Chinese MD-3010II - Garrett ACE-250 clone?

[kt315]

coil and PCB photos http://www.md4u.ru/forum/viewtopic.p...020fecc1eb2298

[DOOLEY]

hello KT315 ,

they look very thick copper wires on that coil , is it a PI ? and if so , why 4 wire ends on outer coil and 4 wire ends on the inner coil ?

and what's going on with the bundle of wire on the outer coil ?

all looks very strange .

[oldchemistJohn]

MD3010-II delayed response

I am new to this forum. I have just received a new MD3010-II, and have found that it responds to various metals in the all metals mode with appropriate sensitivity, but with about a 1 second delayed response to passing the metal in front of the centre of the coil. Thus the bip comes when the target is well away from the coil.
The Chinese supplier say that they tested it prior to delivery and it worked properly. Well it did not when I received it. My question is- is it possible that the use of X ray equipment by Customs officials could have upset the binary codes used in the microprocessor in this unit or similar detectors so as to have caused such a delayed response? If so then there must be many others out there with similar apparent faults with their units, as most countries use X ray equipment to look for drugs etc in imported items. I hope this is the appropriate location to ask this question.

[Skippy]

It looks rather like the main TX winding is the small central coil, and the RX and bucking are on the large outer winding. The two extra wires on the inner coil are to fine-tune the number of turns, eg. wind with 20T and 1T gives you the choice of 19,20 and 21T. Hence why two of these wires are joined.The wire bundle (and preset pot?) is presumably for nulling the balance.

[Qiaozhi]

I am new to this forum. I have just received a new MD3010-II, and have found that it responds to various metals in the all metals mode with appropriate sensitivity, but with about a 1 second delayed response to passing the metal in front of the centre of the coil. Thus the bip comes when the target is well away from the coil.
The Chinese supplier say that they tested it prior to delivery and it worked properly. Well it did not when I received it. My question is- is it possible that the use of X ray equipment by Customs officials could have upset the binary codes used in the microprocessor in this unit or similar detectors so as to have caused such a delayed response? If so then there must be many others out there with similar apparent faults with their units, as most countries use X ray equipment to look for drugs etc in imported items. I hope this is the appropriate location to ask this question.

The X-Ray equipment at the airport would not affect the microprocessor firmware.

I have not seen one of these clones yet, but my suspicion is that the micro is not responding fast enough. In other words, the delay is caused by the time it takes for the target to be detected and the micro emitting an audio signal. If this is true, then the supplier's statement, that the detector is working as designed, may indeed be correct. It just may not be a very good detector. Perhaps you could find smeone else who has one for comparison.

Please let us know what you find out.

[oldchemistJohn]

MD3010-II delayed response

Thank you for your input. I did see a Utube demo of this model detector (searching on Google), and the response seemed to be almost instantaneous for that detector, thus making the slow response on mine seem to be an abnormality.

[Qiaozhi]

Thank you for your input. I did see a Utube demo of this model detector (searching on Google), and the response seemed to be almost instantaneous for that detector, thus making the slow response on mine seem to be an abnormality.

Which version do you have?
The one with a digital meter? ->
http://www.youtube.com/watch?v=jVvTcHkkAlE
Or the analog meter? -> (see towards end of video)
http://www.youtube.com/watch?v=zyq2FgIpzLs

By the way, the second one is so funny.
Look how the guy has the coil back to front!
And he seems to using it in pinpoint mode.

Where is the video that shows it beeping?

[oldchemistJohn]

Beeps?

It may have been that second one- with the pinpointing button depressed. I didn't even notice the backward coil the first time! Mine has the blue screen with boxes to show metals detected or rejected. It is funny what you miss when you have a problem of your own and compare it with others- next time I will open both eyes!

[Qiaozhi]

It may have been that second one- with the pinpointing button depressed. I didn't even notice the backward coil the first time! Mine has the blue screen with boxes to show metals detected or rejected. It is funny what you miss when you have a problem of your own and compare it with others- next time I will open both eyes!

In that case it is still possible there is a software delay between detection and beeping. Hopefully someone else here has one, or you can find a video where the detector is used in it's normal mode.

[oldchemistJohn]

MD3010-II delayed response

I have searched again on Google and found the video clip showing the (fast) response of an MD 3010-II that looks exactly the same as my unit. It is on www.youtube.com/watch?v=zyq2Fg/pzLs, under title Metal Detector Centurione Digitale Assomiglia Al Garrett Ace 250
My unit still shows a 1 second (approx) delay between passing metal in front of the centre of the coil and the response by the detector. In the video clip the response is almost immediate.

[Carl-NC]

I've tested a couple of cheap Chinese detectors, I think one was the MD3010. Both had the response delay, so I suspect it is inherent in their designs.

[Geo]

Carl, did you check the MD-88??

[Qiaozhi]

I have searched again on Google and found the video clip showing the (fast) response of an MD 3010-II that looks exactly the same as my unit. It is on www.youtube.com/watch?v=zyq2Fg/pzLs, under title Metal Detector Centurione Digitale Assomiglia Al Garrett Ace 250
My unit still shows a 1 second (approx) delay between passing metal in front of the centre of the coil and the response by the detector. In the video clip the response is almost immediate.

That link is no longer there, but here's another one -> http://www.youtube.com/watch?v=_vI5BISYMDg
It sounds to me like there's a response delay.
If you compare the MD 3010-II with the Garrett Ace 250, there are a lot of differences. The resemblance is only superficial.

[kt315]

seen this link and did bring here. unlike Garrett's conception 'we do only for usa people but people from outer space have to learn our spanglish' it seems chinese designed the detector due for russian market.
look at photos
http://www.shop-detect.ru/product_Lethrus_A250.html

[oldchemistJohn]

Another Utube showing fast response for GC 3010-II

That link is no longer there, but here's another one -> http://www.youtube.com/watch?v=_vI5BISYMDg
It sounds to me like there's a response delay.
If you compare the MD 3010-II with the Garrett Ace 250, there are a lot of differences. The resemblance is only superficial.

I found www.youtube.com/watch?v=r8Dk9eugZ3Q, and as well as the clip on phase shift, there is a clip of Lander XD100Pro Metal Detector by Evergreen Detectors. This is exactly the same as my detector,(I found a small label actually saying it is a Lander XD 100 Pro) although sold also as GC3010-II, but as you can see the response is much, much faster. On mine you would walk past the point and have to keep coming back to find where the blip originated. Mine definitely has something wrong with it after seeing this clip!