stage motorization

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Charles Stevens Charles Stevens
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stage motorization


Dear List,
 
   We're planning to set up an inverted confocal microscope for live cell imaging. I'd appreciate any opinions on using manual vs x-y motorized stage. Is the motorized stage more stabile during long-term experiments? Does it facilitate/is it necessary for any experiments besides multi-point time-lapse imaging?
   Thanks for your comments!
 
  Charles


Craig Brideau Craig Brideau
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Re: stage motorization

A motorized stage will not necessarily be more stable than a
non-motorized stage.  It mainly depends on the bearing system.  The
motor just replaces your finger turning a shaft in most cases, so it
all really boils down to the mechanics of how the shaft is geared and
the bearing system the stage is resting on.  That said, a motorized
stage with active correction built in, like 'Perfect Focus' will 'lock
on' to a given position and actively maintain it.  More generally
speaking, if your room is fairly temperature stable, your microscope
is vibration free, and your ventilation system is not turbulent, you
should get decent stability from most good quality stages, either
manual or motorized.  At the end of the day though, it will all
revolve around your specific case; how much movement can you tolerate
within what timeframe?  You will need to verify that the specs of the
stage match your requirements.  Even then, you will probably need to
test it out to be sure.

Craig

On Mon, Jan 25, 2010 at 9:56 AM, Charles Stevens <[hidden email]> wrote:

>
> Dear List,
>
>    We're planning to set up an inverted confocal microscope for live cell
> imaging. I'd appreciate any opinions on using manual vs x-y motorized stage.
> Is the motorized stage more stabile during long-term experiments? Does it
> facilitate/is it necessary for any experiments besides multi-point
> time-lapse imaging?
>    Thanks for your comments!
>
>   Charles
>
>
Paul Herzmark Paul Herzmark
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Re: stage motorization

The Nikon Perfect Focus controls Z (focus) stability of the objective and does not affect the X or Y stability. It works independently of the stage so you can have it with a motorized, manual or fixed stage.

In time-lapse imaging using Perfect Focus I frequently see nicely in-focus cells drifting together to the side as the room temperature changes. It is the stage moving.



Paul Herzmark
Specialist
[hidden email]

Department of Molecular and Cell Biology
479 Life Science Addition
University of California, Berkeley
Berkeley, CA  94720-3200
(510) 643-9603
(510) 643-9500 fax


On Mon, Jan 25, 2010 at 11:08 AM, Craig Brideau <[hidden email]> wrote:
A motorized stage will not necessarily be more stable than a
non-motorized stage.  It mainly depends on the bearing system.  The
motor just replaces your finger turning a shaft in most cases, so it
all really boils down to the mechanics of how the shaft is geared and
the bearing system the stage is resting on.  That said, a motorized
stage with active correction built in, like 'Perfect Focus' will 'lock
on' to a given position and actively maintain it.  More generally
speaking, if your room is fairly temperature stable, your microscope
is vibration free, and your ventilation system is not turbulent, you
should get decent stability from most good quality stages, either
manual or motorized.  At the end of the day though, it will all
revolve around your specific case; how much movement can you tolerate
within what timeframe?  You will need to verify that the specs of the
stage match your requirements.  Even then, you will probably need to
test it out to be sure.

Craig

On Mon, Jan 25, 2010 at 9:56 AM, Charles Stevens <[hidden email]> wrote:
>
> Dear List,
>
>    We're planning to set up an inverted confocal microscope for live cell
> imaging. I'd appreciate any opinions on using manual vs x-y motorized stage.
> Is the motorized stage more stabile during long-term experiments? Does it
> facilitate/is it necessary for any experiments besides multi-point
> time-lapse imaging?
>    Thanks for your comments!
>
>   Charles
>
>

Cameron Nowell Cameron Nowell
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Re: stage motorization

In reply to this post by Charles Stevens
Hi Charles,
 
A motorised stage can also be used to create montage/tile scans of larger areas. This can give some pretty impressive resultsbut can take a long time to capture (e.g 4x4 fields of view with 30 slices is 16 normal Z series captures).
 
