a try. I only use the OTA. In my case I decided to make a custom bracket. The 2-1.25" adapter is a sink drain slip fitting in 1-1/4" size that slips into the large tube for 1.25 EP's. A Beginner's Guide to Collimation - Gary Seronik Another vote for Pierre's helical Crayford design. My guess is that photo was taken with a refractor. Thanks Bob. Accordingly, with 1.25 focuser, you can use 1.25 eyepieces, with 2 focuser - both 2 eyepieces and 1.25 (through a special . It uses a primary mirror to capture and reflect light, a secondary mirror to direct light into an eyepiece, and a focuser to make fine adjustments for viewing. The secondary holder is adjustable, so I could didn't have to get the location perfect. Upload that main sketch to the Nano. flexing. Once built, line the undersides of the arms with textured ABS plastic as a bearing surface. Part numbers 351-4574 and 336-422. The 48 inch width of the veneer was close enough to the diameter of the tube that I used it as is. 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. needle so the knitting needle will be snug against the drawtube without Share it with us! the side of a rigid secondary cage. You simply glue or screw the 'nut' part to your scope OTA, and thread the tube part in/out to focus. I will get good 30-40 mm focusing range. This means you lose much of the night's images. Tom's Homemade Telescope Page - 14 inch dob - Google Im sorry to hear you couldn't make the contest. I'd This motor is available on Amazon. Your astrophotographer friend may have included his own images from his setup. I called to express my concern and was told that it had all been packaged a few weeks ago and that it, For complete instructions on building a telescope such as this one, I strongly recommend buying a copy of, After cutting the circles for the side bearings, I set up the jig to cut the curved edges of the rocker sides. 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. This is not recommended for shared computers. 7 years ago Just as it was about to come into focus, the focuser bottomed out. This motor has a larger shaft diameter (8mm) and is quite a bit heavier overall than the direct drive motor, mainly because of the gearbox. Telescope Electronic Focuser : 16 Steps (with Pictures) - Instructables When I ordered the cell, I paid through paypal, which immediately deducts money from my checking account. If you're not using heavy eyepieces, you probably don't need The dimensions of the Tube Box Sides are based on the outer diameter of my tube14 3/16. In my build, the cage was cut on a CNC router from plywood, with threaded T-nuts added to support a truss assembly. As I mentioned on my binocular 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. This will determine the size of the coupler you will use to connect the stepper motor. I marked the expected position of the secondary by measuring 61 inches down from the end of the tube. You will need to order one sized for your telescope's focuser shaft size. This allowed me to cut perfect identical circles. I also wanted to strengthen and protect the cardboard tube. The bearings only need to be I will post the pic of final focuser once ready. 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. DIY Remote Telescope Focuser - YouTube I don't have the skills to build a focuser using a. I feel it is a wonderful thing to free oneself from the "store-bought" world, as Tombaugh did, and to use your imagination and skills to develop your own, personal way of viewing the sky. 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. I had nearly completed the base and put things together for the first time. Thicker walls also required thicker side bearings so that the outside of the bearings would line up with the outside of the rocker sides. Subscribe to the premier DIY magazine today, Community access, print, and digital Magazine, and more. 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. Gift the gift of Make: Magazine this holiday season! I was annoyed to have made the mistake, but very glad that I checked the position on stars before wrapping the tube in veneer. Orion Dynamo Mini for powering a Nexstar 6SE? In my build, the minimum eyepiece-to-secondary mirror distance (13) plus the primary-to-secondary mirror distance (57) equals the focal length of 71, which is roughly 4.5 times the width of the 16 mirror. 