Has anyone had problems with the Thorlabs Olympus filter cube? (Part# TLV-U-MF2)

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Benjamin Smith Benjamin Smith
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Has anyone had problems with the Thorlabs Olympus filter cube? (Part# TLV-U-MF2)

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Hey Microscopists,
    I was wondering if I could ask for your help in solving a mystery; I
was wondering if anyone else has had problems fitting the Thorlabs
replacement for the Olympus filter cube (Part #: TLV-U-MF2) on their
Olympus microscopes.

     We ordered these cubes back in November and I was unable to get them
to fit on any of our Olympus microscopes.  The following movie first shows
how the OEM cube seats into the turret, and then shows that the Thorlabs
cube cannot be fastened and is very loose:

https://goo.gl/eOB32u

    In fact, I found the cubes to be so loose that I could even fit a 1mm
allen key between the turret and the cube:

https://goo.gl/WWH4hx

    Upon further investigation, I found that the back of the dovetail on
the cube was 1 mm wider on the Thorlabs cube compared to the OEM cube.  I
was wondering if this was a machining error or a design error, so I
downloaded the CAD files from the Thorlabs site for the OEM cubes and the
Thorlabs replacement, and the CAD files themselves showed the Thorlabs
cubes having a 1mm wider dovetail than the OEM cube, suggesting this was
actually a design error:

https://goo.gl/szKDxm

   Since that time, I've been going back and forth with Thorlabs trying to
explain the design mistake, including talking directly with a product
engineer, but when I got a pair of replacement cubes a few weeks ago, they
had exactly the same problem.  When I tried again to explain the design
problem, Thorlabs responded by telling me it is a tolerance issue rather
than a design issue, even though the CAD design itself does not match the
OEM part.  Also, every cube I've received perfectly matches their CAD file,
suggesting the machining tolerances are very tight.

   Therefore, I was wondering if anyone else has had issues with these
cubes, or if it just happens to be the ones we received.  I'm specifically
referring to the following Thorlabs replacement cube for the the Olympus
OEM cube: https://www.thorlabs.com/thorproduct.cfm?partnumber=TLV-U-MF2

Thank you for your help,
    Ben Smith

--
Benjamin E. Smith, Ph. D.
Microscopy Specialist, Vision Science
University of California, Berkeley
142 Life Sciences Addition
Berkeley, CA  94720-3200
Tel  (510) 642-9712
Fax (510) 643-6791
e-mail: [hidden email]
http://vision.berkeley.edu/
Eric Marino Eric Marino
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Re: Has anyone had problems with the Thorlabs Olympus filter cube? (Part# TLV-U-MF2)

*****
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http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
Post images on http://www.imgur.com and include the link in your posting.
*****

Maybe they are the MVX10 or the BX cubes not the BX2 cubes.

Eric Marino
[hidden email]




> On Feb 21, 2017, at 4:27 PM, Benjamin E Smith <[hidden email]> wrote:
>
> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Hey Microscopists,
>    I was wondering if I could ask for your help in solving a mystery; I
> was wondering if anyone else has had problems fitting the Thorlabs
> replacement for the Olympus filter cube (Part #: TLV-U-MF2) on their
> Olympus microscopes.
>
>     We ordered these cubes back in November and I was unable to get them
> to fit on any of our Olympus microscopes.  The following movie first shows
> how the OEM cube seats into the turret, and then shows that the Thorlabs
> cube cannot be fastened and is very loose:
>
> https://goo.gl/eOB32u
>
>    In fact, I found the cubes to be so loose that I could even fit a 1mm
> allen key between the turret and the cube:
>
> https://goo.gl/WWH4hx
>
>    Upon further investigation, I found that the back of the dovetail on
> the cube was 1 mm wider on the Thorlabs cube compared to the OEM cube.  I
> was wondering if this was a machining error or a design error, so I
> downloaded the CAD files from the Thorlabs site for the OEM cubes and the
> Thorlabs replacement, and the CAD files themselves showed the Thorlabs
> cubes having a 1mm wider dovetail than the OEM cube, suggesting this was
> actually a design error:
>
> https://goo.gl/szKDxm
>
>   Since that time, I've been going back and forth with Thorlabs trying to
> explain the design mistake, including talking directly with a product
> engineer, but when I got a pair of replacement cubes a few weeks ago, they
> had exactly the same problem.  When I tried again to explain the design
> problem, Thorlabs responded by telling me it is a tolerance issue rather
> than a design issue, even though the CAD design itself does not match the
> OEM part.  Also, every cube I've received perfectly matches their CAD file,
> suggesting the machining tolerances are very tight.
>
>   Therefore, I was wondering if anyone else has had issues with these
> cubes, or if it just happens to be the ones we received.  I'm specifically
> referring to the following Thorlabs replacement cube for the the Olympus
> OEM cube: https://www.thorlabs.com/thorproduct.cfm?partnumber=TLV-U-MF2
>
> Thank you for your help,
>    Ben Smith
>
> --
> Benjamin E. Smith, Ph. D.
> Microscopy Specialist, Vision Science
> University of California, Berkeley
> 142 Life Sciences Addition
> Berkeley, CA  94720-3200
> Tel  (510) 642-9712
> Fax (510) 643-6791
> e-mail: [hidden email]
> http://vision.berkeley.edu/
Michael Giacomelli Michael Giacomelli
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Re: Has anyone had problems with the Thorlabs Olympus filter cube? (Part# TLV-U-MF2)

