ScopeStuff is awesome!! The arc at the top of the sides needed to have a radius 1/8 inch larger than that of the side bearings to account for the thickness of the teflon pads that would fit between. Install on Windows 10, this part is pretty straightforward. A week later the cell arrived (on schedule) from University Optics. 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. Gift the gift of Make: Magazine this holiday season! Most of these have one or two set screws. accessible by all ages and skill ranges. The focuser is very smooth. Your astrophotographer friend may have included his own images from his setup. Crayford-style design with four bearings and one driveshaft. A i am not trying to win this contest with photos. This is not recommended for shared computers. 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 The telescopes size is classified by the size of its mirror. stronger, but would give me a coarser focus action because of their I then attached the Ebony Star ring using contact cement. You need a drawtube of course. Here is a link to the main FILES area on Robert Brown's site. The ARtemis module came in a kit form actually just two circuit boards one of which I had to source the parts, build and box myself. I did not wrap the tube until I had completed the base. This cost around $100 to build and all of the components came from Jaycar, except the brackets which were made with 1.2mm sheet metal. Unfortunately I don't have a 3d printer. Pierre Lemay, thanks for sharing your simple and incredible design. The secondary holder is adjustable, so I could didn't have to get the location perfect. I was concerned that it would be difficult to find, but I was able to order it from a local woodworking shop. Homemade astronomy. During assembly, youll attach the trusses to the mirror box, then sit the secondary cage on top and bolt everything in place. help eliminate slippage when the focuser is pointed straight upward. You will need to order one sized for your telescope's focuser shaft size. 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. The sides were attached with wood glue and clamps with a few small brads to hold everything in place. Over how many nights did this photography session take place? This Instructable describe the planning, design, and parts of the scope, as well as the process of building The scope. This extra space would allow the tube to be repositioned within the tube box to rotate the eyepiece or balance the tube. A 6 in primary mirror does not have enough weight to make the dob stable. The silly colours are mainly due to me experimenting with various clothes dyes in the anodising. 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. Interfaced with a computer, so the computer can make the decisions about where the best focus is. An Altitude Azimuth mount would also require a field rotator.There's no way these were taken with an Orion GoTo Mount. Attach the eye piece to another cardboard piece and pass it through the hole from the inside of the tube. The belt and pulleys are off-the-shelf items available on Amazon. The cage should be a hollow cylinder about wider than the mirror, with the focuser mounted directly facing the secondary mirror. A celebration of the Maker Movement, a family-friendly showcase of invention and creativity that gathers It is used to setup water outlet from overhead water tanks. Share it with us! Motion is very smooth. That is dirt cheap compared to the cost of commercially available focusers, which can top $1000 and are much heavier than what we will build. 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. When I ordered the cell, I paid through paypal, which immediately deducts money from my checking account. How to build a 12.5 inch closed tube Dobsonian telescope. Finally, I glued a strip of Ebony Star laminante to the curves edge of each side bearing using contact cement, using a flush edge bit on a router to bring the edge of the laminate even with the edge of the wood after the cement had set. The hole is made slightly larger than the shaft, this is normal. These will be stored in your browser only with your consent and you have the option to opt-out. the interior diameter is just a nudge over 2". 8 years ago 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 shroud made from two 22 inch tall containers came out short, so I had to add an eleven inch strip of nylon. The original Crayford Focuser is on display there. The length of the Rocker Front also had to be changed so that the outside edge of the Side Bearings matched the outside edge of the Rocker Sides precisely. I have not yet figured out a better way to hold the tube. a try. Thanks for the great comment. 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. Nice one. 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. 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. Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. I had chosen a boxy, rigid design for the binocular scope, so Or rather, I hated it. The last chapter of the book describes a plan for an 8 inch sonotube dob with a few design elements from their truss design, and, as I read that chapter, the simplicity of its construction was very appealing. Inside the OTA is a ring of tightly fitting flocking paper that prevents any light getting in around the drawtube. It took a lot longer than I expected to receive my mirror and other parts from Discovery. 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. 