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. on Introduction. Slide the eyepiece into the focuser and try it out. It doesn't. A tilted focuser will have no effect on the image quality. The focuser 'knob' on the Celestron is just a rubber sleeve that usually pulls off easily. Let me see if I can get similar plumbing parts here. Find a special something for the makers in your 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. After another 3 weeks, I was concerned that I had not received the mirror. When the skies were dark enough for observing I found that the scope moves easily into position and holds that position well. Two inch internal diameter drawtube. After going over the surfaces with a tack cloth to pick up the saw dust, I applied the stain and went over it with cheese cloth rags for an even finish. Rather than use a sheet of plastic Kydex to finish the tube, as recommended in K/B, I ordered a sheet of birch veneer. off the bearings. The curved sides of the Side Bearings are also covered with strips of Ebony Star that glide on the teflon pads on the curved edges of the Rocker Sides (figure 3). The lumber yard also gave me a lower price than I expected. The rocker arms must also have guides to keep it on the track; flat metal 12 braces lined with ABS plastic work nicely. How to make diy focuser pvc - YouTube The focuser shaft on the telescope is 13.1mm in diameter. A Pocket Sundial From a Broken Pocket Watch! You can easily, and economically (10$) build a Crayford Helical Focuser like the one pictured above in one evening with simple tools. Not sure how your toilets are built over there, but here they use what is called a tank flush valve. tube and nut that fits the outside threads. 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 tube is cardboard as well, you can also get a quality mirror at telescope.com for much cheaper. needle adds no friction that I can feel to the focus action. Build a Backyard Dobsonian Telescope - Make: DIY Projects and Ideas for I have already seen some designs on CN, Stellafane and web but still checking if someone has recently made anything simpler. I am using scrap upvc pipe material. 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. Attach the ball head to the top board. The part is very strong! Step 3The Side Bearings and Rocker Sides. 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. 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 didn't have the primary mirror yet). I then ran a bead of glue on the mark, and after it dried I cut out the nylon up to the glue. There are a number of technical reasons why these photographs could not have come from this Optical Tube Assembly. I welded mine from steel square tubing. Here we see the following components installed: Notice we are NOT populating the parts of the board intended for Wifi or BLED. I decided to order a mirror cell from them because the owner had talked about a new cell he was excited about. Several of my Recent Images have been focused with this system. I pointed it at distant trees and had no problem bringing the image into focus with all of my eyepieces. I attached them with very small brads, countersinking the brads. The extra force will also The wood would cost the same, as would pretty much everything except the mirror, so why not spend a little more on the mirror and go BIG. The premier publication of maker projects, skill-building tutorials, in-depth reviews, and inspirational stories, His project is very well documented. and hope it doesn't fall off on Step 5. 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. So, am curious to see what others have designed and built and proud to show off here on the homage to Crayford thread. Tom's Homemade Telescope Page - Udder Nonsense - Google I ended up modifying it a bit after printing. on my binocular scope for quite a while now and really like them. The Focuser and other items: (Scope Stuff). Easy DIY motorized battery free telescope focuser - YouTube Star Adventurer Pro Pack Counter Weight Bar Thumb Screw Upgrade. microcontrollers including Arduino and Raspberry Pi, Drones and 3D Printing, and more. My other telescope is a Celestron NexStar C6E. I had already made a lightweight focuser for Fast forward a few months to the next time I had the tube outside. Able to shift heavy loads of kit ie over 1000g. I found a used 16 primary on eBay. 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. After the second call, I received a response that it would be ready at the end of the following week. My newtonian telescope, like most others, came fitted with a nasty rack and pinion focuser. During assembly, youll attach the trusses to the mirror box, then sit the secondary cage on top and bolt everything in place. 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. This NEMA-17 direct drive stepper motor is available from Adafruit and many other sellers. how much travel you actually need, you can cut the tube off so none of 11 years ago The glue should keep the nylon from fraying. you could probably space the bearings 3/4" apart instead of 1" and mount Please re-enable javascript to access full functionality. Headers for the LEDs, buzzer (2-pin) and temperature probe (3-pin). To get a slide-fit in a 3D printed part, you normally make the hole 0.5mm larger than the shaft. 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. But, especially on cold evenings, the focus may go out in the middle of the night. 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. 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. This is the first telescope that I have built. The email bounced back to me. Meade Zero Image-Shift Electronic Micro-Focuser This high precision focuser allows you to obtain an extremely accurate image focus. Because thebasic movement and optics requirements are relatively simple, much of the design is left to the builder. (actually, it ended up a smidge more than 2 inches). 