| Author |
Message |
Watson A.Name - \"Watt Su
Guest
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 Posted:
Sat Apr 09, 2005 3:10 pm Post subject:
Re: wire size question |
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<LenAnderson@ieee.org> wrote in message
news:1112985620.147867.306410@g14g2000cwa.googlegroups.com...
| Quote: | From: "Henry Kolesnik" on Thurs,Apr 7 2005 10:15 pm
Get a nice piece of smooth round rod and tightly wind a little over a
lineal
inch of wire closely spaced as possible. Count the turns in one inch
and
divide the number of turns into one inch and you'll have a very good
measurement without any cost.
73
Hank WD5JFR
Albert> wrote in message
news:0s8b5190savvispr1ga5he5hih23dgm41k@4ax.com...
Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire
and
some #30 for a coil, but have to be sure regarding the wire
diameter
as it's a critical ap and the author of the article says 'don't
substitute'.
I know I can weigh it, provided it's not on a spool or motor
winding
already.
My local electrical shop has a wire gauge, but it stops at 18
gauge.
A microscope might work, but ones that have calibrated distance
measuring on the eyepiece are expensive.
Perhaps a milliohm meter might be able to measure the difference in
resistance of a foot of it or so, but that's hardly a standard item
either.
Any suggestions?
A non-destructive measurement is best. Along about
1946 my middle school (we called it "junior high" back
then) electric shop instructor demonstrated how to use
a mechanical caliper and how NOT to squeeze too hard in
doing so. Soft-drawn copper common to wire is fairly
easy to squash when using a caliper. Using one requires
a VERY light touch on the wire, just enough to be able
to pull it slightly through the caliper jaws. Even so,
pulling on soft-drawn copper wire is going to distort it
slightly so the measurement is going to be on the small
side. Snipping off ten or twenty short lengths, then
measuring the total width and dividing by the number of
lengths will be a bit better in accuracy.
|
HUH? What do you mean, Jellybean?
[snip]
| Quote: | Just some practical thoughts after doing a bit of
winding in my time...
|
Uh, yeah...
> LenAnderson@ieee.org
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John Woodgate
Guest
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| Posted:
Sat Apr 09, 2005 3:10 pm Post subject:
Re: wire size question |
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I read in sci.electronics.design that "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote (in
<115ffk78ocf354d@corp.supernews.com>) about 'wire size question', on
Sat, 9 Apr 2005:
| Quote: | I don't believe anyone uses vernier calipers anymore. I've got a
Helios dial caliper made a long time ago in Deutschland, but nowadays a
caliper with a LCD is probably a lot cheaper.
|
In UK, you can get vernier calipers for around GBP1 (and mine check out
as quite sufficiently accurate). LCD calipers are about GBP35.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk |
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Pooh Bear
Guest
|
| Posted:
Sat Apr 09, 2005 3:10 pm Post subject:
Re: wire size question |
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"Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:
| Quote: | "Ian Stirling" <root@mauve.demon.co.uk> wrote in message
news:4255a86c$0$94508$ed2619ec@ptn-nntp-reader01.plus.net...
In sci.electronics.design Albert <> wrote:
Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire
and
some #30 for a coil, but have to be sure regarding the wire diameter
as it's a critical ap and the author of the article says 'don't
substitute'.
Micrometer.
Vernier caliper may also work.
Either under $30US.
I don't believe anyone uses vernier calipers anymore. I've got a Helios
dial caliper made a long time ago in Deutschland, but nowadays a caliper
with a LCD is probably a lot cheaper.
|
Ohhh... I assumed anyone serious would be using a Mitotuyo ? digital LCD
vernier caliper anyway. We certainly have one.
Graham
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Spehro Pefhany
Guest
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| Posted:
Sat Apr 09, 2005 3:10 pm Post subject:
Re: wire size question |
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On Sat, 9 Apr 2005 12:57:50 +0100, the renowned John Woodgate
<jmw@jmwa.demon.contraspam.yuk> wrote:
| Quote: | I read in sci.electronics.design that "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote (in
115ffk78ocf354d@corp.supernews.com>) about 'wire size question', on
Sat, 9 Apr 2005:
I don't believe anyone uses vernier calipers anymore. I've got a
Helios dial caliper made a long time ago in Deutschland, but nowadays a
caliper with a LCD is probably a lot cheaper.
In UK, you can get vernier calipers for around GBP1 (and mine check out
as quite sufficiently accurate). LCD calipers are about GBP35.
|
You can get low-end LCD calipers in the US for the equivalent of about
GPB8 plus tax. For GPB1 (<$1.99) I think you'd get some stamped or
plastic item that would only be good to 0.01".