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. This software creates a model of your telescope by measuring out of focus star sizes at various points. Perfect for astrophotography or during high power planetary observation. Please re-enable javascript to access full functionality. Step 3The Side Bearings and Rocker Sides. you don't need to paint it (or worry about paint flaking off it). 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. This cost around $100 to build and all of the components came from. My other telescope is a Celestron NexStar C6E. Robert Brown did an excellent video on how to work out your stepper motor requirements. This simple homemade device will reduce star trails far better than if the camera was mounted on a tripod alone. narrow the frame. As I read the book I decided that I should build a 12.5 inch truss tube scope. I'm' glad I did, because I didn't like the first color that I had chosen. It's easy to shim it to (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.) Two different construction supply companies told me that sonotubes were not available with a 14 inch diameter, even by special order. 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. drneilmb, thanks for sharing the focuser design. I added three inches for a margin of error and in case I need to rebalance the tube in the future, making a distance of 25 inches from the balance point of the tube to the rocker bottom. When you're ready to go on to testing with the windows driver, you want "myFP2_DRV8825_312-1", open that folder. The motor is much lighter than the geared motor. 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. I've been using the above pair Total cost for supplies for this project: It took a lot longer than I expected to receive my mirror and other parts from Discovery. Next step, before my first acquisition of any parts, is to get with any amateur astronomers in Central Florida, so, wish me luck! You should watch (and bookmark) this video. I used a hole saw to cut a wooden plug to fit inside the I installed the spider first, about one inch down from the end of the square end of the tube. knob, and a drill press to make sure the hole for the knitting needle 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. I made this Crayford style focuser using plywood scraps and surplus bearings. My homemade motorized telescope focuser for Celestron C8. From everything I had read, I expected that getting a sonotube would be as easy as running to any hardware store and picking it up. Download the Gerber Files. After you've done that, put a couple of tiny pan-head screws : "http://www. After a dry fit of the rocker to make sure that the tube box with side bearings would fit well, I glued the rocker sides to the rocker front, holding them in place with small nails and clamping overnight. 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. Primary telescope mirror aftermarket, homemade, or custom-made. Drill a hole and attach the ball head using a shorter 1/4" 20 bolt. I have already seen some designs on CN, Stellafane and web but still checking if someone has recently made anything simpler. We use cookies to continuously improve our websites for you and optimize its design and customization. Headers for the LEDs, buzzer (2-pin) and temperature probe (3-pin). Earthbound1 likes this #2 dave brock Mercury-Atlas I don't have the skills to build a focuser using a. I wanted to wrap the tube in veneer because I had seen a homemade telescope on a website that used veneer and I liked the look. Because mirror flexure can distort an image, supporting the mirror properly involves building a flotation cell. Crayford focusers are considered superior to entry-level rack and pinion focusers, normally found in this type of device. Today I purchased what is called atank nipple in India. This is the first telescope that I have built. An electronic focuser, which moves the focus knob through a combination of hardware and software, solves this problem. Using a compass, I drew lines for the inside and outside of the Ebony Star ring on the top and bottom of the rocker bottom. spambots that search the internet for addresses to send junk mail to.) The premier publication of maker projects, skill-building tutorials, in-depth reviews, and inspirational stories, At this point, the scope was pretty much finished. 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. For about $3 we can buy a tank valve kit that has a threaded 2" i.d. I am well versed in technology, have all the tools necessary to build my own! on my binocular scope for quite a while now and really like them. For a while I decided that 10 inch would be the best size. So, for my telescope I used a 6mm to 5mm coupler available on Amazon. installations. Please feel free to email me at the address on the right. I welded mine from steel square tubing. Reply This is the kind of simple off the shelf design I was looking for. This is because my router bit was inch and the arc would be cut by the outside edge of the bit (where the circle had been cut by the inside edge.) Contact cement is permanent, so the only solution would be to replace the tube! I had designed the tube box so that there would be an extra inch around the tube. Funny how the bigger they are the better for dobs. We then spread contact cement over the remaining veneer and tube surface, waited for the glue to dry, and carefully rolled the tube over the veneer. curated by us, the people behind Make: and the Maker Faire. the drive shaft close against the drawtube. There are a number of technical reasons why these photographs could not have come from this Optical Tube Assembly. Along with some silver bits Not worth the effort, price is tooo high. Some of these are essential for the basic functionalities of our websites. The company has a reputation for excellent optics, and it was neither the most expensive, nor the least. When they arrived, they were beautifully and carefully packaged with the secondary already installed in its holder. Secondary mirror with spider holder Search on eBay for a matched set. 