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Orion Dynamo Mini for powering a Nexstar 6SE? Among amateur telescopes, the most common are focusers with landing diameters of 1.25 ", 2", rarely 0.965 ", and even less often - 3". The focuser knob had two set screws. You won't need to write any sketches from scratch, but you will at least need to figure out how to upload them to the Nano. The silly colours are mainly due to me experimenting with various clothes dyes in the anodising. As the telescope tilts toward the horizon, the mirror must be supported on its edge. Secondary mirror with spider holder Search on eBay for a matched set. His passion is using CAD design and his homemade CNC router to bring large wood projects to life. This is my copy of the telescope that Sir Isaac Newton presented to the Royal Society of London in 1671, and is considered to be the first successful reflecting telescope. But, like many of you I'm sure, the biggest reason I'm doing this is for the pure geeky fun of it! I decided to order a mirror cell from them because the owner had talked about a new cell he was excited about. Some of the very best planetary and deep sky pics I have seen have come from a Fuji S3 professioanl camera [based on a Nikon body] and a Canon 20Da, which was designed with [I think] a user replaceable inside the mirror box filter for astral photography. It features 2 semicircular arms, and mounting points for the trusses (T-nuts are fine), as well as a lid to keep the mirror safe when the telescope is not in use. think that design would be rigid enough under the weight of a diagonal Sonotube (14 inch diameter, 12 feet long): $70, Focuser (GSO 2 speed low profile Crayford): $139, Total cost for supplies for this project: $1700. exactly 2" with adhesive labels placed one at a time inside the tube I marked the spot and moved things back inside to install the mirror. Someone is pulling someone's leg here. I used a hole saw to cut a wooden plug to fit inside the All that remained was to design and print a bracket, and buy the needed parts. They suggested a construction supply place on the other side of the city that I had not called yet. It was easy enough to drill a hole and tap threads for a They even offered to send the spider, secondary holder, and secondary mirror immediately so that I could begin working on the tube while I waited for the primary. The pivot bolt consists of a 1 1/8 inch brass spacer with an 11/16 inch outer diameter, a 3/8 inch bolt 2 inches long, a stop nut, and two large washers. The heaviest piece is 40 lbs, and the total scope weighs about 60 lbs (not counting the baffle). Robert Brown did an excellent video on how to work out your stepper motor requirements. Orient this assembly to allow you to view an object on the far horizon. And bolt to scope 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. I also wanted to buy the other mechanical partsmirror cell, spider, secondary holder, and focuserso that the performance of these pieces was not limited by my skills. The base of the telescope should be a wide, sturdy square or circle of wood with teflon bearing pads matched to the ABS plastic ring of the rocker box. The diameter of the focuser is usually indicated in inches. One 6in dob I made was a complete failure. 11 years ago widening the hole. So, for my telescope I used a 6mm to 5mm coupler available on Amazon. As it turned out, the mirror cell was too large to fit into my 14 inch sonotube. Im quite happy with the result, and the view in its large mirror is phenomenal. I centered the focuser 8 inches from the top of the tube, using a 2.5 inch hole drilling saw with smaller holes for the bolts that would hold the focuser. As I set of the scope, several club members came over to check things out and it was nice to hear the positive comments on the appearance of the scope. After picking up a copy of The Dobsonian Telescope by David Kriege, I built my first telescope with a 12-diameter mirror, then later tackled a 12 lightweight scope. in the tube so they'll hit the knitting needle before your drawtube runs The mirror cell: University Optics (eventually). Position "0" is with the focuser all the way IN (at least for a refractor). It's the same in form, but has a perfect, true 13.35mm hole. on Step 1, interesting build, its just like my old Odyssey brand scope from the mid 1990's. The kit just contains the electronics - it is up to the user to find a stepper motor and attach it to their own telescope focuser. A neet site: http://www.astropix.com/HTML/I_ASTROP/CAMERAS.HTM Cool instructable, Dude! Share it with us! Step 3The Side Bearings and Rocker Sides. And for those who like to work with 3D printers, both the single speed and dual-speed versions could easily be printed. A celebration of the Maker Movement, a family-friendly showcase of invention and creativity that gathers The