The stepper motor that drives the target ladder on T2-MK2 has failed. This is the cause of the difficulty moving the target ladder yesterday afternoon (see previous e-log). This was confirmed this morning by attempting to move the T1-MK1 target ladder in the storage pit using the portable control box - the ladder moved with no issues.
The motor is scheduled for replacement during the 2016 winter shutdown unless it is needed more urgently. Operations have been informed that T2 ladder movement will not be possible until this motor is replaced. |