I Download and unzip. Since my plan called for purchasing the mirrors and mechanical parts there were several decisions to be made and several vendors to contact. I ground and figured the mirror with little troubles, making my focault tester, etc. spambots that search the internet for addresses to send junk mail to.) I redrilled the holes for the mirror cell and got ready to wrap it. Telescope Electronic Focuser : 16 Steps (with Pictures) - Instructables It turns out that sonotubes are a stock item in 8 inch, 10 inch, 12 inch, and sometimes even 16 inch diameters. Pretty dry but important! Two of the holes for the bolts were blocked by knobs. My telescope is the Orion ED80T-CF. Finally, attach your polar alignment device and align it with the hinge. A Pocket Sundial From a Broken Pocket Watch! Line the underside of the rocker box with a ring of ABS plastic to allow it to ride on the base. After waiting for the stain to dry for a day, I applied polyurethane in two coats, going over the surface with 0000 steel wool between coats. rod for the drive axle it would have a fairly fine motion. After researching several possible sources for a primary mirror, I decided to order an f/5 12.5 inch mirror from Discovery Optics. crafts, science & engineering, design, and technology. You can see that my Moonlite focuser was slightly larger than the sides of the tube. Similar photos at http://www.telescopegeek.com/gallery.htm require 100+ minute exposure times on his 20" telescope and $3200 camera. My newtonian telescope, like most others, came fitted with a nasty rack and pinion focuser. This was to allow the circle cutting jig to be attached to the board to cut the arcs from a center point of 25 inches above the ground. A couple setscrews and you're up & running with an off the shelf solution. Lining up this center point with the center of the top of the side bearing, I brought the corner of the side bearing up to the edge of the tube box and attached it with screws. I've been using the above pair Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. Actually getting the parts into my hands turned out to be more of a challenge than I would have expected, but in the end, I have a wonderful telescope that I enjoy very much. By adjusting the bolts, the mirror can be pointed toward the correct spot. But who cares, really? Plus it comes in black, so you don't need to paint it (or worry about paint flaking off it). I began building it in the spring of 2008, but the bulk of the work was done in July of 2008 with first light occurring on July 25. I placed my telrad, optical finder, and an eyepiece on the focuser end of the tube and, using a broomstick as a balance point, found that the tube balanced 22 inches from the bottom. Im quite happy with the result, and the view in its large mirror is phenomenal. I had some carboy caps that make good knobs. Likewise, the side bearings are made of two identical semicircles of 5/8 inch plywood glued together, creating side bearings that are 1 inches thick. CNC files (optional) Download the Sketchup files. An electronic focuser, which moves the focus knob through a combination of hardware and software, solves this problem. It take automatic control of the CCD camera and focuser, and dances around magically on the screen, arriving at perfect focus within about 30s to 3 minutes depending on where you started from. installations. The balance point determines the height of the rocker sides, so I had to get this far before I cut the wood for the base. If you don't want to go that route, contact me at gary.hethcoat@gmail.com since I have a lot of spare parts and I can sell you a "kit" with a PCB and only the parts you need. I Hope to give you ideas if you are thinking about building one for yourself! my 12.5" trackball, but I didn't The heaviest piece is 40 lbs, and the total scope weighs about 60 lbs (not counting the baffle). Edited by sunrag, 28 May 2020 - 10:44 PM. I drew a guide line straight down the side of the tube and cut the veneer to length with one extra inch on each side68 inches long. All in all it seemed like a pretty robust design, so I gave it Inside the OTA is a ring of tightly fitting flocking paper that prevents any light getting in around the drawtube. I have one on my 12" f/5 truss dob and the focuser knob is on the top surface of the UTA. Home centers and hardware stores did not carry large sizes. This NEMA-17 direct drive stepper motor is available from Adafruit and many other sellers. Our websites use cookies to improve your browsing experience. Orion Dynamo Mini for powering a Nexstar 6SE? This cost around $100 to build and all of the components came from. I waited until dark and pointed the scope at the sky. (Sorry you Here's a detailed response from a thread at CloudyNights:http://www.cloudynights.com/ubbthreads/showthreaded.php?Cat=0&Number=4721255 "The image scale is wrong on the M31 image, fits too much of the galaxy in for even a 35mm chip. When you add the minimum distance from the eyepiece to the secondary mirror together with the distance from the secondary mirror to the primary, the total length should be the primary mirrors focal length. His project is very well documented. Not