I used to see this in a previous life, but when they replaced the
stainless steel helix with a composite (carbon-teflon?) one, this
problem disappeared.  You may want to ask your SE.
Steve Schaub
Systems Engineer, WNI
BlueCross BlueShield of Tennessee
423-752-6574 (desk)
423-785-7347 (cell)
 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Richard Sims
Sent: Sunday, March 19, 2006 7:07 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] A 3494 foible, FYI

This weekend we encountered a 3494 foible which 3494 customers should be
aware of...

The robotic actuator achieves vertical motion via a roughly 5' tall
steel helix. The helix is lubricated with a grease. Over time, the
grease dries out - and solidifies. The robot then strains to gain
elevation, which over-taxes the vertical drive motor and causes an
electrical Intervention Required. The associated panel message specifies
an IBM service call. They will respond by cleaning and re- lubricating
the shaft.

To prevent an outage of some hours, you may want to assure that your CE
is performing periodic re-lubrication of this assembly. One would think
that it would be on the list of PM tasks, but apparently it is not.

Other robotic library types may have a similar vulnerability.

    Richard Sims
Please see the following link for the BlueCross BlueShield of Tennessee E-mail
disclaimer:  http://www.bcbst.com/email_disclaimer.shtm