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21st February 2013, 07:43 PM #1Senior Member
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Fourth dimension on a dial caliper
OK, so be honest...how many of you knew about this fourth way to measure using your dial calipers? Until Andy Chidwick described it at the Woodworking Show here in Denver I never knew. The instructions that came with my calipers don't even mention it!
Second Wind Workshop: The Fourth Dimension
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21st February 2013 07:43 PM # ADSGoogle Adsense Advertisement
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22nd February 2013, 11:08 AM #2Skwair2rownd
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And I thought the 4th dimension was something from science fiction!
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22nd February 2013, 11:38 AM #3.
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- Feb 2006
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- Perth
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Neat - I like it!
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23rd February 2013, 02:50 AM #4
That's certainly a trick I was not aware of - thanks for passing the information along.
Dragonfly
No-one suspects the dragonfly!
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23rd February 2013, 07:37 PM #5
Wouldn't place too much credence in his ideas, he can't even read the awkward bloody thing.
Last pic/2nd last par he is on about 1 3/8 inch being exactly 30mm which it isn't (34. something), blow up the pic as he suggests to examine how this happens and it is showing 1 3/16 approx and 30mm approx. Attempted to leave a comment to point this out to him, needs a Captcha response but won't show the Captcha image. All sorts of wizzbang ways on his blog to share it, but nothing to make basic email contact with him.
As I wanted to point out to him if the thing had vernier scales instead of a stupid fractional dial, he could decent high accuracy measurements in both systems.I used to be an engineer, I'm not an engineer any more, but on the really good days I can remember when I was.
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24th February 2013, 04:35 AM #6Senior Member
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- Nov 2010
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- Lone Tree, Colorado, USA
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Thanks malb! Not only did I not catch that...you're the first one to mention it! Good eyes!
Not sure about the comments on the blog. I don't have anything locked down. I'll have to check it out...still a pretty basic blogger.
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24th February 2013, 10:06 AM #7
Ill stick with my digital calipers. Does all that a dial calipers will do and easier to read for us slightly older woodworkers.
Regards
John
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24th February 2013, 10:52 AM #8SENIOR MEMBER
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Woodworkers dont work in the same tolerance zone as metalworkers. I looked at the link and thought "so what" thats how you use vernier calipers.
A few weeks ago there was a Guy Williams UK series on restoring old technologies and they showed the rebuilding of an old fishing trawler
As he was cutting a trench to fit a new deck beam of 6 inch oak the voiceover said that the tolerance was a few thousandths of an inch or the structure would be weakened.
As an engineer and a woodworker I was amused, considering I could see daylight through the gap and the work was being carried out in an English winter undre cover from the heavy rain
BTW They didnt explain why a trench was required as there wasnt one there before and they were apparently "rebuilding"
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