In reply to this post by Benjamin Smith
*****
To join, leave or search the confocal microscopy listserv, go to:
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
Post images on http://www.imgur.com and include the link in your posting.
*****

What microscope are you trying to use it in?

Mike

On Tue, Feb 21, 2017 at 4:27 PM, Benjamin E Smith
<[hidden email]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Hey Microscopists,
>     I was wondering if I could ask for your help in solving a mystery; I
> was wondering if anyone else has had problems fitting the Thorlabs
> replacement for the Olympus filter cube (Part #: TLV-U-MF2) on their
> Olympus microscopes.
>
>      We ordered these cubes back in November and I was unable to get them
> to fit on any of our Olympus microscopes.  The following movie first shows
> how the OEM cube seats into the turret, and then shows that the Thorlabs
> cube cannot be fastened and is very loose:
>
> https://goo.gl/eOB32u
>
>     In fact, I found the cubes to be so loose that I could even fit a 1mm
> allen key between the turret and the cube:
>
> https://goo.gl/WWH4hx
>
>     Upon further investigation, I found that the back of the dovetail on
> the cube was 1 mm wider on the Thorlabs cube compared to the OEM cube.  I
> was wondering if this was a machining error or a design error, so I
> downloaded the CAD files from the Thorlabs site for the OEM cubes and the
> Thorlabs replacement, and the CAD files themselves showed the Thorlabs
> cubes having a 1mm wider dovetail than the OEM cube, suggesting this was
> actually a design error:
>
> https://goo.gl/szKDxm
>
>    Since that time, I've been going back and forth with Thorlabs trying to
> explain the design mistake, including talking directly with a product
> engineer, but when I got a pair of replacement cubes a few weeks ago, they
> had exactly the same problem.  When I tried again to explain the design
> problem, Thorlabs responded by telling me it is a tolerance issue rather
> than a design issue, even though the CAD design itself does not match the
> OEM part.  Also, every cube I've received perfectly matches their CAD file,
> suggesting the machining tolerances are very tight.
>
>    Therefore, I was wondering if anyone else has had issues with these
> cubes, or if it just happens to be the ones we received.  I'm specifically
> referring to the following Thorlabs replacement cube for the the Olympus
> OEM cube: https://www.thorlabs.com/thorproduct.cfm?partnumber=TLV-U-MF2
>
> Thank you for your help,
>     Ben Smith
>
> --
> Benjamin E. Smith, Ph. D.
> Microscopy Specialist, Vision Science
> University of California, Berkeley
> 142 Life Sciences Addition
> Berkeley, CA  94720-3200
> Tel  (510) 642-9712
> Fax (510) 643-6791
> e-mail: [hidden email]
> http://vision.berkeley.edu/
Benjamin Smith Benjamin Smith
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Re: Has anyone had problems with the Thorlabs Olympus filter cube? (Part# TLV-U-MF2)

In reply to this post by Eric Marino
*****
To join, leave or search the confocal microscopy listserv, go to:
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
Post images on http://www.imgur.com and include the link in your posting.
*****

I can't find a distinguishing reference between BX and BX-2, as I've seen
both the BX-41 and BX-51 referred to as both BX and BX-2.  This ambiguity
seems to stem from the BX series coming after the BH series, and since BH
was BH-2, it would make sense to call BX BX-2, although someone from
Olympus could correct me.  Also, the only dovetail filter cube I could find
from Olympus was the U-MF2, as the preceding cubes didn't use a dovetail,
and nor does the BX3 to allow for "tool free" changing of the filter cube.
Therefore, as far as I can tell, the U-MF2 is the only dovetail cube that
Olympus made.  That said, Thorlabs states that the cube was designed
for AX, BX2, and IX2 Series, meaning that it should fit on the BX-RFA and
BX-URA2 arms.  We have both of these, and the cubes do not fit on either of
them, and the U-MF2 cubes fit on both.