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com |
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John Woodgate
Guest
|
| Posted:
Sat Apr 09, 2005 3:10 pm Post subject:
Re: wire size question |
|
|
I read in sci.electronics.design that Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote (in
<pmlf51liibpc341vr755mj6ts5en80g93r@4ax.com>) about 'wire size
question', on Sat, 9 Apr 2005:
| Quote: | You can get low-end LCD calipers in the US for the equivalent of about
GPB8 plus tax. For GPB1 (<$1.99) I think you'd get some stamped or
plastic item that would only be good to 0.01".
|
No, they are metal, and claim to measure to 0.001 inch, 0.02 mm. I've
checked mine against a good micrometer and it's as accurate as I can
read the vernier. YCCMV, of course.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk |
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Watson A.Name - \"Watt Su
Guest
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| Posted:
Sat Apr 09, 2005 6:10 pm Post subject:
Re: wire size question |
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"John Woodgate" <jmw@jmwa.demon.contraspam.yuk> wrote in message
news:pDZu4uN+M8VCFwfX@jmwa.demon.co.uk...
| Quote: | I read in sci.electronics.design that "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote (in
115ffk78ocf354d@corp.supernews.com>) about 'wire size question', on
Sat, 9 Apr 2005:
I don't believe anyone uses vernier calipers anymore. I've got a
Helios dial caliper made a long time ago in Deutschland, but nowadays
a
caliper with a LCD is probably a lot cheaper.
In UK, you can get vernier calipers for around GBP1 (and mine check
out |
For that cheap, you probably get plastic!
http://www.widgetsupply.com/page/WS/PROD/caliper-vernier/BET07
| Quote: | as quite sufficiently accurate). LCD calipers are about GBP35.
|
These look like a good deal on your side of the pond.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=20766&item=436984
3430&rd=1
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Gary S.
Guest
|
| Posted:
Sat Apr 09, 2005 6:10 pm Post subject:
Re: wire size question |
|
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On Sat, 9 Apr 2005 16:47:43 +0100, John Woodgate
<jmw@jmwa.demon.contraspam.yuk> wrote:
The link was too long and got broken.
Much better to enclose all links in <> brackets, which will still work
right even if split/word-wrapped into multiple lines. Works with all
of the browsers I have used.
For example:
<http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=20766&item=4369843430&rd=1>
for the item above, which works as Watson intended.
There are also options like tinyurl, but some do not trust that.
Happy trails,
Gary (net.yogi.bear)
--
At the 51st percentile of ursine intelligence
Gary D. Schwartz, Needham, MA, USA
Please reply to: garyDOTschwartzATpoboxDOTcom |
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John Woodgate
Guest
|
| Posted:
Sat Apr 09, 2005 6:10 pm Post subject:
Re: wire size question |
|
|
I read in sci.electronics.design that "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote (in
<115ftnqkcvc5j10@corp.supernews.com>) about 'wire size question', on
Sat, 9 Apr 2005:
No longer there.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk |
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Michael
Guest
|
| Posted:
Sat Apr 09, 2005 6:10 pm Post subject:
Re: wire size question |
|
|
LenAnderson@ieee.org wrote:
(snip)
| Quote: | pulling on soft-drawn copper wire is going to distort it
slightly so the measurement is going to be on the small
side. Snipping off ten or twenty short lengths, then
measuring the total width and dividing by the number of
lengths will be a bit better in accuracy.
(snip) |
Really? Hmmmm ... |
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| Back to top |
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Watson A.Name - \"Watt Su
Guest
|
| Posted:
Sat Apr 09, 2005 6:10 pm Post subject:
Recording Tape Mfgr Closed (was Re: wire size question |
|
|
"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:4257C630.666DAD8C@hotmail.com...
| Quote: | "Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:
Albert> wrote in message
news:0s8b5190savvispr1ga5he5hih23dgm41k@4ax.com...
Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire
and
some #30 for a coil, but have to be sure regarding the wire
diameter
as it's a critical ap and the author of the article says 'don't
substitute'.
I know I can weigh it, provided it's not on a spool or motor
winding
already.
My local electrical shop has a wire gauge, but it stops at 18
gauge.
A microscope might work, but ones that have calibrated distance
measuring on the eyepiece are expensive.
Perhaps a milliohm meter might be able to measure the difference
in
resistance of a foot of it or so, but that's hardly a standard
item
either.