focuser 'knob' on the Celestron is just a rubber sleeve that usually pulls off easily. The cell from Anttler's, for which I had received a refund, had arrived. All i did was supply the telescope as far as his camera equipment i dont know what he used i never saw it all i know is he had my scope for about a month while i was traveling and he gave me these photos. larger diameter. And you can tell it's not a mosaic because the stars at the corners show coma/field curvature artifacts. The original Crayford Focuser is on display there. This will determine the size of the coupler you will use to connect the stepper motor. A wide hole will let the knitting needle creep When you figure out Your astrophotographer friend may have included his own images from his setup. I used one of these scrap pieces to draw an angle of 70 degrees to the edge of the arc so that I could later place the teflon pads on the arcs. Find a special something for the makers in your life. I plan to use an FTA over it in case an extension is needed. I used the "LEDandBuzzer" and "TestStepsDRV8825" tests. Start with the small components first. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. You really need a step ladder even for my 10" when pointed overhead. During assembly, youll attach the trusses to the mirror box, then sit the secondary cage on top and bolt everything in place. I attached keepers 1 inches wide by 5 inches long, extending above the bottom of the arcs by about 1 inches. For the ATMer I do find that there are an endless number of parts that can be designed and printed for home built telescopes and binoscopes. tube and nut that fits the outside threads. ill ask him for a detailed list of what he used and when i get that ill post it here for you. The basic points I wanted to cover: What did I end up with? More Homemade Refractor Telescope DIY Erecting Prism Binoviewer Focuser here: Did you make this project? I took the whole tube assembly outside. The box should be deep enough to allow the mirror box to swing all the way down. My plan for wrapping the tube seemed good, but I am not too pleased with the final result. Pioneered by John Dobson in the 1960s, the instrument combines a Newtonian reflector telescope with a unique two-axis movable base. Fairly easy to build and could be adapted to suit any SCT focuser. Homemade astronomy. Accordingly, with 1.25 focuser, you can use 1.25 eyepieces, with 2 focuser - both 2 eyepieces and 1.25 (through a special . Topics such as focuser. Nice one. my 12.5" trackball, but I didn't I am well versed in technology, have all the tools necessary to build my own! #2 knitting needle would be just about right. You will look through these as you rotate the wheel. The day I received the refund, I ordered a mirror cell from University Optics. 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. Rock Paper Scissors Using Tinkercad Circuits and Arduino, Punchy the MECH & the Autonomous Fight Club, Soft-sensor-saurus | an E-textile Soft Sensor Soft Toy With LED Light. It interfaces to the computer via USB and comes with an ASCOM driver. you don't need to paint it (or worry about paint flaking off it). I do it with aluminium alloy, aluminium tube and nice work. Remember: It is the quality and SIZE of the capture chip, NOT the megapixels that determines quality. installations. A project collaboration and documentation platform. I was finishing this inner debate when I got a copy of the book The Dobsonian Telescope by Kriege and Berry as a Christmas gift. Two inch internal diameter drawtube. Fairly easy to build and could be adapted to suit any SCT focuser. I sanded all parts of the telescope with 220 grit sandpaper followed by 400 grit, making a very smooth surface to apply the stain. You currently have javascript disabled. Staples or finishing nails work fine, but be sure they dont bump up above the surface of the plastic. stronger, but would give me a coarser focus action because of their accessible by all ages and skill ranges. Best Wishes, Reply Here is a link to the main FILES area on Robert Brown's site. until a 2" eyepiece or 1.25" adapter is snug. I particularly like that the design can be integrated directly into the focuser board to make a very, very simple UTA. The cutting diagram in (figure 1) shows how I cut the required pieces from two 60 X 60 pieces of Baltic Birch plywood, one inch thick, and one 5/8. It may take you a while to adjust the image correctly, but it's not hard to do, just time consuming. Star Adventurer Pro Pack Counter Weight Bar Thumb Screw Upgrade. This is the first telescope that I have built. Pioneered by John Dobson in the 1960s, the instrument combines a Newtonian reflector telescope with a unique two-axis movable base. At some point in the building process, my goal became to finish the scope by RocheStar Fest, an annual event of the Rochester Astronomy Club. Below are cutting diagrams and diagrams of the rocker and tube box with side bearings. This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". Able to make myself using my own humble tools (or toys as the pros will call them!) Perfect for astrophotography or during high power planetary observation. Connect the Arduino USB cable and upload some test sketches. Be creative! Over how many nights did this photography session take place? In order for the Rocker Box to pivot on the Ground Board, a center pin is placed in a hole at the exact center of the Ground Board and Rocker Bottom. Another vote for Pierre's helical Crayford design. Pierre's Helical Crayford gets my vote hands-down for elegant simplicity. 