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Figure 5.2. Tracker Drive Mechanism
Zenith Drive
The middle gear on the zenith drive has a hole to allow a small drop of low temperature rated light
oil to be applied approximately once a year.
The Zenith drive gears can be cleaned with a lint-free cloth at the same time.
Cover Latches
In very moist climates, the internal mechanism of the cover latches can become rusted and become
very difficult to turn.
Applying a few drops of light oil periodically will help to prevent this annoyance.
Levelling Feet
In very moist climates the adjusting mechanism on the Tripod legs can become rusted, making
them impossible to turn.
Applying some grease to the exposed parts periodically will help to prevent this problem.
Micrometer
There may be occasions when the micrometer will have to be reset by hand, and the normal
settings are recorded on a log sheet on the Spectrometer Cover.
This problem may occur if the constant for Micrometer Offset, or the Micrometer Steps /Degree are
not correct, or if the mechanism becomes sticky.
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MKIV OPERATOR'S MANUAL
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