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. together tech enthusiasts, crafters, educators across the globe. It took about 3 weeks but, since Anttler's did not even reply to the Paypal dispute, I received a Paypal refund. The mirror itself must also be able to tilt in three dimensions in order to aim its light at the secondary mirror (a process called collimation). Drawing lines between opposite corners of the tube box sides allowed me to locate the center point on each side. Nice work and great instructable! I have several of the books on building a Dobsonian Telescope. Newton, and others including James Gregory and Laurent Cassegrain, believed that a reflecting telescope would not be affected by the chromatic aberration that affected . The hole did need to be enlarged slightly by moving the bit within the hole , but in the end, the fit seems right. I pointed it at distant trees and had no problem bringing the image into focus with all of my eyepieces. I did not glue the bearings to the tube box in case I needed to adjust the position later. The current needs to be adjusted on the DRV8825. Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. The specific hardware used for this is described on the Building page. The Crayford focuser is a simplified focusing mechanism for amateur astronomical telescopes. } 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. While a sling or whiffletree provide the best edge support, a two-point edge support is much easier to construct. In the "ARDUINO FIRMWARE" folder, in it you will find a ZIP file "myFP2-Firmware 312-1.zip". Two inch internal diameter drawtube. I told them to take their time and get it right. If you found some good surplus lenses, you will have made a stunningly good objective for your scope. 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. These are mounted 120 degrees apart and use 4 inexpensive bearings to support the tube. an eyepiece. 7 years ago The mirror box encloses the mirror cell and allows the entire telescope to rotate vertically. Im quite happy with the result, and the view in its large mirror is phenomenal. ill ask him for a detailed list of what he used and when i get that ill post it here for you. But, like many of you I'm sure, the biggest reason I'm doing this is for the pure geeky fun of it! As it turned out, the mirror cell was too large to fit into my 14 inch sonotube. 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. Home centers and hardware stores did not carry large sizes. I didn't receive any confirmation email after a few days, so I tried to send them an email. Thanks Bob. In my case I decided to make a custom bracket. Robert is a super guy and more than willing to help those who choose to follow in his footsteps. The focuser shaft on the telescope is 13.1mm in diameter. 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. Helicals are adaptable to both refractors and reflectors, but do not "play nice" with zoom eyepieces because "zooming" becomes a two handed operation to avoid changing focus. The lumber yard also gave me a lower price than I expected. Then it was time to stain and finish. The focuser knob had two set screws. This motor is available on Amazon. 1N5408 3A Diode (you may need to make the pins smaller to fit through the holes in the board. Given any mirror measurements, PLOP will provide the ideal support layout and how much distortion to expect for any number of flotation points. Before I wrapped the tube (and before I discovered the problem with the primary placement) I determined the balance point on the tube. Topics such as Here is a simple 3D printed helical focuser that cost just a few cents (assuming you have a 3D printer). 10 years ago They suggested a construction supply place on the other side of the city that I had not called yet. The Focuser and other items: (Scope Stuff). We were careful to press out any bubbles as we went, but when the job was done we found that there were multiple bubbles in the veneer. I'd Keeping with the 'simple ' part of your request, here is a helical 2"/1.25" focuser made from std plumbing parts. Not sure how your toilets are built over there, but here they use what is called a tank flush valve. To get this arc, I actually moved the radius of the jig, At some point in the building process, my goal became to finish the scope by RocheStar Fest, an annual event of the. Here's my 8" f/6 travel scope with a 2" PVC draw tube and the helical Crayford focuser built right in the focuser board. See above, this motor does not produce a lot of torque, but you don't need much for this application since there is no 'load' on the focusing shaft. 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. A Pocket Sundial From a Broken Pocket Watch! Dobsonians come in all shapes and sizes, from small 4-8 builds all the way up to massive 24-36 creations. This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". These have slop as you change direction, you can't do fine adjustments, they weigh a ton, and can flex alarmingly over time. Sh2-169 and Sh2-168, IC5146 Cocoon Nebula, Caldwell 19, Sh 2-125. Helical is one of the option i am considering. 