Scully 280B Series - Page 174

Addendum I, Model 280B
Constant Tension Feature
This centering is important
Setscrew
only
to avoid contact during
operation.
---'1-1. I
--t .r~
....
,
•
FI GURE 2a
FIGURE 2b
Tape tension adjust
Approximately 45° for
mi ni mum voltage.
~.
--1/2"
FIGURE 2c FIGURE 2d
Figure 2. Adjustment Procedures
h. Place a tape tensiometer on the tape between
capstan. Adjust spring on constant tension,
obtain proper tension as shown below:
O.25-in tape = 3.5 to 4.5 oz
O.SO-in tape = 7 to 8 oz
head bridge and
figure 2d, to
i. Close screw valve on airpot until the damping effect causes
arm to bounce as it returns to the stop. Open screw valve
enough to allow smooth travel of the arm. Open screw valve
complete rotation.
the
one
3