Another Leica Instrument oddity
Another Leica Instrument oddity
(OP)
A colleague of mine has been setting out using a Leica TC407. As an experiment they set out a point using the usual Leica 'setting out' program in the instrument using D-Hz and D-dist. Following this they scrolled down the instrument screen to the D-Length D-offset screen and put two points in 1.2m either side of the target point.
When they pulled a string line between the two offset points the target point was exactly half way along the line; but the target point was around 300mm CLOSER to the instrument than the string line. (exactly the opposite to what i would have expected if this was an error due to working with arcs).
They tried again with a second point and had the same result, both points were around 30m from the instrument. Does anyone have any experience of this, as i'm baffled
When they pulled a string line between the two offset points the target point was exactly half way along the line; but the target point was around 300mm CLOSER to the instrument than the string line. (exactly the opposite to what i would have expected if this was an error due to working with arcs).
They tried again with a second point and had the same result, both points were around 30m from the instrument. Does anyone have any experience of this, as i'm baffled





RE: Another Leica Instrument oddity
RE: Another Leica Instrument oddity
RE: Another Leica Instrument oddity
RE: Another Leica Instrument oddity
RE: Another Leica Instrument oddity
The 'target' pint was set out pretty traditionally, turning to the correct bearing 0deg in 'setting out' mode') and shooting the correct distance. Hence if it was a prism error, being constant throughout, the three points should have tied in. It's just an oddity. If no-one can figure it out, it's not critical, just be warned that it can crop up.
Cheers for the help
Al