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GOOD HYPERBOLIC STYLUS
FIGURE
3A
WORN HYPERBOLIC STYLUS
FIGURE 38
GOOD HYPERELLIPTICAL STYLUS WORN HYPERELLIPTICAL STYLUS
FIGURE 4A FIGURE 48
A
good reference check on stylus condition is to use a new replacement
stylus as a standard. With the new stylus as a reference, it is easier to evaluate
the condition of the used stylus. Another useful test in demonstrating stylus
wear to a customer is to maintain a selection of new and worn styli near the mi-
croscope so the customer can readily compare his own stylus with both photos
and actual styli.
Remember that stylus wear is a continuing, not an overnight, process.
A
stylus used for only a relatively short time (a few hundred hours) will have small
wear spots. However, this does not mean that it must be replaced. After gaining
some experience with various degrees of wear, it will become easier to make
assessments of styli conditions. Note that there may be bubbles or crystal struc-
ture on the stylus shank; these are not important, as
only the stylus tip touches
the
record.