Stuck objectives
Locked
|
*****
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. ***** Hi list. I have got a couple of Leica objectives with spring stuck at low position. Any hints how to pull them back? Thanks. Petro. |
|
|
*****
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. ***** Petro, I think this might be a feature of Leica objectives. I think for transport, your supposed to put them in the lower position. Try pushing down and rotating clockwise to make them come up. If that doesn't work, then you've probably got oil or something else in there that might require them to serviced. John Oreopoulos On 2019-02-02, at 4:27 PM, Piter_ 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. > ***** > > Hi list. > I have got a couple of Leica objectives with spring stuck at low position. > Any hints how to pull them back? > Thanks. > Petro. |
|
|
*****
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. ***** Sorry, should have said counter-clockwise there to release. John On 2019-02-02, at 6:23 PM, John Oreopoulos 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. > ***** > > Petro, > > I think this might be a feature of Leica objectives. I think for transport, your supposed to put them in the lower position. Try pushing down and rotating clockwise to make them come up. If that doesn't work, then you've probably got oil or something else in there that might require them to serviced. > > John Oreopoulos > > On 2019-02-02, at 4:27 PM, Piter_ 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. >> ***** >> >> Hi list. >> I have got a couple of Leica objectives with spring stuck at low position. >> Any hints how to pull them back? >> Thanks. >> Petro. |
|
|
*****
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. ***** Hi John. Thanks a lot for reply. I am aware of this "transportation position". The problem is that it doesn't come up no matter how I rotate an pull it. Do you have any experience with servicing such objectives. I got them with a used Leica mic and they re all covered with some lubricant... I think that what caused problems in the first place. Thank you. Petro. On Sun, Feb 3, 2019, 00:24 John Oreopoulos <[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. > ***** > > Sorry, should have said counter-clockwise there to release. > > John > > On 2019-02-02, at 6:23 PM, John Oreopoulos 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. > > ***** > > > > Petro, > > > > I think this might be a feature of Leica objectives. I think for > transport, your supposed to put them in the lower position. Try pushing > down and rotating clockwise to make them come up. If that doesn't work, > then you've probably got oil or something else in there that might require > them to serviced. > > > > John Oreopoulos > > > > On 2019-02-02, at 4:27 PM, Piter_ 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. > >> ***** > >> > >> Hi list. > >> I have got a couple of Leica objectives with spring stuck at low > position. > >> Any hints how to pull them back? > >> Thanks. > >> Petro. > |
|
|
*****
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. ***** Dear Petro, your e-mail does not tell which part of the world you are in, but if possible and with all the problems you have I would suggest to have the whole microscope serviced. Also to see whether other problems are around. Towards your question, we had a loose front lens on a 63x oil 1.4, and the repair was, I believe, around 3000 Euro with taxes. It was some time ago, so I am not really sure. But if a technician is around, he can probably give you a rough estimate. Or possibly fix it on the spot. Or give your local Leica representative a call, I would assume that this is a repair that occurs quite often. Best Steffen Am 03.02.2019 um 12:59 schrieb Piter_: > ***** > 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. > ***** > > Hi John. > Thanks a lot for reply. I am aware of this "transportation position". The > problem is that it doesn't come up no matter how I rotate an pull it. Do > you have any experience with servicing such objectives. I got them with a > used Leica mic and they re all covered with some lubricant... I think that > what caused problems in the first place. > Thank you. > Petro. > > On Sun, Feb 3, 2019, 00:24 John Oreopoulos <[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. >> ***** >> >> Sorry, should have said counter-clockwise there to release. >> >> John >> >> On 2019-02-02, at 6:23 PM, John Oreopoulos 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. >>> ***** >>> >>> Petro, >>> >>> I think this might be a feature of Leica objectives. I think for >> transport, your supposed to put them in the lower position. Try pushing >> down and rotating clockwise to make them come up. If that doesn't work, >> then you've probably got oil or something else in there that might require >> them to serviced. >>> John Oreopoulos >>> >>> On 2019-02-02, at 4:27 PM, Piter_ 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. >>>> ***** >>>> >>>> Hi list. >>>> I have got a couple of Leica objectives with spring stuck at low >> position. >>>> Any hints how to pull them back? >>>> Thanks. >>>> Petro. -- ------------------------------------------------------------ Steffen Dietzel, PD Dr. rer. nat Ludwig-Maximilians-Universität München Biomedical Center (BMC) Head of the Core Facility Bioimaging Großhaderner Straße 9 D-82152 Planegg-Martinsried Germany http://www.bioimaging.bmc.med.uni-muenchen.de |
