© 2004 Cayman Business
Systems
Rev:
Pre-G3 - Rendered Thursday,
February 12, 2004
Slide 204
Elsmar.com --- The
Cove!
8-Disciplines Problem Solving
Elsmar.com
Floppy Disk Poke-Yokes
Floppy disks have many poka-yokes built in. One example is you cannot insert the disk into the drive completely if the disk is upside down. This is because of the corner notch [#1].
720k disks have no hole [#2] while HD disks have hole (mechanism senses)[#3].
Spring loaded shutter mechanism - Do you remember the old 5.25 inch floppies from the early to mid-1980’s? Failsafe disk surface protection [#4].
Slide Tab to protect against erasure. Mechanism senses [#5].
‘Precision’ alignment. Disk
alignment holes and notches [#6] ensure the disk is properly aligned and also provides a ‘focus’ area for
manufacturing.
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