> In the end I developed my own test that proved the instrument was bad and got it swapped out for a new one. IIRC I think I determined it was acti...

> If you "unfold" the pattern of residuals to cover the full 360 degree arc, does it still show the same periodicity?Yes, but obviously a bit light...

Let's jump in the deep end!Trust me, it just looks like the data you've provided in previous threads, just heaps more. Your data may reveal similar pa...

Hello Kent,It depends on the phase of the error and whether is out of phase with itself or in phase 180* around. That's why for the plot I reduced all...

Hello Bill,About 52 targets. Groups of 5 so as to easily distinguish individual outliers on a plot as opposed to a real anomaly on that little part of...

TargetsHello rfc.These targets are run off from a laser printer, 10 mm apart. The horizontal line is to help 'level' the targets as any amount off ver...

Explain A 10" WhoopsieHello Paul,My own definition of a "10" whoopsie" was when in a network adjustment I would see directions in the same set cop res...

I can also add some extra information gleaned from the experiment.tribrach re-clamping in each stud position consistently produced values around the 0...

Thanks Shawn,Part of it was to fight my own ignorance about errors (or not) in modern total stations and to determine if the 'errors' i was seeing in ...

> Am I mistaken in thinking, though, that the other higher precision instruments in the same series as yours all have the same diameter circle? Tha...

Hello Kent,And that is why I went looking through our service reports the other day when I was sure the up to 10" error was real and present. There ar...

> 2" glass 5" glass? Ambient temerature? Manual turning auto turning? You can get consistent high quality measures with a 5" gun but procedures ar...

Here, just found this. Worth a look.ATR, EDM and other stuff.

> So the published resolution or "accuracy", e.g. 2", 3" 5" etc. is a function of the density of the cells in the CCD? Unless they're using lower d...

> Leica told me that all displays are the same but have different test results. The very good test result displays go into 1" cases. If the displ...

> the CMOS or CCD would need to be of enough pixel count to support the angular precision of the instrument but doesn't necessarily determine the a...

> Exactly. This is also how the manufacturers have improved searching to ignore reflected signals that aren't prisms. The shape of the "image" of t...

Hello foggyidea,I've noticed some 1" 1100 series instruments on ebay at the moment for pretty decent prices. I'd jump on one of those if I was in the ...

Hello rfc,Apparently the reflected laser beam is projected onto a CCD array, and from the 'image' on the array a calculation is performed to determine...