Rene Lamontagne wrote:
On 06/17/2018 6:40 PM, Ron C wrote:
On 6/16/2018 8:05 PM, Rene Lamontagne wrote:
On 06/16/2018 6:45 PM, Bill Ward wrote:
On 17/06/2018 00:31, Wolf K wrote:
On 2018-06-16 19:28, Bill Ward wrote:
On 16/06/2018 05:42, NotMe wrote:
[...]
All the screws are not visible, some are hidden under labels and
stickers. Takes about ten minutes to completely dissemble, worth
it for the magnets.
The magnets must be buried so deep as not to attract anything.
Bill.
Shielded by the steel case.
Right.
Bill.
The 2 magnets, 1 on each side of the voice coil are glued to the 2
mounting brackets which are made of Mu-Metal which is a magnetic
shielding material.
Rene
All this talk of hard drive disassembly and salvaging strong magnets
talk motivated me to take an old drive apart. No problem at all pulling
the cover, but somehow I can't seem to find these magnets or even that
voice coil thingy.
Maybe someone can point it out on my drive?
Here's a cover off top view:
https://www.dropbox.com/s/8lhnybzho0sgh5m/Z_4665.jpg
Else maybe it's somewhere underneath:
https://www.dropbox.com/s/p6ogcj5h9tlhjpp/Z_4649.jpg
Sorry Ron, I just don't recognize that drive at all, Maybe you could
give us a make and model.
Rene
The magnets are underneath the steel place in the
left part of the left-hand photo.
http://hddsurgery.com/blog/hdd-actuator
You can see the copper color of the voice
coil on the left, peeking out from underneath
the steel plate with the two major holes in it.
The magnets are underneath that steel plate,
in sandwich affair.
The drive on the right, uses a stepper to
position the arm. The drive on the right is
from a *much less dense* era. Using a stepper
is about as accurate as the mechanism on a
floppy drive.
Pick the part number off the ID plate on your
hard drive, and give us some numbers. Your
drive isn't an ST412 or ST506, as those use
a stepper translated to linear radial movement,
and the position of the arm actuator matches
neither picture above. The ST506 looks different
than both of those.
ST506 - linear actuator movement... Two motors.
No magnets.
http://images.computerhistory.org/st...allHDDs_P1.jpg
Paul