02GF74
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| posted on 1/12/06 at 02:16 PM |
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making scales to measure 1 or 2 g
I need to make a small scales to set up tracking wieght of a cartridge fitted to a tone arm.
thinking of a balance type thing, a length of small brass tube pivoting with a wieght that slides along it; using the ratio of arm lengths would be
give me an idea of wieght .... but I need to have an item of know weight as the sliding weight.
Anyon able to weigh a 5 p piece accurately?
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graememk
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| posted on 1/12/06 at 02:29 PM |
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just go to the market and the local hippy stall has digital scales that do that sort of thing, not sure what they use them for though
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02GF74
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| posted on 1/12/06 at 02:29 PM |
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well I'd suggest you take the scales back and ask for your money back.
If you measured say 10 of them and took average, you may get closer but as it is your 23 % out 
see here for 5 p coin
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Peteff
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| posted on 1/12/06 at 02:43 PM |
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1p weighs 1/8th oz which is 3.56gm
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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RazMan
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| posted on 1/12/06 at 03:49 PM |
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So crack dealers are shopping at John Lewis these days?  
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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Fatgadget
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| posted on 1/12/06 at 04:09 PM |
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quote:
Originally posted by RazMan
So crack dealers are shopping at John Lewis these days?
For some reason I knew a smart ar5e would sneak this one in!
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dave r
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| posted on 1/12/06 at 06:40 PM |
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quote:
Originally posted by Peteff
1p weighs 1/8th oz which is 3.56gm
2p weighs 1/4 oz
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Johnmor
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| posted on 1/12/06 at 11:06 PM |
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milligram
Am i right in thinking a milligram = 1000th of a gram.
400 g = 1lb
400,000 mg in a lb
if 5p = 4milligrams, then 100,000 5p =1lb
dont think so
Maybe , 4g there fore 100 5ps = 1lb
Ahh thats more like it
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Dusty
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| posted on 2/12/06 at 12:14 AM |
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I make it 137 but I'm cheating by weighing some out of my piggy bank. Nuts to theory and maths. Suck it and see!
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lexi
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| posted on 2/12/06 at 06:01 PM |
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Them scales are used by guys making biodiesel to weigh out Sodium Hydroxide. Is it a Locost tonearm?
Alex
Please Note........Bollocks!
[Edited on 2/12/06 by lexi]
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02GF74
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| posted on 4/12/06 at 09:58 AM |
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quote:
Originally posted by lexi
Them scales are used by guys making biodiesel to weigh out Sodium Hydroxide. Is it a Locost tonearm?
[Edited on 2/12/06 by lexi]
quite the opposite - it is a Zeta; but there are no weight markings on the counter balance so it is guess works as for tracking, unless you have a
smll balance that is
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greggors84
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| posted on 4/12/06 at 06:05 PM |
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How about set it to balance equal, then rest a 5p on the cart? Unless its a fancy shaped one.
Maybe instead of 5 milligrams the scale read 5 milli-kilograms!
Chris
The Magnificent 7!
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02GF74
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| posted on 5/12/06 at 09:39 AM |
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quote:
Originally posted by greggors84
How about set it to balance equal, then rest a 5p on the cart? Unless its a fancy shaped one.
Maybe instead of 5 milligrams the scale read 5 milli-kilograms!
that is the smart way of doing it  except it is on the other end , and it would be a 2 1/2 p coin for a tracking weight of about 1.5 g.
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NS Dev
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| posted on 6/12/06 at 01:07 PM |
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interestingly (or maybe not!) most of our coin of the realm is now worth more as scrap than coin!!!
good ol' china eh!
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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greggors84
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| posted on 6/12/06 at 04:46 PM |
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Off to the bank!
And then to the scrap merchants!
Chris
The Magnificent 7!
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