The holes in the main bracket the match the holes in the plate are oversize to allow for this alignment. Once you get it working, there's some calibration you need to do. 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. This simple homemade device will reduce star trails far better than if the camera was mounted on a tripod alone. A celebration of the Maker Movement, a family-friendly showcase of invention and creativity that gathers I don't have the skills to build a focuser using a. 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. Since my focuser shaft is 6mm, I ordered the coupler shown here in the 6mm to 8mm version from Amazon. until a 2" eyepiece or 1.25" adapter is snug. The focuser shaft on the telescope is 13.1mm in diameter. I installed the spider first, about one inch down from the end of the square end of the tube. The drawings are only approximately to scale. Electronics and software automate the process of taking pictures. Along with some silver bits But, especially on cold evenings, the focus may go out in the middle of the night. Un-real!!! Drawing lines between opposite corners of the tube box sides allowed me to locate the center point on each side. I would also like to know about how you can take such fantastic pictures without a field rotator and an autoguider system. A week later the cell arrived (on schedule) from University Optics. 3D Printed Futuristic Space Age Wall Clock, http://www.cloudynights.com/ubbthreads/showthreaded.php?Cat=0&Number=4721255. I carefully cut exactly through the center of each side bearing circle to make my semicircles. This allowed me to cut perfect identical circles. Stellafane The Focuser 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. Carve out a hole on the top part of the sonotube first. Dobsonians come in all shapes and sizes, from small 4-8 builds all the way up to massive 24-36 creations. Use the externalMirror Edge Support Calculatorto decide whether to use a two-point, four-point (whiffletree), or sling support. It So, as they say, "back to the drawing board". Slide the eyepiece into the focuser and try it out. Here's a detailed response from a thread at CloudyNights:http://www.cloudynights.com/ubbthreads/showthreaded.php?Cat=0&Number=4721255 "The image scale is wrong on the M31 image, fits too much of the galaxy in for even a 35mm chip. Well, it sort of looks like a focuser.. See pictures below. We use cookies to continuously improve our websites for you and optimize its design and customization. During on-site assembly, attach each truss to its mounting T-nut using a bolt with a thumbscrew knob. 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. I have seen some VERY impressive photos similar to those, taken with Nikon D700 and D300 cameras, with the proper filters- and mounts- on a quality scope. Orient this assembly to allow you to view an object on the far horizon. I am using scrap upvc pipe material. like, you can have as much focuser travel as you want no matter how the nylon screws going up from the bottom, but I found the knitting In the sub-folder "Cases" you will see many variants of the case for the DRV8825 based focusers. Once I had my design set, I was ready to buy the parts. Lining up this center point with the center of the top of the side bearing, I brought the corner of the side bearing up to the edge of the tube box and attached it with screws. once. I was concerned that it would be difficult to find, but I was able to order it from a local woodworking shop. Place the focuser, draw the position of the screws with a pencil and remove the focuser. I didn't receive any confirmation email after a few days, so I tried to send them an email. The shroud made from two 22 inch tall containers came out short, so I had to add an eleven inch strip of nylon. You will need to order one sized for your telescope's focuser shaft size. Finally it was etched in caustic soda, and anodised matt black. To cut the circles, I used a router with a straight cutting bit and a circle cutting jig. The rocker arms must also have guides to keep it on the track; flat metal 12 braces lined with ABS plastic work nicely. Only problem is if I put a diagonal it wants to rotate the helical part. I set things up in daylight and collimated the scope. 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. Picture of DS-4. Parts List (the full story of acquiring the parts), The primary, secondary, spider and secondary holderDiscovery Optics. Telescope Focusers | Orion Telescopes: Shop The core of the telescope, the steel mirror cell holds and adjusts the heavy, curved primary mirror. 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 have several of the books on building a Dobsonian Telescope. 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. It just My other telescope is a Celestron NexStar C6E. Pierre Lemay, thanks for sharing your simple and incredible design. I particularly like that the design can be integrated directly into the focuser board to make a very, very simple UTA. That's pretty much the focuser. 