ID TECH SecureHead SPI with TMIV User Manual
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The center line of head should be parallel to the reference surface
4.
The card thickness must be considered when designing the rail and head
mounting. The distance between the head (located on the crown of the head) and
opposing wall of card slot must be positioned so that it has a minimum of 0.010
inches (0.25mm) movement when a minimum card thickness is swiped, any less
movement could result in unreliable reading. Or put another way: the distance
between the crown of the head and the opposing slot wall should be only a
fraction of the minimum card thickness that will slide through the reader, so the
magnetic head always exerts pressure on the card. The pressure allows for
proper contact of the head to stripe especially at high speeds.
5.
Standard card thickness is 0.76mm±10%, if only standard cards are to be used,
the rule should be the Apex (crown of head) of the head should be a maximum of
0.25mm from opposing card slot wall. If a thinner or thicker than standard card is
used, the distance the head is positioned from the opposing wall needs to be
adjusted (this will require a unique rail design with either wider or narrower card
slot width).
The minimum slot width should be maximum card thickness plus 0.15~0.30mm.
The suggested minimum slot width is 1.03+0.08 -0 mm when a standard card is
used.
6.
The design should ensure there is no excessive force or deformation of head
spring during the assembly of head to the rail or after head is assembled to
prevent permanent deformation of the head
7.
spring. The head spring must be mounted so that it is free to gimbal about the spring holes.