Any suggestions?
I use either a dial calipers or a micrometer. But then the
insulation
can make it sizeably larger than the value given in the wire tables.
The wire tables have a column which gives 'ohms per 1000 ft' which
is
just another way of saying milliohms per foot. So if you measure
ten
feet of 30 AWG it should measure 1.04 ohms. My cheap meter test
leads
are something like .4 ohms, so it's really difficult to get any
accuracy
at that low a resistance. I have a Leeds Northrup wheatstone
bridge,
and it's not very good either at that low a resistance. So I put
the
wire or whatever on a power supply and crank up the current to a
quarter
amp, and then measure the V drop and calculate the resistance from
that.
I use that trick too. The only sensible way to measure a coil's
winding R. |
Long as it doesn't start glowing red. ;-)
Probably not such a good idea for measuring the series R of inductors.
Unless you run a Hi Power tape demagnetizer over it when you're done..
BTW, speaking of tapes.. I read that the company that made Irish and
Ampex tape has closed. Looks like everyone has been going to CD-Rs.
http://members4.boardhost.com/culturama/msg/3217.html
> Graham |
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Watson A.Name - \"Watt Su
Guest
|
| Posted:
Sat Apr 09, 2005 6:10 pm Post subject:
Re: wire size question |
|
|
"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:4257C753.8258F88D@hotmail.com...
| Quote: |
"Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:
"Ian Stirling" <root@mauve.demon.co.uk> wrote in message
news:4255a86c$0$94508$ed2619ec@ptn-nntp-reader01.plus.net...
In sci.electronics.design Albert <> wrote:
Does anyone know how to measure or determine the wire size. I
have
tons of motors, solenoids, and similar items. I need some #24
wire
and
some #30 for a coil, but have to be sure regarding the wire
diameter
as it's a critical ap and the author of the article says 'don't
substitute'.
Micrometer.
Vernier caliper may also work.
Either under $30US.
I don't believe anyone uses vernier calipers anymore. I've got a
Helios
dial caliper made a long time ago in Deutschland, but nowadays a
caliper
with a LCD is probably a lot cheaper.
Ohhh... I assumed anyone serious would be using a Mitotuyo ? digital
LCD
vernier caliper anyway. We certainly have one.
|
I'm trying to figure out why they would be called vernier when they have
a LCD display.
> Graham |
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| Back to top |
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Watson A.Name - \"Watt Su
Guest
|
| Posted:
Sat Apr 09, 2005 6:10 pm Post subject:
Re: wire size question |
|
|
"Spehro Pefhany" <speffSNIP@interlogDOTyou.knowwhat> wrote in message
news:pmlf51liibpc341vr755mj6ts5en80g93r@4ax.com...
| Quote: | On Sat, 9 Apr 2005 12:57:50 +0100, the renowned John Woodgate
jmw@jmwa.demon.contraspam.yuk> wrote:
I read in sci.electronics.design that "Watson A.Name - \"Watt Sun,
the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote (in
115ffk78ocf354d@corp.supernews.com>) about 'wire size question', on
Sat, 9 Apr 2005:
I don't believe anyone uses vernier calipers anymore. I've got a
Helios dial caliper made a long time ago in Deutschland, but
nowadays a
caliper with a LCD is probably a lot cheaper.
In UK, you can get vernier calipers for around GBP1 (and mine check
out
as quite sufficiently accurate). LCD calipers are about GBP35.
You can get low-end LCD calipers in the US for the equivalent of about
GPB8 plus tax. For GPB1 (<$1.99) I think you'd get some stamped or
plastic item that would only be good to 0.01".
|
Zackly. The ones I've seen in stores don't go down to a thousandth.
Not to mention the jaws probably wear and/or get dimpled by the sharp
edges of objects, ruining the accuracy.
But at two bucks apiece, you just treat them as disposable and discard
them at the end of the day. ;-)
Unless, of course, you're a plastic surgeon using them to measure the
results of your liposuction machine. ;-))
|
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Watson A.Name - \"Watt Su
Guest
|
| Posted:
Sat Apr 09, 2005 6:10 pm Post subject:
Re: wire size question |
|
|
"Michael" <NoSpam@att.net> wrote in message
news:4257FBA6.B84FD22F@att.net...
| Quote: | LenAnderson@ieee.org wrote:
(snip)
pulling on soft-drawn copper wire is going to distort it
slightly so the measurement is going to be on the small
side. Snipping off ten or twenty short lengths, then
measuring the total width and dividing by the number of
lengths will be a bit better in accuracy.
