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Next, the lateral balance or azimuth must be set. Because the phono cartridge is offset, there is an unbalancing force that tilts the arm to one side. For the cartridge to properly track the record groove, the stylus must be ninety degrees to the record surface. Rotate the counterweight so a slight tracking force is applied and the stylus just sits on the record surface. At the bottom of the arm tube (upper) bearing housing is a ring with one flat section. Rotate this ring (see figure below) as needed to bring the arm into correct lateral balance. When the azimuth has been set, you can lightly tighten the set screw located on the side of the ring. To make this task easier make sure the armtube is parallel to the record surface.
90 degrees
AZIMUTH BALANCE RING TIP! The arm will tilt away from the flat portion of the ring. Turn the flat towards the side of the arm that is hanging down. Unlike other unipivot arms, the JMW�s lateral balance weight does not hang off to the side of the arm. Instead, its position around the bottom of the upper bearing housing places the weight below the pivot point. This increases mass below the pivot and increases arm stability.
ANTI-SKATING:
One of the least understood forces acting on a tonearm is anti-skating. Skating force is created by friction between the stylus and the record creating a force vector in a direction towards the center of the record. Putting a stylus down on a flat grooveless record will cause the arm to shoot in toward the center of the record. For years arm
