11 Machine Control
This completes the instrument setup. The total station goes into Standby mode waiting for a
machine to connect to it. Tap Finish to confirm the machine control setup:
If you are tracking a machine and the target becomes lost for any reason, the total station continues
to turn at a constant horizontal and vertical speed for a short period, in the expectation that the
target will appear on the same trajectory when it clears the obstruction. A line-of-sight obstruction,
a passing vehicle, or simply losing the target because of movement speed can cause the total
station to lose the target. When the target is 'lost', that is, the above method failed to reacquire the
target, the total station searches for the target. The total station has two search modes:
Mode Description
Quick Search
Initiated as soon as the target is 'lost'. This search is centered on the last known
location, and inside a window defined by a horizontal angle width (for example,
15°) and a vertical angle width (for example, 15°). The machine control software
sets the values for the search window.
Full Search This search looks inside a larger window, defined by the dialog shown previously.
When the Quick Search mode fails to locate the target, the Full Search mode is
initiated.
Trimble SCS900 Site Controller Software User Guide 104