[OpenSPIM] OpenSPIM Digest, Vol 21, Issue 2

[Michael Redd]

Thanks for the details Hartmann

mike



On 1/12/15 11:00 AM, "openspim-request at openspim.org"
<openspim-request at openspim.org> wrote:

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>Today's Topics:
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>   1. Re: twister motor belt slipping (Hartmann Harz)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Mon, 12 Jan 2015 15:25:37 +0100
>From: Hartmann Harz <harz at biz.uni-muenchen.de>
>To: Michael Redd <mredd at cores.utah.edu>
>Cc: "openspim at openspim.org" <openspim at openspim.org>
>Subject: Re: [OpenSPIM] twister motor belt slipping
>Message-ID: <54B3D961.4070303 at biz.uni-muenchen.de>
>Content-Type: text/plain; charset="windows-1252"; Format="flowed"
>
>Hi Michael,
>sorry for my delayed answer, your e-mail was filtered out.
>
>However, I asked the head of our workshop and he toled me that he
>mounted a 6001 bearing (the number means outer diameter 28 mm, inner
>diameter 12 mm hight 8 mm) into our setup. This bearing has no sealing
>and no grease and is made of brass (balls, cage). He told me that such
>bearings are available as a standard for example from SKF oder FAG. For
>the exact number you should ask your local dealer because there are
>hundreds of different bearings available.
>
>The belt was customized from bulk stock. They cutted of a piece of
>appropriate length and glued the cutted edges together with sperglue. I
>was surprised to see this, but it works fine.
>
>Best
>
>Hartmann
>
>
>
>
>On 20.11.2014 18:02, Michael Redd wrote:
>> Thank you for the informative reply. I would be much obliged if you
>> would provide me the part information on the replacement bearings and
>> belt.
>>
>> From: Hartmann Harz <harz at biz.uni-muenchen.de
>> <mailto:harz at biz.uni-muenchen.de>>
>> Date: Wednesday, November 19, 2014 2:20 PM
>> To: Michael Redd <mredd at cores.utah.edu <mailto:mredd at cores.utah.edu>>,
>> "openspim at openspim.org <mailto:openspim at openspim.org>"
>> <openspim at openspim.org <mailto:openspim at openspim.org>>
>> Cc: "edgar.escobar.nieto at ipt.fraunhofer.de
>> <mailto:edgar.escobar.nieto at ipt.fraunhofer.de>"
>> <edgar.escobar.nieto at ipt.fraunhofer.de
>> <mailto:edgar.escobar.nieto at ipt.fraunhofer.de>>
>> Subject: Re: [OpenSPIM] twister motor belt slipping
>>
>> Dear Michael,
>> in the bginning I also had the problem of belt slipping. At least I
>> was believing that the belt slips. Later I learned that the belt
>> tesion was to high and the bearing was hard-steering. This results
>> during the operation of the twister stepping motor in a loss of steps.
>> Loss of steps or slipping has the same effect, the twister does not
>> turn to the expected angle. We solved this issue by exchanging the
>> bearing with a smooth running one and by a LONGER belt producing lower
>> tension and thereby lower friction in the bearings of the motor and
>> the sample holder.
>>
>> I don't know if this helps to solve your problem but eventually this
>> could help others. At least here in Munich it worked.
>>
>> Best regards
>>
>> Hartmann
>>
>> -- 
>> Dr. H. Harz
>> Ludwig-Maximilians-Universit?t M?nchen
>> Biozentrum
>> AG Prof. Leonhardt
>> Raum B02.059
>> Gro?haderner Stra?e 2
>> 82152 Martinsried
>> Germany
>> Phone: +49(89)2180-74 259
>> Fax: +49(89)218099-74 236
>> Mail:harz at biz.uni-muenchen.de
>>
>>
>> On 19.11.2014 18:42, Michael Redd wrote:
>>> I am struggling with the twister motor belt slipping that others have
>>> mentioned.  I have seen the toothed belt used by Edgar's group in
>>> Aachen and would be much obliged if he described this in more detail
>>> so I could copy it.
>>> -- 
>>> Michael Redd
>>> Imaging Specialist
>>> Microscopy Core Facility
>>> University of Utah
>>> Radiobiology Bldg,Room 55
>>> Salt Lake City, Utah
>>>
>>>
>>> _______________________________________________
>>> OpenSPIM mailing list
>>> OpenSPIM at openspim.orghttp://openspim.org/mailman/listinfo/openspim
>>
>> -- 
>> Dr. H. Harz
>> Ludwig-Maximilians-Universit?t M?nchen
>> Biozentrum
>> AG Prof. Leonhardt
>> Raum B02.059
>> Gro?haderner Stra?e 2
>> 82152 Martinsried
>> Germany
>> Phone: +49(89)2180-74 259
>> Fax: +49(89)218099-74 236
>> Mail:harz at biz.uni-muenchen.de
>
>-- 
>Dr. H. Harz
>Ludwig-Maximilians-Universit?t M?nchen
>Biozentrum
>AG Prof. Leonhardt
>Raum B02.059
>Gro?haderner Stra?e 2
>82152 Martinsried
>Germany
>Phone: +49(89)2180-74 259
>Fax: +49(89)218099-74 236
>Mail: harz at biz.uni-muenchen.de
>
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