 
Cheers
 
 
Cam
 
 
Cameron J. Nowell
Microscpy Manager
Central Resource for Advanced Microscopy
Ludwig Insttue for Cancer Research
PO Box 2008
Royal Melbourne Hospital
Victoria, 3050
AUSTRALIA
 
Office: +61 3 9341 3155
Mobile: +61422882700
Fax: +61 3 9341 3104
 
http://www.ludwig.edu.au/branch/research/platform/microscopy.htm
 

________________________________

From: Confocal Microscopy List on behalf of Charles Stevens
Sent: Tue 26/01/2010 3:56 AM
To: [hidden email]
Subject: stage motorization



Dear List,
 
   We're planning to set up an inverted confocal microscope for live cell imaging. I'd appreciate any opinions on using manual vs x-y motorized stage. Is the motorized stage more stabile during long-term experiments? Does it facilitate/is it necessary for any experiments besides multi-point time-lapse imaging?
   Thanks for your comments!
 
  Charles
leoncio vergara leoncio vergara
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Re: stage motorization

I don't think there is any reason for a motorized stage to be more stable than a regular one... if you are not considering multipoint or tiling, maybe you could do without one....
________________________________________
From: Confocal Microscopy List [[hidden email]] On Behalf Of Cameron Nowell [[hidden email]]
Sent: Monday, January 25, 2010 3:40 PM
To: [hidden email]
Subject: Re: stage motorization

Hi Charles,

A motorised stage can also be used to create montage/tile scans of larger areas. This can give some pretty impressive resultsbut can take a long time to capture (e.g 4x4 fields of view with 30 slices is 16 normal Z series captures).


Cheers


Cam


Cameron J. Nowell
Microscpy Manager
Central Resource for Advanced Microscopy
Ludwig Insttue for Cancer Research
PO Box 2008
Royal Melbourne Hospital
Victoria, 3050
AUSTRALIA

Office: +61 3 9341 3155
Mobile: +61422882700
Fax: +61 3 9341 3104

http://www.ludwig.edu.au/branch/research/platform/microscopy.htm


________________________________

From: Confocal Microscopy List on behalf of Charles Stevens
Sent: Tue 26/01/2010 3:56 AM
To: [hidden email]
Subject: stage motorization



Dear List,

   We're planning to set up an inverted confocal microscope for live cell imaging. I'd appreciate any opinions on using manual vs x-y motorized stage. Is the motorized stage more stabile during long-term experiments? Does it facilitate/is it necessary for any experiments besides multi-point time-lapse imaging?
   Thanks for your comments!

  Charles
Keith Morris Keith Morris
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Re: stage motorization

In reply to this post by Craig Brideau
I agree with all the previous comments, but from our point of view:

Personally I'd always buy a motorized stage, whether time-lapse is involved
or not - although this does assume it's on a more expensive fully motorized
microscope [filter wheels/focus]. Back in the days when I bought my own
microscopes they always came with one. In recent places I have worked at,
the confocals have arrived before my time, and a manual stage has always
been fitting and XY drift during long time-lapse [say 78 hours] is an issue.
It's not such that the time lapse can't be done but it is irritating. I say
drift, but normally it's more a small jump or two that's clearly not cell
movement [no doubt tension stored in the screw rack somewhere releasing
itself or 'vibration/thermal expansion'].

We have a manual XY stage now on our otherwise motorized time-lapse Zeiss
510 Meta confocal and really miss the ability to go back to the same
location [say take one live cell photo every day at the same place], or to
time-lapse multiple wells, perhaps with different fluorochrome labels [and
get the reduced stage drift]. If a motorized stage had been specified in the
original quote we would got it for 'free' [if a confocal costs a £220,000 or
£230,000 it's not going to make much difference to whether the purchase goes
ahead, but trying to raise £20,000 after the confocal arrived will be a very
different matter. Ensure you have all the right time-lapse/3D/FRET/FRAP
modules you require factored into the quote as well [they are £5k each
afterwards], and the required phase contrast objectives for time lapse [air
Ph 20x at least, DIC isn't really good enough for transmission cell motility
time-lapse - we don't have a standard fluorescence/brightfield microscope
time-lapse system]. With multiple wells you might want to add a
non-immersion air hi-power objective as the oil won't easily move across.

A motorized stage will also allow a complete automated raster scan image of
a fixed slide [ideally via say Zeiss Axiovision and a separate CCD camera -
both ideal for transmission time-lapse], something else we really miss not
being to do. Likewise we could have automated metaphase finding, scoring and
relocation with our cytogenetics FISH workstation, but that has a manual
stage as well adding hours to our weekly routines [not 'confocal' I know,
but that missing motorized stage is still a pain].

We have just bought a large Zeiss XL3 incubator, TempControl & CO2 system
that protects the manual stage/objectives from drift somewhat during
time-lapse, but are now, as most users are asking for one, trying to raise
yet another £20k for the Zeiss motorized stage and associated control module
[plus another £5k for the FRET module], and it's probably going to take a
long while for the stage funding to appear.

The Zeiss motorized XY stage software module also allows us to have a
variable time-lapse: say 10 mins at one time interval and then the next 6
hours at a longer one [which our present 'physiology' module can't do].
Shame we never got it all with the microscope in the first place [and then
it probably would have attracted a large discount].

Good luck with the purchase anyway

Keith
---------------------------------------------------------------------------
Dr Keith J. Morris,
Molecular Cytogenetics and Microscopy Core,
Laboratory 00/069 and 00/070,
The Wellcome Trust Centre for Human Genetics,
Roosevelt Drive,
Oxford  OX3 7BN,
United Kingdom.

Telephone:  +44 (0)1865 287568
Email:  [hidden email]
Web-pages: http://www.well.ox.ac.uk/molecular-cytogenetics-and-microscopy

-----Original Message-----
From: Confocal Microscopy List [mailto:[hidden email]] On
Behalf Of Craig Brideau
Sent: 25 January 2010 19:08
To: [hidden email]
Subject: Re: stage motorization

A motorized stage will not necessarily be more stable than a
non-motorized stage.  It mainly depends on the bearing system.  The
motor just replaces your finger turning a shaft in most cases, so it
all really boils down to the mechanics of how the shaft is geared and
the bearing system the stage is resting on.  That said, a motorized
stage with active correction built in, like 'Perfect Focus' will 'lock
on' to a given position and actively maintain it.  More generally
speaking, if your room is fairly temperature stable, your microscope
is vibration free, and your ventilation system is not turbulent, you
should get decent stability from most good quality stages, either
manual or motorized.  At the end of the day though, it will all
revolve around your specific case; how much movement can you tolerate
within what timeframe?  You will need to verify that the specs of the
stage match your requirements.  Even then, you will probably need to
test it out to be sure.

Craig

On Mon, Jan 25, 2010 at 9:56 AM, Charles Stevens <[hidden email]>
wrote:
>
> Dear List,
>
>    We're planning to set up an inverted confocal microscope for live cell
> imaging. I'd appreciate any opinions on using manual vs x-y motorized
stage.
> Is the motorized stage more stabile during long-term experiments? Does it
> facilitate/is it necessary for any experiments besides multi-point
> time-lapse imaging?
>    Thanks for your comments!
>
>   Charles
>
>
Guy Cox Guy Cox
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Re: stage motorization

Keith,

           This is intriguing.  I suppose most of us started our careers having to make the best out of whatever was in the lab, and then got to the stage where we could specify our own equipment.  How did you find yourself going in the reverse direction?

                                    Guy

Optical Imaging Techniques in Cell Biology
by Guy Cox    CRC Press / Taylor & Francis
     http://www.guycox.com/optical.htm
______________________________________________
Associate Professor Guy Cox, MA, DPhil(Oxon)
Electron Microscope Unit, Madsen Building F09,
University of Sydney, NSW 2006

Phone +61 2 9351 3176     Fax +61 2 9351 7682
             Mobile 0413 281 861
______________________________________________
      http://www.guycox.net
 


-----Original Message-----
From: Confocal Microscopy List [mailto:[hidden email]] On Behalf Of Keith Morris
Sent: Tuesday, 26 January 2010 9:27 PM
To: [hidden email]
Subject: Re: stage motorization

I agree with all the previous comments, but from our point of view:

Personally I'd always buy a motorized stage, whether time-lapse is involved
or not - although this does assume it's on a more expensive fully motorized
microscope [filter wheels/focus]. Back in the days when I bought my own
microscopes they always came with one. In recent places I have worked at,
the confocals have arrived before my time, and a manual stage has always
been fitting and XY drift during long time-lapse [say 78 hours] is an issue.
It's not such that the time lapse can't be done but it is irritating. I say
drift, but normally it's more a small jump or two that's clearly not cell
movement [no doubt tension stored in the screw rack somewhere releasing
itself or 'vibration/thermal expansion'].

We have a manual XY stage now on our otherwise motorized time-lapse Zeiss
510 Meta confocal and really miss the ability to go back to the same
location [say take one live cell photo every day at the same place], or to
time-lapse multiple wells, perhaps with different fluorochrome labels [and
get the reduced stage drift]. If a motorized stage had been specified in the
original quote we would got it for 'free' [if a confocal costs a £220,000 or
£230,000 it's not going to make much difference to whether the purchase goes
ahead, but trying to raise £20,000 after the confocal arrived will be a very
different matter. Ensure you have all the right time-lapse/3D/FRET/FRAP
modules you require factored into the quote as well [they are £5k each
afterwards], and the required phase contrast objectives for time lapse [air
Ph 20x at least, DIC isn't really good enough for transmission cell motility
time-lapse - we don't have a standard fluorescence/brightfield microscope
time-lapse system]. With multiple wells you might want to add a
non-immersion air hi-power objective as the oil won't easily move across.

A motorized stage will also allow a complete automated raster scan image of
a fixed slide [ideally via say Zeiss Axiovision and a separate CCD camera -
both ideal for transmission time-lapse], something else we really miss not
being to do. Likewise we could have automated metaphase finding, scoring and
relocation with our cytogenetics FISH workstation, but that has a manual
stage as well adding hours to our weekly routines [not 'confocal' I know,
but that missing motorized stage is still a pain].

We have just bought a large Zeiss XL3 incubator, TempControl & CO2 system
that protects the manual stage/objectives from drift somewhat during
time-lapse, but are now, as most users are asking for one, trying to raise
yet another £20k for the Zeiss motorized stage and associated control module
[plus another £5k for the FRET module], and it's probably going to take a
long while for the stage funding to appear.

The Zeiss motorized XY stage software module also allows us to have a
variable time-lapse: say 10 mins at one time interval and then the next 6
hours at a longer one [which our present 'physiology' module can't do].
Shame we never got it all with the microscope in the first place [and then
it probably would have attracted a large discount].

Good luck with the purchase anyway

Keith
---------------------------------------------------------------------------
Dr Keith J. Morris,
Molecular Cytogenetics and Microscopy Core,
Laboratory 00/069 and 00/070,
The Wellcome Trust Centre for Human Genetics,
Roosevelt Drive,
Oxford  OX3 7BN,
United Kingdom.

Telephone:  +44 (0)1865 287568
Email:  [hidden email]
Web-pages: http://www.well.ox.ac.uk/molecular-cytogenetics-and-microscopy

-----Original Message-----
From: Confocal Microscopy List [mailto:[hidden email]] On
Behalf Of Craig Brideau
Sent: 25 January 2010 19:08
To: [hidden email]
Subject: Re: stage motorization

A motorized stage will not necessarily be more stable than a
non-motorized stage.  It mainly depends on the bearing system.  The
motor just replaces your finger turning a shaft in most cases, so it
all really boils down to the mechanics of how the shaft is geared and
the bearing system the stage is resting on.  That said, a motorized
stage with active correction built in, like 'Perfect Focus' will 'lock
on' to a given position and actively maintain it.  More generally
speaking, if your room is fairly temperature stable, your microscope
is vibration free, and your ventilation system is not turbulent, you
should get decent stability from most good quality stages, either
manual or motorized.  At the end of the day though, it will all
revolve around your specific case; how much movement can you tolerate
within what timeframe?  You will need to verify that the specs of the
stage match your requirements.  Even then, you will probably need to
test it out to be sure.

Craig

On Mon, Jan 25, 2010 at 9:56 AM, Charles Stevens <[hidden email]>
wrote:
>
> Dear List,
>
>    We're planning to set up an inverted confocal microscope for live cell
> imaging. I'd appreciate any opinions on using manual vs x-y motorized
stage.
> Is the motorized stage more stabile during long-term experiments? Does it
> facilitate/is it necessary for any experiments besides multi-point
> time-lapse imaging?
>    Thanks for your comments!
>
>   Charles
>
>

No virus found in this incoming message.
Checked by AVG - www.avg.com
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leoncio vergara leoncio vergara
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Re: stage motorization

In reply to this post by Keith Morris
I think you are absolutely right.... despite the stability issues, having a motorized stage in your system really add to the capabilities and the possibility to do multi-locations is a real advantage.

