Monday, March 22, 2010

rec.crafts.metalworking - 25 new messages in 13 topics - digest

rec.crafts.metalworking
http://groups.google.com/group/rec.crafts.metalworking?hl=en

rec.crafts.metalworking@googlegroups.com

Today's topics:

* Why do razor blades get dull so fast? - 2 messages, 2 authors
http://groups.google.com/group/rec.crafts.metalworking/t/d0ab1ef54b638ce4?hl=en
* Surface Plates - 1 messages, 1 author
http://groups.google.com/group/rec.crafts.metalworking/t/bc2625a5c4711576?hl=en
* Republican losing streak continues - 1 messages, 1 author
http://groups.google.com/group/rec.crafts.metalworking/t/acd15706db55f813?hl=en
* Who will be the first? - 5 messages, 4 authors
http://groups.google.com/group/rec.crafts.metalworking/t/f434d5963fd21822?hl=en
* Speaking of aluminum cylinder bores... - 1 messages, 1 author
http://groups.google.com/group/rec.crafts.metalworking/t/0529ed0b59765e57?hl=en
* Am I a fool to buy this mill/drill? - 1 messages, 1 author
http://groups.google.com/group/rec.crafts.metalworking/t/a1b543030985642c?hl=en
* Let the great culling begin. - 2 messages, 2 authors
http://groups.google.com/group/rec.crafts.metalworking/t/aadf2d185ee7a12a?hl=en
* If George Bush........ - 2 messages, 2 authors
http://groups.google.com/group/rec.crafts.metalworking/t/ee503716cb3ad0d5?hl=en
* DIY surge protection... - 4 messages, 2 authors
http://groups.google.com/group/rec.crafts.metalworking/t/fa560b93f2504a9b?hl=en
* Working class - 2 messages, 2 authors
http://groups.google.com/group/rec.crafts.metalworking/t/facb62633a2f2005?hl=en
* Would you buy a new Toyota? - 2 messages, 2 authors
http://groups.google.com/group/rec.crafts.metalworking/t/92b2cda20b50e86b?hl=en
* A littel help, please . . . - 1 messages, 1 author
http://groups.google.com/group/rec.crafts.metalworking/t/50f1536cf33d9775?hl=en
* Big electric motors and little VFD's - 1 messages, 1 author
http://groups.google.com/group/rec.crafts.metalworking/t/465b6cc7b79a1cce?hl=en

==============================================================================
TOPIC: Why do razor blades get dull so fast?
http://groups.google.com/group/rec.crafts.metalworking/t/d0ab1ef54b638ce4?hl=en
==============================================================================

== 1 of 2 ==
Date: Mon, Mar 22 2010 2:47 pm
From: "Snag"


Mark Rand wrote:
> On Mon, 22 Mar 2010 14:41:02 -0500, Ignoramus7894
> <ignoramus7894@NOSPAM.7894.invalid> wrote:
>
>> The short answer is the following.
>>
>> When I used Gillette blades (Mach3?), they would wear out in two
>> weeks.
>>
>> Now I use Schick Quattro blades and they last me 6 months.
>>
>> It is nothing short of amazing.
>>
>> i
>
> I use a pair of scissors to trim my beard. They don't seem to wear
> out at all. Can be sharpened with a few strokes of a stone. Only need
> using every couple of weeks as well :-)
>
>
> Mark Rand
> RTFM

I use a little battery powered clipper . I'm on my second in ...17 years I
think it is now .

--
Snag
"90 FLHTCU "Strider"
'39 WLDD "PopCycle"
BS 132/SENS/DOF


== 2 of 2 ==
Date: Mon, Mar 22 2010 3:50 pm
From: "Steve Lusardi"


If you use those shaving creams/foams/gels, they also help to erode the blade edge. It is very advantageous for the manufacturer
of the blades to have a short life. Try using normal bar soap. It lubricates much better and will double blade life.
Steve

<clarkmagnuson@gmail.com> wrote in message news:97e24b3f-353b-4b01-8265-bb2214f3019a@k24g2000pro.googlegroups.com...
> Is there some abrasive in my beard?
> Is the water corroding the edge?
>
> Could they make razors with carbide?


==============================================================================
TOPIC: Surface Plates
http://groups.google.com/group/rec.crafts.metalworking/t/bc2625a5c4711576?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Mar 22 2010 3:57 pm
From: "vinny"

"Alphonso" <alphamachine-nospam@sbcglobal.net> wrote in message
news:Xns9D43AA1AAF7C6alphonso@85.214.113.135...
>
>> Since then world has ran out of pink granite, the hardest and most
>> stable.
>> Hitler had a stadium made from it, and now everyone wants that
>> granite.
>>
>>
>
> Uh, Vinny you need to come to Marble Falls and Llano Texas: Llano Uplift.
> There's more fuckin' pink granite from there than you could ever use.
> About 8 miles north of Llano is a small dike of Llanoite that crosses
> under
> 16. The only location in the world and by some accounts the hardest
> granite known.
>

Not that I don't believe you guys, but a few years back my friend tried to
buy a starrett crystal pink, and starrett said discontinued due to supply
shortages worldwide.

==============================================================================
TOPIC: Republican losing streak continues
http://groups.google.com/group/rec.crafts.metalworking/t/acd15706db55f813?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Mar 22 2010 3:03 pm
From: Gunner Asch


On Mon, 22 Mar 2010 12:40:05 -0500, Ignoramus7894
<ignoramus7894@NOSPAM.7894.invalid> wrote:

>My own opinion, which is worth what you pay for it, it that this
>legislative victory is also a political victory for Democrats, for two
>reasons.
>
>1. This is a more minor reason, but passage of this law removes the
>factor of annoyance about uncertainty in the minds of voters and also
>shows that Democrats are capable of accomplishing a large legislative
>change. Just because the uncertainty is over, causes some relief in
>the minds of voters and that is a favorable factor.
>
>More briefly, now we cannot say that "Obama administration
>accomplished nothing".
>
>2. There is a large constituency of people, like parents of young
>adults lacking coverage, people with substandard health insurance
>policies, and so on, who would eventually realize the benefits of this
>change. When they do, they will, presumably, support its
>sponsors.
>
>Also, people like me, who have health insurance, but realize that they
>would likely lose it when they *really* need it, would also be
>favorably inclined towards it.
>
>3. The people negatively affected are those young healthy well paid
>people who have to shoulder some of the costs. While some of them
>might realize that one day they may become old and unhealthy and not
>so well paid, even if they do not, extra taxes will be a drop in the
>bucket and not a hot button issue like gun control.
>
>The healthcare reform has every potential of becoming a sacred
>political cow, like Medicare, and create a pro-Democrat constituency
>where none previously existed.
>
>Aside from elections, here's one more point that I want to make.
>
>4. As Warren Buffett pointed out, our health care costs are 14-16% of
>GDP and are much higher than for other industrialized nations, which
>badly affects our competitive standing. The healthcare law has some
>chances of reducing that percentage.
>
>i

Oh hell yes.

And then those that are forced to buy insurance will simply kill
Leftwing Extremists that have been unconstitutionaly driven to force
others to pay for someone elses insurance.

But hey...Leftwingers are going to be killed in hummm about 2 yrs, give
or take a little bit..so its a moot issue.

"First Law of Leftist Debate
The more you present a leftist with factual evidence
that is counter to his preconceived world view and the
more difficult it becomes for him to refute it without
losing face the chance of him calling you a racist, bigot,
homophobe approaches infinity.

This is despite the thread you are in having not mentioned
race or sexual preference in any way that is relevant to
the subject." Grey Ghost

==============================================================================
TOPIC: Who will be the first?
http://groups.google.com/group/rec.crafts.metalworking/t/f434d5963fd21822?hl=en
==============================================================================

== 1 of 5 ==
Date: Mon, Mar 22 2010 3:06 pm
From: Gunner Asch


On Mon, 22 Mar 2010 12:38:44 -0600, "Pete C." <aux3.DOH.4@snet.net>
wrote:

>
>Steve B wrote:
>>
>> "Occasionally the tree of Liberty must be watered with the blood of Patriots
>> and Tyrants."
>>
>> Thomas Jefferson
>
>Dude, take your meds and get back to metalworking...


The clock is indeed ticking. Despite what Leftists wish to believe.

I hope you are prepared for it.

And one assumes that you accept quotes from Mao, Trotsky, Lenin and Marx
far more than you do those of our Founders.


Pity. Have you written out a will yet? Might be time.

Gunner


"First Law of Leftist Debate
The more you present a leftist with factual evidence
that is counter to his preconceived world view and the
more difficult it becomes for him to refute it without
losing face the chance of him calling you a racist, bigot,
homophobe approaches infinity.

This is despite the thread you are in having not mentioned
race or sexual preference in any way that is relevant to
the subject." Grey Ghost


== 2 of 5 ==
Date: Mon, Mar 22 2010 3:36 pm
From: "Pete C."

Gunner Asch wrote:
>
> On Mon, 22 Mar 2010 12:38:44 -0600, "Pete C." <aux3.DOH.4@snet.net>
> wrote:
>
> >
> >Steve B wrote:
> >>
> >> "Occasionally the tree of Liberty must be watered with the blood of Patriots
> >> and Tyrants."
> >>
> >> Thomas Jefferson
> >
> >Dude, take your meds and get back to metalworking...
>
> The clock is indeed ticking. Despite what Leftists wish to believe.