|
|
In reply to this post by Piter_
*****
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. ***** Petro In a former life I was a tech serviceman specializing in Zeiss. Optical greases are made to have a specific draw to impose a specific resistance for various applications. We had about 6 different greases that covered most applications. Brass to brass dovetails, steel roller bearings in focus systems, gliding stages, spring clutches, retracting objectives etc. It is very important especially for objectives that the grease has the right draw to dampen the movement thus protecting the limiting mechanism as well as the lenses in the inner tube from being slammed. It is also important that are no evaporates from the grease that could craw or deposit on the lens surface. I have seen this happen when a brave someone uses the wrong type of grease. Also if the lens is on an inverted scope, sometimes media can run down the lens and get into the grease between the inner surface of the outer barrel and the outer surface of the lens tube. If it corrodes the brass it can really lock up the objective. I know the newer Leica objectives are made with a shield that forces any spillage to run down the outside of the objective but if your objective is the older type you could have a mess! Keep in mind that the mating surfaces in retracting objectives is a very precise fit and corrosion, if it occurs, can ruin these sliding surfaces. If you were in the U.S. I would ask you to send it to me for evaluation or repair but I don’t know where you are! Dan > On Feb 3, 2019, at 6:59 AM, Piter_ <[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. > ***** > > Hi John. > Thanks a lot for reply. I am aware of this "transportation position". The > problem is that it doesn't come up no matter how I rotate an pull it. Do > you have any experience with servicing such objectives. I got them with a > used Leica mic and they re all covered with some lubricant... I think that > what caused problems in the first place. > Thank you. > Petro. > > On Sun, Feb 3, 2019, 00:24 John Oreopoulos <[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. >> ***** >> >> Sorry, should have said counter-clockwise there to release. >> >> John >> >> On 2019-02-02, at 6:23 PM, John Oreopoulos 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. >>> ***** >>> >>> Petro, >>> >>> I think this might be a feature of Leica objectives. I think for >> transport, your supposed to put them in the lower position. Try pushing >> down and rotating clockwise to make them come up. If that doesn't work, >> then you've probably got oil or something else in there that might require >> them to serviced. >>> >>> John Oreopoulos >>> >>> On 2019-02-02, at 4:27 PM, Piter_ 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. >>>> ***** >>>> >>>> Hi list. >>>> I have got a couple of Leica objectives with spring stuck at low >> position. >>>> Any hints how to pull them back? >>>> Thanks. >>>> Petro. >> |
|
|
*****
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. ***** Along the same topic, some lubricants contain volatile components that may deposit on surrounding surfaces. Nye Lubricants have a range of products, including low volatility grease for sliding surfaces. No personal interest, recommended to me by local optical service engineer. https://www.nyelubricants.com <https://www.nyelubricants.com/> glen > On Feb 4, 2019, at 7:00 AM, Dan Focht <[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. > ***** > > Petro > > In a former life I was a tech serviceman specializing in Zeiss. > Optical greases are made to have a specific draw to impose a specific resistance for various applications. > We had about 6 different greases that covered most applications. > Brass to brass dovetails, steel roller bearings in focus systems, gliding stages, spring clutches, retracting objectives etc. > It is very important especially for objectives that the grease has the right draw to dampen the movement thus protecting the limiting mechanism as well as the lenses in the inner tube from being slammed. It is also important that are no evaporates from the grease that could craw or deposit on the lens surface. I have seen this happen when a brave someone uses the wrong type of grease. > Also if the lens is on an inverted scope, sometimes media can run down the lens and get into the grease between the inner surface of the outer barrel and the outer surface of the lens tube. If it corrodes the brass it can really lock up the objective. I know the newer Leica objectives are made with a shield that forces any spillage to run down the outside of the objective but if your objective is the older type you could have a mess! Keep in mind that the mating surfaces in retracting objectives is a very precise fit and corrosion, if it occurs, can ruin these sliding surfaces. If you were in the U.S. I would ask you to send it to me for evaluation or repair but I don’t know where you are! > > Dan > > > > > >> On Feb 3, 2019, at 6:59 AM, Piter_ <[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. >> ***** >> >> Hi John. >> Thanks a lot for reply. I am aware of this "transportation position". The >> problem is that it doesn't come up no matter how I rotate an pull it. Do >> you have any experience with servicing such objectives. I got them with a >> used Leica mic and they re all covered with some lubricant... I think that >> what caused problems in the first place. >> Thank