[OpenSPIM] twister motor belt slipping

[Michael Redd]

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-Universität München
Biozentrum
AG Prof. Leonhardt
Raum B02.059
Großhaderner Straße 2
82152 Martinsried
Germany
Phone: +49(89)2180-74 259
Fax: +49(89)218099-74 236
Mail: harz at biz.uni-muenchen.de<mailto: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



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--
Dr. H. Harz
Ludwig-Maximilians-Universität München
Biozentrum
AG Prof. Leonhardt
Raum B02.059
Großhaderner Straße 2
82152 Martinsried
Germany
Phone: +49(89)2180-74 259
Fax: +49(89)218099-74 236
Mail: harz at biz.uni-muenchen.de<mailto:harz at biz.uni-muenchen.de>
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