Spectra Precision Focus 30, Руководство пользователя

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Spectra Precision FOCUS 30 User Guide 83
6 Instrument Technology
StepDrive Motor System and Focus system
Spectra Precision FOCUS 30 Total Station is equipped with a StepDrive motor sys-
tem to position the instrument and the telescope and a servo drive to focus the tele-
scope.
Due to the instrument accuracy it is important to use a high quality tripod and tri-
brach. It is also important to set up the tripod in a position for best stability, see
Figure 6-6 . An unstable setup that could negatively influence the resulting measure-
ment precision.
Fig. 6-6 Tripod setup
Stable setup Unstable setup
StepDrive
The StepDrive motor system is a mechanical rough-fine drive system, which gives
high turning speeds and accuracy. The system provides endless horizontal and vertical
motion, including endless fine adjustment. The instrument uses a StepDrive motor
system when performing a number of different operations such as turning the hori-