One has to remember however that for multi-location work you absolutely need a good fast autofocus system, this adds to the cost if budget is concern, but a the stage alone would not be enough... even if the company tells you that their microscopes are extremely stable.... .


________________________________________
From: Confocal Microscopy List [[hidden email]] On Behalf Of Keith Morris [[hidden email]]
Sent: Tuesday, January 26, 2010 4:26 AM
To: [hidden email]
Subject: Re: stage motorization

I agree with all the previous comments, but from our point of view:

Personally I'd always buy a motorized stage, whether time-lapse is involved
or not - although this does assume it's on a more expensive fully motorized
microscope [filter wheels/focus]. Back in the days when I bought my own
microscopes they always came with one. In recent places I have worked at,
the confocals have arrived before my time, and a manual stage has always
been fitting and XY drift during long time-lapse [say 78 hours] is an issue.
It's not such that the time lapse can't be done but it is irritating. I say
drift, but normally it's more a small jump or two that's clearly not cell
movement [no doubt tension stored in the screw rack somewhere releasing
itself or 'vibration/thermal expansion'].

We have a manual XY stage now on our otherwise motorized time-lapse Zeiss
510 Meta confocal and really miss the ability to go back to the same
location [say take one live cell photo every day at the same place], or to
time-lapse multiple wells, perhaps with different fluorochrome labels [and
get the reduced stage drift]. If a motorized stage had been specified in the
original quote we would got it for 'free' [if a confocal costs a £220,000 or
£230,000 it's not going to make much difference to whether the purchase goes
ahead, but trying to raise £20,000 after the confocal arrived will be a very
different matter. Ensure you have all the right time-lapse/3D/FRET/FRAP
modules you require factored into the quote as well [they are £5k each
afterwards], and the required phase contrast objectives for time lapse [air
Ph 20x at least, DIC isn't really good enough for transmission cell motility
time-lapse - we don't have a standard fluorescence/brightfield microscope
time-lapse system]. With multiple wells you might want to add a
non-immersion air hi-power objective as the oil won't easily move across.

A motorized stage will also allow a complete automated raster scan image of
a fixed slide [ideally via say Zeiss Axiovision and a separate CCD camera -
both ideal for transmission time-lapse], something else we really miss not
being to do. Likewise we could have automated metaphase finding, scoring and
relocation with our cytogenetics FISH workstation, but that has a manual
stage as well adding hours to our weekly routines [not 'confocal' I know,
but that missing motorized stage is still a pain].

We have just bought a large Zeiss XL3 incubator, TempControl & CO2 system
that protects the manual stage/objectives from drift somewhat during
time-lapse, but are now, as most users are asking for one, trying to raise
yet another £20k for the Zeiss motorized stage and associated control module
[plus another £5k for the FRET module], and it's probably going to take a
long while for the stage funding to appear.

The Zeiss motorized XY stage software module also allows us to have a
variable time-lapse: say 10 mins at one time interval and then the next 6
hours at a longer one [which our present 'physiology' module can't do].
Shame we never got it all with the microscope in the first place [and then
it probably would have attracted a large discount].

Good luck with the purchase anyway

Keith
---------------------------------------------------------------------------
Dr Keith J. Morris,
Molecular Cytogenetics and Microscopy Core,
Laboratory 00/069 and 00/070,
The Wellcome Trust Centre for Human Genetics,
Roosevelt Drive,
Oxford  OX3 7BN,
United Kingdom.

