Acoustical Systems SMARTractor Посібник користувача - Сторінка 6
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Side-kicks:
Reading the
Vernier scale
The SMARTractor features a Vernier scale to
allow precise read-out of the P2S with an
accuracy of 5/100 mm.
This Vernier scale runs right to left - as does the
metric scale with increasing distance of P2S.
If you are unfamiliar with a Vernier scale, please
get accustomed to its operation.
The white numbers 1- 9 over the black back-
ground are 1/10 of a mm each. The white lines
between numbers are 0.5/10 mm each - or
5/100 mm each.
Whenever any of the white lines is absolutely
in-line with a black line on the aluminum scale,
then it denominates the 5/100 value which has to
be added to the full mm value given between the
2 white "leaves" centered by the full vertical
white line on the left of the scale just before the
half-circle end.
To illustrate the read-out procedure, here are a
few examples of mounting distances for common
tonearms.
One will become accustom quite quickly to this
way of reading the scale.
The Vernier scale is an international standard in
industrial precision analog measuring.
This is 295,00 mm P2S - suitable for a FR-66s.
This is 231.5 mm P2S - the white "5" being in
line.
BTW: This is the perfect mounting distance for
the FR-64s.
The magnifier
Using the glass magnifier greatly increases the
visibility of the stylus when trying to align on
the single spot. It further also allows with most
modern cartridges to get a fairly good view of the
cantilever.
Place the magnifier in the cut-out frame on the
clear acrylic positioning arm and pull it all the
way forward so that it seats squarely against the
clear acrylic.
It is automatically in a position to optimize focus
when viewing through the glass lens on the
alignment spot for the selected tangential curve.
The cutout for the glass magnifier in the
acrylic positioning arm allows for adjusting the
side-to-side position of the glass magnifier to
accommodate all different positions of the 5
tangential curves on the SMARTractor.
6
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