Surface gauge project - video

[metric_taper]

Very nice tool build Paul.
I just got a new test indicator, Mitutoyo, 1micrometer resolution. Now I don't know if the test bar or the surface plate is an issue. It all looked good with the tenths indicator. Zeroing is a real challenge. Looks like this may have less sticktion/hysteresis then the normal surface gauge zeroing mechanism of tilting the spindle.
You wouldn't think 2.5 (2.54) times more resolution per tick would matter. I have a test bar that's precision ground about 1.5" round 8" long, I lay that on it's side, I can test for diameter with the tenths indicator, and over the length very little deviation, but with the micrometer indicator, I can see +/-2-3 tick differences. I was using a different surface gauge, but I'm thinking it's both the bar and the plate.