-Ben Smith

On Tue, Feb 21, 2017 at 1:50 PM, Eric Marino <[hidden email]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Maybe they are the MVX10 or the BX cubes not the BX2 cubes.
>
> Eric Marino
> [hidden email]
>
>
>
>
> > On Feb 21, 2017, at 4:27 PM, Benjamin E Smith <
> [hidden email]> wrote:
> >
> > *****
> > To join, leave or search the confocal microscopy listserv, go to:
> > http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> > Post images on http://www.imgur.com and include the link in your
> posting.
> > *****
> >
> > Hey Microscopists,
> >    I was wondering if I could ask for your help in solving a mystery; I
> > was wondering if anyone else has had problems fitting the Thorlabs
> > replacement for the Olympus filter cube (Part #: TLV-U-MF2) on their
> > Olympus microscopes.
> >
> >     We ordered these cubes back in November and I was unable to get them
> > to fit on any of our Olympus microscopes.  The following movie first
> shows
> > how the OEM cube seats into the turret, and then shows that the Thorlabs
> > cube cannot be fastened and is very loose:
> >
> > https://goo.gl/eOB32u
> >
> >    In fact, I found the cubes to be so loose that I could even fit a 1mm
> > allen key between the turret and the cube:
> >
> > https://goo.gl/WWH4hx
> >
> >    Upon further investigation, I found that the back of the dovetail on
> > the cube was 1 mm wider on the Thorlabs cube compared to the OEM cube.  I
> > was wondering if this was a machining error or a design error, so I
> > downloaded the CAD files from the Thorlabs site for the OEM cubes and the
> > Thorlabs replacement, and the CAD files themselves showed the Thorlabs
> > cubes having a 1mm wider dovetail than the OEM cube, suggesting this was
> > actually a design error:
> >
> > https://goo.gl/szKDxm
> >
> >   Since that time, I've been going back and forth with Thorlabs trying to
> > explain the design mistake, including talking directly with a product
> > engineer, but when I got a pair of replacement cubes a few weeks ago,
> they
> > had exactly the same problem.  When I tried again to explain the design
> > problem, Thorlabs responded by telling me it is a tolerance issue rather
> > than a design issue, even though the CAD design itself does not match the
> > OEM part.  Also, every cube I've received perfectly matches their CAD
> file,
> > suggesting the machining tolerances are very tight.
> >
> >   Therefore, I was wondering if anyone else has had issues with these
> > cubes, or if it just happens to be the ones we received.  I'm
> specifically
> > referring to the following Thorlabs replacement cube for the the Olympus
> > OEM cube: https://www.thorlabs.com/thorproduct.cfm?partnumber=TLV-U-MF2
> >
> > Thank you for your help,
> >    Ben Smith
> >
> > --
> > Benjamin E. Smith, Ph. D.
> > Microscopy Specialist, Vision Science
> > University of California, Berkeley
> > 142 Life Sciences Addition
> > Berkeley, CA  94720-3200
> > Tel  (510) 642-9712
> > Fax (510) 643-6791
> > e-mail: [hidden email]
> > http://vision.berkeley.edu/
>



--
Benjamin E. Smith, Ph. D.
Microscopy Specialist, Vision Science
University of California, Berkeley
142 Life Sciences Addition
Berkeley, CA  94720-3200
Tel  (510) 642-9712
Fax (510) 643-6791
e-mail: [hidden email]
http://vision.berkeley.edu/
Benjamin Smith Benjamin Smith
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Re: Has anyone had problems with the Thorlabs Olympus filter cube? (Part# TLV-U-MF2)

In reply to this post by Michael Giacomelli
*****
To join, leave or search the confocal microscopy listserv, go to:
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
Post images on http://www.imgur.com and include the link in your posting.
*****

The systems are the BX-RFA and BX-URA2 epifluorescence arms, which are part
of the BX51/BX61 microscopes.

