Assume calibrated means centered to spindle rotation axis, is this not SOP?
How close can one tweak it in? Line width and all that.
Nice scope on a Moore is neat but show me your six-sigma graph over 50 checks.
I so doubt .0002 very much but do agree this a way above average setup.
Bob
If you tried using one, you would understand, no fucking graphs and 50 dumb assed checks needed, it is just an aid to use the machine that is all it is.
Or simpler still, can a 6" rod be consistently chucked in a collett and run true at the end? If that works, then no problem with the scope, and good luck with that!
And, there it is, the Moore scope, the square part is the adapter for the Moore jig grinder.
Having the jigborer and scope for nearly two decades, the better application are more for measuring objects that are difficult to gage any other way, determining angles, when used with the rotary table, and alignment of objects on the table. Lookin at a scribed line, looks like a crooked nasty scrape.
When the scope is removed, and then returned, it is exact, as intended. These things on regular machines is not so popular, for the alignment reasons. Thus, they have disappeared from the market.
I posted these photos here a couple of years back. The first one, I somehow got of the reticle.
The inner circle of lines is spaced .002"
The outer circle is spaced .005"
The cross hairs are double, showing a space of .0005" between them-when focused on a work piece.
A practical measuring application here, it was requested the dimensions and angle of the rear sight dovetail slot on a Chi-com version of the Russian Tokarev military pistol, for custom replacement.
Using the optical sight, the machines DRO, and the rotary table, the slot was measured with reasonable accuracy, without removing the pistols rear sight.
The optical finder does not have to be centered with the spindle for measuring. For spindle to work location, it does.