1N5408 3A Diode (you may need to make the pins smaller to fit through the holes in the board. Meade Zero Image-Shift Electronic Micro-Focuser This high precision focuser allows you to obtain an extremely accurate image focus. Once your telescope is assembled, drape black woven velveteen around the truss assembly, clipping it with safety pins. Concluding that I would not be able to buy a tube off the shelf, I found a couple of companies that took special orders on cardboard tubes. It doesn't. A tilted focuser will have no effect on the image quality. Or in my case, back to SolidWorks :-). really stiff and light for their size, and even though a #2 is pretty I marked the expected position of the secondary by measuring 61 inches down from the end of the tube. I drilled holes for the screws that avoided the location of the ring, and attached the rocker bottom. This consists of a small black box of electronics. My newtonian telescope, like most others, came fitted with a nasty rack and pinion focuser. I pointed it at distant trees and had no problem bringing the image into focus with all of my eyepieces. I would also like to know about how you can take such fantastic pictures without a field rotator and an autoguider system. This might have been tempting if I wanted to build a 6 inch scopeat that size, they say that first-timers do pretty well at grinding and figuring their own optics. The next day my wife called me at work to tell me a box had arrived with telescope stuff. Well, it sort of looks like a focuser.. See pictures below. The Crayford Focuser and DIY Focuser for Homemade Telescope By trukmeeilee in Circuits Cameras 3,461 3 1 Download Favorite By trukmeeilee Follow More by the author: The Crayford focuser is a simplified focusing mechanism for amateur astronomical telescopes. 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. Look down through the empty focuser. Just to make sure I liked the stain, I applied some to a piece of scrap wood. Today I purchased what is called atank nipple in India. Page 1 of 2 - DIY focuser design - posted in ATM, Optics and DIY Forum: Hi I am working on a diy focuser design for my 6 F/8 telescope and asking suggestions for simple focuser. I will post the pic of final focuser once ready. I am a retired USAF electronics engineer, and might even do much of the construction of the base with welded structural tubing, as, I do have a complete metal working shop besides my wood shop, here. One of the neat things about the square design is that the Share it with us! I You can easily, and economically (10$) build a Crayford Helical Focuser like the one pictured above in one evening with simple tools. once. (The 8 inches from the center of the secondary to the field stop in the focuser is the same 8 inches from the center of the focuser to the top of the tube.) the drive shaft close against the drawtube. Thin 1/16 Kydex plastic should be cut to length to line the inside of the cage as a baffle to block outside light. Built one of these http://emediadesigns.com/focuser/ working really well only cost less than 40.00. I decided that my best option was to scale up their 8 inch design for a 12.5 inch scope and sacrifice the portability and easier storage of a truss scope for something that I felt confident in building myself. I carefully cut exactly through the center of each side bearing circle to make my semicircles. Edited by sunrag, 28 May 2020 - 10:44 PM. Just drill holes in both ends and mount the lenses. All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . The lumber yard also gave me a lower price than I expected. Some quick tips to note if you are making a homemade telescope are: 1. Keeping with the 'simple ' part of your request, here is a helical 2"/1.25" focuser made from std plumbing parts. I This one is based on the DRV8825 driver chip and a NEMA-17 stepper motor. forward and back along with the drawtube when you focus, and you'll get If you're not familiar with Arduino, watch some tutorial videos. The focal length of the mirror is 61 inches. It has become an indispensable piece of equipment for me that so beats hacking and filing PVC pipes etc. Dobsonian telescopes