7 Apr
2012
7 Apr
'12
11:32 a.m.
I've disassembled probably a dozen failed HDAs by
now to see how they're
made, but the direction the platters are supposed to turn isn't obvious to
me... should it be 'into' the ends of the arms that carry the heads or
'away' from them? I always thought it should be 'away', so that the
pressure of the circulating air on the arms will lift the heads off the
platter, but on one HDA I took apart the heads tore off of the arms when I
gently turned the platter in the 'away' direction...
It's nearly always ''away' so the heads are not trying to dig into the
platters. I wonder if you had severe stiction so the heads were stuck to
the platters, which would mean they'd get ripped off whichever way you
turnd it.
-tony