Adjustments; Capstan In And Capstan Out Sensing Switches - IBM 727 Manual Of Instruction

Magnetic tape unit and tester, electronic data-processing machines
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25.1
CAPSTAN-IN AND CAPSTAN-OUT SENSING SWITCHES
Adjust the sensing switches with adjusting fork C (Figure 34) so that the differ­
ential of the switch (the point where switch points transfer) is centered in the fork
gap.
Position the sensing switches on the outboard sides to sense capstan out.
this by pushing the capstan forward to drive position and aligning the permanent mag­
net position (B) with steel disc (A).
magnet is attracted to the steel disc with a minimum of .010 inch gap after it is
attracted.
With the assembly in this position, fasten it securely to the mounting
bracket.
Adjust the capstan-in switches in a similar manner except that the capstan
must be in its retracted position.
NOTE: To prevent marginal operation, the magnets should be attracted when
about 3/8 inch of the disc is opposite the magnet.
25.0

ADJUSTMENTS

The switch assembly should be set so that the
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