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List Info
Thread: Re: Focus problem
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| Re: Focus problem |
 
United States |
2007-02-26 10:34:51 |
Hello !
I am new to this forum, but I guess I will be back, as I
just
purchased a Coolscan 9000...
So, I have a new scanner, but I have not been able to use it
yet...
It was damaged in transport, and I had to send it back to
the
factory. Twice.
Now, it's back, but I have a problem with focusing : 120 and
135
films seem to be OK, but scans of mounted slides are blurry
(not just
soft). I tried manual focus, etc... nothing works.
I noticed that, even on unmounted film, the value of
autofocus is 1
or 2, on a scale of 1 to 450. This leads me to believe that
the
focusing range of the lens is not correctly adjusted.
Do you know how I could adjust it ?
I know I could send it back to the factory (it is still
under
warranty), but I also know I'll have to wait several weeks
to get it
back... and it may not function the next time either...
The link you have given is extremely helpful, and I guess I
could
access to the lens mechanism. But how should I adjust the
focusing
range, which I understand to be quite narrow ?
Thanks again !
Dan
--- In coolscan8000-9000@yahoogroups.com,
"pmoisseev" <mad4you ...>
wrote:
>
> Hi Don, I guess I know the answer.
>
> The focusing in CS9000 is done using lens move.
> It moves on rails, horisontally. The move is powered by
the
> separate motor, connected to spiral (helicoid) plastic
gear,
> which contacts the teeth's on lens carridge. The move
let is
> about 8 mm total, AND there is possibility that if the
carridge
> will move too far from the motor (i.e., to the front of
CS9000,
> i.e., to focus closer to the top of film sandvich) -
> it can get disconnected from the gear. I had this
problem.
>
> What you can do -
> . ask Nikon service to fix it
> . encourage yourself
>
> If you decide to fix it youself, you will have to
remove the CS
cover,
> then unbolt and gently move the plastic lens caridge
cover, to get
> the access to the gear-teeth junction, then you will
push the lens
> carridge back, helping manually to get the contact with
gear (rotate
> motor shift), then, gently clean things inside and
mount things
back.
>
> You will not dis-adjust sensitive parts, but take all
the
precautions.
> The good link for CS handling is
>
http://www.marginalsoftware.com/LS8000Note
s/cleaning_the_optics_of_the
_ls.htm
> and the page you are interested is
> http://www.marginalsoftware.com/LS8000Notes/i
mages/bottomchasis.jpg
> On the top right, you see the Motor (trace 2 wires) and
its gears,
> the helicoid gear is on the long shift right under the
"Main Lens"
> comment (covered by plastic).
> The motor is the stepped type, it has definite number
of
> steps to rotate from one stop to another. You should
place it to
> proper "end", manually rotating the small
round gear right on the
> motor, not the bigger round gear on the long shift.
Then gently move
> the lens carridge to get in touch and again rotate the
motor to
> place the carridge into the middle position. Now
assemble and test
> with removed cover to check the lens movement. Then
assemble the
> covers. Good luck!
>
>
> --- In coolscan8000-9000@yahoogroups.com,
"Don" <don> wrote:
> >
> > After almost two years, my 9000 has suddenly
stopped focusing. I
> focus manually with
> > Vuescan on glass sandwiched medium format
transparencies. I
usually
> do about five focus
> > points, and set it at the average number. I scan
one transparency
at
> a time.
> >
> > The scanner makes some unappealing buzzing and
grinding sounds as
it
> tries to focus, as if
> > something has fallen off a track. I tried manually
resetting the
> focus point to where it was
> > before the problem, and the preview scan was way
out of focus. I
> have examined my tray and
> > glass sandwich setup, and nothing appears any
different from how
it
> has always worked. I
> > use oversized Gepe anti-newton glass, and the
sandwich sits on the
> rubberized strip where
> > film would normally be. The two hold-down clips on
the FH-869S
> carrier have been removed.
> > Nothing is sticking up above the level of the
frame, and it goes
> into the scanner smoothly.
> >
> > If I have to open up the scanner, what should I
look for that
might
> either be jammed, or has
> > fallen off? Thank you,
> >
> > Don
> >
>
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|
| Re: Focus problem |
United States |
2007-02-26 11:46:21 |
Hi Dan,
first question - is the number changing during Auto focus?
If yes and considerably, the tray might be misplaced,
if no - you probably have the same problem as I had,
also after the transportation, the lens is in farest
position
from the sensor and out of contact with the spiral gear.
Reading reports on this, I came to an idea - this
misplacement
can happen if you nod the scanner, for example, put it on
the
ground, on the front panel. If this is the correct idea, the
healing
could (just could) be as simple as to nod it backwards and
switch it
on for a short time, just to let the stepping motor to try
to move
the lens. Otherwise, you will have to disassemble the
scanner heavily
to adjust the lens gears manually.
