OT Re: [AT] Generator--doing funny things, Now electronics.
Thomas O. Mehrkam
tomehrkam at houston.rr.com
Sat Jun 17 06:11:14 PDT 2006
They new stuff is great until it breaks then watch out.
I am currently having a problem with my 1996 Suburban. The AC stopped
working. I traced it down to a transistor in the AC control module. I
replaced this transistor four times and it kept failing. Or course the
number on the transistor was non standard and I had to reverse engineer
the ckt by tracing out the ckt and drawing a schematic.
I finally replaced the module for $226. It ran for a month and then
failed again. I guess there is a intermittent short somewhere in the system.
Guess what this module is replacing. Remember the old ones where cables
controlled the vents and switches and relays controlled the compressor.
I will be replacing the transistor again and tracing the ckt out inch by
inch.
I would take it to the dealer except I am sure they would start by
replacing the A/C module. It would take a thousand dollars and several
trips for them to find the problem. I guess I will just plug along on my
on.
Maybe I can rig some cables and relays. :-}
What does this have to do with Antique tractors. Nothing. But all those
soon to be antiques that are being produced today are controlled by
Electronics. I wounder what collectors will do 75 years from now to
restore them.
charlie hill wrote:
> Larry, our grandfathers and great grandfathers thought the same thing
> about our old tractors when they were new and replaced the horses.
> Personally I like both the old technology and the new.
> A friend of mine recently got re-married to a guy that tends 3500 acres
> of cotton.
>
> She was telling me about bedding up rows. I quized her because I knew
> that level of tractor operation was above what she knew how to do. Then
> she explained that it was the new tractor with the GPS system. Seems it
> has all the fields they farm mapped into it. All she has to do is drive
> the tractor in the field and line it up with the line on the display.
> Then it takes over and she get's to turn it around at the other end of
> the field. Apparently the thing never varies more than a inch from one
> end of the field to the other.
>
> I don't know about you but I never ran a row that straight. grins.
>
> Charlie
> ----- Original Message ----- From: "Larry D. Goss" <rlgoss at evansville.net>
> To: "'Antique tractor email discussion group'"
> <at at lists.antique-tractor.com>
> Sent: Saturday, June 17, 2006 12:01 AM
> Subject: RE: [AT] Generator--doing funny things
>
>
>> Well, that too, Steve, but if you'll pardon the 16-cylinder wording--
>> there's been a paradigm shift in how all machines are controlled. These
>> old farm tractors that we work with were controlled with linkages,
>> gears, wheels, and handles. Today's monster machines are miracles of
>> electronically controlled hydraulic systems with up to seven pre-sets on
>> the lift system so you can "hitch and go" to instantaneously change over
>> from one attachment to another in a minimum of time. An operator can
>> have his fields analyzed as he drives through them and have weed or
>> insect infestations recorded by GPS and treated automatically the next
>> time he drives by.
>>
>> And it's just as bad or worse in any other field you want to look at.
>> We can't do anything anymore without putting a microprocessor or two
>> inside it.
>>
>> I'd better stop before this goes from being a commentary to a soap box.
>>
>> Larry
>>
>> -----Original Message-----
>> From: at-bounces at lists.antique-tractor.com
>> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Steve W.
>> Sent: Friday, June 16, 2006 9:47 PM
>> To: Antique tractor email discussion group
>> Subject: Re: [AT] Generator--doing funny things
>>
>> So your saying that most of todays engineers like things that are
>> silicone "enhanced"...
>>
>> Steve Williams
>> Near Cooperstown, New York
>>
>>
>> ----- Original Message ----- From: "Larry D. Goss"
>> <rlgoss at evansville.net>
>> To: "'Antique tractor email discussion group'"
>> <at at lists.antique-tractor.com>
>> Sent: Friday, June 16, 2006 9:27 PM
>> Subject: RE: [AT] Generator--doing funny things
>>
>>
>>> This is more talk about EE machinery than I've seen in better than 20
>>> years. The next thing you know somebody will start talking about
>>
>> shaded
>>
>>> poles, hysteresis, and all that other jazz. In some respects it's
>>
>> very
>>
>>> refreshing to know that there are still some engineers out there who
>>
>> can
>>
>>> work with things that not controlled with silicon chips.
>>>
>>> Larry
>>>
>>> -----Original Message-----
>>> From: at-bounces at lists.antique-tractor.com
>>> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Thomas O.
>>> Mehrkam
>>> Sent: Friday, June 16, 2006 7:56 PM
>>> To: Antique tractor email discussion group
>>> Subject: Re: [AT] Generator--doing funny things
>>>
>>> I think you are saying the same thing he is.
