Fwd: why tylanbpsg has a cable problem

Aaron Partridge aaronp at micromachine.stanford.edu
Sun May 18 16:03:28 PDT 2003


Rohit has a good point -- I didn't say how to stop the motors.

As he writes below, you press the "manual" button.  Pretty easy!


> Aaron:
>  I fully agree with you. Perhaps you should also mention that the way 
> to
> stop the tube from being pulled in when idle is by pressing the 
> "manual"
> button on the panel. If users have not been trained about it, they may 
> not
> know.
>  --
>   Rohit
> On Sun, 18 May 2003, Aaron Partridge wrote:
>> tylan users,
>> please excuse a brief rant:  when we are done with a tylan tube and 
>> the
>> door is closed the door motor will keep pushing the door -- even 
>> though
>> it is already closed.  when the motor runs like this there is supposed
>> to be a slip clutch safely sliding away, but sometimes that 'clutch' 
>> is
>> the pully on the cable.  then guess what?  the cable gets trashed.
>> where does it get trashed?  on the pulley where you can't see it when
>> the tube is closed.
>> when a tube is closed and you hear the door motor running, that what 
>> is
>> happening.  you can and should stop this.  when i was trained (in 
>> 1995)
>> this was standard procedure, now most lab users don't have a clue 
>> about
>> it.  walk by the tubes some time and listen, you can usually hear a 
>> few
>> of them grinding away.
>> aaron.
>>> Hi Tylanbpsg users,
>>>    I just wanted to elaborate on the problem "Part of the
>>> wire that pulls out the boat almost breaks" reported by
>>> user Yishida.  A cursory look at the cable assembly reveals
>>> nothing serious; however there is indeed a seriously frayed
>>> part of the cable (about 2/3 of the thickness is gone)
>>> that's hidden inside the user-end pulley housing.  It's
>>> visible only when the tube is moving in or out.  Be very
>>> careful when using the tube.
>>> Ben Chui

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