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| Author: | nathanpeirson [ Mon Dec 03, 2018 8:51 pm ] |
| Post subject: | Reading thickness calipers |
I have put together a thickness caliper using a deep throat clamp (modified) and an attached a micrometer (typical DIY build). Since I've never actually used one, I am having difficulty reading the dial. When I move the wood, to be measured, around the dial, if I don't keep it perfectly flat (which isn't easy) it skews the dimension like crazy. how do you guys typically approach this issue? |
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| Author: | StevenWheeler [ Mon Dec 03, 2018 9:08 pm ] |
| Post subject: | Re: Reading thickness calipers |
A little practice is all it takes. Set the anvil in one spot and pivot the tool around until you find the smallest measurement, that is the thickness of your work piece. |
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| Author: | Trevor Gore [ Mon Dec 03, 2018 11:15 pm ] |
| Post subject: | Re: Reading thickness calipers |
Yes, you have to keep it flat. That's just how it is because of the geometry. The smaller the tip radius of the micrometer and the smaller the diameter of the anvil (they should both be domed) the less the sensitivity to tilt error, but the more sensitive you are to the tip falling into a "hole". The typical tip radius of the micrometer is usually only a millimeter or so, whilst the anvil may be 3-4mm. The electronic gauges have built in damping so are often slower to read than a mechanical gauge because the electronic ones can take a while to settle. |
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| Author: | Colin North [ Tue Dec 04, 2018 4:37 am ] |
| Post subject: | Re: Reading thickness calipers |
Mine sits on the bench and I move the workpiece. I read thickness, about every inch to start with, by first gently rocking the workpiece side to side until dial gauge shows a minimum reading. Then rock it gently front to back, until dial gauge shows a minimum reading, then check side to side. Minimum reading is thickness. Then move to the next spot, repeat. Gets quicker with practice. |
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