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. One 6in dob I made was a complete failure. Attach the eye piece to another cardboard piece and pass it through the hole from the inside of the tube. This is the upper tube that contains the flat secondary mirror, Telrad finder, and focuser. This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". Rock on! Then it was time to stain and finish. on Introduction, Very nice build nikon20. I used the "LEDandBuzzer" and "TestStepsDRV8825" tests. You really need a step ladder even for my 10" when pointed overhead. You will need to remove the regular focus knob on your telescope's focuser. 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. Also no obvious diffraction spikes in the m31 photo. 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. I redrilled the holes for the mirror cell and got ready to wrap it. Newton, and others including James Gregory and Laurent Cassegrain, believed that a reflecting telescope would not be affected by the chromatic aberration that affected . I tried to call, but the voice mail had a recording stating that the customer was unable to receive messages. At their suggestion, I also ordered a 2.6 inch secondary mirror. The mount and tripod are pretty much useless for astrophotography. 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 am not trying to win this contest with photos. If you enter it in the next contest please let me know and i will make sure to vote for you. They suggested a construction supply place on the other side of the city that I had not called yet. Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. Instead of the rack and pinion, they have a smooth spring-loaded shaft which holds the focus tube against four opposing bearing surfaces, and controls its movement. Thicker knitting needles would be even As the telescope tilts toward the horizon, the mirror must be supported on its edge. try { Just drill holes in both ends and mount the lenses. It just initiatives for the next generation of makers. I decided to order an aluminum mirror cell from University Optics instead so that the mirror could be supported at 9 different points. The diameter of the focuser is usually indicated in inches. We use cookies to continuously improve our websites for you and optimize its design and customization. It's easy to shim it to exactly 2" with adhesive labels placed one at a time inside the tube until a 2" eyepiece or 1.25" adapter is snug. 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.) So, as they say, "back to the drawing board". Next step, before my first acquisition of any parts, is to get with any amateur astronomers in Central Florida, so, wish me luck! 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. I even began taking careful notes about needed supplies and plans for each piece of the truss tube scope. small, it's surprisingly rigid. Above youll find an interactive 3D rendering of the Sketchup file I used to design and cut all of the parts for my telescope. You can see that my Moonlite focuser was slightly larger than the sides of the tube. 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. With Simple | Space The Dob is really a great design. To view, go here: http://emediadesigns.com/focuser/ Nice one. 5 weeks after I had ordered the mirror, I called to ask about its status. Make the drawtube longer than you think you'll need, just in think that design would be rigid enough under the weight of a diagonal Very simple and portable. 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. 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. 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. #@$%^#@!!!!! Cost is $25 - $30, and you will have 5 PCBs in about a week. he might just have a $3200 camera, they aren't very hard to come by. The motor is much lighter than the geared motor. 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. Stellafane The Focuser Your choice here will be recorded for all Make.co Websites. My plan for wrapping the tube seemed good, but I am not too pleased with the final result. I applied contact cement to the first inch of the veneer and the mating inch of the tube. 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. If you connect the 12V power with the barrel connector (right side of photo), the Nano should light up without the USB connection. I do it with aluminium alloy, aluminium tube and nice work. I had talked with their owner about mirrors and mirror cells once, and I was very impressed by his knowledge of telescope building. Unfortunately I don't have a 3d printer. As I continued to read, however, I was struck by the many complications of the design and, frankly, how many ways I could screw it up. curated by us, the people behind Make: and the Maker Faire. 