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. Sonotube (14 inch diameter, 12 feet long): $70, Focuser (GSO 2 speed low profile Crayford): $139, Total cost for supplies for this project: $1700. #2 knitting needle would be just about right. This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". You should watch (and bookmark) this video. If you're not using heavy eyepieces, you probably don't need 4 years ago The overall project is super cheap, we're building this thing for something like $50 in materials. Yet I was also becoming infected with aperture fever. Given that you can make the drawtube any length you Focusers of telescopes. Types, difference, specifications - Star Hunter Featured in the February, 2015 issue of Sky & 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. Building a Homemade Telescope Eyepiece - HubPages It has become an indispensable piece of equipment for me that so beats hacking and filing PVC pipes etc. My newtonian telescope, like most others, came fitted with a nasty rack and pinion focuser. I wasn't there so i can be 100% but i do not think my friend was lying to me and i believe the pictures are from my telescope my kids use it for stargazing a lot i have seen some deepspace but i use it mainly for sketching the moon and i like to view solar flares. Let me see if I am able to collect all the parts needed. 4 years ago A couple setscrews and you're up & running with an off the shelf solution. Here is what I was working on but looks like I need a better design. 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. Your astrophotographer friend may have included his own images from his setup. too far. Homemade astronomy. His passion is using CAD design and his homemade CNC router to bring large wood projects to life. 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. After the second call, I received a response that it would be ready at the end of the following week. 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 next day, I called back to ask their opinion about the kind of spider and secondary holder to order. 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. The mirror box encloses the mirror cell and allows the entire telescope to rotate vertically. by cranking A Pocket Sundial From a Broken Pocket Watch! Share a cool tool or product with the community. Showcasing amazing maker projects of 2022. 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. document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); The bigger upvc nut will be attached to focuser plate and longer threaded side will be used on it for the focusing. Be creative! flexing. 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. on Step 5. For a while I decided that 10 inch would be the best size. I had designed the tube box so that there would be an extra inch around the tube. It turned out that they had an incorrect zip code and the package was still waiting to be sent. Building Your Second Homemade Telescope - Part 1 - HubPages needle to be just a little too flexible for the weight of a diagonal and This combination has proved to be effective for all positions except when the tube is pointed directly up. They eyepiece height ended up being about 5'10" high at zenith. the side of a rigid secondary cage. The bearings only need to be Total cost for supplies for this project: It took a lot longer than I expected to receive my mirror and other parts from Discovery. Thicker knitting needles would be even But, like many of you I'm sure, the biggest reason I'm doing this is for the pure geeky fun of it! Like i said these are not my photos and i cannot coment on exactly how he set it up as i was not there all i can say is i saw the mount he used when he picked up the telescope. Homemade DIY focuser for telescope with computer control - NEUTRAL.org 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. Pretty dry but important! Please feel free to email me at the address on the right. The next day my wife called me at work to tell me a box had arrived with telescope stuff. The day I received the refund, I ordered a mirror cell from University Optics. It's easy to shim it to I decided to use baltic birch because it is recommended by Kriege and Berry as well as many online sources. haven't yet found any design elements that need improvement. This combination has the best resolution (steps/revolution), so I didn't see any reason to build anything else. On the cutting diagram, you can see that the side bearings were cut 26 inches long. . was straight so I wouldn't get a wobbly knob. both sides. and hope it doesn't fall off I decided to keep this tube for now and if I run into problems with it, I can replace it later. can't click on it or copy and paste it; it's a graphic file to thwart They suggested a construction supply place on the other side of the city that I had not called yet. Connect the Arduino USB cable and upload some test sketches. 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. 11 years ago One of the neat things about the square design is that the I told them to take their time and get it right. Many sources point out that 10 inches is a kind of sweet spot in the balance between power and portability. Before finishing the tube with a wrap of veneer, I wanted to make sure that the primary was in the correct position. 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. control. I told them I was on my way. 1" Rack & Pinion Focuser. 