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Toshiba drifting mouse

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ht...@my-dejanews.com

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Oct 24, 1998, 3:00:00 AM10/24/98
to
Hi, can someone help me with this problem? i have a Toshiba 305CDS laptop
with an accupoint. The problem is sometimes the pointer would drift to one
side of the screen (most of the time the right side) and there's nothing I
can do to take it back to the other side using the accupoint. It would get
really sensitive going up and down though. I have taken it in and supposedly
they replaced some screw, but the problem still exists. Now I have to use an
external mouse(PS/2), and I have to use this to fight for control of the
pointer. My friend also has a Toshiba(later model) and has also experienced
this problem, but not as drastic as mine. Can someone tell me if this is a
common problem and how to fix it? Thanks in advance.

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Tam Thi Pham

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Oct 25, 1998, 2:00:00 AM10/25/98
to
Hi. I'm not sure, but what you're describing sounds like the "calibration"
feature of the Accupoint. This is an intended function that Toshiba
implemented. When the mouse starts to "drift", just let it drift for a few
seconds and then it should stop. Don't try to fight it, otherwise the
calibration becomes "off" and the mouse operation will be screwy. I'm
surprised that Toshiba didn't tell you anything about this when you took it
in.

Hope this helps,
Tam Pham


ht...@my-dejanews.com wrote in message <70tl3l$cvg$1...@nnrp1.dejanews.com>...

Al F.

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Oct 25, 1998, 2:00:00 AM10/25/98
to
I once had a similar problem with a 425CDS and noticed that it only happened
when I had the NB on a surface that was not quite level and the Accupoint
mechanism seem to build up a bias after a while on that particular surface.
But letting it go where it wanted, or moving it to the edge of the screen
to which it seemed to want to go, removed the bias and it worked fine for
a while again. On other surfaces, which I think were more level, the problem
never happened.

ht...@my-dejanews.com wrote in message <70tl3l$cvg$1...@nnrp1.dejanews.com>...
>Hi, can someone help me with this problem? i have a Toshiba 305CDS laptop
>with an accupoint. The problem is sometimes the pointer would drift to one
>side of the screen (most of the time the right side) and there's nothing I

ReBřřT

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Oct 28, 1998, 3:00:00 AM10/28/98
to
Tam Thi Pham wrote:
>
> Hi. I'm not sure, but what you're describing sounds like the "calibration"
> feature of the Accupoint. This is an intended function that Toshiba
> implemented. When the mouse starts to "drift", just let it drift for a few
> seconds and then it should stop. Don't try to fight it, otherwise the
> calibration becomes "off" and the mouse operation will be screwy. I'm
> surprised that Toshiba didn't tell you anything about this when you took it
> in.
<Snip>

How many times does the Accupoint mouse need Calibration?? And What
for???????? Are we launching the space shuttle with these laptops?!
For the life of me I still can not figure out why Toshiba implemented
this redundant ANNOYING feature that is even NOT even documented in ANY
user manual or Help file. Also this "calibration" doesn't seem to be
working as it is required to do so more then once every week on my Tecra
model. Not only my Accupoint drifts, it also becomes Stubborn one way
and smooth another way. Luckily most Toshiba models have a PS2 port for
an external mouse.


Al

--
Every morning is the dawn of a new error...

WMH

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Oct 28, 1998, 3:00:00 AM10/28/98
to
This is absolutely not a "calibration" issue. This is a known issue dealing
with the design of the system board and the connections and mounts for the
accupoint. Virtually every Sat Pro (400 through 430CDT) that I've had has
displayed this problem. It can be fixed, but only by a GOOD Toshiba
authorized service center. If the machine is still under warranty, I
recommend Microsolutions in Danbury CT. Call them, set up an RMA and send
the machine to them. I've had them fix several machines under warranty for
this very problem, and they've all been solved. There is NO "Calibration"
routine from Toshiba that will act like this in any way, shape or form,
period.

NightProwler

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Oct 28, 1998, 3:00:00 AM10/28/98
to
No you are wrong. The original poster has a 305CDS which is an entirely
DIFFERENT case and design. Please do not assume.

