All Dobsonian telescope projects are unique buildshere are the notes from my latest version to help get you familiar with the process and determine how youll design yours.
Telescope Focusers | Orion Telescopes: Shop Several clamps were used to hold the pieces together overnight. You should now be able to drill the 4 holes at each corner. Please re-enable javascript to access full functionality. The mirror box encloses the mirror cell and allows the entire telescope to rotate vertically. However more than the focuser, I liked your scope. And the legs of the base should be as wide as possible to accommodate weight imbalance as the telescope is moved around, to avoid tipping. 1/4" x 20 bolt, and the nylon bolt end against the smooth knitting But I wanted a larger mirror, and, at that size, grinding my own was not an option. The project took several months off and on to complete, although a skilled Maker could put a similar one together in a few weeks. Make the drawtube longer than you think you'll need, just in Pierre's Helical Crayford gets my vote hands-down for elegant simplicity.
Wooden Telescope Part 2: Tube and Mount - Instructables I'd Because thebasic movement and optics requirements are relatively simple, much of the design is left to the builder. Share a cool tool or product with the community. Their step by step instructions were invaluable to me as I built this scope. Before I wrapped the tube (and before I discovered the problem with the primary placement) I determined the balance point on the tube. Two different construction supply companies told me that sonotubes were not available with a 14 inch diameter, even by special order. A few months later I ordered some other things from Scopestuff, including strips of Ebony Star laminate for the side bearings, a ring of Ebony Star for the rocker bottom, a strip of teflon to cut pieces for the ground board and side bearings, and a new base for my Telrad finder. I knew that I would be returning the mirror cell to them, but just for fun I decided to see how it would fit in the tube. So I was looking for a cheap, light-but-sturdy design for a Yet I was also becoming infected with aperture fever. This is the first telescope that I have built. 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. Picture of DS-4. You will need to order one sized for your telescope's focuser shaft size. To get this arc, I actually moved the radius of the jig in by 1/8 inch. These will be stored in your browser only with your consent and you have the option to opt-out. "https://ssl." You should watch (and bookmark) this video. Only problem is if I put a diagonal it wants to rotate the helical part. 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. 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. This proved fatal for the stepper motor! Perfect for visual observations with very heavy mirrors. 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. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. Since my focuser shaft is 6mm, I ordered the coupler shown here in the 6mm to 8mm version from Amazon. On the bottom of the Bottom board is a ring of Ebony Star laminate that glides over the three teflon pads located directly above the feet on the ground board. Several functions may not work. control. The version number "312" here may change if Robert posts new firmware. You will have to line up the diagonal and primary so that you see a centered image of the sonotube opening and the spyder in the eyepiece hole. The company has a reputation for excellent optics, and it was neither the most expensive, nor the least. I carefully cut exactly through the center of each side bearing circle to make my semicircles. Subscribe to the premier DIY magazine today, Community access, print, and digital Magazine, and more. widening the hole. I suppose that one could complete this project without these two tools, but it would be difficult to cut the pieces accurately enough for a good fit. These have slop as you change direction, you can't do fine adjustments, they weigh a ton, and can flex alarmingly over time. Very simple and portable. you could probably space the bearings 3/4" apart instead of 1" and mount Telescope Magazine. The 48 inch width of the veneer was close enough to the diameter of the tube that I used it as is. I had cut the 12 foot tube in half in order to get it home in the first place, and a 6 foot section was the right size to work with for my f/5 12.5 inch. } catch(err) {}, SH-232 Sharpless sh-232, sh-231, sh-233, sh-235, NGC2174 Monkey Head Nebula, Sharpless 252, Sh2-252, HDW3 Hartl-Dengel-Weinberger 3 PN G149.4-09.2, SH-198 Sharpless 198, Soul Nebula, IC1848, NGC281 IC11, Sharpless Sh2-184, Pacman Nebula, SH2-173 SH2-173 Phantom of the Opera LBN 593, SH2-168 Sharpless HII regions.