Ticking and off topic.

>
> I hope you are prepared for it.

I'm prepared for most any contingency.

>
> And one assumes that you accept quotes from Mao, Trotsky, Lenin and Marx
> far more than you do those of our Founders.

None of the above actually.

>
> Pity. Have you written out a will yet? Might be time.

Wills are for people with relatives / dependents.


== 3 of 5 ==
Date: Mon, Mar 22 2010 3:37 pm
From: "Pete C."

Gunner Asch wrote:
>

<off topic snipped>

Oh yea, I've been doing quite a bit of plasma cutting, welding and
grinding lately, what have you done on-topic?


== 4 of 5 ==
Date: Mon, Mar 22 2010 3:49 pm
From: "Ed Huntress"

"Gunner Asch" <gunnerasch@gmail.com> wrote in message
news:fbqfq5pqd6sde92hgf3gp7qqglut1q969u@4ax.com...
> On Mon, 22 Mar 2010 12:38:44 -0600, "Pete C." <aux3.DOH.4@snet.net>
> wrote:
>
>>
>>Steve B wrote:
>>>
>>> "Occasionally the tree of Liberty must be watered with the blood of
>>> Patriots
>>> and Tyrants."
>>>
>>> Thomas Jefferson
>>
>>Dude, take your meds and get back to metalworking...
>
>
> The clock is indeed ticking. Despite what Leftists wish to believe.
>
> I hope you are prepared for it.
>
> And one assumes that you accept quotes from Mao, Trotsky, Lenin and Marx
> far more than you do those of our Founders.
>
>
> Pity. Have you written out a will yet? Might be time.

And when they catch your Sons of Timothy McVeigh, shall we warm up Old
Sparky, or will you settle for lethal injection?

--
Ed Huntress


== 5 of 5 ==
Date: Mon, Mar 22 2010 5:03 pm
From: Wes


"Pete C." <aux3.DOH.4@snet.net> wrote:

><off topic snipped>
>
>Oh yea, I've been doing quite a bit of plasma cutting, welding and
>grinding lately, what have you done on-topic?

I'm working on making 10 .188D x .255" long brass pins with .100" of 10/32 threads on the
end. I'm curious how deep a cut I can take to minimize my number of passes. The pins are
360 Brass.

They are cam pins for the gatling gun I'm building.

I set up a long travel dial indicator on the saddle and use it for length of threading.
I'm only using power to get the tool close to the work each pass. The cutting I'm doing
by cranking the spindle. That clutch/brake system on my 6903 is pretty handy.

I'm also damn glad I built the tooling to run 5c collets.

Now a bit of OT. November is when the culling takes place. At the ballot box. I'm not
betting on any specific outcome.

So how deep a cut can I take for each threading pass in brass? Never threaded brass
before.

Wes

==============================================================================
TOPIC: Speaking of aluminum cylinder bores...
http://groups.google.com/group/rec.crafts.metalworking/t/0529ed0b59765e57?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Mar 22 2010 3:10 pm
From: dbr@kbrx.com


Good eye, Tim.

Hul

==============================================================================
TOPIC: Am I a fool to buy this mill/drill?
http://groups.google.com/group/rec.crafts.metalworking/t/a1b543030985642c?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Mar 22 2010 4:17 pm
From: F. George McDuffee


On Mon, 22 Mar 2010 21:37:42 +0100, Tom Ivar Helbekkmo
<tih@hamartun.priv.no> wrote:
<snip>
> The spindle taper is MT2, whereas it seems most tooling
>offered out there is R8. The importer does supply a nice looking collet
>chuck in MT2, though. Possibly worse: I'm wondering if I'm going to be
>cursing that table every time I use it, because it lacks a central T
>slot...?
<snip>
#2MT spindle should not be a show stopper if this has a pull bolt
to allow #2MT collets. You will be limited to 1/2 inch dimeter
shank tooling, but again given the size of the machine this
should not be a show stopper.

One source of #2MT collets is The Litle Machine Shop.
http://littlemachineshop.com/products/product_view.php?ProductID=1752&category=
Actually you will most likely only use the 3/8 and 1/2 sizes
http://littlemachineshop.com/products/product_category.php?category=874479994

If you need a drawbar, frequently you can use a socket head cap
screw [allen bolt] of the correct size.

also ER 25 collet adapters. Drawback is the loss in spindle to
table clearence -- benefit is you can use 5/8 shank tooling.
http://littlemachineshop.com/products/product_view.php?ProductID=2230&category=
http://hhip.com/products/product_view.php?ProductID=3900-5210

You can bolt a sub plate of aluminum to your table and drill and
tap all the locating/clamping holes desired/required. One trick
here is to drill/ream for 2 dowel pins to locate the plate
parallel to the table slots without the need to indicate.

