spambots that search the internet for addresses to send junk mail to.) If you go to buy all of the components for this project from dealers, you will see that you mostly have to buy at least 5 parts, sometimes bags of 50 parts! This resulted in a gear that wasn't true and "wobbled" a bit. off the bearings. I would also like to know about how you can take such fantastic pictures without a field rotator and an autoguider system. the bearings right at the edge of the frame, reducing the frame to I welded mine from steel square tubing. I described it two years ago in this thread:https://www.cloudyniuser/?p=8879835 . It stalled when tension on the belt increased. I took the whole tube assembly outside. The version number "312" here may change if Robert posts new firmware. With Simple, Homemade Telescopes, You Can Explore the Stars (Op-Ed) By adjusting the bolts, the mirror can be pointed toward the correct spot. 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. 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. The core of the telescope, the steel mirror cell holds and adjusts the heavy, curved primary mirror. Above youll find an interactive 3D rendering of the Sketchup file I used to design and cut all of the parts for my telescope. This simple homemade device will reduce star trails far better than if the camera was mounted on a tripod alone. Let me see if I am able to collect all the parts needed. With adapters for any Meade 1x200-ACF or LS model, and chord to plug into focuser port. The telescopes size is classified by the size of its mirror. This consists of a small black box of electronics. The silly colours are mainly due to me experimenting with various clothes dyes in the anodising. the side of a rigid secondary cage. Just drill holes in both ends and mount the lenses. Several clamps were used to hold the pieces together overnight. DIY Remote Telescope Focuser - YouTube But, especially on cold evenings, the focus may go out in the middle of the night. I started by trying to drill out a metal gear for the focuser shaft. The premier publication of maker projects, skill-building tutorials, in-depth reviews, and inspirational stories, The shroud made from two 22 inch tall containers came out short, so I had to add an eleven inch strip of nylon. Crayford focusers are considered superior to entry-level rack and pinion focusers, normally found in this type of device. i am not trying to win this contest with photos. As I understand, you are using it for a refractor. Easy DIY motorized battery free telescope focuser - YouTube Participated in the Celestron Space Challenge. 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. Featured in the February, 2015 issue of Sky & These have slop as you change direction, you can't do fine adjustments, they weigh a ton, and can flex alarmingly over time. So, for my telescope I used a 6mm to 5mm coupler available on Amazon. Did you make this project? To get this arc, I actually moved the radius of the jig in by 1/8 inch. Drill a hole and attach the ball head using a shorter 1/4" 20 bolt. Use mild soap and distilled . We are now ready for some testing. More Homemade Refractor Telescope DIY Erecting Prism Binoviewer Focuser here: Did you make this project? Step 3The Side Bearings and Rocker Sides. Keeping with the 'simple ' part of your request, here is a helical 2"/1.25" focuser made from std plumbing parts. weight. wobbly knob still works, and adds character. Once you get it working, there's some calibration you need to do. Since there is no drill bit that exactly matches the 13.1mm of the shaft, I had to do some rough enlargement of the hole. I pointed it at distant trees and had no problem bringing the image into focus with all of my eyepieces. I had already made a lightweight focuser for I want to make this direct drive system work. Plan ahead by carefully weighing all components and approximating the center mass of the optical assembly. I waited until dark and pointed the scope at the sky. case you need more focuser travel than you thought. I don't *do* pretty. forward and back along with the drawtube when you focus, and you'll get you don't need to paint it (or worry about paint flaking off it). With Simple | Space The specific hardware used for this is described on the Building page. Someone is pulling someone's leg here. The plastic will ride on teflon pads, creating just enough traction for the telescope to avoid sliding on its own while not making it too difficult to point at things in the sky. When I ordered the cell, I paid through paypal, which immediately deducts money from my checking account. Un-real!!! needle so the knitting needle will be snug against the drawtube without Stellafane The Focuser I was concerned that it would be difficult to find, but I was able to order it from a local woodworking shop. At their suggestion, I also ordered a 2.6 inch secondary mirror. Built one of these http://emediadesigns.com/focuser/ working really well only cost less than 40.00. Since my focuser shaft is 6mm, I ordered the coupler shown here in the 6mm to 8mm version from Amazon. The cell from Anttler's, for which I had received a refund, had arrived. 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. LVLaserTech is right please do not vote for the pictures my instructable is for the build of the telescope not the quality of the photos.and as i said before i was not there is there a possibility that he sent me the wrong photos sure is there a possibility that he used a different mount than the one i saw sure is there a possibility that he is lying to me me about what he did sure. I redrilled the holes for the mirror cell and got ready to wrap it. Similar photos at http://www.telescopegeek.com/gallery.htm require 100+ minute exposure times on his 20" telescope and $3200 camera. 