Slit (shutter)
|
The dome slit (shutter) is a scissor opening that is opened and closed from a desk switch (Figure 1). The switch can be pushed into the open or close position and left there as there are limit switches to stop the shutter doors at either extreme position. When the switch is activated the slit motor will run until the slit hits either a limit switch or the desk switch is put into neutral. When the telescope is pointed near straight up one may have to rotate the dome more than 90 degrees so that no occultation of the telescope lenses occurs. When the dome is stowed, the orange line at the bottom of the dome shutter should line up with the orange line painted on the East of the dome support. Alignment is not critical and positioning to within about 0.25 meters is sufficient. Figure 2 shows the proper dome shutter stow position. |
 Figure 1: Desk control, the slit (shutter) control is in the middle, just above the floor buttons.
|
Last modified: Wed Jun 30 11:45:53 PDT 2010