Problem with defective board

I don't own one of these units, and don't know Yuriy, but I do have a background in electrical engineering and software. Everything he's saying is exactly correct. I don't see anything in his responses that is exaggerated or played down; he's just stating facts. He has no control over whatever signal processing is done upstream of his product. It's just the nature of any digital-based sensor, that there will always be a potential one LSB (Least Significant Digit) bobble.

There's the scale itself, a sensor, and possibly inboard signal processing. The key thing to understand is how digital values are handled. If the sensor sees a scale reading of 1.999999", it will be outputting a reading of 1.999. If the sensor in the scale sees a shift of only one millionth of an inch, the output will change to 2.000. So, to the user, it may appear that the reading is "jumping all over the place", when in fact it's only changing by one millionth of an inch. That said, if it's jumping far more, then as Yuriy suggests, that may be due to a problem within the sensor assembly itself. The easy way to find out is to swap the X and Y sensor cables on the display to see if the problem follows the sensor, or doesn't. That's the "divide and conquer" method of troubleshooting.
 
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kb58 said:
I don't own one of these units, and don't know Yuriy, but I do have a background in electrical engineering and software. Everything he's saying is exactly correct. I don't see anything in his responses that is exaggerated or played down; he's just stating facts. He has no control over whatever signal processing is done upstream of his product. It's just the nature of any digital-based sensor, that there will always be a potential one LSB (Least Significant Digit) bobble.

There's the scale itself, a sensor, and possibly inboard signal processing. The key thing to understand is how digital values are handled. If the sensor sees a scale reading of 1.999999", it will be outputting a reading of 1.999 to the display. If the sensor in the scale sees a shift of only one millionth of an inch, the output will change to 2.000. So, to the user, it may appear that the reading is "jumping all over the place", when in fact it's only changing by one millionth of an inch. That said, if it's jumping far more, then as Yuriy suggests, that may be due to a problem within the sensor assembly itself. The easy way to find out is to swap the X and Y sensor cables on the display to see if the problem follows the sensor, or doesn't. That's the "divide and conquer" method of troubleshooting.
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Yep, I also agree, though as a software engineer (though one who hooked up his ebay-scales to an O-scope at one point). The signal that the scales send is noisy!

That said, it seems above the OP mentioned that the range is actually about 3 thou. I could definitely imagine that his scale is interpolating pretty poorly (as mine are :/), but a 3 thou jump seems bad.
 
If I'm going to be replacing the scale, I don't see a point in keeping the thing. This was supposed to be easy and instead I have never been this frustrated my whole life. With the time and money I wasted on it the TouchDRO is still not working and jumping all over the place. I don't even see a point of TouchDRO if it can't display the position from the scale. What's the big idea? I don't care about touch screen or the features. I just need to see where my spindle is. Unless someone convinces me that it has some redeeming qualities, I'm going to chuck it into the bin and get a real DRO with real support that can read real scales.
Kev.
 
kevinismo said:
If I'm going to be replacing the scale, I don't see a point in keeping the thing. This was supposed to be easy and instead I have never been this frustrated my whole life. With the time and money I wasted on it the TouchDRO is still not working and jumping all over the place. I don't even see a point of TouchDRO if it can't display the position from the scale. What's the big idea? I don't care about touch screen or the features. I just need to see where my spindle is. Unless someone convinces me that it has some redeeming qualities, I'm going to chuck it into the bin and get a real DRO with real support that can read real scales.
Kev.
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The problem you have is likely just what you get out of a poor-resolution scale, I think that is just about it. I don't know anything about the TouchDRO, but I'd imagine you would have the same problem with a "Real DRO", though the scales might have a better resolution (and thus do it at a lower amount of 'movement').
 
So let me see if I have this straight, Kev. Yuriy spends a long time trying to help you, going way above and beyond the call in offering all sorts of ways to determine the problem. He finally proves that it's not his product, but your scale, that particular scale.

Yet you end up bad mouthing his product anyway and now you're taking your ball and going home. Sounds like a win for Yuriy and now you'll be someone else's problem customer.
 
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