The mill drills do offer a larger work envelope, but if you do
mainly small items a milling adapter for ypur lathe, possibly
home brewed using the compound or top slide for vertical movement
will be less expensive and adequate to your needs. For one
example see
http://mcduffee-associates.us/machining/latheMilling.htm

for an econo store bought version see
http://littlemachineshop.com/products/product_view.php?ProductID=1681&category=
http://littlemachineshop.com/products/product_view.php?ProductID=2894&category=
http://littlemachineshop.com/products/product_view.php?ProductID=1956&category=

for the high priced spread see
http://www.use-enco.com/CGI/INSRIT?PMAKA=240-2941&PMPXNO=4840108&PARTPG=INLMK3
http://www.use-enco.com/CGI/INSRIT?PMAKA=240-2942&PMPXNO=4840109&PARTPG=INLMK3
or try ebay.

If you go with the lathe milling adapter you will still need a
cutter holder as a drill chuck is totally inadequate.
http://www.hhip.com/products/catalog_view.php?CatPage=93
{these are even longer than the ER25 holders}


Unka George (George McDuffee)
..............................
The past is a foreign country;
they do things differently there.
L. P. Hartley (1895-1972), British author.
The Go-Between, Prologue (1953).

==============================================================================
TOPIC: Let the great culling begin.
http://groups.google.com/group/rec.crafts.metalworking/t/aadf2d185ee7a12a?hl=en
==============================================================================

== 1 of 2 ==
Date: Mon, Mar 22 2010 3:18 pm
From: "Ed Huntress"

"rangerssuck" <rangerssuck@gmail.com> wrote in message
news:694b1b5c-6103-4740-b93f-e3fa03351baf@g28g2000yqh.googlegroups.com...
On Mar 22, 5:40 pm, "Pete C." <aux3.DO...@snet.net> wrote:
> Steve B wrote:
>
> > Looks like a big constitutional fight is brewing with lots of emotions
> > ..........
>
> > Steve
>
> Looks like you're off topic again...

>Didn't Steve make some big pronouncement of his New Year's resolution
>to refrain from this sort of crap?

Which of his personas said that?

--
Ed Huntress


== 2 of 2 ==
Date: Mon, Mar 22 2010 3:38 pm
From: "Pete C."

Ed Huntress wrote:
>
> "rangerssuck" <rangerssuck@gmail.com> wrote in message
> news:694b1b5c-6103-4740-b93f-e3fa03351baf@g28g2000yqh.googlegroups.com...
> On Mar 22, 5:40 pm, "Pete C." <aux3.DO...@snet.net> wrote:
> > Steve B wrote:
> >
> > > Looks like a big constitutional fight is brewing with lots of emotions
> > > ..........
> >
> > > Steve
> >
> > Looks like you're off topic again...
>
> >Didn't Steve make some big pronouncement of his New Year's resolution
> >to refrain from this sort of crap?
>
> Which of his personas said that?

#3 I think... or perhaps it was #2...

==============================================================================
TOPIC: If George Bush........
http://groups.google.com/group/rec.crafts.metalworking/t/ee503716cb3ad0d5?hl=en
==============================================================================

== 1 of 2 ==
Date: Mon, Mar 22 2010 4:23 pm
From: "vinny"

