[Clas12_rich] CMM for measuring RICH mirrors during week of 6/13/2016

[James Dahlberg]

Step files would be good.
Jim
On 6/9/2016 9:03 AM, Marco Mirazita wrote:
> Dear Jim,
> thank you very much for your availability.
> Besides the radius, we would like to survey the contour of the mirrors 
> and verify that it is in agreement with our 3D model.
> We can provide step files of each mirror.
> Since we have a clearance between 2 mirrors of 3 mm, the accuracy of 
> the measurements should be something of the order of half mm or so, 
> definitely not bigger than 1 mm.
> I attached a photo of one of the mirrors.
> You will probably need to use some tool to hold the mirrors on the 
> machine, since they don't have any support on the back.
> Best regards,
> Marco
>
>
>
> Il 2016-06-08 17:39 James Dahlberg ha scritto:
>> Looks like the 16th would be fine. Sounds like you would really like
>> for the DSG to perform these measurements.  After everything is set up
>> and calibrated, a person could be trained fairly quickly to operate
>> the CMM arm and take the measurements.  One of our guys would have to
>> calibrate and run the software.  With our ~ 30um CMM, they would be
>> measured in one setup.  What accuracy do you need and is it just the
>> radius you need or a detailed profile.  Also, just to be sure, the
>> surface can be touched with a probe, correct?
>> Jim
>>
>> On 6/8/2016 8:40 AM, Tyler Lemon wrote:
>>> Dear Chris and Jim,
>>>
>>> Would the 60 um CMM be available for measuring the RICH mirrors some 
>>> time Tuesday June 14 through Friday June 17?
>>>
>>> As mentioned in my previous email on 5/25, there would be four, 
>>> square spherical-mirror segments with the largest being about 840mm 
>>> by 530mm with a radius of curvature of 2.71 meters.
>>>
>>> Would the CMM be able to take measurements of the entire mirror 
>>> segment without having to be reset? Also, who would perform the 
>>> measurements? Could the DSG use the CMM or would Survey Group have 
>>> to perform the measurements? Please let us know.
>>>
>>> Best regards,
>>> Tyler Lemon
>>> Detector Support Group
>>>
>>
>>
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