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November 20th, 2017, 11:58 AM #41Super Member
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Re: Electronic (digital) scales. I've given up on them.
Like John Bigboote would do.
https://www.bing.com/videos/search?q...BAE3&FORM=VIRE
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November 20th, 2017, 01:24 PM #42
Re: Electronic (digital) scales. I've given up on them.
"It seems that the Constitution is more or less guidelines than actual rules"
My feedback: http://forum.pafoa.org/showthread.php?t=305685
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November 21st, 2017, 02:04 AM #43
Re: Electronic (digital) scales. I've given up on them.
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November 21st, 2017, 07:48 PM #44
Re: Electronic (digital) scales. I've given up on them.
I got a working load cell in the mail today, took the slow rickshaw from china to get here.
It's much larger than the dead loadcell behind it, not accurate enough for reloading, but at least it proves that the program and the interface works.
I haven't read through the actual program yet to determine what the numbers mean. I'm guessing that it's actual resistance of the load cell, which would then need to be converted into grams, grains, kilograms or whatever. You can see how the cell changed when I was putting pressure on it.Rules are written in the stone,
Break the rules and you get no bones,
all you get is ridicule, laughter,
and a trip to the house of pain.
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November 24th, 2017, 01:34 PM #45
Re: Electronic (digital) scales. I've given up on them.
I'm not sure if you guys realize the truth when you said "if you breathe on the scale it changes". I've just found the actual reason for that, yes, breathing on the scale actually does change the zero. But it's not the load cell, it's the Op-Amp that's causing it. Just breathing warm air on the op-amp changed the zero significantly.
Rules are written in the stone,
Break the rules and you get no bones,
all you get is ridicule, laughter,
and a trip to the house of pain.
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November 24th, 2017, 02:07 PM #46Super Member
- Join Date
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'burbs,
Pennsylvania
(Bucks County) - Posts
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November 24th, 2017, 05:13 PM #47
Re: Electronic (digital) scales. I've given up on them.
More progress.
I got the load cell mounted to a block so it actually does function as a scale. The output of the load cell is displayed on the LCD screen and there's a "zero" button. The OP-Amp is definitely temperature sensitive, and it really didn't like starting up in the cold garage, it took a while before it stabilized internally and started giving consistent readings.Rules are written in the stone,
Break the rules and you get no bones,
all you get is ridicule, laughter,
and a trip to the house of pain.
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November 24th, 2017, 09:26 PM #48
Re: Electronic (digital) scales. I've given up on them.
My 20yrs old PACT digital scale was going nuts , and driving me the same till I realized I needed to TURN THE CEILING FAN OFF!
I don't speak English , I talk American!
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November 25th, 2017, 04:15 PM #49
Re: Electronic (digital) scales. I've given up on them.
A little more progress today, I figured out the calibration process, right now it's manual, but I'm certain I can make it automatic.
I also added a platform for the weight just so that it's easier to test with. Had to find the right kind of screws for that, I don't have a big selection of metric hardware on hand. The nut and bolt that's on the scale right now weighs 22grams according to another scale I have.
When you guys are weighing in grains, how many decimal places are you measuring?Rules are written in the stone,
Break the rules and you get no bones,
all you get is ridicule, laughter,
and a trip to the house of pain.
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November 25th, 2017, 07:27 PM #50
Re: Electronic (digital) scales. I've given up on them.
We're only measuring to the nearest 0.1 gr. I think more precise than that (0.01 or even nearest 0.05) would really be superfluous.
"Those who can make you believe absurdities can make you commit atrocities".
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