"Gunner Asch" <gunnerasch@gmail.com> wrote in message
news:amleq513qh8u0qbl4lgme18amevgo4j0tm@4ax.com...
> If George W. Bush had been the first President to need a teleprompter
> installed to be able to get through a press conference, would you have
> laughed and said this is more proof of how he inept he is on his own and
> is really controlled by smarter men behind the scenes?
>
> If George W. Bush had spent hundreds of thousands of dollars to take
> Laura Bush to a play in NYC, would you have approved?
>
>
> If George W. Bush had reduced your retirement plan's holdings of GM
> stock by 90% and given the unions a majority stake in GM, would you have
> approved?
>
>
> If George W. Bush had made a joke at the expense of the Special
> Olympics, would you have approved?
>
> If George W. Bush had given Gordon Brown a set of inexpensive and
> incorrectly formatted DVDs, when Gordon Brown had given him a thoughtful
> and historically significant gift, would you have approved?
>
>
> If George W. Bush had given the Queen of England an iPod containing
> videos of his speeches, would you have thought this embarrassingly
> narcissistic and tacky?
>
>
> If George W. Bush had bowed to the King of Saudi Arabia, would you have
> approved?
>
>
> If George W. Bush had visited Austria and made reference to the
> non-existent "Austrian language," would you have brushed it off as a
> minor slip?
>
> If George W. Bush had filled his cabinet and circle of advisers with
> people who cannot seem to keep current in their income taxes, would you
> have approved?
>
>
> If George W. Bush had been so Spanish illiterate as to refer to "Cinco
> de Cuatro" in front of the Mexican ambassador when it was the 5th of May
> (Cinco de Mayo), and continued to flub it when he tried again, would you
> have winced in embarrassment?
>
> If George W. Bush had misspelled the word "advice" would you have
> hammered him for it for years like Dan Quayle and "potatoe" as proof of
> what a dunce he is?
>
> If George W. Bush had burned 9,000 gallons of jet fuel to go plant a
> single tree on Earth Day, would you have concluded he's a hypocrite?
>
> If George W. Bush's administration had OK'd Air Force One to fly low
> over millions of people followed by a jet fighter in downtown Manhattan
> causing widespread panic, would you have wondered whether they actually
> get what happened on 9-11?
>
> If George W. Bush had failed to send relief aid to flood victims
> throughout the Midwest with more people killed or made homeless than in
> New Orleans, would you want it made into a major ongoing political issue
> with claims of racism and incompetence?
>
> If George W. Bush had created 32 or more Czars who report directly to
> him, bypassing the House and Senate on much of what is happening in
> America , would you have approved.
>
> If George W. Bush had ordered the firing of the CEO of a major
> corporation, even though he had no constitutional authority to do so,
> would you have approved?
>
> If George W Bush had proposed to double the national debt, which had
> taken more than two centuries to accumulate, in one year, would you have
> approved?
>
> If George W. Bush had then proposed to double the debt again within 10
> years, would you have approved?
>
>
> If George W. Bush had spent more than all the Presidents combined since
> George Washington, would you have approved?
>
>
> So, tell me again, what is it about Obama that makes him so brilliant
> and impressive? Can't think of anything? Don't worry. He's done all this
> in one year -- so you'll have 3 years to come up with an answer.
>

Try to imagine this parralell universe....

The world trade buildings get knocked down, our leader flys to afganastan
and says...
"I'm sorry we are such dicks you had to do that...here's a check to cover
your plane tickets"

== 2 of 2 ==
Date: Mon, Mar 22 2010 3:27 pm
From: John Martin


On Mar 22, 5:44 pm, rangerssuck <rangerss...@gmail.com> wrote:
> On Mar 22, 5:09 pm, John Martin <jmartin...@aol.com> wrote:
>
> > On Mar 22, 2:59 pm, rangerssuck <rangerss...@gmail.com> wrote:
>
> > > > So, tell me again, what is it about Obama that makes him so brilliant
> > > > and impressive? Can't think of anything? Don't worry. He's done all this
> > > > in one year -- so you'll have 3 years to come up with an answer.
>
> > > He can pronounce "Nuclear."
>
> > Couldn't pronounce "corpsman", though, could he?
>
> > And Jimmy Carter had the same trouble with "nuclear" - in spite of his
> > being a nuclear engineer.
>
> > John Martin
>
> Actually, Jimmy Carter sort of swallowed the "middle syllable" making
> it sound like nuk'lar.
>
> Here's a few of G.W.'s gaffes:http://www.trinicenter.com/modules.php?file=article&name=News&sid=27
>
> Bush would definitely have benefited from never opening his mouth
> without a teleprompter. Now, don't get me wrong - I don't think that
> his lack of verbal skills made him a bad President (though it was kind
> of embarrassing to hear foreign diplomats with a better command of the
> English language than our president), I think he would have been a
> lousy President even if he had spoken perfectly.

Bush's pronunciation of "nuclear" wasn't all that different from
Carter's. Maybe it's a Southern thing. Remember, though - Carter was
a nuclear engineer. Hard to think of anyone who should be more
attuned to the proper pronunciation of the word, isn't it?

You skipped over my question about Obama's pronunciation of
"corpsman". Did you find that at all embarassing? Or should we chalk
it up to being just a Chicago thing?

I served in the Marine Corps. Guess I'll now have to be a lot more
attentive when the Commander-In-Chief is speaking about Marines.