Pavel.
--- In coolscan8000-9000@yahoogroups.com, "Daniel
MASSE"
<daniel.masse6...> wrote:
>
> Hello !
>
> I am new to this forum, but I guess I will be back, as
I just
> purchased a Coolscan 9000...
>
> So, I have a new scanner, but I have not been able to
use it yet...
> It was damaged in transport, and I had to send it back
to the
> factory. Twice.
>
> Now, it's back, but I have a problem with focusing :
120 and 135
> films seem to be OK, but scans of mounted slides are
blurry (not just
> soft). I tried manual focus, etc... nothing works.
>
> I noticed that, even on unmounted film, the value of
autofocus is 1
> or 2, on a scale of 1 to 450. This leads me to believe
that the
> focusing range of the lens is not correctly adjusted.
>
> Do you know how I could adjust it ?
>
> I know I could send it back to the factory (it is still
under
> warranty), but I also know I'll have to wait several
weeks to get it
> back... and it may not function the next time
either...
>
> The link you have given is extremely helpful, and I
guess I could
> access to the lens mechanism. But how should I adjust
the focusing
> range, which I understand to be quite narrow ?
>
> Thanks again !
>
> Dan
>
>
> --- In coolscan8000-9000@yahoogroups.com,
"pmoisseev" <mad4you>
> wrote:
> >
> > Hi Don, I guess I know the answer.
> >
> > The focusing in CS9000 is done using lens move.
> > It moves on rails, horisontally. The move is
powered by the
> > separate motor, connected to spiral (helicoid)
plastic gear,
> > which contacts the teeth's on lens carridge. The
move let is
> > about 8 mm total, AND there is possibility that if
the carridge
> > will move too far from the motor (i.e., to the
front of CS9000,
> > i.e., to focus closer to the top of film sandvich)
-
> > it can get disconnected from the gear. I had this
problem.
> >
> > What you can do -
> > . ask Nikon service to fix it
> > . encourage yourself
> >
> > If you decide to fix it youself, you will have to
remove the CS
> cover,
> > then unbolt and gently move the plastic lens
caridge cover, to get
> > the access to the gear-teeth junction, then you
will push the lens
> > carridge back, helping manually to get the contact
with gear (rotate
> > motor shift), then, gently clean things inside and
mount things
> back.
> >
> > You will not dis-adjust sensitive parts, but take
all the
> precautions.
> > The good link for CS handling is
> >
> http://www.marginalsoftware.com/LS8000Note
s/cleaning_the_optics_of_the
> _ls.htm
> > and the page you are interested is
> > http://www.marginalsoftware.com/LS8000Notes/i
mages/bottomchasis.jpg
> > On the top right, you see the Motor (trace 2
wires) and its gears,
> > the helicoid gear is on the long shift right under
the "Main Lens"
> > comment (covered by plastic).
> > The motor is the stepped type, it has definite
number of
> > steps to rotate from one stop to another. You
should place it to
> > proper "end", manually rotating the
small round gear right on the
> > motor, not the bigger round gear on the long
shift. Then gently move
> > the lens carridge to get in touch and again rotate
the motor to
> > place the carridge into the middle position. Now
assemble and test
> > with removed cover to check the lens movement.
Then assemble the
> > covers. Good luck!
> >
> >
> > --- In coolscan8000-9000@yahoogroups.com,
"Don" <don> wrote:
> > >
> > > After almost two years, my 9000 has suddenly
stopped focusing. I
> > focus manually with
> > > Vuescan on glass sandwiched medium format
transparencies. I
> usually
> > do about five focus
> > > points, and set it at the average number. I
scan one transparency
> at
> > a time.
> > >
> > > The scanner makes some unappealing buzzing
and grinding sounds as
> it
> > tries to focus, as if
> > > something has fallen off a track. I tried
manually resetting the
> > focus point to where it was
> > > before the problem, and the preview scan was
way out of focus. I
> > have examined my tray and
> > > glass sandwich setup, and nothing appears any
different from how
> it
> > has always worked. I
> > > use oversized Gepe anti-newton glass, and the
sandwich sits on the
> > rubberized strip where
> > > film would normally be. The two hold-down
clips on the FH-869S
> > carrier have been removed.
> > > Nothing is sticking up above the level of the
frame, and it goes
> > into the scanner smoothly.
> > >
> > > If I have to open up the scanner, what should
I look for that
> might
> > either be jammed, or has
> > > fallen off? Thank you,
> > >
> > > Don
> > >
> >
>
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<*> Your email settings:
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