sure if it is available in the USA. I ended up modifying it a bit after printing. I was inspired to build telescopes during a trip out to McDonald Observatory in west Texas, where I saw a 36 fork-mounted telescope, tiny in comparison to the huge research telescopes at the site. We moved the operation to a nearby park and got a focused image of the most distant trees (300-400 yards away) quite easily. a "rubbery" feel. In the "ARDUINO FIRMWARE" folder, in it you will find a ZIP file "myFP2-Firmware 312-1.zip". This is not recommended for shared computers. Did you make this project? After the glue dried but before the clamps were removed, I added corner braces to all four corners of the tube using glue and brads to hold them in place. Then it was time to stain and finish. Share it with us! I wasn't there so i can be 100% but i do not think my friend was lying to me and i believe the pictures are from my telescope my kids use it for stargazing a lot i have seen some deepspace but i use it mainly for sketching the moon and i like to view solar flares. flexing. Once Id built a CNC router, I embarked on my third telescope, featuring a 16 primary mirror with aluminum trusses, wide vertical bearing arcs, a steel front-adjustable mirror cell, and a rotating base. Here is a simple 3D printed helical focuser that cost just a few cents (assuming you have a 3D printer). You can easily, and economically (10$) build a Crayford Helical Focuser like the one pictured above in one evening with simple tools. The mount and tripod are pretty much useless for astrophotography. Look down through the empty focuser. Orient this assembly to allow you to view an object on the far horizon. haven't yet found any design elements that need improvement. You will look through these as you rotate the wheel. Subscribe to the premier DIY magazine today, Community access, print, and digital Magazine, and more. Primary telescope mirror aftermarket, homemade, or custom-made. The holes in the main bracket the match the holes in the plate are oversize to allow for this alignment. I didn't receive any confirmation email after a few days, so I tried to send them an email. Nice work and great instructable! - Bill. The mirror cell: University Optics (eventually). Until I see photos of this scope setup for these pictures and an explanation of the exact equipment used, I cannot believe that these pictures were taken with this OTA. (Technically, it should have been 62.5 for a 12.5 inch f/5, but when the mirror came it had a note on the back that the focal length was 61 inches.) Accordingly, with 1.25 focuser, you can use 1.25 eyepieces, with 2 focuser - both 2 eyepieces and 1.25 (through a special . It interfaces to the computer via USB and comes with an ASCOM driver. I have built a homemade electric focuser for my Celestron 8SE using a radio control hobby servo and some spare parts. New Creation Tamil 6.96K subscribers Welcome to New Creation Tamil Our Channel include of Guiding Videos: 1.DIY Projects 2.Awesome Ideas 3.Tips You are inter with New Creation Tamil you can enjoy. I have not yet figured out a better way to hold the tube. My first telescope I built was a 10" F8. In my build, the cage was cut on a CNC router from plywood, with threaded T-nuts added to support a truss assembly. Their step by step instructions were invaluable to me as I built this scope. Community Forum Software by IP.BoardLicensed to: Cloudy Nights. on Step 5. 11 years ago A I am working on a diy focuser design for my 6" F/8 telescope and asking suggestions for simple focuser. You will need to order one sized for your telescope's focuser shaft size. Shorter thread side will be used to attach the eyepiece. drneilmb, thanks for sharing the focuser design. The spider, or secondary mirror holder, will suspend the mirror in the optical path in order to direct light into the focuser. After the second call, I received a response that it would be ready at the end of the following week. Homemade DIY focuser for telescope with computer control - NEUTRAL.org The dimensions of the Tube Box Sides are based on the outer diameter of my tube14 3/16. During assembly, youll attach the trusses to the mirror box, then sit the secondary cage on top and bolt everything in place. Built one of these http://emediadesigns.com/focuser/ working really well only cost less than 40.00. The next day, I called back to ask their opinion about the kind of spider and secondary holder to order. weight. I did not wrap the tube until I had completed the base. I do have another tube that can be used around the drawtube, but it doesn't really add anything. I used a hole saw to cut a wooden plug to fit inside the A 6 in primary mirror does not have enough weight to make the dob stable. Depending on your telescope, one of the Brackets that Robert has may work for you. This Instructable describe the planning, design, and parts of the scope, as well as the process of building The scope. Focuser minimum height is 50 mm and maximum a little over 90 mm so it is good overall. Both cameras have fairly small megapixels by todays' standards, and are certainly obsolete, but do the job extremely well!
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