John Martin

==============================================================================
TOPIC: DIY surge protection...
http://groups.google.com/group/rec.crafts.metalworking/t/fa560b93f2504a9b?hl=en
==============================================================================

== 1 of 4 ==
Date: Mon, Mar 22 2010 3:33 pm
From: Jon Elson


pdrahn@coinet.com wrote:

> The power spikes can come from anywhere. I personally experienced
> equipment destroying spikes that came from the telephone wires. A
> construction company was excavating very deeply for a sewer pumping
> station near my office. Somehow they connected 220 volts to the buried
> telephone cable. The power went through the local phone company
> junction box and into our phone system and fax machine. The surge
> protectors immediately absorbed all the power they could and produced
> smoke. Then the power continued on to burn out circuit boards in the
> equipment.
I have a fairly expensive business phone system in my house, central
control box and stations here and there. So, I made my own protector.
I used a 10 Ohm 1 Watt film resistor in series with each incoming phone
wire, and then connected to a 3-terminal gas tube arrestor. The idea is
the film resistors blow like ultra-fast fuses during a severe surge,
allowing the gas tube to handle what got through before. This has
worked well, I've never had any damage to the phone system, but the DSL
modems I used to use got blitzed a couple times. The resistors did get
popped a couple times, too. I don't think you can get this kind of
phone wire arrestor anywhere as a complete unit, except maybe from a
telephone physical plant supplier. The gas tubes can be bought from
Digi-Key and similar electronics distributors.

I have had some other gear damaged, but due to the nature of the
equipment, I am pretty sure it was NOT from anything coming in the power
lines. Wires running from one end of your house to the other can
develop thousands of Volts when there is a nearby lightning strike, due
to magnetic induction. I've had some stuff in my home burglar alarm
damaged, as well as an ethernet port on a computer. (Most of this
damage all happened in one incident, nearby lightning strike.)

So, I'm not so sure that power line protectors will actually prevent a
whole lot of damage.

Jon


== 2 of 4 ==
Date: Mon, Mar 22 2010 3:39 pm
From: Jon Elson


Existential Angst wrote:

> So the surge protector is a kind of crude voltage regulator?
>
> Well, how about this:
>
> Why not put a 100 A relay in the service, with the coil connected to a
> fast-acting voltage-sensing amplifier.
> If the voltage goes up by more than, say, 10%, the relay is activated (or
> deactivated, if NO), all power to the house is broken, with the relay
> latching out, requiring a manual re-start. Proly a NO relay.
>
The standard protectors are tested against is the so-called 8/20 surge,
the 8 means an 8 MICROSECOND rise time. So, the current rises to it's
peak value in 8 us, then decays in 20 us after that. Relays take many
milliseconds to react, and a lightning surge will just jump right over
the open contacts, anyway. So, totally FORGET anything using relays.

Jon


== 3 of 4 ==
Date: Mon, Mar 22 2010 3:43 pm
From: Jon Elson


Existential Angst wrote:

> What do fast-acting UPS's use? Use the same thing? Mebbe solid state
> relays?
SSR's generally use SCR's, which have the property that they don't turn
off until the current is interrupted. Normal 60 Hz power turns off 120
times a second. But, when you tell the thing to turn off during a
surge, it will totally ignore the command because the current is still
flowing.

Really high-end UPS's do use fancy devices like back-to-back giant
IGBT's, but most probably just use an electro-mechanical relay, and are
designed to supplement dropped line power, not protect the load. There
are "on line" UPS's that only use electromechanical relays to bypass a
failed inverter, and otherwise all connection from input to output is
through the DC battery bank. These are usually pretty expensive
(thousands of $ for a small one) noisy and waste a lot of power, too.

Jon


== 4 of 4 ==
Date: Mon, Mar 22 2010 3:51 pm
From: Pete Keillor


On Mon, 22 Mar 2010 17:33:25 -0500, Jon Elson <jmelson@wustl.edu>
wrote:

>pdrahn@coinet.com wrote:
>
>> The power spikes can come from anywhere. I personally experienced
>> equipment destroying spikes that came from the telephone wires. A
>> construction company was excavating very deeply for a sewer pumping
>> station near my office. Somehow they connected 220 volts to the buried
>> telephone cable. The power went through the local phone company
>> junction box and into our phone system and fax machine. The surge
>> protectors immediately absorbed all the power they could and produced
>> smoke. Then the power continued on to burn out circuit boards in the
>> equipment.
>I have a fairly expensive business phone system in my house, central
>control box and stations here and there. So, I made my own protector.
>I used a 10 Ohm 1 Watt film resistor in series with each incoming phone
>wire, and then connected to a 3-terminal gas tube arrestor. The idea is
>the film resistors blow like ultra-fast fuses during a severe surge,
>allowing the gas tube to handle what got through before. This has
>worked well, I've never had any damage to the phone system, but the DSL
>modems I used to use got blitzed a couple times. The resistors did get
>popped a couple times, too. I don't think you can get this kind of
>phone wire arrestor anywhere as a complete unit, except maybe from a
>telephone physical plant supplier. The gas tubes can be bought from
>Digi-Key and similar electronics distributors.
>
>I have had some other gear damaged, but due to the nature of the
>equipment, I am pretty sure it was NOT from anything coming in the power
>lines. Wires running from one end of your house to the other can
>develop thousands of Volts when there is a nearby lightning strike, due
>to magnetic induction. I've had some stuff in my home burglar alarm
>damaged, as well as an ethernet port on a computer. (Most of this
>damage all happened in one incident, nearby lightning strike.)
>
>So, I'm not so sure that power line protectors will actually prevent a
>whole lot of damage.
>
>Jon

