visio-dobsonian telescope 6-inch f8 design - blueprint (us...
TRANSCRIPT
Designs are modified from the book “Build your
own Telescope” by Richard Berry.
All modifications are mine based on requirements
or alterations needed due to materials or tools
available at the time of my build.
For further instructions, read the book! I make no
warranty on the accuracy of these designs. This
is how I built mine.
Shawn Kirchdorfer - Arlington, Texas
Newtonian Telescope
6-inch f/8
Dobsonian Mount
January 12, 2009
SIZE FSCM NO DWG NO REV
SCALE 1/4 : 1 SHEET 1 OF 9
H
G
F
E
D
C
B
A
8 7 6 5 4 3 2 1
H
G
F
E
D
C
B
A
8 7 6 5 4 3 2 1
TOP
FRONT
SIDE
Metal 90 degree
Angle bracket (x2), slightly
bent to match brace angle
Half sheet of ¾-inch Plywood (48"x48")
Three 10" lengths of 2"x4"
Two 6½" rounds of ¾” MDF board or
other rigid circular item such as PVC
pipe flange.
½” strip of aluminum strapped around diameter
and secured with screws if wood is used.
Ø 16
1/8-inch Plexiglass
or
¾” wooden counter top with Formica type
covering can be used instead.
* If counter top method is used then disc #3
is not needed.
These marked pieces are used ONLY if a cylindrical cardboard concrete tube is used for
the tube body. Otherwise they are not used.*These marked pieces are OMITTED if a cylindrical cardboard concrete tube is used for
the tube body.** *These marked pieces are ALTERED if a cylindrical cardboard concrete tube is used for
the tube body. Cut outer diameter circular.**
Ø 16
Ø 16
48.00
Cut-out for
Azimuth Scale
window.
(Optional)
Disc #2
Disc #1
48.00
90 9090 90
Mirror Cell
Rear
Bulkhead
7.00
7.00
Central Bulkhead
Front
Bulkhead
Ø 6.5
Ø 16
Disc #3
2.00
8.00
8.00
Altitude
Bearing
Mounts
to Side
of this
box here
Altitude
Bearing
Mounts
to Side
of this
box here
Rocker Base
Side Board
B
Support Strut 3 of 4
Support Strut 4 of 4
21.75
6.75
13.00
15.00
2.00
7.25
6.50
Rocker Base
Side Board
A
Support Strut 2 of 4
Support Strut 1 of 4
Front Board
16.00
8.50
2.00
Ø 1.25
10.00
Eyepiece Holder (opt.)
* * * *
*
*
*
*
*
*
*
*
*
*
Half sheet of ½-inch Plywood
(48"x48")
90 90
Glue and nail
here
Screws only
here 0.50
7.00
8.008.00
8.00
7.00
7.00
48.00
48.00
6.32
6.32
Ø 2.00
Ø 0.75
Ø 0.50
Ø of mirror + 5/16th inch
0.25
Ø 0.31Ø 1.00
R 1.00
0.75
0.25
Ø 3.54
0.25” T-Nut
MIRROR CELL ASSEMBLY - A
Ø 0.25
Ø 1.00
Ø 0.32
Ø 1.00
Ø 5.50
0.25” T-Nuts (x3)
REAR BULKHEAD ASSEMBLY - A
0.75
Ø 2.00
Ø 0.75
Ø 0.50
Ø of mirror + 5/16th inch
0.25
Ø 0.31Ø 1.00
0.75
0.25
Ø 3.54
0.25” T-Nut
MIRROR CELL ASSEMBLY - B
Ø Equal to MINUS ¼ inch
of Inner Diameter of Tube
Ø 0.25Ø 1.00
Ø 0.32
Ø 1.00
Ø 5.50
0.25” T-Nuts (x3)
REAR BULKHEAD ASSEMBLY - B
0.75
Ø 7.00
Or
The inner diameter
of telescope tube
FOCUSER HOLE PLACEMENT FORMULA
Telescope in use at a star party. Telrad
mounted near top of tube.
The black rectangles at end of tube are
counter weights*. (*dead computer hard drives)
Telescope in use at a star party. Telrad
mounted near top of tube.
The black rectangles at end of tube are
counter weights*. (*dead computer hard drives)
Painted with gray primerPainted with gray primer
Fully painted with setting
circles and eyepiece tray
Fully painted with setting
circles and eyepiece tray