Telephone:  +44 (0)1865 287568
Email:  [hidden email]
Web-pages: http://www.well.ox.ac.uk/molecular-cytogenetics-and-microscopy

-----Original Message-----
From: Confocal Microscopy List [mailto:[hidden email]] On
Behalf Of Craig Brideau
Sent: 25 January 2010 19:08
To: [hidden email]
Subject: Re: stage motorization

A motorized stage will not necessarily be more stable than a
non-motorized stage.  It mainly depends on the bearing system.  The
motor just replaces your finger turning a shaft in most cases, so it
all really boils down to the mechanics of how the shaft is geared and
the bearing system the stage is resting on.  That said, a motorized
stage with active correction built in, like 'Perfect Focus' will 'lock
on' to a given position and actively maintain it.  More generally
speaking, if your room is fairly temperature stable, your microscope
is vibration free, and your ventilation system is not turbulent, you
should get decent stability from most good quality stages, either
manual or motorized.  At the end of the day though, it will all
revolve around your specific case; how much movement can you tolerate
within what timeframe?  You will need to verify that the specs of the
stage match your requirements.  Even then, you will probably need to
test it out to be sure.

Craig

On Mon, Jan 25, 2010 at 9:56 AM, Charles Stevens <[hidden email]>
wrote:
>
> Dear List,
>
>    We're planning to set up an inverted confocal microscope for live cell
> imaging. I'd appreciate any opinions on using manual vs x-y motorized
stage.
> Is the motorized stage more stabile during long-term experiments? Does it
> facilitate/is it necessary for any experiments besides multi-point
> time-lapse imaging?
>    Thanks for your comments!
>
>   Charles
>
>
Keith Morris Keith Morris
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Open this post in threaded view
|

Re: stage motorization

In reply to this post by Guy Cox
Regarding Guy's question:


I too started in the lab with nothing but the notebook and pencil I was born
with [to be later replaced with a black biro for independent GLP auditing by
the LRQA].

After my post-doc at MRC Harwell, I moved 600 yards to the Atomic Energy
Authorities [UKAEA] Harwell Laboratory [funded directly by the UK Dept of
Energy and Dept of Health, and also with large commercial contracts] - in
its Heyday this UKAEA Harwell site alone had 12 nuclear reactors [bit like
the Woomera site in Oz and Los Alamos in the US]. And with great wealth came
great microscopes, and subsequently great financial cuts [or 'privitisation'
as Thatcher called it back then]. I also worked at the Harwell site for so
long [15 years] that I actually had input into the microscope purchases and
they arrived before I had to leave for another post.

In these modern times, the nomadic life of the scientist combined with the
time it now takes to raise the cash tends to mean the microscopes are often
already here when I arrive, or the new ones arrive after I've left.



Keith

---------------------------------------------------------------------------
Dr Keith J. Morris,
Molecular Cytogenetics and Microscopy Core,
Laboratory 00/069 and 00/070,
The Wellcome Trust Centre for Human Genetics,
Roosevelt Drive,
Oxford  OX3 7BN,
United Kingdom.

Telephone:  +44 (0)1865 287568
Email:  [hidden email]
Web-pages: http://www.well.ox.ac.uk/molecular-cytogenetics-and-microscopy


-----Original Message-----
From: Confocal Microscopy List [mailto:[hidden email]] On
Behalf Of Guy Cox
Sent: 26 January 2010 10:35
To: [hidden email]
Subject: Re: stage motorization

Keith,

           This is intriguing.  I suppose most of us started our careers
having to make the best out of whatever was in the lab, and then got to the
stage where we could specify our own equipment.  How did you find yourself
going in the reverse direction?




                                    Guy

Optical Imaging Techniques in Cell Biology
by Guy Cox    CRC Press / Taylor & Francis
     http://www.guycox.com/optical.htm
______________________________________________
Associate Professor Guy Cox, MA, DPhil(Oxon)
Electron Microscope Unit, Madsen Building F09,
University of Sydney, NSW 2006

Phone +61 2 9351 3176     Fax +61 2 9351 7682
             Mobile 0413 281 861
______________________________________________
      http://www.guycox.net
 


-----Original Message-----
From: Confocal Microscopy List [mailto:[hidden email]] On
Behalf Of Keith Morris
Sent: Tuesday, 26 January 2010 9:27 PM
To: [hidden email]
Subject: Re: stage motorization

I agree with all the previous comments, but from our point of view:

Personally I'd always buy a motorized stage, whether time-lapse is involved
or not - although this does assume it's on a more expensive fully motorized
microscope [filter wheels/focus]. Back in the days when I bought my own
microscopes they always came with one. In recent places I have worked at,
the confocals have arrived before my time, and a manual stage has always
been fitting and XY drift during long time-lapse [say 78 hours] is an issue.
It's not such that the time lapse can't be done but it is irritating. I say
drift, but normally it's more a small jump or two that's clearly not cell
movement [no doubt tension stored in the screw rack somewhere releasing
itself or 'vibration/thermal expansion'].