>>>
>>> Clock motors have little load and are designed so there is no
>>
>> slippage.
>>
>>>
>>> Motors have some slippage and run at a slightly slower speed.
>>>
>>> From another EE. This group is infested with then. :-}
>>>
>>> charlie hill wrote:
>>> > Will, I guess I'm stupid to be arguing with an EE but I thought the
>>> RPM
>>> > of electric generators was to control the frequency. Most stuff
>>
>> runs
>>
>>> at
>>> > 60 HZ. 3600 rpm / 60 sec/min corresponds to 60 Hz in the case of a 2
>>> > pole generator. Other wise our old style clocks wouldn't be right
>>
>> and
>>
>>>
>>> > our TV pictures would look funny. Am I wrong about that?
>>> >
>>> > Charlie
>>> >
>>> > ----- Original Message ----- From: <Bustedtractor at aol.com>
>>> > To: <at at lists.antique-tractor.com>
>>> > Sent: Friday, June 16, 2006 6:19 PM
>>> > Subject: Re: [AT] Generator--doing funny things
>>> >
>>> >
>>> >> The RPMs for a generator will usually be either 3600 or 1800. A
>>> 2-pole
>>> >> generator operates at 3600 RPMs, while a 4-pole generator will run
>>
>> at
>>
>>>
>>> >> 1800 RPMs.
>>> >> There is the possibility of a 6-pole unit in which case the RPMs
>>> would be
>>> >> 1200. These RPM numbers are governed by the laws of physics and
>>
>> also
>>
>>> >> represent
>>> >> the nominal speeds that a electric motors will run at. The actual
>>> >> operating
>>> >> speeds for motors are slightly less due to slip. Electric motors
>>> >> typically run
>>> >> at 3450, 1725, and 1150 RPMs based on their design and
>>
>> construction.
>>
>>> >>
>>> >> I just retired from electrical engineering 2 weeks ago and now I
>>
>> have
>>
>>> a
>>> >> number of tractors that are begging for my full-time attention.
>>> >>
>>> >> Will in MN
>>> >>
>>> >> -------------------------------1150496391
>>> >> Content-Type: text/html; charset="US-ASCII"
>>> >> Content-Transfer-Encoding: quoted-printable
>>> >>
>>> >> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
>>> >> <HTML><HEAD>
>>> >> <META http-equiv=3DContent-Type content=3D"text/html;
>>> >> charset=3DUS-ASCII">
>>> >> <META content=3D"MSHTML 6.00.2900.2912" name=3DGENERATOR></HEAD>
>>> >> <BODY id=3Drole_body style=3D"FONT-SIZE: 10pt; COLOR: #000000;
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>>> >> <DIV>The RPMs for a generator will usually be either 3600 or
>>> >> 1800. A 2-=
>>> >> pole=20
>>> >> generator operates at 3600 RPMs, while a 4-pole generator will
>>> >> run at 1=
>>> >> 800=20
>>> >> RPMs. There is the possibility of a 6-pole unit in which case the
>>> RPMs
>>> >> would=
>>> >> be=20
>>> >> 1200. These RPM numbers are governed by the laws of physics
>>
>> and
>>
>>> >> also=20
>>> >> represent the nominal speeds that a electric motors will run at.
>>
>> The
>>
>>> >> actual=20
>>> >> operating speeds for motors are slightly less due to slip. Electric
>>> >> motors=20
>>> >> typically run at 3450, 1725, and 1150 RPMs based on their design
>>> and=20
>>> >> construction.</DIV>
>>> >> <DIV> </DIV>
>>> >> <DIV>I just retired from electrical engineering 2 weeks ago
>>
>> and
>>
>>> >> now I h=
>>> >> ave=20
>>> >> a number of tractors that are begging for my full-time
>>> attention.</DIV>
>>> >> <DIV> </DIV>
>>> >> <DIV>Will in MN</DIV></FONT></BODY></HTML>
>>> >> _______________________________________________
>>> >> AT mailing list
>>> >> Remembering Our Friend Cecil Monson 11-4-2005
>>> >> http://www.antique-tractor.com/mailman/listinfo/at
>>> >>
>>> >>
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>>> >>
>>> >
>>> >
>>> > _______________________________________________
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>>>
>>>
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>> AT mailing list
>> Remembering Our Friend Cecil Monson 11-4-2005
>> http://www.antique-tractor.com/mailman/listinfo/at
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>
>
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