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. Remember: It is the quality and SIZE of the capture chip, NOT the megapixels that determines quality. A homemade 16 inch dob lightweight telescope, DS-4 - XMission If not, you may need to design and print your own bracket(s), gears, and so on. You will look through these as you rotate the wheel. 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. Built one of these http://emediadesigns.com/focuser/ working really well only cost less than 40.00. I told them I was on my way. 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. I'll use an aluminum tube for the finished draw tube but for now the plastic tube . Finally, I attached Keepers to the sides of the rocker at the bottom of the arcs using screws and glue. spambots that search the internet for addresses to send junk mail to.) 5 weeks after I had ordered the mirror, I called to ask about its status. I will have a lot of fun building my homemade 12.5 inch Dobsonian Telescope!!! While I will freely admit that most astro-photography is WAY beyond me, you certainly do NOT need a $3200 camera to do so. 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 carefully cut exactly through the center of each side bearing circle to make my semicircles. It interfaces to the computer via USB and comes with an ASCOM driver. It had been described by many as the most important recent volume for anyone planning to build a dob, and I have to agree. Some of these are essential for the basic functionalities of our websites. I only do functional. 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. Deep space photos like these require HOURS of exposure for each one. I had to take apart the focuser in order to get my bolts in place. Both cameras have fairly small megapixels by todays' standards, and are certainly obsolete, but do the job extremely well! I am thankful to enjoy the inspiration, and the details, that you provide, as I will soon be constructing a Dobsonian Telescope. The company has a reputation for excellent optics, and it was neither the most expensive, nor the least. The next day, I centered the rocker on the rocker bottom (which had been cut using the same method as the side bearing circles), drawing perpendicular lines through the center of the rocker bottom to use as a guide, and tracing the position on the rocker bottom. One of the neat things about the square design is that the So, for my telescope I used a 6mm to 5mm coupler available on Amazon. How To Build A Dobsonian Telescope [Guide 2022] - DopeGuides Bill, Impressive work and great idea about LSDF focuser. I had designed the tube box so that there would be an extra inch around the tube. Here is what I was working on but looks like I need a better design. Once your telescope is assembled, drape black woven velveteen around the truss assembly, clipping it with safety pins. Best Wishes, Reply See the images how I plan to assemble it. 3D Printed Futuristic Space Age Wall Clock, http://www.cloudynights.com/ubbthreads/showthreaded.php?Cat=0&Number=4721255. I did not wrap the tube until I had completed the base. 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. For about $3 we can buy a tank valve kit that has a threaded 2" i.d. Made of plywood, the rocker box supports the mirror box on 1 teflon pads, allowing it to rotate vertically. This allows for a small clearance between the outside of the tube and the inside of the tube box (14 3/8). a 3/4" thickness. 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). Pierre's Helical Crayford gets my vote hands-down for elegant simplicity. There are some test sketches in the "Tests" folder, start with those. This scope was originally made as a travel scope using an eight inch mirror that I ground and polished at the St Pete Astronomy Clubs Mirror Lab. An electronic focuser, which moves the focus knob through a combination of hardware and software, solves this problem. On that noteWARNING:do not look directly into the sun and never point a telescope into the sun without proper filtration you can damage your telescope and burn your retinas and possibly go blind i am not a astrophotographer so i cant comment on the quality of the pictures since there is so much doubt on the photos i will gladly take them down. The mirror cell: University Optics (eventually). Reply I did find, though, that the 3D printed gear would slip on the shaft, so it needed a set screw. It is used to setup water outlet from overhead water tanks. If you're going for simple, have you considered a helical focuser? This combination has proved to be effective for all positions except when the tube is pointed directly up. Their step by step instructions were invaluable to me as I built this scope. 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. DO NOT drill out the holes in the board! Telescope Focusers | Orion Telescopes: Shop Dobsonian telescopes are popular with amateur telescope makers for their ease of design and construction, portability, and their use of large optical mirrors. NEMA-17 Stepper Motor - see below, there are two options. I did run into a small problem with the focuser. on Introduction.
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