08-16-2013, 10:12 AM
(08-16-2013, 06:53 AM)DaveH Wrote: A good digital height gauge will be just as accurate as a dial or vernier one.
DaveH
Fixed that for you Dave...
I've got a few 'disposable' (China) digital gauges. 6-8" calipers and a height gauge. The problem with them is holding 'zero'. You close the jaws with the thumb wheel and hit the zero button and the display shows 0.0000". Remove your thumb and the display goes to 0.0005".
Or close the jaws, remove thumb, and hit zero button. The display flickers the negative (-) symbol or bounces back and forth between 0.0000" and +/- 0.0005". The way the jaws come together is just a little springy if that makes sense.
That's good enough for me for a quick rough measurement but if I'm splitting hairs I'll grab one of my Mitutoyo Absolute calipers. Once the jaws are clean and closed and set to zero it stays there. If I close the jaws and get a 0.0005" reading I know I've got a spec of dust between the jaws. A quick wipe with a sheet of paper and the display goes to 0.0000".
I've also got a Starrett vernier height gauge but that thing is a real workout on the eyes to use.
Willie