This is a multi-part message in MIME format.
--===============5918401906270629179==
boundary="------------YjquKzsxKAJ6EOlUiCLxGJPL"
Content-Language: en-GB
This is a multi-part message in MIME format.
--------------YjquKzsxKAJ6EOlUiCLxGJPL
Content-Transfer-Encoding: 8bit
Both those are describing the function of the instrument which is the
same in both cases and is not the point in question. Even so the first
definition includes the statement "In formal engineering nomenclature,
more precise terms are used to distinguish the two.".
The PO's question was how do I connect a _tachometer_ , and the answer
to that is fundamentally different to a rev counter. A rev counter
displays the rate at which a cable drive is turning, a tachometer
measures the time between successive electrical pulses. In the rev
counter case it doesn't matter whether it is on a 4, 6 or 8 (etc.)
cylinder whereas for a tachometer the pulses from an 8 cylinder engine
are coming in at twice the rate of a 4-cylinder and there have to be
_internal_ differences in the tachometer to display that correctly. If
the terms are used interchangeably then when responding to a (formal
engineering?) question you would first have to establish which one is
being talked about!
PaulH.
On 02/08/2023 14:29, dave northrup wrote:
>
> From Wikipedia
>
> A *tachometer*Â (*revolution-counter*, *tach*, *rev-counter*, *RPM
> gauge*) is an instrument measuring the rotation speed of a shaft
> <https://en.wikipedia.org/wiki/Axle>Â or disk, as in a motor or other
> machine.^[1] <https://en.wikipedia.org/wiki/Tachometer#cite_note-1>
> Â The device usually displays the revolutions per minute
> <https://en.wikipedia.org/wiki/Revolutions_per_minute>Â (RPM) on a
> calibrated analogue dial, but digital displays are increasingly common.
>
> The word comes from Greek
> <https://en.wikipedia.org/wiki/Greek_language> Ï?άÏ?οÏ? (/táchos/ "speed")
>
> and μÎÏ?Ï?ον (/métron/ "measure"). Essentially the words tachometer
> and
> speedometer <https://en.wikipedia.org/wiki/Speedometer>Â have identical
> meaning: a device that measures speed. It is by arbitrary convention
> that in the automotive world one is used for engine revolutions and
> the other for vehicle speed. In formal engineering nomenclature, more
> precise terms are used to distinguish the two.
>
> From dictionary.com
>
> *tachometer*
>
> [ ta-*kom*-i-ter, t/uh/- ]SHOW IPA
>
> ------------------------------------------------------------------------
>
> /noun/
>
> 1. any of various instruments for measuring or indicating velocity or
> speed, as of a machine, a river, or the blood.
> 2. an instrument measuring revolutions per minute, as of an engine.
>
>
--------------YjquKzsxKAJ6EOlUiCLxGJPL
boundary="------------cRmnomIB5qZBv63YXHp5eDZx"
--------------cRmnomIB5qZBv63YXHp5eDZx
Content-Transfer-Encoding: 8bit
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Both those are describing the function of the instrument which is
the same in both cases and is not the point in question. Even so
the first definition includes the statement "<span
style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#202122">In
formal engineering nomenclature, more precise terms are used to
distinguish the two.".<br>
</span></p>
<p>The PO's question was how do I connect a _tachometer_ , and the
answer to that is fundamentally different to a rev counter. A rev
counter displays the rate at which a cable drive is turning, a
tachometer measures the time between successive electrical
pulses. In the rev counter case it doesn't matter whether it is
on a 4, 6 or 8 (etc.) cylinder whereas for a tachometer the pulses
from an 8 cylinder engine are coming in at twice the rate of a
4-cylinder and there have to be _internal_ differences in the
tachometer to display that correctly. If the terms are used
interchangeably then when responding to a (formal engineering?)
question you would first have to establish which one is being
talked about!<br>
</p>
<p>PaulH.<br>
</p>
<div class="moz-cite-prefix">On 02/08/2023 14:29, dave northrup
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:f02a88b8d25648ad8effc0409adad964@ranteer.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]-->
<style>@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}div.WordSection1
{page:WordSection1;}ol
{margin-bottom:0in;}ul
{margin-bottom:0in;}</style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1027" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p
style="mso-margin-top-alt:6.0pt;margin-right:0in;margin-bottom:6.0pt;margin-left:0in;background:white"><span
style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#202122">From
Wikipedia<o:p></o:p></span></p>
<p
style="mso-margin-top-alt:6.0pt;margin-right:0in;margin-bottom:6.0pt;margin-left:0in;background:white"><span
style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#202122">A <b>tachometer</b> (<b>revolution-counter</b>, <b>tach</b>, <b>rev-counter</b>, <b>RPM
gauge</b>) is an instrument measuring the rotation speed
of a <a href="https://en.wikipedia.org/wiki/Axle";
title="Axle" moz-do-not-send="true"><span
style="color:#3366CC;text-decoration:none">shaft</span></a>Â or
disk, as in a motor or other machine.</span><sup
id="cite_ref-1"><span
style="font-size:8.5pt;font-family:"Arial",sans-serif;color:#202122"><a
href="https://en.wikipedia.org/wiki/Tachometer#cite_note-1";
moz-do-not-send="true"><span
style="color:#3366CC;text-decoration:none">[1]</span></a></span></sup><span
style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#202122">Â The
device usually displays the <a
href="https://en.wikipedia.org/wiki/Revolutions_per_minute";
title="Revolutions per minute" moz-do-not-send="true"><span
style="color:#3366CC;text-decoration:none">revolutions
per minute</span></a>Â (RPM) on a calibrated analogue
dial, but digital displays are increasingly common.</span><span
style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#202122"><o:p></o:p></span></p>
<p
style="mso-margin-top-alt:6.0pt;margin-right:0in;margin-bottom:6.0pt;margin-left:0in;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans:
2;text-align:start;widows: 2;-webkit-text-stroke-width:
0px;text-decoration-thickness: initial;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px"> <span
style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#202122">The
word comes from <a
href="https://en.wikipedia.org/wiki/Greek_language";
title="Greek language" moz-do-not-send="true"><span
style="color:#3366CC;text-decoration:none">Greek</span></a> Ï?άÏ?οÏ? (<i>táchos</i> "speed")
and μÎÏ?Ï?ον (<i>métron</i> "measure"). Essentially the
words
tachometer and <a
href="https://en.wikipedia.org/wiki/Speedometer";
title="Speedometer" moz-do-not-send="true"><span
style="color:#3366CC;text-decoration:none">speedometer</span></a>Â have
identical meaning: a device that measures speed. It is by
arbitrary convention that in the automotive world one is
used for engine revolutions and the other for vehicle speed.
