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Stepper motor or quadrature coil driven gauges actively drive the needle to=
a given angle on the gauge, so they are not that sensitive to the needle w=
eight. However, our old-school tachometer only expects to drive against the=
torsion spring in the needle movement, and its linearity across the scale =
depends on being properly counterbalanced. If you put on extra paint withou=
t adjusting the counterbalance then the tach will start to read low at idle=
and high at the redline.
Theo
.team.net>>
olVT@aol.com>>
Date: Saturday, September 10, 2016 at 9:05 AM
Subject: Re: [Tigers] guage needle paint
Think I told this story before.....a person I know worked in a factory run =
by BF Goodrich Aerospace many yrs. ago. She soldered and assembled parts to=
gauges. Her place in the assembly line was to solder a few parts, paint t=
he needle and assemble her section of the gauge. I asked what the needle p=
aint was and she said she didn't know. It was just something in a little bo=
ttle and had a brush. She said the other people put one coat on the needle,=
but she liked to put on 3 coats to make it look nice:-)
Someone reminded me that these gauges were most probably calibrated after =
final assembly and testing. But it seems funny when we worry about putting =
too much paint on our needles. These gauges, being used in the aerospace i=
ndustry, gauges that were assembled by workers who had to become certified =
solderers (never knew that designation existed) , each worker having a spec=
ific task in the assembly and these gauges having to cost 10's of thousand=
s of $ each, just got a few dabs of some kind of red paint[http://cdn-cf.ao=
l.com/se/smi/0201d201a5/08]
________________________________
CONFIDENTIALITY NOTICE: This email and any attachments are for the sole use=
of the intended recipient(s) and contain information that may be Garmin co=
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l in error, please notify the sender by reply email and delete the message.=
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<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>Stepper motor or quadrature coil driven gauges actively drive the need=
le to a given angle on the gauge, so they are not that sensitive to the nee=
dle weight. However, our old-school tachometer only expects to drive agains=
t the torsion spring in the needle
movement, and its linearity across the scale depends on being properly cou=
nterbalanced. If you put on extra paint without adjusting the counterbalanc=
e then the tach will start to read low at idle and high at the redline.</di=
v>
<div><br>
</div>
<div>Theo</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Tigers <<a href=3D"mailto:=
tigers-bounces@autox.team.net">tigers-bounces@autox.team.net</a>> on beh=
alf of Tigers List <<a href=3D"mailto:tigers@autox.team.net";>tigers@auto=
x.team.net</a>><br>
<span style=3D"font-weight:bold">Reply-To: </span>"<a href=3D"mailto:C=
oolVT@aol.com">CoolVT@aol.com</a>" <<a href=3D"mailto:CoolVT@aol.co=
m">CoolVT@aol.com</a>><br>
<span style=3D"font-weight:bold">Date: </span>Saturday, September 10, 2016 =
at 9:05 AM<br>
<span style=3D"font-weight:bold">To: </span>"<a href=3D"mailto:tsmit@s=
haw.ca">tsmit@shaw.ca</a>" <<a href=3D"mailto:tsmit@shaw.ca";>tsmit@=
shaw.ca</a>>, Tigers List <<a href=3D"mailto:tigers@autox.team.net";>t=
igers@autox.team.net</a>><br>
<span style=3D"font-weight:bold">Subject: </span>Re: [Tigers] guage needle =
paint<br>
</div>
<div><br>
</div>
<div>
<meta name=3D"GENERATOR" content=3D"MSHTML 11.00.9600.18427">
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<div>Think I told this story before.....a person I know worked in a factory=
run by BF Goodrich Aerospace many yrs. ago. She soldered and assembled par=
ts to gauges. Her place in the assembly line was to solder a few part=
s, paint the needle and assemble her
section of the gauge. I asked what the needle paint was and she said=
she didn't know. It was just something in a little bottle and had a brush.=
She said the other people put one coat on the needle, but she liked to put=
on 3 coats to make it look nice:-)</div>
<div> Someone reminded me that these gauges were most probably calibra=
ted after final assembly and testing. But it seems funny when we worry abou=
t putting too much paint on our needles. These gauges, being use=
d in the aerospace industry, gauges that were assembled
by workers who had to become certified solderers (never knew that designat=
ion existed) , each worker having a specific task in the assembly and=
these gauges having to cost 10's of thousands of $ each, just got a few da=
bs of some kind of red paint<img src=3D"http://cdn-cf.aol.com/se/smi/0201d2=
01a5/08"></div>
</font></div>
</div>
</span><br>
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CONFIDENTIALITY NOTICE: This email and any attachments are for the sole use=
of the intended recipient(s) and contain information that may be Garmin co=
nfidential and/or Garmin legally privileged. If you have received this emai=
l in error, please notify the sender
by reply email and delete the message. Any disclosure, copying, distributi=
on or use of this communication (including attachments) by someone other th=
an the intended recipient is prohibited. Thank you.<br>
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