IDTECH SecureHead User Manual page 18

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 crown of the head and the opposing slot wall should be a fraction of the
minimum card thickness (0.010 inches or 0.25mm). This is so the magnetic head will always
exert pressure on the card. The allows for proper contact of the head to stripe especially at
high speeds and any less movement could result in an unreliable reading.
5. Standard card thickness is 0.76mm±10%. If standard cards are used, the rule should be the
Apex of the head should be a maximum of 0.25mm from opposing card slot wall.
6. Adjust the distance the head is positioned from the opposing wall if a thicker or thinner card is
use. Adjustment requires a unique rail design with either wider or narrower card slot width.
minimum slot width is 1.03
The minimum slot width should be maximum card thickness plus 0.15~0.30mm. The suggested
7. The design should ensure there is no excessive force or deformation of head spring during or
after the head is assembled to prevent permanent deformation of the head spring. The head
spring must be mounted so that it is free to gimbal about the spring holes.
8. The bottom of the slot and the slot walls should not have any discontinuities and must
instead be flat.
9. The portion of the slot wall, about 10mm on each side of the magnetic head's crown, should
not have draft and must be perpendicular to the bottom of slot (reference surface). The slot
width in the lead-in and lead-out area should be greater and must have gradual transition
with no edges or angles to interfere with card swiping.
0.08
−0
when a standard card is issued.
SecureHead™ Demo Program
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