AUTOMATED SCOPE COVER + FLAT SCREEN
To augment the observatory automation process I added a remotely controlled scope cover system with built-in flat screen. I found this great idea from George on the DSI Yahoo Group. "Thanks for the great idea George :-)"
Amateur source: Georges site for the idea
Linear actuator source: Firgelli
BASIC DESIGN AND LAYOUT FOR MY OBSERVATORY
> The basic idea is just a hinging door that is moved in and out from the scope at its parked position.
> All construction is with wood except for the aluminum hinge blocks, bronze bearing bushings and steel hinge rod.
> Used my original EL Flat Screen from an earlier project.
> The Firgelli linear actuator used: Model- L16: 100mm stroke, 63:1 gear ratio, with 12vdc.
LINEAR ACTUATOR INSTALLED
The actuator slides down over (2) pins for easy removal.
A slotted aluminum bar was fabricated to allow actuator to be easliy adjusted for open and close positioning.
HINGE BASE INSTALLED
The cut-out is for the control planel and access to wiring. Also shown, is the electric eye used to sense scope positon for my Automated Motorized Roll-Off-Roof Control.
Roof can close only when scope is @ the PARK POSITION.
Manual toggle switch is a spring centered DPDT.
HINGING DOOR CONSTRUCTION
Materials: 1" x 2": fir strips with 3/8" birch ply- glued and screwed together. For the side strips with bronze bearings, I used red oak for better strength. The red oak is very hard, does not splinter easily. You can actually machine it, almost like aluminum. Great for mountings and brackets indoors. It's very fast and easy to work with.
3/8" diameter bronze bearings are available at most hardware stores. Bearings were glued in place with super glue.
RELAYS AND WIRING
Relays: Altronix- RDC-12