Date: Fri, 24 Nov 2006 09:10:24 -0500 (EST)
From: jegunn
Subject: Re: 2.5m obslog 20061122 (MJD 54062)
I now recall that we had the problem this summer, and what was wrong
was nothing with the latches, just that the hall effect sensors
had drifted out of position, so that they were not INDICATING
latched correctly. French, could you check?
--jim
On Thu, 23 Nov 2006, stephanie snedden wrote:
> Jim,
>
> There was no obstruction and the saddle was all the way up. We did check
> that.
>
> Steph
> On Nov 23, 2006, at 9:12 AM, jegunn wrote:
>
>>
>> Problem: We had to cycle latch and unlatch saddle latches a few time when
>>         mounting imager. low hytraulic pressure?
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>
>> This is usually a symptom of either incorrect pressure on the airsprings
>> (too high) or some obstruction keeping the saddle from mating properly.
>> When it happens, make SURE that the saddle is all the way up in the
>> corners. With the airsprings set correctly, the latches often have to
>> lift the saddle a millimeter or so, but much more is indicative of
>> something wrong. French, you should perhaps lube the locating pins;
>> just smear some moly grease on them. The saddle latches are not
>> really working very hard, so if the camera latches properly, low
>> pressure is not likely to be the answer. It would be good to have a
>> more convenient display of the latch pressure than exists currently.
>>
>> thanks
>>
>> --jim
>>
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>