are popular with amateur telescope makers for their ease of design and construction, portability, and their use of large optical mirrors. The wide square footprint would make it pretty stable when mounted to Before attaching the sides and front to the bottom with wood screws, I wanted to make sure those screws would not interfere with the Ebony Star ring that would be attached to the rocker bottom. I sourced my own Stepper motor and 1:150 reduction gearbox from RS, who are just up the road. Other supplies that I bought for this project include wood, various bits of hardware, stain and finishing supplies, and a circle cutting jig for a router. Focuser minimum height is 50 mm and maximum a little over 90 mm so it is good overall. You need some purple bits by cranking This motor is available on Amazon. Along with some silver bits Once you get it working, there's some calibration you need to do. An electronic focuser, which moves the focus knob through a combination of hardware and software, solves this problem. I got no response to phone calls or emails after another week, and decided to wait until the primary would be finished in another two weeks. Interfaced with a computer, so the computer can make the decisions about where the best focus is. Ask Question Step 5: Stepper Motor Choice #2 - NEMA-17 Geared Stepper Motor If your optical train is heavy and the focuser has to bear it (see above) then this motor may be a better choice. My DIY Motorized Telescope Focuser - YouTube I use a 3D printer and an old gear motor to create an electronic telescope focuser.This is my first attempt at voiceover, I'm using a headset. . There are some test sketches in the "Tests" folder, start with those. To glue the side bearings and rocker sides to full thickness, I covered a side with wood glue, then carefully lined up the pieces and put two small nails into the pieces to hold them in place. Or rather, I hated it. like, you can have as much focuser travel as you want no matter how In amateur astrophotography, we run our telescopes overnight. adapter set screws to slide into. The next day, I called back to ask their opinion about the kind of spider and secondary holder to order. This software creates a model of your telescope by measuring out of focus star sizes at various points. To place the primary mirror, I installed the secondary and installed the primary in the mirror cell. This is the kind of simple off the shelf design I was looking for. This proved fatal for the stepper motor! This allows for a small clearance between the outside of the tube and the inside of the tube box (14 3/8). Contact cement is permanent, so the only solution would be to replace the tube! You simply glue or screw the 'nut' part to your scope OTA, and thread the tube part in/out to focus. Given any mirror measurements, PLOP will provide the ideal support layout and how much distortion to expect for any number of flotation points. Whether you need a basic rack-and-pinion telescope focuser for your homemade telescope project or a premium Crayford-type model with dual-speed focusing as a performance upgrade, you have come to the right place. Gift the gift of Make: Magazine this holiday season! If you are (for example) doing a focuser for a catadioptric telescope like a Celestron C-8 or similar, the focus knob has no load on it so this smaller, lighter motor will do the trick. I drilled the holes in the center of the ground board and rocker bottom using a 9/16 bit, thinking that I needed the extra 1/16 so that the spacer could move. the side of a rigid secondary cage. $299.99 More About Telescope Focusers Step 4Attaching the Side Bearings and assembling the Rocker. It is not very powerful, it will not supply enough torque if you put any load on it or have a heavy optical train (like I do) and the focuser has to "pull" it upward when the telescope is vertical. While I will freely admit that most astro-photography is WAY beyond me, you certainly do NOT need a $3200 camera to do so. This design could be adapted to practically any telescope or focuser, so I've kept my outline on the project brief. I would love to see your build when you are finished with it . This is where you will use screws to strongly attach the focuser onto the tube. I found a used 16 primary on eBay. This is the upper tube that contains the flat secondary mirror, Telrad finder, and focuser. spambots that search the internet for addresses to send junk mail to.) Two inch internal diameter drawtube. However more than the focuser, I liked your scope. Your design is simple and nice. Move the jigs until you can comfortably place a variety of eyepieces in the focuser and get a sharp image, then carefully measure the separation distances. 