Main INDEX
Monthly INDEX
PREV
NEXT
User name Techs
Log entry time 13:52:16 on June 24, 2007
Entry number 206481
keyword=Replaced middle bogie motor #4
After a series of adventures Scot replaced the middle, outer bogie motor.
The motor controller gave an over speed fault when the wheel hit a crack
in the floor plate. At one point the speed fault on the next try was on
motor 3, then the next try was motor 2. The spectrometer would back up
and run ok, till we tried to cross the crack. Motor 4 would fault on over
speed. We tried putting a couple of different shims under the wheel at
the crack, to no effect. Eventually we had motor 4 spin up while 1, 2,
and 3 just sat there. It did that three times in a row. We got a spare
motor and swapped it out. Spectrometer started running ok.
A copy of this log entry has been emailed to: fansler@jlab.org