My DIY Motorized Telescope Focuser - YouTube Dobsonian telescopes are popular with amateur telescope makers for their ease of design and construction, portability, and their use of large optical mirrors. In order to check your measurements, you can construct jigs for your mirror cell and secondary cage, positioning them on a straight, adjustable track such as 2 planks of wood. 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. I wanted to finish that instructable before the contest ended but was too late :-). You will need to order one sized for your telescope's focuser shaft size. I installed the spider first, about one inch down from the end of the square end of the tube. Rock Paper Scissors Using Tinkercad Circuits and Arduino, Punchy the MECH & the Autonomous Fight Club, PCB (printed circuit board) - download the, DRV8825 - stepper motor driver chip/board - again, clones available on. Well, it sort of looks like a focuser.. See pictures below. The flat wants to be running parallel to the long axis of the tube. Total cost for supplies for this project: It took a lot longer than I expected to receive my mirror and other parts from Discovery. The rocker sides are each made of two identical pieces of inch plywood glued together, creating two sides one inch thick. I used a hole saw to cut a wooden plug to fit inside the I built mine entirely from CNC-cut plywood, and fastened it together with 2 bolts. I built a second set of electronics, and I had the NEMA 17 Direct Drive motor left over since it didn't work for my Orion ED80T-CF refractor. 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. While I applaud your building of a homemade Dob, (giving you the FULL benefit of the doubt here) your "friend" has provided photographs that make it look like you're trying to win by cheating. Once I decided to build a scope myself I had to decide on the aperture of the scope. I drilled holes for the screws that avoided the location of the ring, and attached the rocker bottom. Measure twice, drill try { I don't *do* pretty. This unit takes signals from your computer and drives the stepper motor on the focuser. The base and the rocker box in my telescope are secured with a skate bearing assembly but could be more simply attached with a bolt through the center. the drive shaft close against the drawtube.
Build a Backyard Dobsonian Telescope - Make: DIY Projects and Ideas for If not, you may need to design and print your own bracket(s), gears, and so on. I am working on a diy focuser design for my 6" F/8 telescope and asking suggestions for simple focuser. 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. Download and check them out, I just grabbed the first one and printed it. The Focuser and other items: (Scope Stuff). A free program that lights childrens creative fires and allows them to explore projects in areas such as arts &
They suggested a construction supply place on the other side of the city that I had not called yet. Secondary mirror with spider holder Search on eBay for a matched set. Using heavy grit sandpaper I brought back the surface of the keeper enough for the side bearings to fit inside the felt pads. After the pieces were glued together, I used a belt sander to smooth out any rough edges, being careful to keep both rocker sides and both side bearings exactly the same. This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". I decided to order a mirror cell from them because the owner had talked about a new cell he was excited about. I attached three feet equally spaced on top of the ring, and on the opposite side attached teflon pads 1 X 1 directly above the feet using very small brads and countersinking the brads below the surface of the teflon. Once the pieces were cut and I held them around the tube, I decided to cut them a bit smaller because the extra space was too much. both sides. Thanks Pinbout for sharing your design. It just The next day, I called back to ask their opinion about the kind of spider and secondary holder to order. the nylon screws going up from the bottom, but I found the knitting Your design is simple and nice. Start with the small components first. Thanks Peter. a "rubbery" feel. 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. Sew the seam, and sew an elastic cord into the top to secure it to the secondary cage. The project creator Robert Brown made a good video on testing the board. 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. With adapters for any Meade 1x200-ACF or LS model, and chord to plug into focuser port. I attached small felt pads to the inside of the keepers to protect the side bearings from scratches, but discovered that the side bearings would not fit because of the thickness of the pads. To interface with the computer, I have used the Artemis Focuser module from Steve, Arthur and Co. I bought a 4" PVC Sewer pipe cap, used a hole saw to cut a 2.25" hole then attached the helical thing to the PVC cap. I did not glue the bearings to the tube box in case I needed to adjust the position later. It took yet another call a week later for the items to actually be mailed. To test the concept I used a short piece of two inch PVC for the draw tube. Drawing lines between opposite corners of the tube box sides allowed me to locate the center point on each side. The plate has slotted screw holes for tensioning the 6mm belt. CNC files (optional) Download the Sketchup files. Install on Windows 10, this part is pretty straightforward. Pretty dry but important! But by this time I had thought about building my own scope for several weeks, and getting one off the shelf seemed pretty boring by comparison! 