-Ben Smith

On Tue, Feb 21, 2017 at 2:16 PM, Michael Giacomelli <[hidden email]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> What microscope are you trying to use it in?
>
> Mike
>
> On Tue, Feb 21, 2017 at 4:27 PM, Benjamin E Smith
> <[hidden email]> wrote:
> > *****
> > To join, leave or search the confocal microscopy listserv, go to:
> > http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> > Post images on http://www.imgur.com and include the link in your
> posting.
> > *****
> >
> > Hey Microscopists,
> >     I was wondering if I could ask for your help in solving a mystery; I
> > was wondering if anyone else has had problems fitting the Thorlabs
> > replacement for the Olympus filter cube (Part #: TLV-U-MF2) on their
> > Olympus microscopes.
> >
> >      We ordered these cubes back in November and I was unable to get them
> > to fit on any of our Olympus microscopes.  The following movie first
> shows
> > how the OEM cube seats into the turret, and then shows that the Thorlabs
> > cube cannot be fastened and is very loose:
> >
> > https://goo.gl/eOB32u
> >
> >     In fact, I found the cubes to be so loose that I could even fit a 1mm
> > allen key between the turret and the cube:
> >
> > https://goo.gl/WWH4hx
> >
> >     Upon further investigation, I found that the back of the dovetail on
> > the cube was 1 mm wider on the Thorlabs cube compared to the OEM cube.  I
> > was wondering if this was a machining error or a design error, so I
> > downloaded the CAD files from the Thorlabs site for the OEM cubes and the
> > Thorlabs replacement, and the CAD files themselves showed the Thorlabs
> > cubes having a 1mm wider dovetail than the OEM cube, suggesting this was
> > actually a design error:
> >
> > https://goo.gl/szKDxm
> >
> >    Since that time, I've been going back and forth with Thorlabs trying
> to
> > explain the design mistake, including talking directly with a product
> > engineer, but when I got a pair of replacement cubes a few weeks ago,
> they
> > had exactly the same problem.  When I tried again to explain the design
> > problem, Thorlabs responded by telling me it is a tolerance issue rather
> > than a design issue, even though the CAD design itself does not match the
> > OEM part.  Also, every cube I've received perfectly matches their CAD
> file,
> > suggesting the machining tolerances are very tight.
> >
> >    Therefore, I was wondering if anyone else has had issues with these
> > cubes, or if it just happens to be the ones we received.  I'm
> specifically
> > referring to the following Thorlabs replacement cube for the the Olympus
> > OEM cube: https://www.thorlabs.com/thorproduct.cfm?partnumber=TLV-U-MF2
> >
> > Thank you for your help,
> >     Ben Smith
> >
> > --
> > Benjamin E. Smith, Ph. D.
> > Microscopy Specialist, Vision Science
> > University of California, Berkeley
> > 142 Life Sciences Addition
> > Berkeley, CA  94720-3200
> > Tel  (510) 642-9712
> > Fax (510) 643-6791
> > e-mail: [hidden email]
> > http://vision.berkeley.edu/
>



--
Benjamin E. Smith, Ph. D.
Microscopy Specialist, Vision Science
University of California, Berkeley
142 Life Sciences Addition
Berkeley, CA  94720-3200
Tel  (510) 642-9712
Fax (510) 643-6791
e-mail: [hidden email]
http://vision.berkeley.edu/
Dr. K N Ganesh Dr. K N Ganesh
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Re: Has anyone had problems with the Thorlabs Olympus filter cube? (Part# TLV-U-MF2)

*****
To join, leave or search the confocal microscopy listserv, go to:
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
Post images on http://www.imgur.com and include the link in your posting.
*****

U-MF2 is for BX2 or IX2 series of scopes where as U-FF is for BX3 and IX3 series.  Which scope you are using.  
Reg
Ganesh

