-edible zone-
Overhang: The distance past the spindle center-pin the stylus will
be when the tonearm is rotated over the spindle.
Pivot to Spindle
Distance: A straight line distance from the spindle axis to the
tonearm's axis of horizontal rotation.
Horizontal Pivot: An axis
of rotation allowing Horizontal swing of the tonearm.
Vertical
Pivot: An axis of rotation allowing Vertical swing of the tonearm.
Null Points:
Above flatbed image scan: This is the protractor that comes
with the HFNRR test record. (#HFN001) I like both the test record and
the protractor. Not to scale, so don't try to print and use.
There are many others to choose.
The null points as pictured in
the top 3d illustration and on the above picture of the HFNRR protractor
are two points of theoretical perfect tangency between the stylus and
the record groove. The exact position of the null points are designed to
give the tonearm/cartridge a calculated minimal tracking error when
tracking outside and between these two points.
note: all cad 3d
by site owner.