metrology

What I Spend All My Allowance Money On. ;D

Been getting some upgrades to my measurement equipment over the last few months. Still a work in progress. Need to find a reasonably priced 1" dial indicator to replace the Craftex.

Got some real good brand-name stuff in there now, so I’m much more confident in my measurements. I especially like the hugeass Starrett dial indicator on the upper-right, practically stole it on ebay for $39! And the new digital micrometers, woo… 0.00005" resolution (50 millionths of an inch)!

36 piece set of NIST-traceable precision gage blocks are already on their way and should arrive by tomorrow afternoon. Mmmmm, precision and accuracy. :9

Here’s a list of (most) everything in the photo, in no particular order:

Aerospace dial test indicator, 0-15-0 face 0.0005" resolution 0.045" travel

Mitutoyo 0-6" digital caliper

Starrett dial indicator 0-20 face 0.0001" resolution 0.400" travel

Craftex dial indicator 0-100 face 0.001" resolution 1" travel w/depth gauge adapter

Mitutoyo dial indicator 0-50 face .0005" resolution 0.125" travel

Fowler 0.2-1.2" 0.001" resolution inside micrometer with 0.200" reference standard

Starrett 0-1" and 1-2" digital micrometers, 0.00005" resolution with 1.000" reference standard

Groz single-point threading tool gauge

Groz precision 2" machinist square

0-6"/0-155mm scale/ruler

various small-hole bore gages

various snap gages

Megalithic or 366 Geometry.

According to hypothesis of Alan Butler and Christopher Knight, megalithic civilization of Britain and Britanny, France used  366-degree geometry (also called megalithic geometry). This geometry, whose origin is claimed to go back to c. 3,000 BC, would have used a 366-degree circle rather than a 360-degree circle as we do today. Alan Butler also asserts that 366-degree geometry has been materialised on the Earth by what he terms Salt Lines – 366 meridians and 183 parallels crisscrossing the globe at regular intervals (the equivalents of modern-day 360 meridians and 180 parallels).

Butler and Knight claim that the Megalithic Yard is a fundamental number for the Sun, the Moon and the Earth. The Megalithic arc second as measured on the Earth equator is very close to 366 Megalithic Yards, while the lunar Megalithic arc second as measured on the Moon equator is very close to 100 Megalithic yards, and the solar Megalithic arc second as measured on the Sun equator is very close to 40,000 Megalithic Yards.

French author Sylvain Tristan suggests that the numbers 366, 40 and 10 are not only fundamental to the Earth, the Moon and the Sun, but also to the human body and water. In the water-based Celsius temperature measurement system, which is directly linked to base-10 numeration, the average human body temperature is 36.6 degrees. On a scale where the absolute zero is defined as being minus 1,000 degrees, water boils at the temperature of 366 degrees, which points at something intrinsically fundamental in these numbers.

Alan Butler also asserts that 366-degree geometry has been materialised on the Earth by what he terms Salt Lines – 366 meridians and 183 parallels crisscrossing the globe at regular intervals (the equivalents of modern-day 360 meridians and 180 parallels). Most of the world’s capital cities or sanctuaries of late prehistory and antiquity are located on the course of Salt Lines: it includes Stonehenge, Avebury, Babylon, Assur, Niniveh, Thebes, Abu Simbel, Harappa, Mycenae, Athenes, Hattusa, Alesia, Teotihuacan, Chichén Itzá, Tiwanaku and Caral. According to the author, such a situation challenges probability laws and can hardly been explained away by chance only, and thus is the result of some common knowledge held by the Megalithic civilisation that might have spread to different parts of the globe.

2

Inside a lab near Washington, D.C., there is a stack of stainless steel that weighs a million pounds.

It’s part of a unique machine that was built in 1965 and just refurbished for the first time. And in the world of metrology, the science of measurement, this giant is a source of national pride.

Read the full story, from Nell Greenfieldboyce, here.

Images courtesy of Jennifer Lauren Lee/NIST PML

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Best birthday present EVER! 36 x 48 x 6 granite with stand. Thanks Ashley! Yes it’s heavy.  And what does one do with a giant rock like this? Well, first of all, it’s not a giant rock. It’s a piece of precision measuring equipment, flat to within 0.0004 inches, making it a grade B, which is pretty damn flat. If you hope to make things that are nice and accurate, you need a nice flat accurate place to check and measure them. I’m very happy about my new 1,200 pound baby.

I am a metrologist by trade, so to convey what that means, and how I spend my working hours here is this fun little picture. The little Mu next to the “m” stands for micro (10^-6). So a Micron is a micrometer (.001 mm.) The Anthrax shown above is .001mm long, and that is the level of accuracy to which I report. The tolerance bands for the dimensions I measure range between the pollen grains at .015mm and the salt grain at .060mm. This is the scale you can expect for most “precision” industrial metrology. Pushing smaller starts you into the realm of nano-metrolgy which is a whole-other ballpark.

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[Secrets in Plain Sight Volume 2 - Trailer]

“Here is a glimpse of the many fascinating subjects discussed in Secrets in Plain Sight Volume 2 which include numbers, metrology, sacred geometry, geographic alignments, synchronicity, conspiracy, and divine intervention. The journey covers places such as the Great Pyramid, Stonehenge, Baalbek, Mecca, Jerusalem, Babylon, Hollywood, Century City, New York City, the World Trade Center, London, Washington DC, and San Francisco.

FYI: The piece of music in the trailer is Beethoven’s Moonlight Sonata (third movement).”

This looks like it’s going to be awesome! If you haven’t seen the original ‘Secrets in Plain Sight’ I highly recommend it if you’re interested in these topics.

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My current collection of dial indicators. The beast on the left arrived in the mail today, practically a steal on eBay for only $39!

Starrett 656-617 0.0001" resolution 0.400" range

Mitutoyo 1506N 0.0005" resolution 0.125" range

Craftex (chinese brand) 0.001" resolution 1.000" range

Aerospace (chinese brand) 0.0005" resolution 0.045" range

The cheap chinese ones are of course for potentially rougher handling/environments etc.(not that I abuse my tools on purpose), and I don’t mind if they accidentally get destroyed. The Craftex costs like $15 brand new so it’s no big deal to replace.

Next on the wish list is a nicer 1" travel indicator from Starrett or Mitutoyo. Unfortunately, the popular models sell for a significantly higher amount of money than the big Starrett I have. :[ *le frown*