Posted by Mick B1 on 28/09/2020 09:36:00:
Posted by Tim Hammond on 28/09/2020 09:06:34:
I bought a Starrett digital caliper a couple of years ago, new, and all of these techniques were described in the instruction leaflet that came in the box…
Same when I bought a Mitutoyo vernier in 1976 – except you couldn't zero those at current setting
.
MickB1's note triggered a memory, because I bought a Mitutoyo dial caliper sometime in 1973 or 74, I still have it and it is still in very good condition. I am one of those terminally sad people who keeps instruction books or leaflets safely tucked away, and I was able to locate the booklet which came with the instrument – including the little metal "banjo" for resetting the gauge pinion on the rack. It advises only on how to read the dial gauge, no other uses, but also includes the following information:-
"For relative measurements, first measure the workpiece to be used as a master. With the dial at this measurement, loosen the bezel screw and set the dial to '0'. Comparative measurements and variations are now rapidly read on the dial."
I have to say that having used the digital caliper (metric) a great deal, I still prefer the older dial caliper and wish I 'd bought a metric version rather than the electronic wizard.