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Post by riton39 on Dec 9, 2016 23:27:51 GMT
The ground of the USB cable is good? On each side of the USB cable?
The earth is correct on the wall outlet?
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Post by riton39 on Dec 10, 2016 12:07:59 GMT
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gokhan
Junior Member
Posts: 89
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Post by gokhan on Dec 10, 2016 17:03:31 GMT
can I see a picture of your AMC box and the wiring? best quality image to see in details the wiring You must have a problem with wiring, if I manage to reduce my parasites, you must also be able to reduce your noise what is the division with Volts in your oscilloscope ? 0.5v ? 1 V All the chasis are good. Usb, box, etc. All cables are shielded and all of them are connected to the same chasis/ground. I ran a new ground cable and put proper grounding sticks in the earth outside the building, since the existing ground was quite bad. Now it is very good. Here is the photo. You can see existing axis settings(1 volts, 20 msecs)
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gokhan
Junior Member
Posts: 89
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Post by gokhan on Dec 10, 2016 17:07:23 GMT
I think the noise i am seeing is normal and minimal. I started to think that it comes from the probes of my oscillator, since none of the capacitors have any effect what so ever. Any thoughts?
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Post by riton39 on Dec 10, 2016 17:57:51 GMT
You have 2 volts per tile of noise amplitude? true ? it's really important ! Me, I have 0.5v per tile, and the noise does not exceed the trait is almost nothing
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gokhan
Junior Member
Posts: 89
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Post by gokhan on Dec 10, 2016 18:16:42 GMT
What do you think of condensators not having any effect?
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Post by riton39 on Dec 11, 2016 9:21:42 GMT
think you need to solder the capacitors and screw them into the terminal blocks To visualize the difference and their actions.
You have 2 volts per tile of noise amplitude? true ?
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gokhan
Junior Member
Posts: 89
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Post by gokhan on Dec 11, 2016 9:59:25 GMT
think you need to solder the capacitors and screw them into the terminal blocks To visualize the difference and their actions. You have 2 volts per tile of noise amplitude? true ? The screen of osc is 8v total, every square is 1v high. So the noise at peak has roughly 1.8v amplitude. I solder the caps to pin sockets and mount the socket to the extra 5v and ground pins. If you think this is not good enough can you elaborate why?
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Post by riton39 on Dec 11, 2016 10:18:40 GMT
Yes, that's about what I read. Therefore, it is far too much.
I have 0.5V per division, and the noise does not exceed the line, I have some milivolt / microvolt amplitude.
You have a big margin of progression.
You must arrive at my result.
As long as you have this noise, you will not be able to have a good result.
Can you give me a picture of your AMC box, your wiring, with the probe of the oscilloscope connected.
Between the 5V and the potentiometer ground? If it is welded or screwed to the terminal board, it is good.
To avoid the noise, I would put the capacitors between the ground and the variation of the potentiometer 5V white wire , RED is +5V and Black the ground. May be 100 nF.
Thanos your opinion? My English is not very good, I would like to be on to understand correctly and give a correct explanation
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gokhan
Junior Member
Posts: 89
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Post by gokhan on Dec 11, 2016 10:25:12 GMT
Yes, that's about what I read. Therefore, it is far too much. I have 0.5V per division, and the noise does not exceed the line, I have some milivolt / microvolt amplitude. You have a big margin of progression. You must arrive at my result. As long as you have this noise, you will not be able to have a good result. Can you give me a picture of your AMC box, your wiring, with the probe of the oscilloscope connected. Between the 5V and the potentiometer ground? If it is welded or screwed to the terminal board, it is good. To avoid the noise, I would put the capacitors between the ground and the variation of the potentiometer 5V white wire , RED is +5V and Black the ground. May be 100 nF. Thanos your opinion? My English is not very good, I would like to be on to understand correctly and give a correct explanation Here is a picture I took yesterday. I double check the wiring and I believe the noise is coming from the osc probe. I will get nF caps this week and try them. I will let you know of the result. Thanks for your support.
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Post by riton39 on Dec 11, 2016 10:36:05 GMT
All the black lines are connections with the mass. The multimeter must indicate 000 in continuity no resistance. thanks I look at your wiring ...
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Post by riton39 on Dec 11, 2016 11:01:03 GMT
There are a lot of wires on the mass of the extention card
Normally: 2-wire for direction of rotation white / brown A mass, I see yellow and gray The 0 ... 10v analog I see a green
All these wires must be in a cable, and around the ground, the shielding. Correct?
I do not see the plug properly.
and of course Identical for the potentiometer
The brown connection wire on the box is the mass I think?
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Post by riton39 on Dec 11, 2016 11:04:00 GMT
Where is the 24V power supply?
You should try putting the 24V power supply into the AMC box.
Is the small 24v power supply like mine?
The parasites may pass through the 24V power supply?
Normally no, the probe of the oscillo brings the noise of the circuit.
The oscilloscope ground is common with the ground of the circuit?
And with the ground of the whole installation?
It really looks like a mass problem ...
I'm not sure, but I had that before when the mass of USB was bad
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gokhan
Junior Member
Posts: 89
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Post by gokhan on Dec 11, 2016 11:57:15 GMT
There are a lot of wires on the mass of the extention card Normally: 2-wire for direction of rotation white / brown A mass, I see yellow and gray The 0 ... 10v analog I see a green All these wires must be in a cable, and around the ground, the shielding. Correct? YES I do not see the plug properly. FULL METAL PLUGS THEY ARE GROUNDED and of course Identical for the potentiometer SAME The brown connection wire on the box is the mass I think? YES
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gokhan
Junior Member
Posts: 89
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Post by gokhan on Dec 11, 2016 12:00:19 GMT
Where is the 24V power supply? You should try putting the 24V power supply into the AMC box. Is the small 24v power supply like mine? The parasites may pass through the 24V power supply? I REPLACED THE POWER SUPPLY WITH A BENCHTOP POWER SUPPLY. IT IS ALSO GROUNDED AND GROUNDS ARE CONNECTED TOO. Normally no, the probe of the oscillo brings the noise of the circuit. The oscilloscope ground is common with the ground of the circuit? And with the ground of the whole installation? VIA THE GROUND IN POWER CONNECTION It really looks like a mass problem ... I'm not sure, but I had that before when the mass of USB was bad
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