Sent from my iPhone

> On 25-Feb-2017, at 4:01 AM, Benjamin E Smith <[hidden email]> wrote:
>
> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> The systems are the BX-RFA and BX-URA2 epifluorescence arms, which are part
> of the BX51/BX61 microscopes.
>
> -Ben Smith
>
>> On Tue, Feb 21, 2017 at 2:16 PM, Michael Giacomelli <[hidden email]> wrote:
>>
>> *****
>> To join, leave or search the confocal microscopy listserv, go to:
>> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
>> Post images on http://www.imgur.com and include the link in your posting.
>> *****
>>
>> What microscope are you trying to use it in?
>>
>> Mike
>>
>> On Tue, Feb 21, 2017 at 4:27 PM, Benjamin E Smith
>> <[hidden email]> wrote:
>>> *****
>>> To join, leave or search the confocal microscopy listserv, go to:
>>> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
>>> Post images on http://www.imgur.com and include the link in your
>> posting.
>>> *****
>>>
>>> Hey Microscopists,
>>>    I was wondering if I could ask for your help in solving a mystery; I
>>> was wondering if anyone else has had problems fitting the Thorlabs
>>> replacement for the Olympus filter cube (Part #: TLV-U-MF2) on their
>>> Olympus microscopes.
>>>
>>>     We ordered these cubes back in November and I was unable to get them
>>> to fit on any of our Olympus microscopes.  The following movie first
>> shows
>>> how the OEM cube seats into the turret, and then shows that the Thorlabs
>>> cube cannot be fastened and is very loose:
>>>
>>> https://goo.gl/eOB32u
>>>
>>>    In fact, I found the cubes to be so loose that I could even fit a 1mm
>>> allen key between the turret and the cube:
>>>
>>> https://goo.gl/WWH4hx
>>>
>>>    Upon further investigation, I found that the back of the dovetail on
>>> the cube was 1 mm wider on the Thorlabs cube compared to the OEM cube.  I
>>> was wondering if this was a machining error or a design error, so I
>>> downloaded the CAD files from the Thorlabs site for the OEM cubes and the
>>> Thorlabs replacement, and the CAD files themselves showed the Thorlabs
>>> cubes having a 1mm wider dovetail than the OEM cube, suggesting this was
>>> actually a design error:
>>>
>>> https://goo.gl/szKDxm
>>>
>>>   Since that time, I've been going back and forth with Thorlabs trying
>> to
>>> explain the design mistake, including talking directly with a product
>>> engineer, but when I got a pair of replacement cubes a few weeks ago,
>> they
>>> had exactly the same problem.  When I tried again to explain the design
>>> problem, Thorlabs responded by telling me it is a tolerance issue rather
>>> than a design issue, even though the CAD design itself does not match the
>>> OEM part.  Also, every cube I've received perfectly matches their CAD
>> file,
>>> suggesting the machining tolerances are very tight.
>>>
>>>   Therefore, I was wondering if anyone else has had issues with these
>>> cubes, or if it just happens to be the ones we received.  I'm
>> specifically
>>> referring to the following Thorlabs replacement cube for the the Olympus
>>> OEM cube: https://www.thorlabs.com/thorproduct.cfm?partnumber=TLV-U-MF2
>>>
>>> Thank you for your help,
>>>    Ben Smith
>>>
>>> --
>>> Benjamin E. Smith, Ph. D.
>>> Microscopy Specialist, Vision Science
>>> University of California, Berkeley
>>> 142 Life Sciences Addition
>>> Berkeley, CA  94720-3200
>>> Tel  (510) 642-9712
>>> Fax (510) 643-6791
>>> e-mail: [hidden email]
>>> http://vision.berkeley.edu/
>>
>
>
>
> --
> Benjamin E. Smith, Ph. D.
> Microscopy Specialist, Vision Science
> University of California, Berkeley
> 142 Life Sciences Addition
> Berkeley, CA  94720-3200
> Tel  (510) 642-9712
> Fax (510) 643-6791
> e-mail: [hidden email]
> http://vision.berkeley.edu/
Benjamin Smith Benjamin Smith
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Re: Has anyone had problems with the Thorlabs Olympus filter cube? (Part# TLV-U-MF2)

*****
To join, leave or search the confocal microscopy listserv, go to:
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
Post images on http://www.imgur.com and include the link in your posting.
*****

The BX2 series.  Specifically the BX-RFA and BX-URA2 arms.

