Figure 2-2.
Helican scan, tape transport
a. The location of the capstan will vary from manufacturer to manufacturer
and therefore, may be located either prior to the tape contacting the head drum
assembly, or after the head drum assembly, or both (figs 2-1 and 2-2).
In any
case, it will meter the tape past the head drum assembly.
(1) The combination of the capstan and the reel drive holdback tension
works together in a designed electromechanical combination to maintain proper
tension on the tape to keep the tape taut against the head drum assembly and in
good physical contact with the rotating video head.
(2) Both the takeup torque adjustments and holdback tension adjustments
require checking.
The exact amount of these adjustments will be peculiar to
specific machines.
2.
As the tape leaves the transport reel, it passes a fixed head which erases
the full width of the tape during the record mode.
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