I remember at work in the early '80's (before PC) getting a whole
bunch of modems and a PDP/11-23+ comm board smoked due to a near miss.
The modems all turned into maracas. IT said it was induced surge on
the phone lines. I saw a lot of lightning arrestor stuff going up on
our feeders after that. We were about 5 miles of wire away from our
nearest plant power house.

After that, didn't have a problem. Coastal Texas gets a LOT of
lightning.

==============================================================================
TOPIC: Working class
http://groups.google.com/group/rec.crafts.metalworking/t/facb62633a2f2005?hl=en
==============================================================================

== 1 of 2 ==
Date: Mon, Mar 22 2010 3:48 pm
From: "Ed Huntress"

"Gunner Asch" <gunnerasch@gmail.com> wrote in message
news:1uofq5ddlu0f6fa4p573iut3vn9ui5nsk4@4ax.com...
> On Mon, 22 Mar 2010 12:19:19 -0700 (PDT), Jessica Wabbit
> <jaman@rock.com> wrote:
>
>>On Mar 22, 4:00 pm, Strabo <str...@flashlight.net> wrote:
>>> Jessica Wabbit wrote:
>>> > On Mar 22, 10:42 am, Strabo <str...@flashlight.net> wrote:
>>> >> hal wrote:
>>> >>> On Mon, 22 Mar 2010 04:16:35 -0700, Gunner Asch
>>> >>> <gunnera...@gmail.com>
>>> >>> wrote:
>>> >>>> And the winner of the Chicken Dinner is.....Obama......... 8% !!!
>>> >>>> Yep! Thats right! Only 8% !!! ..... the least by far of the last 19
>>> >>>> presidents!!
>>> >>> Notice you don't provide a cite. No doubt because you got this where
>>> >>> you get most of your shit... out of your ass..
>>> >>>> And these people are trying to tell our big corporations how to run
>>> >>>> their business?
>>> >>>> They know what's best for GM...Chrysler... Wall Street... and you
>>> >>>> and
>>> >>>> me?
>>> >>>> How can the president of a major nation and society...the one with
>>> >>>> the
>>> >>>> most successful economic system in world history... stand and talk
>>> >>>> about
>>> >>>> business when he's never worked for
>>> >>>> one? ...... or about jobs when he has never really had one??!
>>> >>> The man went to Harvard. Something you could never have done.
>>> >> It's very difficult to get into Harvard, not because of academic
>>> >> requirements but because acceptance is based on social and political
>>> >> criteria. So how did Barry Soetoro get in? What was his connection?
>>> >> And where did he get $50,000 a year?
>>>
>>> >> Barry Soetoro was CIA sponsored at Columbia.
>>>
>>> > I found where this comes from, and the originator is James David
>>> > Manning, a typical paranoid-delusional crazy. Strabo, you really keep
>>> > interesting company!
>>>
>>> You can clear up part of this by showing us Lord Barry's passports.
>>>
>>> And while you're rummaging around in the hidden documents drawer,
>>> get his Harvard application.
>>>
>>> Oh, and grab Lord Barry's birth certificate too!
>>
>>Can you make it any more plain that you are nuts?
>>

> For asking about the President of the United States of Americas birth
> cert, when there is so very much controversy about it?

There's no controversy. There are only delusional nuts. Like you, and
Strabo.

>
> Why would that be nuts? Do we simply accept that you have a skull
> filled with properly operationing brain cells..when there is so much
> evidence against it?

Who in the world would care about what you "accept"?

You're too far gone for that, Gunner. You're doing a full-time stand-up
routine, with Strabo as your straight man.

--
Ed Huntress


== 2 of 2 ==
Date: Mon, Mar 22 2010 4:10 pm
From: "dcaster@krl.org"


On Mar 22, 10:42 am, Strabo <str...@flashlight.net> wrote:

> > The man went to Harvard.  Something you could never have done.  
>
> It's very difficult to get into Harvard, not because of academic
> requirements but because acceptance is based on social and political
> criteria.

One reason it is hard to get into Harvard is that it does not cost
your family anything if the family income is less than $60,000 per
year. So they get applications from everyone that thinks they might
get accepted. From the Harvard U website.


