axiom posts especially in regards to sensitivity settings. It is not an Auto machine as the 6000 is, thus requires user input and time to understand, master it and you will not be disappointed.

Agree! This^ This^ This^

It's not just about GB, frequency scan, and sensitivity (though it can be that simple in mild ground and low EMI).  I've summarized my approach to "noise" below based on Steve's Axiom recommendations and the settings descriptions in the user manual.

Every setting is critical and addresses the different sources of noise (EMI and Ground Feedback) that affect stability.

Rolland - it is essential that you learn how to differentiate whether the noise/instability you are experiencing is coming from ground feedback due to frequent variations in ground effects or hot rocks OR if the source is EMI.  I address a recommended methodology to figure this out below and what settings to adjust once you've figured out the source/type of noise/instability.

Ground related stability/settings:

GB is dual channel and different methods are spelled out in the manual to help you cancel ground/salt and/or hot rocks.  Learn the nuances.

Note that the mode selections are really timing settings that are geared more towards soil type (mild, difficult, hot, and salt) vs. target "size" (fine, normal large, and salt). So pick the mode based on your prevailing local ground conditions.

Decide on whether you want/need to use GB tracking noting that using aggressive tracking can affect depth and stability.  Coming from my GPX hot ground experience, I like to let the detector tell me (via ground feedback audio) when it needs to be manually rebalanced than risk missing marginal target signals by using tracking.  If I did consider using ground tracking, it would be no more aggressive than SLOW.

EMI related stability:

Start with default sensitivity and set SPEED to SLOW for maximum stability and run a frequency scan.  Adjust sensitivity as necessary and threshold to suit.  I like mine barely audible.  Don't be afraid to reduce sensitivity as necessary to get the machinecto run stable and quiet.  In high EMI suburban areas that might mean running sensitivity as low as 2 or 3, if that's what it takes to get a stable threshold to sense targetsxatvthe edge ofcdetection.  Yes you will lose depth and small target sensitivity but that's preferred to not being able to differentiate any target out of continuous noise.

To differentiate Ground Noise from EMI stability, set mode based on the prevailing ground conditions (i.e., mild/fine, difficult/normal, hot/large, or salt), Ground Balance with tracking off then keep your coil grounded and stationary.  If you experience noise/instability then the noise source is likely EMI > frequency scan and then adjust speed, sensitivity, and threshold as necessary.

HTH

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I've had the same issue with the headphones cutting out when I'm kneeling with the scoop.  Other than that I really like the Axiom. Lots of good advice in the above posts. Been alternating use with the wife's 6000 and both machines have their place. The Axiom grows on you as you learn the nuances of the machine.

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On 3/7/2023 at 8:50 PM, Rolland said:

also my head phones keep disconnecting and picking up noise unless I'm right next to head of detector

One thing I have learned on minimizing dropouts when using the Garrett wireless phones is to keep the receiver side of the phones (the cup with the power switch and status light) on the side of my head adjacent to my swing arm to keep my noggin from blocking transmission between the control head and the phones.  It really makes a difference.

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27 minutes ago, Chase Goldman said:

One thing I have learned on minimizing dropouts when using the Garrett wireless phones is to keep the receiver side of the phones (the cup with the power switch and status light) on the side of my head adjacent to my swing arm to keep my noggin from blocking transmission between the control head and the phones.  It really makes a difference.

Yup. The signal is easily blocked by body parts between the receiver and transmitter. This is the best tip for preventing drop outs you are going to see short of going to the separate WR-1 receiver as I have done.

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Rolland, 

One of the biggest contributors to EMI and instability that I have seen is detectorists having their cell phones on while in their pockets. I was helping a friend with his brand new ML GPX 5000 at Rich Hill, AZ. and my 5000 was running dead quiet, while his was unstable and noisy. I asked him to empty his pockets...his cell was on, he had car and house keys, change,  a wallet and other items. Once he removed all those metal and electrical items, his GPX 5000 ran quiet.?

Bill

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I don't know if it's the same with the Axiom as it is with the GPZ but having a Garrett Carrot in your pocket or anywhere really can make it run a bit unstable.  Even though the Carrot it switched off it still causes the issue.   It's the reason I upgraded (well downgraded it turns out) to the Minelab Pro-Find 35, I then wasn't happy with it and changed over to the XP Mi-4 pinpointer which also disengages the pinpointer coil

This image below is Minelab's Pro-Find marketing for the feature.

DIF.thumb.jpg.9133a3f0caa00cc017017690b56fffc7.jpg

Just something to keep in mind if you're having EMI problems and can't work out why, it is another possible cause.

It appears to really work, both the Minelab and XP are quite a bit better than the various other pinpointers I own without the feature.

 

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On 3/9/2023 at 2:29 PM, cobill said:

Rolland, 

One of the biggest contributors to EMI and instability that I have seen is detectorists having their cell phones on while in their pockets. I was helping a friend with his brand new ML GPX 5000 at Rich Hill, AZ. and my 5000 was running dead quiet, while his was unstable and noisy. I asked him to empty his pockets...his cell was on, he had car and house keys, change,  a wallet and other items. Once he removed all those metal and electrical items, his GPX 5000 ran quiet.?

Bill

No wonder mine is always noisy ?

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