(snip)
Really? Hmmmm ...
|
Bumfuzzles me why you'd want to cut it up into a bunch of hard-to-handle
strands. Just wind it around a dowel as someone else suggested. |
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Spehro Pefhany
Guest
|
| Posted:
Sat Apr 09, 2005 9:10 pm Post subject:
Re: wire size question |
|
|
On 09 Apr 2005 20:52:54 GMT, the renowned Ian Stirling
<root@mauve.demon.co.uk> wrote:
| Quote: | In sci.electronics.design Spehro Pefhany <speffSNIP@interlogdotyou.knowwhat> wrote:
On 09 Apr 2005 18:32:49 GMT, the renowned Ian Stirling
root@mauve.demon.co.uk> wrote:
In sci.electronics.design "Watson A.Name - \"Watt Sun, the Dark Remover\"" <NOSPAM@dslextreme.com> wrote:
"Ian Stirling" <root@mauve.demon.co.uk> wrote in message
news:4255a86c$0$94508$ed2619ec@ptn-nntp-reader01.plus.net...
In sci.electronics.design Albert <> wrote:
Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire
and
some #30 for a coil, but have to be sure regarding the wire diameter
as it's a critical ap and the author of the article says 'don't
substitute'.
Micrometer.
Vernier caliper may also work.
Either under $30US.
I don't believe anyone uses vernier calipers anymore. I've got a Helios
dial caliper made a long time ago in Deutschland, but nowadays a caliper
with a LCD is probably a lot cheaper.
I do.
I haven't got a LCD one, but a magazine sends me one every year.
Ok, it's made of plastic, but it works fine, and is accurate enough for
me, seeming to be within about .05mm
I'd like an LCD one of course.
You should shell out the $20 or whatever then (or $100 and get a
Mitutoyo or other brand name with a bit better "feel"). I use mine all
the time- for rough (0.001") width, diameter, inside diameter
(rougher) and depth measurements. A micrometer is useful for precision
measurements, but less necessary for an EE.
Unfortunately, $20 is quite a lot of money at the moment :/
|
Mm.. 'kay. Hope things get better fast for you.
| Quote: | I don't have any real need for it - I've got a 0-25mm micrometer, and
the plastic caliper fills in for the rest.
I don't have any tools that can maintain that sort of tollerance anyway,
so my need is less.
|
You don't have a file? ;-) Just double-checking lead pitch etc. is
worth a lot by times.
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com |
|
| Back to top |
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Ian Stirling
Guest
|
| Posted:
Sat Apr 09, 2005 9:10 pm Post subject:
Re: wire size question |
|
|
In sci.electronics.design Spehro Pefhany <speffSNIP@interlogdotyou.knowwhat> wrote:
| Quote: | On 09 Apr 2005 18:32:49 GMT, the renowned Ian Stirling
root@mauve.demon.co.uk> wrote:
In sci.electronics.design "Watson A.Name - \"Watt Sun, the Dark Remover\"" <NOSPAM@dslextreme.com> wrote:
"Ian Stirling" <root@mauve.demon.co.uk> wrote in message
news:4255a86c$0$94508$ed2619ec@ptn-nntp-reader01.plus.net...
In sci.electronics.design Albert <> wrote:
Does anyone know how to measure or determine the wire size. I have
tons of motors, solenoids, and similar items. I need some #24 wire
and
some #30 for a coil, but have to be sure regarding the wire diameter
as it's a critical ap and the author of the article says 'don't
substitute'.
Micrometer.
Vernier caliper may also work.
Either under $30US.
I don't believe anyone uses vernier calipers anymore. I've got a Helios
dial caliper made a long time ago in Deutschland, but nowadays a caliper
with a LCD is probably a lot cheaper.
I do.
I haven't got a LCD one, but a magazine sends me one every year.
Ok, it's made of plastic, but it works fine, and is accurate enough for
me, seeming to be within about .05mm
I'd like an LCD one of course.
You should shell out the $20 or whatever then (or $100 and get a
Mitutoyo or other brand name with a bit better "feel"). I use mine all
the time- for rough (0.001") width, diameter, inside diameter
(rougher) and depth measurements. A micrometer is useful for precision
measurements, but less necessary for an EE.
|
Unfortunately, $20 is quite a lot of money at the moment :/
I don't have any real need for it - I've got a 0-25mm micrometer, and
the plastic caliper fills in for the rest.
I don't have any tools that can maintain that sort of tollerance anyway,
so my need is less. |
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