In formal engineering nomenclature, more precise terms are
used to distinguish the two.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p>Â </o:p></p>
<p class="MsoNormal">From dictionary.com<o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:36.0pt;font-family:"Arial",sans-serif">tachometer<o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:13.5pt;font-family:"Arial",sans-serif">[
ta-<b>kom</b>-i-ter, t<i>uh</i>- ]</span><span
style="font-family:"Arial",sans-serif">SHOW
IPA<o:p></o:p></span></p>
<p class="MsoNormal"><!--[if gte vml 1]><v:shapetype id="_x0000_t75"
coordsize="21600,21600" o:spt="75" o:preferrelative="t"
path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f">
<v:stroke joinstyle="miter" />
<v:formulas>
<v:f eqn="if lineDrawn pixelLineWidth 0" />
<v:f eqn="sum @0 1 0" />
<v:f eqn="sum 0 0 @1" />
<v:f eqn="prod @2 1 2" />
<v:f eqn="prod @3 21600 pixelWidth" />
<v:f eqn="prod @3 21600 pixelHeight" />
<v:f eqn="sum @0 0 1" />
<v:f eqn="prod @6 1 2" />
<v:f eqn="prod @7 21600 pixelWidth" />
<v:f eqn="sum @8 21600 0" />
<v:f eqn="prod @7 21600 pixelHeight" />
<v:f eqn="sum @10 21600 0" />
</v:formulas>
<v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect" />
<o:lock v:ext="edit" aspectratio="t" />
</v:shapetype><v:shape id="Rectangle_x0020_1" o:spid="_x0000_s1026"
type="#_x0000_t75"
style='width:24pt;height:24pt;visibility:visible;mso-left-percent:-10001;mso-top-percent:-10001;mso-position-horizontal:absolute;mso-position-horizontal-relative:char;mso-position-vertical:absolute;mso-position-vertical-relative:line;mso-left-percent:-10001;mso-top-percent:-10001'>
<w:wrap type="none"/>
<w:anchorlock/>
</v:shape><![endif]--><!--[if !vml]--><img
style="width:.3333in;height:.3333in"
src="cid:part1.UXndNocW.bJbEUtQ4@gmail.com"
v:shapes="Rectangle_x0020_1" class="" width="32"
height="32"><!--[endif]--><span
style="font-family:"Arial",sans-serif"><o:p></o:p></span></p>
<div class="MsoNormal"
style="margin-bottom:15.0pt;text-align:center" align="center">
<hr width="100%" size="2" align="center"> </div>
<p class="MsoNormal" style="margin-bottom:15.0pt"><i><span
style="font-size:13.5pt;font-family:"Arial",sans-serif;color:black">noun</span></i><span
style="font-size:13.5pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<ol style="margin-top:0in" type="1" start="1">
<li class="MsoNormal" style="color:black;mso-list:l0 level1
lfo1"><span
style="font-size:13.5pt;font-family:"Arial",sans-serif">any
of various instruments for measuring or indicating
velocity or speed, as of a machine, a river, or the
blood.<o:p></o:p></span></li>
<li class="MsoNormal" style="color:black;mso-list:l0 level1
lfo1"><span
style="font-size:13.5pt;font-family:"Arial",sans-serif">an
instrument measuring revolutions per minute, as of an
engine.</span></li>
</ol>
</div>
<br>
</blockquote>
</body>
</html>
--------------cRmnomIB5qZBv63YXHp5eDZx
Content-Disposition: inline; filename="image001.png"
Content-Id: <part1.UXndNocW.bJbEUtQ4@gmail.com>
Content-Transfer-Encoding: base64
iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAMAAAC7IEhfAAAAAXNSR0ICQMB9xQAAAANQTFRF
AAAAp3o92gAAAAF0Uk5TAEDm2GYAAAAJcEhZcwAAEnQAABJ0Ad5mH3gAAAAZdEVYdFNvZnR3
YXJlAE1pY3Jvc29mdCBPZmZpY2V/7TVxAAAAFUlEQVQ4y2NgGAWjYBSMglEwCmgHAAZoAAE5
et71AAAAAElFTkSuQmCC
--------------cRmnomIB5qZBv63YXHp5eDZx--
--------------YjquKzsxKAJ6EOlUiCLxGJPL--
--===============5918401906270629179==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
Mgs@autox.team.net
Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/mgs/mharc@autox.team.net
--===============5918401906270629179==--
|