We have a manual XY stage now on our otherwise motorized time-lapse Zeiss
510 Meta confocal and really miss the ability to go back to the same
location [say take one live cell photo every day at the same place], or to
time-lapse multiple wells, perhaps with different fluorochrome labels [and
get the reduced stage drift]. If a motorized stage had been specified in the
original quote we would got it for 'free' [if a confocal costs a £220,000 or
£230,000 it's not going to make much difference to whether the purchase goes
ahead, but trying to raise £20,000 after the confocal arrived will be a very
different matter. Ensure you have all the right time-lapse/3D/FRET/FRAP
modules you require factored into the quote as well [they are £5k each
afterwards], and the required phase contrast objectives for time lapse [air
Ph 20x at least, DIC isn't really good enough for transmission cell motility
time-lapse - we don't have a standard fluorescence/brightfield microscope
time-lapse system]. With multiple wells you might want to add a
non-immersion air hi-power objective as the oil won't easily move across.

A motorized stage will also allow a complete automated raster scan image of
a fixed slide [ideally via say Zeiss Axiovision and a separate CCD camera -
both ideal for transmission time-lapse], something else we really miss not
being to do. Likewise we could have automated metaphase finding, scoring and
relocation with our cytogenetics FISH workstation, but that has a manual
stage as well adding hours to our weekly routines [not 'confocal' I know,
but that missing motorized stage is still a pain].

We have just bought a large Zeiss XL3 incubator, TempControl & CO2 system
that protects the manual stage/objectives from drift somewhat during
time-lapse, but are now, as most users are asking for one, trying to raise
yet another £20k for the Zeiss motorized stage and associated control module
[plus another £5k for the FRET module], and it's probably going to take a
long while for the stage funding to appear.

The Zeiss motorized XY stage software module also allows us to have a
variable time-lapse: say 10 mins at one time interval and then the next 6
hours at a longer one [which our present 'physiology' module can't do].
Shame we never got it all with the microscope in the first place [and then
it probably would have attracted a large discount].

Good luck with the purchase anyway

Keith
---------------------------------------------------------------------------
Dr Keith J. Morris,
Molecular Cytogenetics and Microscopy Core,
Laboratory 00/069 and 00/070,
The Wellcome Trust Centre for Human Genetics,
Roosevelt Drive,
Oxford  OX3 7BN,
United Kingdom.

Telephone:  +44 (0)1865 287568
Email:  [hidden email]
Web-pages: http://www.well.ox.ac.uk/molecular-cytogenetics-and-microscopy

-----Original Message-----
From: Confocal Microscopy List [mailto:[hidden email]] On
Behalf Of Craig Brideau
Sent: 25 January 2010 19:08
To: [hidden email]
Subject: Re: stage motorization

A motorized stage will not necessarily be more stable than a
non-motorized stage.  It mainly depends on the bearing system.  The
motor just replaces your finger turning a shaft in most cases, so it
all really boils down to the mechanics of how the shaft is geared and
the bearing system the stage is resting on.  That said, a motorized
stage with active correction built in, like 'Perfect Focus' will 'lock
on' to a given position and actively maintain it.  More generally
speaking, if your room is fairly temperature stable, your microscope
is vibration free, and your ventilation system is not turbulent, you
should get decent stability from most good quality stages, either
manual or motorized.  At the end of the day though, it will all
revolve around your specific case; how much movement can you tolerate
within what timeframe?  You will need to verify that the specs of the
stage match your requirements.  Even then, you will probably need to
test it out to be sure.

Craig

On Mon, Jan 25, 2010 at 9:56 AM, Charles Stevens <[hidden email]>
wrote:
>
> Dear List,
>
>    We're planning to set up an inverted confocal microscope for live cell
> imaging. I'd appreciate any opinions on using manual vs x-y motorized
stage.
> Is the motorized stage more stabile during long-term experiments? Does it
> facilitate/is it necessary for any experiments besides multi-point
> time-lapse imaging?
>    Thanks for your comments!
>
>   Charles
>
>

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