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. This Instructable describe the planning, design, and parts of the scope, as well as the process of building The scope. And bolt to scope They said they would make the brackets extra long to accommodate the mirror and it would take about a week. 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.) work really well, for a fraction of the cost of a commercial Crayford an inch or so apart, so the focuser body could be pretty low profile. And a couple of upright bearing blocks. 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. The focuser shaft on the telescope is 13.1mm in diameter. Finally it was etched in caustic soda, and anodised matt black. Accordingly, with 1.25 focuser, you can use 1.25 eyepieces, with 2 focuser - both 2 eyepieces and 1.25 (through a special . 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. Download and check them out, I just grabbed the first one and printed it. There are a number of technical reasons why these photographs could not have come from this Optical Tube Assembly. 11 years ago Use the externalMirror Edge Support Calculatorto decide whether to use a two-point, four-point (whiffletree), or sling support. I like the old way of using stepper motors and other stuff introduced years ago by Mel Bartels, he is a master for me. Tips If you've got a 1.25 inch focuser, You can also use it for an objective. Link to the motor speed controller kit:http://www.jaycar.com.au/productView.asp?ID=KC5225(a 5K external potentiometer will be required): http://www.jaycar.com.au/productView.asp?ID=RP3508The drive motor:http://www.jaycar.com.au/productView.asp?ID=YG2734The gears:http://www.jaycar.com.au/productView.asp?ID=YG2736The motor forward/reverse switch:http://www.jaycar.com.au/productView.asp?ID=ST0506The push button:http://www.jaycar.com.au/productView.asp?ID=SP0711 he might just have a $3200 camera, they aren't very hard to come by. Telescope Electronic Focuser : 16 Steps (with Pictures) - Instructables Thanks again for the 'ible. Once your telescope is assembled, drape black woven velveteen around the truss assembly, clipping it with safety pins. Homemade DIY focuser for telescope with computer control - NEUTRAL.org It took yet another call a week later for the items to actually be mailed. The lumber yard also gave me a lower price than I expected. crafts, science & engineering, design, and technology. The box should be deep enough to allow the mirror box to swing all the way down. One of the neat things about the square design is that the on Step 5, 9 years ago You will look through these as you rotate the wheel. 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. To get a slide-fit in a 3D printed part, you normally make the hole 0.5mm larger than the shaft. Finally, attach your polar alignment device and align it with the hinge. If not, you may need to design and print your own bracket(s), gears, and so on. I had designed the tube box so that there would be an extra inch around the tube. It is named after the Crayford Manor House Astronomical Society, Crayford, London, England where it was invented by John Wall, a member of the astronomical society which meets there. Best Wishes, Reply When I looked at the costs, I seriously considered buying an Orion telescope instead of building my own. large in diameter (1.6") so that adds to the fine-ness of the focus The rocker sides are each made of two identical pieces of inch plywood glued together, creating two sides one inch thick. Share it with us! I have already seen some designs on CN, Stellafane and web but still checking if someone has recently made anything simpler. 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. Able to make myself using my own humble tools (or toys as the pros will call them!) love to hear from people who are interested in this focuser design. The day I received the refund, I ordered a mirror cell from University Optics. } 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. 7 years ago I found out pretty quickly that building my own telescope would only be a bargain if I made my own mirror and mechanical parts. If you follow the procedures described above, your telescope's optics will be perfectly aligned. 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. Drawing lines between opposite corners of the tube box sides allowed me to locate the center point on each side. I particularly like that the design can be integrated directly into the focuser board to make a very, very simple UTA. exactly 2" with adhesive labels placed one at a time inside the tube Nice one. Using heavy grit sandpaper I brought back the surface of the keeper enough for the side bearings to fit inside the felt pads. 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. The motor is much lighter than the geared motor. I will post the pic of final focuser once ready. telescope page, I wasn't really eager to buy two commercial Crayford 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. Make the hole diameter fairly snug, too. Thanks for the great comment. Earthbound1 likes this #2 dave brock Mercury-Atlas Several of my Recent Images have been focused with this system. I would love to see your build when you are finished with it . knob, and a drill press to make sure the hole for the knitting needle 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. astronowanabe, Pierre Lemay, LarsMalmgren and. 4 years ago To make the hole for the focuser, I used the focuser tube to mark a circle in the shroud. Able to shift heavy loads of kit ie over 1000g. DIY Truss Dob input: How to design truss? This is not recommended for shared computers. Nice work and great instructable! The Dob is really a great design. I started with a spacer that with a inch outer diameter. This cost around $100 to build and all of the components came from. I Hope to give you ideas if you are thinking about building one for yourself! together tech enthusiasts, crafters, educators across the globe. 