Dobsonian Base Parts

Upright Side Panels

Dobsonian BaseSkyquest LogoHere you can see the new style profile of the sides, which is more sleek and contoured than the original Orion Skyquest scopes, and sports the SkyQuest IntelliScope logo.








Dobsonian side insideCorrecTension bearingsOn the inside face of the dobsonian side panels can be seen the altitude CorrecTension bearing pads, which are made of Ultra-high molecular weight (UHMW) polyethylene.

These act as a braking system to provide enough friction to prevent the tube tipping up/down whilst you change eyepieces.

The squarish hole below is the back of the communications port where the (optional) IntelliScope Computer Object Locator plugs into the base unit.




Com PortComputer control portComputerized Controller Port for the COL.







Front Brace Board

Back BoardBack Board Vertical Stop HoleNext we have the front brace board. This provides strengthening and stability to the side upright panels of the dobsonian base, and holds everything together. When screwed together the front and sides are rock solid. They need to be for the weight they have to carry!

The curved section actually goes at the top. Pre-drilled holes can be seen where the Vertical Stop Knob is screwed in on one side, and the Eyepiece Holder Bracket gets attached on the other face.




Top Baseplate

Scope BaseAzimuth RecessThe next layer down gives us the circular base (top baseplate) which the upright sides and back screw onto (pre-drilled holes can be seen for attaching these).

In the middle you can see the central axis pivot hole, and the azimuth digital encoder connector recess port, also seen here in close-up.





Ground Baseplate

Azimuth Bearing baseFinally we are down to the actual Azimuth Bearing base, the ground baseplate. This bears the weight of the whole telescope. You can see the white Teflon bearing pads on the upper side, and black feet get attached to the underside, and the feet are obviously the parts that sit on the floor.






Teflon Azimuth Bearing PadTeflon Bearing PadThese close-ups show the white Teflon bearing pads which provide the "smooth" rotational motion of the scope in azimuth. The bulk of the weight of the telescope, and upper base rest on these pads.

These are the pads which folk then like to try different ways of improving the friction/stiction aspect so as to reduce any jerkiness when rotating the scope at high magnifications.





Nuts and BoltsLast but not least we need a means of holding it all together. Various nuts, bolts, screws and tools are supplied in plastic bags. In clockwise order from top left they are:-

  • Black plastic feet
  • Black altitude bearing cylinders and screws
  • Base assembly wood screws
  • Vertical Stop Knob
  • Brass Bushing for main azimuth central axis bolt
  • 2.25" long Azimuth axis head screw, fender washers, hex lock nut and Allen key



Next section: Inside the Main Telescope Box

Other Topics in the Assembly section: