User name gilman
Log entry time 12:13:10 on July28,2006
Entry number 175683
keyword=radiator problem diagnosed, solution developed
We have hooked up the maual controls to the radiator, thansk to JP and Xiaofeng who have loaned us a function generator. We see that both limit switches work. It appears that the VME 44 control board
limit switch functionality is dead.
While we have limit switch and movement functionality with the
manual controls, we cannot precisely determine the position from simply counting how much time we drive the motor. Ed Folts et al
have set up a camera about 1.5 meters from the rotary feed through,
so that we can visually determine the position. The camera is set up
to the "Bigbite" monitor which has been positioned in the center aisle
of the Counting House.
Eventually the camera will suffer radiation damage. The time constant is uncertain. When it happens we should contact Scott.
Because the manual controls are new we should not ask the regular shift workers to operate the radiator. The people who have been trained to operate the system include Brad Sawatzky, Guy Ron, and
Steffen Strauch. Dave Meekins built the boxes, seven years ago, and
could be helpful if problems develop.
The voltage supply in the Hall has been set to 22 V, to drive the
motor. The motion seems more or less smooth for supply voltage
from 22 - 29 V.