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. Today I purchased what is called atank nipple in India. Here is a simple 3D printed helical focuser that cost just a few cents (assuming you have a 3D printer). While round tubing is sturdy, square tubing is easier to work with. Helical is one of the option i am considering. It is size 1.25 inch with a clear inside dia-meter. Building a Homemade Telescope Eyepiece - HubPages DO NOT drill out the holes in the board! I read the entire thread and surely its going to help me building my focuser. I was annoyed to have made the mistake, but very glad that I checked the position on stars before wrapping the tube in veneer. During on-site assembly, attach each truss to its mounting T-nut using a bolt with a thumbscrew knob. It was easy enough to drill a hole and tap threads for a Edited by howardcano, 24 May 2020 - 09:29 PM. (actually, it ended up a smidge more than 2 inches) Lighter than the existing focuser. Before finishing the tube with a wrap of veneer, I wanted to make sure that the primary was in the correct position. Pioneered by John Dobson in the 1960s, the instrument combines a Newtonian reflector telescope with a unique two-axis movable base. Motorise Your Own Telescope (updated 10-19-2017). - Instructables on Step 1, Richards in our local astronomy club. on Introduction. The mirror cell: University Optics (eventually). As I mentioned on my binocular 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. Very simple and portable. The focuser 'knob' on the Celestron is just a rubber sleeve that usually pulls off easily. 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. Given any mirror measurements, PLOP will provide the ideal support layout and how much distortion to expect for any number of flotation points. the tube is cardboard as well, you can also get a quality mirror at telescope.com for much cheaper. Unbelievable! Your astrophotographer friend may have included his own images from his setup. 10 inch or 12 inch. The Artemis module works extremely well, and is to be strongly recommended. The side bearings are each made from 2 identical semicircles of 5/8 inch plywood glued together to make a thickness of 1 inches. The mount and tripod are pretty much useless for astrophotography. This was to allow the circle cutting jig to be attached to the board to cut the arcs from a center point of 25 inches above the ground. on Step 5, After much debit and doubt i have taken the photos down cause i cannot be 100% sure that they were taking from my scope as i was not there to verify them and i do not want my contest entry to be based on photos and not the build process. I tried to call, but the voice mail had a recording stating that the customer was unable to receive messages. 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. I'll use an aluminum tube for the finished draw tube but for now the plastic tube . You should watch (and bookmark) this video. on Introduction. Line the underside of the rocker box with a ring of ABS plastic to allow it to ride on the base. Next step, before my first acquisition of any parts, is to get with any amateur astronomers in Central Florida, so, wish me luck! Start with the small components first. When you want to focus, you just open the program and press focus. 11 years ago I sanded all parts of the telescope with 220 grit sandpaper followed by 400 grit, making a very smooth surface to apply the stain. 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. Inside the OTA is a ring of tightly fitting flocking paper that prevents any light getting in around the drawtube. I have no dog in this hunt whatsoever, but if people are impressed by these photographs and vote for it because of them when there's no proof that this scope generated the photos and there IS data to the contrary (see below), then that's certainly not fair to the other contestants. All that remained was to design and print a bracket, and buy the needed parts. Secondary mirror with spider holder Search on eBay for a matched set. Two of the holes for the bolts were blocked by knobs. This motor is available on Amazon. CNC files (optional) Download the Sketchup files. It may need some careful coaxing with a screwdriver. 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 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. small, it's surprisingly rigid. PVC pipe makes great drawtubes. But I wanted a larger mirror, and, at that size, grinding my own was not an option. Membership connects and supports the people and projects that shape our future and supports the learning Gift the gift of Make: Magazine this holiday season! I file a dispute with Paypal to begin the process of getting my money back. Another vote for Pierre's helical Crayford design. I sourced my own Stepper motor and 1:150 reduction gearbox from RS, who are just up the road. You can view and download the full file here. Let me see if I can get similar plumbing parts here. 