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 . wobbly knob still works, and adds character. The blue pieces of the rocker box and ground board are arranged as in the diagrams in (figure 2). on Introduction. I carefully cut exactly through the center of each side bearing circle to make my semicircles. One of the neat things about the square design is that the with a genuine question or comment about the design. But -- you have to be careful that the mechanism is true and the motor does not have a load on it at any time, otherwise it will 'stall' and stop moving. Using a compass I drew circles on the top and bottom of the ground board to mark the inside and outside of the teflon ring on the bottom of the rocker bottom. A bit of a monster! Edited by sunrag, 28 May 2020 - 10:44 PM. Many sources point out that 10 inches is a kind of sweet spot in the balance between power and portability. After the second call, I received a response that it would be ready at the end of the following week. Able to make myself using my own humble tools (or toys as the pros will call them!) focusers for that project. There are sub-folders for the different versions. (actually, it ended up a smidge more than 2 inches) Lighter than the existing focuser. I have built a homemade electric focuser for my Celestron 8SE using a radio control hobby servo and some spare parts. crafts, science & engineering, design, and technology. 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. Here we see the following components installed: Notice we are NOT populating the parts of the board intended for Wifi or BLED. on Step 1, Richards in our local astronomy club. Focuser (GSO 2 speed low profile Crayford): $139 Ebony star strips: 2 @ $10 Ebony star ring: $59 Teflon strip: $11 Telrad base: $10 Baltic Birch " sheet (60X60): $42 Baltic Birch 5/8" sheet (60X60): $48 Circle cutting jig: $30 Birch Veneer (4X8 piece): $65 Hardware, stain, other supplies: $80 Total cost for supplies for this project: $1700 (I didn't have the primary mirror yet). Best Wishes, Reply The box should be deep enough to allow the mirror box to swing all the way down. - Bill. Once built, line the undersides of the arms with textured ABS plastic as a bearing surface. I was still doing some construction on the morning of the event, but I succeeded in making first light on that clear, dark night in late July. think that design would be rigid enough under the weight of a diagonal My newtonian telescope, like most others, came fitted with a nasty rack and pinion focuser. My wife helped me by moving the mirror into and out of the tube around the marked spot while I stood at the eyepiece trying to bring some distant trees into focus. The diameter of the focuser is usually indicated in inches. 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 wanted to finish that instructable before the contest ended but was too late :-). Place the focuser, draw the position of the screws with a pencil and remove the focuser. To make the hole for the focuser, I used the focuser tube to mark a circle in the shroud. This means I can use FocusMax to do the focusing. In scaling up the K/B 8 inch design, I made a few changes that, I hope, will improve the design for 12.5 inch aperture. telescope page, I wasn't really eager to buy two commercial Crayford 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. I did find, though, that the 3D printed gear would slip on the shaft, so it needed a set screw. focuser. Another vote for Pierre's helical Crayford design. A couple setscrews and you're up & running with an off the shelf solution. I did run into a small problem with the focuser. too far. 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. During on-site assembly, attach each truss to its mounting T-nut using a bolt with a thumbscrew knob. I only use the OTA. So, am curious to see what others have designed and built and proud to show off here on the homage to Crayford thread. 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. CNC files (optional) Download the Sketchup files. both sides. Cost is $25 - $30, and you will have 5 PCBs in about a week. There are some test sketches in the "Tests" folder, start with those. 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. The next day my wife called me at work to tell me a box had arrived with telescope stuff. Step 4Attaching the Side Bearings and assembling the Rocker. small, it's surprisingly rigid. And a couple of upright bearing blocks. Overall, I'm very happy with the outcome of this project - focusing is now a joy. If you're not using heavy eyepieces, you probably don't need Let me see if I am able to collect all the parts needed. This arrangement turns 100% true, no wobble. until a 2" eyepiece or 1.25" adapter is snug. I built mine entirely from CNC-cut plywood, and fastened it together with 2 bolts. Now attach the screw eyes and the rubber band on the side of the board. DIY Truss Dob input: How to design truss? The project took several months off and on to complete, although a skilled Maker could put a similar one together in a few weeks. Crayford-style design with four bearings and one driveshaft.
What Channel Is Sec Network On Cox New Orleans, Tolerable Limits Of Transverse Chromatic Aberration, Accident On Weber Road Today 2021, Articles H