Mouse calibration is natural for point sticks. This will happen more often
if you tend to rest your finger on the pointer itself, applying the pressure
but not really moving your finger, This type of behavior tends to confuse
the point stick controller so it needs to reset itself periiodically.
Happens all the time.

WMH wrote in message ...

Hunga Bunga

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Oct 28, 1998, 3:00:00 AM10/28/98
to
Did the same thing on my 700CT as well. What I did to fix it was reload the
mouse driver. That always works for a while. Yeah, it is annoying. A PS/2
mouse is sure handy.

ReBřřT wrote:

> How many times does the Accupoint mouse need Calibration?? And What
> for???????? Are we launching the space shuttle with these laptops?!
> For the life of me I still can not figure out why Toshiba implemented
> this redundant ANNOYING feature that is even NOT even documented in ANY
> user manual or Help file. Also this "calibration" doesn't seem to be
> working as it is required to do so more then once every week on my Tecra
> model. Not only my Accupoint drifts, it also becomes Stubborn one way
> and smooth another way. Luckily most Toshiba models have a PS2 port for
> an external mouse.
>
> Al
>
> --
> Every morning is the dawn of a new error...

--
Hung Lieu
sl...@uswest.net


WMH

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Oct 28, 1998, 3:00:00 AM10/28/98
to
I'm very sorry, but I completely disagree with you. The 305CDS is a
somewhat different case and design, but not a completely different case and
design. I did not imply that they were the same. What I do know for a
fact, however, is that the Accupoint design used by Toshiba has remained
relatively constant for quite some time. Mechanically, it has only changed
slightly, and that occurred between the release of the 420CDT and the
430CDT. Even the 780's use the same basic design. There is no calibration
built in to any Toshiba, period, that will cause the drifting pointer
syndrome. This is a very well known though minor issue with many, many
Toshibas. I've owned literally dozens of Toshibas and have personally
experienced this across a wide variety of their product line, to include the
400, 2150, 5xx and 7xx series. My organization has literally hundreds of
these units, and has experienced this issue hundreds of times. That doesn't
make it a bad machine. It's not. I highly recommend Toshiba notebooks for
many users. However, it's not an intended action, and shouldn't happen.
Period. I've even seen 2xx and 3xx series machines go into the "drift" mode
when the pointer hasn't even been touched.


NightProwler wrote in message <7187nb$t3l$1...@ash.prod.itd.earthlink.net>...

Lucky

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Oct 29, 1998, 3:00:00 AM10/29/98
to
This will sound really silly, but here's a solution I've used on 4 separate
Toshibas in the last four years:

1) Remove the rubber trackpoint head
2) Blow on exposed plastic trackpoint thingy (real scientific)
3) Put the rubber trackpoint head back on

If need be, enclose these steps in a "DO - WHILE trackpoint_malfunction() =
TRUE" loop, but you'll only need to blow a few times on it.

I think there's some trackpoint fairy that seizes control of the unit every
once in a while. Blowing on it seems to incapacitate them.

Cheers,

Lucky

WMH <bi...@usaor.net> wrote in article <UVLZ1.212$k9.9...@news.sgi.net>...

ReBřřT

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Oct 30, 1998, 3:00:00 AM10/30/98
to
Lucky wrote:
>
> This will sound really silly, but here's a solution I've used on 4 separate
> Toshibas in the last four years:
>
> 1) Remove the rubber trackpoint head
> 2) Blow on exposed plastic trackpoint thingy (real scientific)
> 3) Put the rubber trackpoint head back on
>
> If need be, enclose these steps in a "DO - WHILE trackpoint_malfunction() =
> TRUE" loop, but you'll only need to blow a few times on it.
>
> I think there's some trackpoint fairy that seizes control of the unit every
> once in a while. Blowing on it seems to incapacitate them.
>
> Cheers,
>
> Lucky

4 years of blowing? hmmm... I dont think I want to touch that one.
Ive never tried it but maybe Ill keep a can of compressed air handy and
see what happens. I had no idea Toshiba laptops would be affected by
"blowing" on the accupoint.. Just out of curiosity, how on Earth did
you come to this conclusion?? ԿԬ
-

Alex Brin

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Oct 30, 1998, 3:00:00 AM10/30/98
to
This is normal for all such pointing "eraserheads" such as Toshiba's
Accupoint and IBM's Trackpoint devices. They're strain gauge devices
and they must redetect the "neutral" (or "center") values at regular
intervals to determine what the neutral (centered) values should be.
This is indeed an automatic recalibration function.