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. Below are cutting diagrams and diagrams of the rocker and tube box with side bearings. Crayford-style design with four bearings and one driveshaft. 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. Find a special something for the makers in your life. Just as it was about to come into focus, the focuser bottomed out. 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. I have several of the books on building a Dobsonian Telescope. They eyepiece height ended up being about 5'10" high at zenith. 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. 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. Sh2-169 and Sh2-168, IC5146 Cocoon Nebula, Caldwell 19, Sh 2-125. Not sure if it is available in the USA. Most people will want a knob on And you can tell it's not a mosaic because the stars at the corners show coma/field curvature artifacts. I drew a guide line straight down the side of the tube and cut the veneer to length with one extra inch on each side68 inches long. on Introduction. Two different construction supply companies told me that sonotubes were not available with a 14 inch diameter, even by special order. Depending on your telescope, one of the Brackets that Robert has may work for you. 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. Part numbers 351-4574 and 336-422. I do it with aluminium alloy, aluminium tube and nice work. Brandon Lawler is a hobbyist telescope Maker and an active member of the Central Texas Astronomical Society. Showcasing amazing maker projects of 2022. I didn't bother reading his whole article to figure out what f/# he used) I am not trying to say that good AP isn't possible with a sonotube scope, (the 'friend' may very well have pulled it out of the dob mount, added rings and a dovetail, and mounted it on his CGE-Pro or comparable) but in this case it is unlikely.". Share a cool tool or product with the community. Wooden Telescope Part 2: Tube and Mount - Instructables 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. If you mess up, you can turn the hole into a slot, but avoid Trim off any unused fabric along the base. really stiff and light for their size, and even though a #2 is pretty And, once your telescope is finished, be sure to join a local astronomy club to learn more about the sky and share your hobby with others. DIY Electric Focuser - ATM, Optics and DIY Forum - Cloudy Nights It turns out the the extra 1/16 allowed far too much side to side movement between the rocker and ground board. My concern turned to alarm when my wife told me that Discovery had charged the balance due on all items to my account a few weeks earlier. Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . In the "ARDUINO FIRMWARE" folder, in it you will find a ZIP file "myFP2-Firmware 312-1.zip". 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. 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. 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. 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. var gaJsHost = (("https:" == document.location.protocol) ? Save over 40% off the annual cover price for a full year (4 issues) of Make. The only thing on the list that was a bit difficult to find was baltic birch plywood, which had to be special ordered from the lumber yard. help eliminate slippage when the focuser is pointed straight upward. 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. It seems to Every primary telescope mirror has a fixed focal length thats usually 4 to 6 times the width of the mirror. I think I got what I wanted and seems best solution for me. 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. Or in my case, back to SolidWorks :-). flexing. Cost is $25 - $30, and you will have 5 PCBs in about a week. I told them I was on my way. 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. Rather than use a sheet of plastic Kydex to finish the tube, as recommended in K/B, I ordered a sheet of birch veneer. 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. my thoughts naturally gravitated toward a boxy focuser to go with it. 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. It was May 12th. 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. The cost is a bit more than some of the other combinations, but by only $10 or $20. 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. The wide square footprint would make it pretty stable when mounted to I phoned in the order in the last week of February and was told that it would take about 4 weeks to deliver the mirror. 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. "https://ssl." Share it with us! Have you made any mods on it since you built it? I set things up in daylight and collimated the scope. 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. 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. My newtonian telescope, like most others, came fitted with a nasty rack and pinion focuser. Focuser minimum height is 50 mm and maximum a little over 90 mm so it is good overall. A Beginner's Guide to Collimation - Gary Seronik Subscribe to the premier DIY magazine today, Community access, print, and digital Magazine, and more. That helps with low-profile Total cost for supplies for this project: It took a lot longer than I expected to receive my mirror and other parts from Discovery. Along with some silver bits 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. I first tried my 32mm plossl eyepiece. 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 Another thing, the resolution on the Dumbell nebula seems a bit too high for that telescope.
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