[Opera-CONNIE] vacuum pump status

Fri Jan 16 18:53:36 BRST 2015

Actually, when I was talking to Alexandre I "suggested" that the best for
us would be to borrow his backing pump.

But he was not very in favor of that. I suppose he is going to fix it and
use it soon.

Let me talk to him again on Monday.

Herman

2015-01-16 16:46 GMT-03:00 Juan Estrada <estrada at fnal.gov>:

>  Andrew suggests to investigate if the backing pump in Alexandre’s setup
> is working.
> Maybe we could borrow the backing pump from that system. Most of the time
> the failures
> on these systems come in the turbo pump.
>
>  On Jan 16, 2015, at 11:38 AM, Herman P Lima Jr <herman.lima.jr at gmail.com>
> wrote:
>
>  Hi all,
>
>  I just talked to a mechanical engineer here at CBPF - Alexandre Mello.
> Actually, he has the same vacuum pump here in his lab, and it is also
> broken!
>
>  If the problem is really the BACKING PUMP, he proposed that we use a
> mechanical pump available here to replace the one broken. It is not the
> same pump, but it would do the job.
>
>  The replacement is not plug-and-play because of adaptors needed between
> the pumps. We would need first to buy a longer pipe (that is easy) and also
> the adapters for both ends.
>
>  There is also a restriction concerning the operation of this new pump,
> since it could send oil back to the system! What would be a disaster of
> course. There must be a automatic valve between the pumps that would
> prevent it to happen.
>
>  Let's discuss that in more detail next week in a meeting.
>
>  Herman
>
> 2015-01-16 11:29 GMT-03:00 Martin Makler <martinmakler at gmail.com>:
>
>> Hi Juan.
>>
>> That's what I was wondering.
>> Can you send me some specifications so that I can look for a pump that
>> could do the job?
>>
>> Cheers.
>>
>> Martin.
>>
>> On Jan 16, 2015, at 12:21 PM, Juan Estrada <estrada at fnal.gov> wrote:
>>
>> > Is there a pump at CBPF that we could borrow?
>> >
>> >> On Jan 16, 2015, at 7:40 AM, Guillermo Fernandez <
>> fmoroni.guillermo at gmail.com> wrote:
>> >>
>> >> Pamela, Alejandro and Stephan, thanks for all the work. It has been a
>> lot.
>> >> Kevin and Andrew, thanks a lot for all the support from Fermilab. It
>> was very important for the operation.
>> >> It is the second time we need to face a big problem with the detector,
>> and I think in both cases the response was good.
>> >>
>> >> Regards,
>> >> Guillermo
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>> On Jan 16, 2015, at 9:10 AM, swagner at cbpf.br wrote:
>> >>>
>> >>>
>> >>> Dear all,
>> >>>
>> >>> we checked the vacuum pump again today and followed the suggestions.
>> We unmounted the protection cover over the fan. When we tried to move it
>> manually, there was heavy resistance and it was difficult to turn at some
>> points. We left it in a position where it was more easy to move and
>> switched the pump back on and it was working. Before reassembling
>> everything again we switched the pump on various times for a short amount
>> of time and occasionally it stopped working again. Moving the fan against
>> the resistance again solved the problem temporarily.
>> >>> At the times when the pump was running there was a strange sound
>> hinting to some internal friction. Probably there is either a problem in
>> the motor or there's something wrong with the diaphragms.
>> >>>
>> >>> For the time being we decided with Guillermo to reassemble the pump
>> again and wait for further suggestions from Fermilab. We will leave Angra
>> today. Alejandro and Pamela will come to Angra again next week and try to
>> fix the pump then when new information is available.
>> >>>
>> >>> Cheers,
>> >>>
>> >>> Stefan, Alejandro and Pamela
>> >>>
>> >>>
>> >>>
>> >>> Quoting Guillermo Fernandez <fmoroni.guillermo at gmail.com>:
>> >>>
>> >>>> In fact the capacitors look they come with the case and cables from
>> factory:
>> >>>>
>> >>>>
>> http://www.electronicon.com/index.php?partno=E33.C78-500805%2F27E151&partnosubmit=Search+%C2%BB&id=423&L=1&search=partno
>> >>>>
>> >>>> I found I have a similar capacitor in a water pump I bought two
>> weeks ago (attached). I think it would be a good idea to try to remove the
>> capacitors and take them to Rio to test them. let's take several pictures
>> of the place they are connected and the way the fuse box is organized. I
>> assume none of the cables from the capacitors go directly to the motor.
>> There should be a terminal block inside the box.
>> >>>>
>> >>>> Also, Andrew from Fermilab, suggests to try to move the shaft. You
>> can do it from the back of the backing pump. It has a fan, after removing
>> its red cover. The cover is removed unscrewing a few screws. He tried first
>> this at Fermi, these were his words:
>> >>>>
>> >>>> "you should feel the vacuum stroke. Easy movement then resistance on
>> the valve closing"
>> >>>>
>> >>>>
>> >>>> Pamela, Alejandro and Stephan:  again, thanks a lot for all the
>> work. In all this craziness of trying to do as many things as possible we
>> may forget to say thanks.
>> >>>>
>> >>>> Guillermo
>> >>>>
>> >>>>> On Jan 15, 2015, at 4:35 PM, Guillermo Fernandez wrote:
>> >>>>>
>> >>>>> Hello,
>> >>>>>
>> >>>>> unfortunately, the fuses in the backing pump were not the problem.
>> Alejandro, Pamela and Stephan, after checking that the fuses were ok, tried
>> to start the pump again in 115 and 230V, but the motor didn't start. In
>> both cases the green light of the switch was on. They also measured the
>> current for 115V, it was 2A.
>> >>>>> They tried to take apart the capacitors, but it was not possible
>> from outside. If we decide to remove them, we need to disconnect the cables
>> from inside the fuse box. They took a couple of pictures of the capacitor
>> model.
>> >>>>> I told them to assemble the pump again, and leave it on the bench.
>> >>>>> They will stay until tomorrow in Mambucaba. If no other suggestion,
>> they will return to Rio tomorrow.
>> >>>>>
>> >>>>> Guillermo
>> >>>>
>> >>>>
>> >>>> --
>> >>>> Mensagem Verificada pelo AntiSpam CanIt CBPF
>> >>>> --
>> >>>
>> >>>
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