11 years ago My other telescope is a Celestron NexStar C6E. It was easy enough to drill a hole and tap threads for a I told them to take their time and get it right. I called in the order and explained that I would be using a mirror two inches thick. After another 3 weeks, I was concerned that I had not received the mirror. Then it was time to stain and finish. Next step, before my first acquisition of any parts, is to get with any amateur astronomers in Central Florida, so, wish me luck! Once your telescope is assembled, drape black woven velveteen around the truss assembly, clipping it with safety pins. larger diameter. I used the "LEDandBuzzer" and "TestStepsDRV8825" tests. Attach the eye piece to another cardboard piece and pass it through the hole from the inside of the tube. 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 wide square footprint would make it pretty stable when mounted to 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. scope, I only put knobs on the outsides. I also decided to make a separate mounting plate for the stepper motor, since I figured aligning the shafts precisely would be all but impossible. and an eyepiece. As the thread shows you could also build the dual speed version, all made of plywood, if you feel ready to tackle a slightly more complex project for a cost of about 5$ more. The blue pieces of the rocker box and ground board are arranged as in the diagrams in (figure 2). For a while I decided that 10 inch would be the best size. It's the same in form, but has a perfect, true 13.35mm hole. I ended up modifying it a bit after printing. They eyepiece height ended up being about 5'10" high at zenith. See the images how I plan to assemble it. How to build a 12.5 inch closed tube Dobsonian telescope. Not worth the effort, price is tooo high. You need a drawtube of course. Fairly easy to build and could be adapted to suit any SCT focuser. I have not yet figured out a better way to hold the tube. 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. This book describes in great detail the steps to build a large aperture truss tube dob, focusing on scopes with a 12.5 to 40 inch mirror. Next, attach the eyepiece and the focuser to the top part of the telescope tube. Measure the diameter of the exposed shaft. Download the Gerber Files.
A Homemade Crayford Focuser on Step 5. stronger, but would give me a coarser focus action because of their A Pocket Sundial From a Broken Pocket Watch! It interfaces to the computer via USB and comes with an ASCOM driver.
How to make a $30 DIY star tracker for astrophotography I even began taking careful notes about needed supplies and plans for each piece of the truss tube scope. The shroud made from two 22 inch tall containers came out short, so I had to add an eleven inch strip of nylon. Post 10 of the same LSDF focuser thread also links to Art Bianconi's archived 2008 original flush valve focuser posts. an inch or so apart, so the focuser body could be pretty low profile. I attached them with very small brads, countersinking the brads. Thanks Bob. var pageTracker = _gat._getTracker("UA-1008534-4"); i got a email that someone built a telescope close to mine that has seen the stuff in the photos here is a link to his site http://www.synapticsystems.com/sky/scopes/Dob.htmlif i seem a bit rude please forgive me i just spent 12hrs in a plane i have jetlag and im sitting in a airport.i would like to thank lvlasertech for keeping this instructable lively and informative. It wouldn't be a two-speed design, but if I used a thin enough corners of the squares provide nice nooks for the eyepiece and eyepiece This resulted in a gear that wasn't true and "wobbled" a bit. A celebration of the Maker Movement, a family-friendly showcase of invention and creativity that gathers
The drawings are only approximately to scale. And you can tell it's not a mosaic because the stars at the corners show coma/field curvature artifacts. This focuser (see pic at bottom) was motorised by me several years ago, but the motorised system didn't give me very fine control, and the motor running at fast speed tended to make the Artemis camera crash. Drill the holes for the knitting To hold the tube in place within the tube box, I used a combination of pieces of felt inside the box and wooden shims between the tube and the box. I decided to keep this tube for now and if I run into problems with it, I can replace it later. forces the knitting needle against the drawtube and the drawtube against Unfortunately I don't have a 3d printer. The holes in the main bracket the match the holes in the plate are oversize to allow for this alignment. 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. I read the entire thread and surely its going to help me building my focuser. I don't have the skills to build a focuser using a. I also have an extended photographic build diary of this telescope posted on Imgur. They use a simple plywood mirror cell, stating that for an 8 inch mirror this cell will be adequate. 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. 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. The hole did need to be enlarged slightly by moving the bit within the hole , but in the end, the fit seems right. Place the focuser, draw the position of the screws with a pencil and remove the focuser. The focal length of the mirror is 61 inches. And a couple of upright bearing blocks. A Save over 40% off the annual cover price for a full year (4 issues) of Make.
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