Teac A-6300 - BRAKE TORQUE

BRAKE TORQUE
The brake torque is actuated mechanically. Pressure is set by the
variable spring force. While making these measurements and adjust¬
ments, be careful not to bend the brake bands. As brake torque will
change with cleaning, brake drums and brake shoes should be cleaned
only when absolutely necessary. If cleaning is required, use TEAC
cleaner TZ-261B. After cleaning operate the machine for a month
of normal operation before performing the procedures below.
Brake adjustments are made with _N0 power connected to the equip¬
ment .
1. Place an empty 2" hub reel on the left reel table, and fasten one
end of a 30" length of string to the reel anchor.
2. Wind several turns of string counterclockwise around the hub and
attach a suitable spring scale to the free end of the string.
3. Take a reading only when the reel is in steady motion since the
force required to overcome static friction will produce a false,
excessively high initial reading.
4. The reading should be 1000 g-cm ±200 g-cm.
5.. If adjustment is required, loosen the 2 screws shown and position
the brake for optimum torque.
6. The adjustment of the right brake is the same, with the exception
that rotations are clockwise. (Wind string CLOCKWISE around reel hub.)
NOTE: The difference in reading between the right and left brakes
should be kept within 100 g-cm.
To measure torque when using a reel with a hub radius of other than
5.0cm refer to the following page.
Fi g. 9-2 Torque Measurement and Brake Assy ADJ. Location
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