If it is happening often, it is likely because you're resting your
finger on the eraserhead when not actively positioning. And once the
calbration sequence starts to occur (e.g. mouse cursor starts to
"drift") what you should do is *remove* your finger from the
eraserhead and wait till the drift stops (that means its
recalibrated.)

If you try to compensate for drift by pushing on the eraserhead you
will just be causing it to recalibrate continuously. If you take your
finger off the pointing stick when the drift starts, it will stop
drifting within a few seconds and will generally stay calibrated for
extended periods as long as you follow the basic procedures.

As for the tip someone posted about "blowing" it clean that has no
effect other than to let the controller recalibrate in an unloaded
situation (e.g. your finger off it) while you're ineffectually blowing
on it, thinking that is the reason why the problem goes away. :)

Just lift your finger off it when the cursor starts to drift, and it
will stop in a second or so. Once you know the procedure, you'll find
that the drift becomes very rare indeed, because you're no longer
forcing the controller to assume the current pressure values (with
your finger *on* it but not moving) are in fact the neutral zone.

Hope this helps.

Alex
ajb...@cs.rit.edu

ReBřřT wrote in message <363778...@technologist.com>...


>Tam Thi Pham wrote:
>>
>> Hi. I'm not sure, but what you're describing sounds like the
"calibration"
>> feature of the Accupoint. This is an intended function that Toshiba
>> implemented. When the mouse starts to "drift", just let it drift
for a few
>> seconds and then it should stop. Don't try to fight it, otherwise
the
>> calibration becomes "off" and the mouse operation will be screwy.
I'm
>> surprised that Toshiba didn't tell you anything about this when you
took it
>> in.
><Snip>
>

>How many times does the Accupoint mouse need Calibration?? And What
>for???????? Are we launching the space shuttle with these laptops?!
> For the life of me I still can not figure out why Toshiba
implemented
>this redundant ANNOYING feature that is even NOT even documented in
ANY
>user manual or Help file. Also this "calibration" doesn't seem to be
>working as it is required to do so more then once every week on my
Tecra
>model. Not only my Accupoint drifts, it also becomes Stubborn one
way
>and smooth another way. Luckily most Toshiba models have a PS2 port
for
>an external mouse.
>
>

joh...@rof.net

unread,
Oct 31, 1998, 3:00:00 AM10/31/98
to
Alex,

Thanks for illuminating me on this one. I've had the same problem. Your
explanation was crystal clear.

John

Alex Brin wrote:

--
A conclusion is the place where you got tired of thinking.

lewa...@iname.com

unread,
Nov 19, 1998, 3:00:00 AM11/19/98
to
I chase the fairy away by pressing on the panel around the mouse. I don't
know why, but it works. I have had a 440/520/8000...they all exhibit this
problem. ric lewallen lewa...@mailandnews.com

In article <01bce44c$d25a1e20$d381...@farnanp.sapient.com>,


"Lucky" <adu...@sapient.com> wrote:
> This will sound really silly, but here's a solution I've used on 4 separate
> Toshibas in the last four years:
>
> 1) Remove the rubber trackpoint head
> 2) Blow on exposed plastic trackpoint thingy (real scientific)
> 3) Put the rubber trackpoint head back on
>
> If need be, enclose these steps in a "DO - WHILE trackpoint_malfunction() =
> TRUE" loop, but you'll only need to blow a few times on it.
>
> I think there's some trackpoint fairy that seizes control of the unit every
> once in a while. Blowing on it seems to incapacitate them.
>
> Cheers,
>
> Lucky
>

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