User's Guide to the Lick 36" Refracting Telescope


Introduction
Dome
General
Floor
Slit (shutter)
Windscreen
Rotation
Lighting
Telescope
General
Balance
Lens Cover
Motion
Position Indicators
Finderscope
Tangent Arm
Reversal
Access Ports
Control Desk
Console
Contents
Limits
Pointing
Weather
Safety
Observing Hits
Checklist
Trouble Shooting

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Slit (shutter)

The dome slit (shutter) is a scissor opening that is opened and closed from a desk toggle switch (Figure 1). The switch can be pushed into the open or close 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 the stop (neutral) position. When the telescope is pointed near zenith 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.


Figure 2: Bottom of the dome slit (dome in the stow position)