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. I decided to order a mirror cell from them because the owner had talked about a new cell he was excited about. The focal length of the mirror is 61 inches. on Step 1, interesting build, its just like my old Odyssey brand scope from the mid 1990's. Ideally, the spacer would be 1 inch long and have a smaller diameter, but I didn't get this one right the first time. Homemade 12.5 Inch Dobsonian Telescope - Instructables This Instructable describe the planning, design, and parts of the scope, as well as the process of building The scope. he might just have a $3200 camera, they aren't very hard to come by. If you mess up, you can turn the hole into a slot, but avoid I used one of the top scraps from the rocker sides to mark an angle of 70 degrees from the center of the arc to the curved cut in order to properly space 1 X 7/8 teflon pads on the arcs. I used a hole saw to cut a wooden plug to fit inside the It took a lot longer than I expected to receive my mirror and other parts from Discovery. The Artemis module works extremely well, and is to be strongly recommended. All in all it seemed like a pretty robust design, so I gave it Over how many nights did this photography session take place? #@$%^#@!!!!! 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. Another vote for Pierre's helical Crayford design. You will need to order one sized for your telescope's focuser shaft size. But who cares, really? The mount and tripod are pretty much useless for astrophotography. If you want a Crayford focuser with a knob instead of turning the draw tube, then Jerry Oltion's designhttp://www.jerryoltixycrayfords.htm using box frames and knitting needle drive shafts is also a fairly easy build. I paid the 50% deposit and dreamed of DSOs. Interfaced with a computer, so the computer can make the decisions about where the best focus is. And you can tell it's not a mosaic because the stars at the corners show coma/field curvature artifacts. Low, or Zero slop when changing direction. 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. The last time I checked, that particular SBIG camera used on TelescopeGeek had an eight month lead time.A 20" scope gathers 2.6 times more light than a 12.5" scope, therefore equivalent exposures on this one would take 200+ minutes, at least. Shorter thread side will be used to attach the eyepiece. 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. You need to order it sized for your focuser shaft size. I have built a homemade electric focuser for my Celestron 8SE using a radio control hobby servo and some spare parts. Meade Zero Image-Shift Electronic Micro-Focuser This high precision focuser allows you to obtain an extremely accurate image focus. When you want to focus, you just open the program and press focus. It doesn't. A tilted focuser will have no effect on the image quality. It stalled when tension on the belt increased. 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. This can be shimmed out with paper wrapped around the For about $3 we can buy a tank valve kit that has a threaded 2" i.d. surfaces to put the bearings in and a vee at the bottom that would hold It took about 3 weeks but, since Anttler's did not even reply to the Paypal dispute, I received a Paypal refund. Fast forward a few months to the next time I had the tube outside. accessible by all ages and skill ranges. As I mentioned on my binocular var gaJsHost = (("https:" == document.location.protocol) ? The plate has slotted screw holes for tensioning the 6mm belt. Crayford-style design with four bearings and one driveshaft. initiatives for the next generation of makers. I don't *do* pretty. I attached keepers 1 inches wide by 5 inches long, extending above the bottom of the arcs by about 1 inches. We are now ready for some testing. 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. Also, I will work with my computer geek buddies, so that we eventually automate it using Linux on a Rock64, to run kstars for tracking, on INDI. My DIY Motorized Telescope Focuser - YouTube This allows for a small clearance between the outside of the tube and the inside of the tube box (14 3/8). Share it with us! 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. Slewing to find an object and then tracking an object on the sky, so when you make a homemade telescope on the motorisation process you will need high speed for slewing and low speed for tracking or fine movements. In my case I decided to make a custom bracket. 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 focuser. I had already made a lightweight focuser for I tried to call, but the voice mail had a recording stating that the customer was unable to receive messages. Using plywood, make 4 attachment blocks to pair the trusses together and create a small ledge for the secondary cage to rest on while you secure it. I made this Crayford style focuser using plywood scraps and surplus bearings. This is not recommended for shared computers. That evening I spent most of my time rediscovering the many DSOs around Sagittarius, especially the Lagoon Nebula and the Trifid Nebula. Before you do this, the stepper motor will probably move, but it will make a 'stuttering' sound instead of moving smoothly. 24 T-nuts, with matching 2 bolts and knobs, 8 Aluminum tubing, thin wall, 1 square, 4 lengths I got mine from Cycle 24, Black woven velveteen, 68 Cut it so it stretches along the 6 axis. Depending on your telescope, one of the Brackets that Robert has may work for you. Plus it comes in black, so 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 was certain not to move the jig at all before cutting the second circle. All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point .
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