you. >> Petro. >> >> On Sun, Feb 3, 2019, 00:24 John Oreopoulos <[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. >>> ***** >>> >>> Sorry, should have said counter-clockwise there to release. >>> >>> John >>> >>> On 2019-02-02, at 6:23 PM, John Oreopoulos 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. >>>> ***** >>>> >>>> Petro, >>>> >>>> I think this might be a feature of Leica objectives. I think for >>> transport, your supposed to put them in the lower position. Try pushing >>> down and rotating clockwise to make them come up. If that doesn't work, >>> then you've probably got oil or something else in there that might require >>> them to serviced. >>>> >>>> John Oreopoulos >>>> >>>> On 2019-02-02, at 4:27 PM, Piter_ 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. >>>>> ***** >>>>> >>>>> Hi list. >>>>> I have got a couple of Leica objectives with spring stuck at low >>> position. >>>>> Any hints how to pull them back? >>>>> Thanks. >>>>> Petro. >>> |
|
|
*****
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. ***** Petro, Well, I have had a service engineer not be happy with lithium grease, but then he used ethanol/ether to clean the objectives ... If you can get the lubes recommended by Dan Focht, or Glen MacDonald I'd use those. When I do use lithium grease, it's just the minimum! needed and work it into the surfaces to be lubed. And keep it away from optical surfaces. Phil ------------- Philip Oshel Imaging Facility Director Biology Department 1304 Biosciences 1455 Calumet Ct. Central Michigan University Mt. Pleasant, MI 48859 989 774-3576 office 989 774-7567 lab -----Original Message----- From: Confocal Microscopy List <[hidden email]> on behalf of Glen MacDonald <[hidden email]> Reply-To: Confocal Microscopy List <[hidden email]> Date: Monday, 04February, 2019 at 13:42 To: "[hidden email]" <[hidden email]> Subject: Re: Stuck objectives ***** 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. ***** Along the same topic, some lubricants contain volatile components that may deposit on surrounding surfaces. Nye Lubricants have a range of products, including low volatility grease for sliding surfaces. No personal interest, recommended to me by local optical service engineer. https://www.nyelubricants.com <https://www.nyelubricants.com/> glen > On Feb 4, 2019, at 7:00 AM, Dan Focht <[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. > ***** > > Petro > > In a former life I was a tech serviceman specializing in Zeiss. > Optical greases are made to have a specific draw to impose a specific resistance for various applications. > We had about 6 different greases that covered most applications. > Brass to brass dovetails, steel roller bearings in focus systems, gliding stages, spring clutches, retracting objectives etc. > It is very important especially for objectives that the grease has the right draw to dampen the movement thus protecting the limiting mechanism as well as the lenses in the inner tube from being slammed. It is also important that are no evaporates from the grease that could craw or deposit on the lens surface. I have seen this happen when a brave someone uses the wrong type of grease. > Also if the lens is on an inverted scope, sometimes media can run down the lens and get into the grease between the inner surface of the outer barrel and the outer surface of the lens tube. If it corrodes the brass it can really lock up the objective. I know the newer Leica objectives are made with a shield that forces any spillage to run down the outside of the objective but if your objective is the older type you could have a mess! Keep in mind that the mating surfaces in retracting objectives is a very precise fit and corrosion, if it occurs, can ruin these sliding surfaces. If you were in the U.S. I would ask you to send it to me for evaluation or repair but I don’t know where you are! > > Dan > > > > > >> On Feb 3, 2019, at 6:59 AM, Piter_ <[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. >> ***** >> >> Hi John. >> Thanks a lot for reply. I am aware of this "transportation position". The >> problem is that it doesn't come up no matter how I rotate an pull it. Do >> you have any experience with servicing such objectives. I got them with a >> used Leica mic and they re all covered with some lubricant... I think that >> what caused problems in the first place. >> Thank you. >> Petro. >> >> On Sun, Feb 3, 2019, 00:24 John Oreopoulos <[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. >>> ***** >>> >>> Sorry, should have said counter-clockwise there to release. >>> >>> John >>> >>> On 2019-02-02, at 6:23 PM, John Oreopoulos 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. >>>> ***** >>>> >>>> Petro, >>>> >>>> I think this might be a feature of Leica objectives. I think for >>> transport, your supposed to put them in the lower position. Try pushing >>> down and rotating clockwise to make them come up. If that doesn't work, >>> then you've probably got oil or something else in there that might require >>> them to serviced. >>>> >>>> John Oreopoulos >>>> >>>> On 2019-02-02, at 4:27 PM, Piter_ 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. >>>>> ***** >>>>> >>>>> Hi list. >>>>> I have got a couple of Leica objectives with spring stuck at low >>> position. >>>>> Any hints how to pull them back? >>>>> Thanks. >>>>> Petro. >>> |
«
Return to Confocal Microscopy List
|
1 view|%1 views
| Free forum by Nabble | Edit this page |