Does Harvard offer financial aid?

Yes. Over 70 percent of Harvard students receive some form of
financial aid. Our policy of need-based financial aid is designed to
meet 100 percent of a family's demonstrated need. Our recent low– and
middle–income initiatives have made our aid program even more generous
by eliminating the parent contribution for families with incomes below
$60,000, reducing the parent contribution for families with incomes
between $60,000 and $180,000, and eliminating student loans. These
enhancements enable all students to participate fully in the
extracurricular life of the college. Our financial aid policies apply
equally to international students and to U.S. citizens.

Dan

==============================================================================
TOPIC: Would you buy a new Toyota?
http://groups.google.com/group/rec.crafts.metalworking/t/92b2cda20b50e86b?hl=en
==============================================================================

== 1 of 2 ==
Date: Mon, Mar 22 2010 4:00 pm
From: Jon Elson


Roger Shoaf wrote:
> Would it not be better to design engine components so they either lasted for
> the life of the engine or alternatively that they can be replaced without a
> $700 repair bill?
>
>
Yup, that'd be better. But, what about TRANSMISSIONS? The last two
cars my wife has driven had catastrophic auto. trans breakdown. One we
were relly lucky to find a guy who could rebuild it for $1300 bucks, the
next one we goofed and took it to the dealer -- $3100 ! YIKES!

Now, the next car she is driving is showing signs of transmission
trouble, leaks and slipping when cold. We're feeding it a steady diet
of transmission fluid, and so far it is still running.

This could drive me back to the stick shift (which my family just got me
to give up after 30 years).

Jon


== 2 of 2 ==
Date: Mon, Mar 22 2010 5:13 pm
From: Wes


Joe Pfeiffer <pfeiffer@cs.nmsu.edu> wrote:

>No, but it has nothing to do with the unintended-acceleration issue
>(which is, at best, a very rare occurrence). My 1990 Toyota pickup
>turns out to be almost impossible to work on in comparison to any of my
>other cars, and I've got no interest in having another one.

I know the older toyota's were bullet proof. But as to the question on new, heck no,
doesn't matter what brand, I drive 26,000 miles a year. Lease returns are what are most
economic for me. Large probablitiy it was maintained and it was returned with a lot of
life on it.

Now a lease return Toyota, if my Saturn dies soon (only 198000 miles), might be okay if
the price is right.

All the fwd cars are difficult to work on if you grew up on full sized cars back about 40
years ago.

Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller

==============================================================================
TOPIC: A littel help, please . . .
http://groups.google.com/group/rec.crafts.metalworking/t/50f1536cf33d9775?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Mar 22 2010 5:07 pm
From: Wes


"Pete C." <aux3.DOH.4@snet.net> wrote:

>
>Robert Swinney wrote:
>>
>> Upon boot-up the message, "Error - Program version is wrong. Please install again." This in my win
>> XP desktop. A casual search seems to say, somehow, that Windows Installer is missing. The
>> suggestion: Start>Run> register with "msiexec/unregister" and reregister with "msiexec/regserver".
>> Each/either leads to the message: "Windows cannot find msiexec/******. This began happening
>> following attempted upgrade to 2010 DVD of mapping software. Suggestions ??
>>
>> Bob Swinney
>
>Restore from backups.

Doesn't XP have the facility to roll back the system at various points? I'm still using
W2K pro and seldom use my XP pro laptop enough to get to know XP.

Wes

==============================================================================
TOPIC: Big electric motors and little VFD's
http://groups.google.com/group/rec.crafts.metalworking/t/465b6cc7b79a1cce?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Mar 22 2010 4:15 pm
From: Jon Elson


Robert Swinney wrote:
> Under-powered VFDs cannot cope with the starting surge demands of a "too" large motor.
It is not the starting surge, it is the line current. The line current
of most motors doesn't change much from no-load to full load. What
changes is the angle between voltage and current. So, an undersize VFD
can't supply the line current the motor draws, even at no-load.

Jon


==============================================================================

You received this message because you are subscribed to the Google Groups "rec.crafts.metalworking"
group.

To post to this group, visit http://groups.google.com/group/rec.crafts.metalworking?hl=en

To unsubscribe from this group, send email to rec.crafts.metalworking+unsubscribe@googlegroups.com

To change the way you get mail from this group, visit:
http://groups.google.com/group/rec.crafts.metalworking/subscribe?hl=en

To report abuse, send email explaining the problem to abuse@googlegroups.com

==============================================================================
Google Groups: http://groups.google.com/?hl=en

0 Comments:

Post a Comment

Subscribe to Post Comments [Atom]

<< Home


Real Estate