Talk:Caliper

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[edit] Need to add skinfold caliper to article

There is also a caliper which is not used in Metalworking but in medicine and fitness/bodybuilding.

It is a device which measures the thickness of a fold of skin with its underlying layer of fat. It is also called a fat caliper or skinfold caliper By doing this at key locations, shown by research to be representative of the total amount of fat on the body, it is possible to estimate the total percent bodyfat of a person. —Preceding unsigned comment added by [[User:{{{1}}}|{{{1}}}]] ([[User talk:{{{1}}}|talk]] • [[Special:Contributions/{{{1}}}|contribs]])

Maybe because they're often inaccurate nobody wants to write this up206.248.133.183 (talk) 19:51, 4 April 2008 (UTC)

[edit] History of calipers?

Can anyone add anything about the history of the caliper? What is the earliest recorded date for the use of calipers? 194.200.237.219 18:05, 25 November 2005 (UTC)

[edit] Should we add a link to the Vernier scale?

Seems appropriate, since the picture mentions it and it's mentioned in the article.

--Xcmadman2004 08:13, 10 March 2007 (UTC)

[edit] How do digital calipers know their position?

They seem to be able to know their position even when powered up away from zero, so I presume they have some position code embedded on some surface. But there is nothing obvious. An alternative is that they integrate position like an optical mouse, but how would this work when they are off? A magnetic pattern is a possibility, but the care and feeding doesn't mention magnets. njh 01:11, 27 February 2006 (UTC)

They never actually turn "off", even if the display is blanked. So they just keep counting pulses back-and-forth from the last point you told them was "zero". Try it some time: slide the caliper out a ways, remove the battery, and re-insert it. They will treat the current point as zero.
Atlant 04:21, 27 February 2006 (UTC)
Ok, that makes sense. How is the position encoded? Optical, magnetic or magic? njh 07:32, 27 February 2006 (UTC)
Some manufacturers claim that they use a kind of electrical capacitor to get the reading. But how is it actually realized, what circuits are used? —The preceding unsigned comment was added by 84.150.38.211 (talk) 16:02, 4 March 2007 (UTC).
I would like to suggest adding a link explaining how a digital caliper work.
See the following for how the calipers work:
http://www.biotele.com/digital_caliper.htm
http://www.capsense.com/capsense-wp.pdf
I opened one up today to verify the essentials of the board layout are as stated in the web link.
Danpeirce 06:14, 15 September 2007 (UTC)
Here is a picture of the insides of one. I'm guessing the beam has a similar PCB with grouped vertical bars at a different pitch and/or different widths. This would create a vernier scale and the differential capacitance could be interpreted like a regular offset encoder. —The preceding unsigned comment was added by AnotherBrian (talk • contribs) 08:16, 6 May 2007 (UTC).

[edit] What's the link or difference between a caliper and a (drafting) compass?

Both have links to navigation. Is it purely that a compass is used to create a circle, whereas a caliper is used to measure a distance betwee two points? 82.171.114.167 18:38, 10 October 2006 (UTC)

[edit] Proportional Caliper?

I haven't been able to find any information on Wikipedia for proportional calipers. Here is a link to one: http://www.toolpost.co.uk/pages/Turning_Tools/Measuring/measuring.html. They are used in scaling objects. Example: when taking a small clay figure and scaling it up to a large statue a proportional caliper is used to ensure the distances between points on the large and small figure have the same proportions. —Preceding unsigned comment added by 24.190.140.212 (talk) 13:37, 19 September 2007 (UTC)

[edit] Re hatnote removal: that's what hatnotes are for

Hi Alvesgaspar,

You removed the hatnotes from this article with comments "wrong place" and "Sorry, but that is not the subject of the article". But that's the whole point of a hatnote—to steer searchers who were looking for a different sense of the word toward the sense that they were seeking. The top of an article is not the wrong place for a hatnote linking to other senses; it's exactly the *right* place.

If your real reason for the edits was that you feel that "Caliper Corporation" shouldn't get "free advertising" of a sort by having its name in the hatnote here, you can circumvent the problem by changing the hatnote to {{otheruses}}, which would yield "For other uses, see Caliper (disambiguation)." This would have readers click through to a disambig page before seeing the Corp name.

I will go do that and solve both problems at once. (I.e., by both restoring the disambiguating capability of having a hatnote, and also avoiding the "ad"-like side-effect). — ¾-10 01:47, 21 February 2008 (UTC)

  • Yes, I think the {{otheruses}} solution, sending users to the disambiguation page is the best. -- Alvesgaspar (talk) 08:41, 21 February 2008 (UTC)