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Hello men,I have the following question
Is a detector (VLF) disturbed by a metal coil screw?
Is a detector (VLF) disturbed by a metal coil screw?
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Yes, it's 'disturbed' by it. But if you use stainless steel , and use a small diameter bolt ( 3mm, rather than 5,6,8mm ) your machine should be OK. -
The old Tesoros and C-Scopes had metal screws.Then were the developers stupid?Comment
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Were they stainless steel ?
If you design your product to use a metal bolt, then you can choose to set up the coil balance/null accordingly, so that it's correctly nulled with the bolt in-situ.Comment
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This is discussed in Inside the METAL DETECTOR page 196.Originally posted by Andi68 View Post
The metal bolt can result in phantom signals, even though it can be balanced out.
Conclusion: Use a plastic bolt.Comment
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I did have an old C-Scope in for repair a few years ago, and that had a stainless steel bolt, 3mm diameter, though the nut was a nickel-plated brass one, curiously.
I think maintaining symmetry is worthwhile if you use a metal bolt, so the bolt should be above the centre of the coil. If your coil has offset ears, the imbalance could result in different coil behaviour from front to back. I don't know what odd behaviour this may give, George's 'Phantom signal' may be one. Inaccurate pinpointing may be another ?Comment
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And I posted this on a UK forum a few years ago. Brass, stainless steel and 8.8 high tensile steel bolts compared. The S.S bolt gave the weakest signal by far, one tenth that of brass.
https://www.metaldetectingforum.co.u...p?f=45&t=82852Comment
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