Sent from my iPhone

On Feb 24, 2017, at 11:32 PM, Ganesh Kadasoor <[hidden email]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> U-MF2 is for BX2 or IX2 series of scopes where as U-FF is for BX3 and IX3 series.  Which scope you are using.  
> Reg
> Ganesh
>
> Sent from my iPhone
>
>> On 25-Feb-2017, at 4:01 AM, Benjamin E Smith <[hidden email]> wrote:
>>
>> *****
>> To join, leave or search the confocal microscopy listserv, go to:
>> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
>> Post images on http://www.imgur.com and include the link in your posting.
>> *****
>>
>> The systems are the BX-RFA and BX-URA2 epifluorescence arms, which are part
>> of the BX51/BX61 microscopes.
>>
>> -Ben Smith
>>
>>> On Tue, Feb 21, 2017 at 2:16 PM, Michael Giacomelli <[hidden email]> wrote:
>>>
>>> *****
>>> To join, leave or search the confocal microscopy listserv, go to:
>>> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
>>> Post images on http://www.imgur.com and include the link in your posting.
>>> *****
>>>
>>> What microscope are you trying to use it in?
>>>
>>> Mike
>>>
>>> On Tue, Feb 21, 2017 at 4:27 PM, Benjamin E Smith
>>> <[hidden email]> wrote:
>>>> *****
>>>> To join, leave or search the confocal microscopy listserv, go to:
>>>> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
>>>> Post images on http://www.imgur.com and include the link in your
>>> posting.
>>>> *****
>>>>
>>>> Hey Microscopists,
>>>>   I was wondering if I could ask for your help in solving a mystery; I
>>>> was wondering if anyone else has had problems fitting the Thorlabs
>>>> replacement for the Olympus filter cube (Part #: TLV-U-MF2) on their
>>>> Olympus microscopes.
>>>>
>>>>    We ordered these cubes back in November and I was unable to get them
>>>> to fit on any of our Olympus microscopes.  The following movie first
>>> shows
>>>> how the OEM cube seats into the turret, and then shows that the Thorlabs
>>>> cube cannot be fastened and is very loose:
>>>>
>>>> https://goo.gl/eOB32u
>>>>
>>>>   In fact, I found the cubes to be so loose that I could even fit a 1mm
>>>> allen key between the turret and the cube:
>>>>
>>>> https://goo.gl/WWH4hx
>>>>
>>>>   Upon further investigation, I found that the back of the dovetail on
>>>> the cube was 1 mm wider on the Thorlabs cube compared to the OEM cube.  I
>>>> was wondering if this was a machining error or a design error, so I
>>>> downloaded the CAD files from the Thorlabs site for the OEM cubes and the
>>>> Thorlabs replacement, and the CAD files themselves showed the Thorlabs
>>>> cubes having a 1mm wider dovetail than the OEM cube, suggesting this was
>>>> actually a design error:
>>>>
>>>> https://goo.gl/szKDxm
>>>>
>>>>  Since that time, I've been going back and forth with Thorlabs trying
>>> to
>>>> explain the design mistake, including talking directly with a product
>>>> engineer, but when I got a pair of replacement cubes a few weeks ago,
>>> they
>>>> had exactly the same problem.  When I tried again to explain the design
>>>> problem, Thorlabs responded by telling me it is a tolerance issue rather
>>>> than a design issue, even though the CAD design itself does not match the
>>>> OEM part.  Also, every cube I've received perfectly matches their CAD
>>> file,
>>>> suggesting the machining tolerances are very tight.
>>>>
>>>>  Therefore, I was wondering if anyone else has had issues with these
>>>> cubes, or if it just happens to be the ones we received.  I'm
>>> specifically
>>>> referring to the following Thorlabs replacement cube for the the Olympus
>>>> OEM cube: https://www.thorlabs.com/thorproduct.cfm?partnumber=TLV-U-MF2
>>>>
>>>> Thank you for your help,
>>>>   Ben Smith
>>>>
>>>> --
>>>> Benjamin E. Smith, Ph. D.
>>>> Microscopy Specialist, Vision Science
>>>> University of California, Berkeley
>>>> 142 Life Sciences Addition
>>>> Berkeley, CA  94720-3200
>>>> Tel  (510) 642-9712
>>>> Fax (510) 643-6791
>>>> e-mail: [hidden email]
>>>> http://vision.berkeley.edu/
>>
>>
>>
>> --
>> Benjamin E. Smith, Ph. D.
>> Microscopy Specialist, Vision Science
>> University of California, Berkeley
>> 142 Life Sciences Addition
>> Berkeley, CA  94720-3200
>> Tel  (510) 642-9712
>> Fax (510) 643-6791
>> e-mail: [hidden email]
>> http://vision.berkeley.edu/