1" Rack & Pinion Focuser. At their suggestion, I also ordered a 2.6 inch secondary mirror. I could not find a spacer to fit my 9/16 hole, so I bought the 11/16 spacer (1 1/8 long because that's what the store had) and a bit of the same size. Again from the main FILES page, go to "ASCOM DRIVERS" and download everything. 7 years ago If you're going for simple, have you considered a helical focuser? The mount and tripod are pretty much useless for astrophotography. With an outer diameter of 14 3/16, I cut the Tube Box sides 15 5/8 and 14 5/8slightly less than my extra inch extra on each side. The project creator Robert Brown made a good video on testing the board. I even began taking careful notes about needed supplies and plans for each piece of the truss tube scope. The little app is simple and works great. the bearings, totally eliminating any flex. but try for a snug fit if you can. On the cutting diagram, you can see that the side bearings were cut 26 inches long. Having an RS trade counter 2 miles away is such a luxury! Thanks Bob. I had considered a Moonlite or Featherlite focuser, but I knew from my experience with my 6 inch scope that I wanted a 2 speed focuser, and the price tag of their 2 speed focusers scared me away. I only use the OTA. Low, or Zero slop when changing direction. var pageTracker = _gat._getTracker("UA-1008534-4"); and an eyepiece. PVC pipe makes great drawtubes. You can view and download the full file here. The focuser is the part of the telescope that holds the eyepiece or camera, and by moving in or out, closer or farther from the . In addition, we use third-party cookies to help us analyze and understand usage. Please explain, in detail, how you attached your tube to the very unique drive system of an XT12G mount. Sew the seam, and sew an elastic cord into the top to secure it to the secondary cage. Crayford-style design with four bearings and one driveshaft. I then temporarily installed the secondary mirror so that I could measure the approximate distance to the center of the secondary in order to locate the holes for the focuser. After cutting the circles for the side bearings, I set up the jig to cut the curved edges of the rocker sides. The mirror box encloses the mirror cell and allows the entire telescope to rotate vertically. The hole did need to be enlarged slightly by moving the bit within the hole , but in the end, the fit seems right. I then ran a bead of glue on the mark, and after it dried I cut out the nylon up to the glue. needle to be just a little too flexible for the weight of a diagonal and The hole is made slightly larger than the shaft, this is normal. I did not own all of the tools that I needed for this project, particularly a table saw and router, so I did a lot of work while visiting my Dad. It is size 1.25 inch with a clear inside dia-meter. I had nearly completed the base and put things together for the first time. I called to express my concern and was told that it had all been packaged a few weeks ago and that it should have been sent. large in diameter (1.6") so that adds to the fine-ness of the focus Here we see the following components installed: Notice we are NOT populating the parts of the board intended for Wifi or BLED. 100A81BF-2145-44D5-BC76-66DBF43BAD58.jpeg. that is a great website that guy has some fantastic photos. Both cameras have fairly small megapixels by todays' standards, and are certainly obsolete, but do the job extremely well! It's easy to shim it to I had talked with their owner about mirrors and mirror cells once, and I was very impressed by his knowledge of telescope building. Parts List (the full story of acquiring the parts), The primary, secondary, spider and secondary holderDiscovery Optics. Here are a few photos of the "bracket", which is a simple 3D printed plate that mounts to the telescope's focuser ring, and serves as a mount for the stepper motor. I brought a saw with me so that I cut it in half to fit in my minivan. on Step 5. I installed the spider first, about one inch down from the end of the square end of the tube. The dimensions of the Tube Box Sides are based on the outer diameter of my tube14 3/16. surfaces to put the bearings in and a vee at the bottom that would hold The sides were attached with wood glue and clamps with a few small brads to hold everything in place. Primary telescope mirror aftermarket, homemade, or custom-made. I have built a homemade electric focuser for my Celestron 8SE using a radio control hobby servo and some spare parts. One of the companies I had considered as a supplier for the primary mirror was Anttler's Optical. The extra force will also I also wanted to strengthen and protect the cardboard tube. . I also doubled the thickness of the rocker sides (not the front wall) to provide better support for the heavier tube. I had some carboy caps that make good knobs. Also no obvious diffraction spikes in the m31 photo. I want to put my 12.5 mirror in a collapsible structure so I can haul it easy, Say a truss tube design, 7 years ago