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Electronics and software automate the process of taking pictures. Tom's Homemade Telescope Page - 14 inch dob - Google Knitting needles are I want to make this direct drive system work. on Introduction, Very nice build nikon20. A week later the cell arrived (on schedule) from University Optics. DIY focuser design - ATM, Optics and DIY Forum - Cloudy Nights We moved the operation to a nearby park and got a focused image of the most distant trees (300-400 yards away) quite easily. 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. Perfect for astrophotography or during high power planetary observation. 1" Rack & Pinion Focuser. The silly colours are mainly due to me experimenting with various clothes dyes in the anodising. As I mentioned on my binocular I had considered using a clear finish alone, but decided to use a dark red finish on the base and a clear finish on the tube, just because I like the look. My homemade motorized telescope focuser for Celestron C8. The specific hardware used for this is described on the Building page. At this point, the scope was pretty much finished. 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. Also no obvious diffraction spikes in the m31 photo. Since these focusers were going side-by-side on a binocular I only use the OTA. This sure is going to be a project I will work on. on Introduction. I didn't receive any confirmation email after a few days, so I tried to send them an email. I attached them with very small brads, countersinking the brads. The Artemis module works extremely well, and is to be strongly recommended. $299.99 More About Telescope Focusers Fire up focusmax, and shoot some images! 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. (A badly tilted focuser may subtly alter the illumination pattern of the focal plane to a degree that would be impossible to perceive visually but that's about it.) I brought a saw with me so that I cut it in half to fit in my minivan. If you look in the FILES area on Robert Brown's site (see link above) you will see a sub-folder "3D Printed Parts". Drill a hole and attach the ball head using a shorter 1/4" 20 bolt. 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. I first tried my 32mm plossl eyepiece. 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. Because mirror flexure can distort an image, supporting the mirror properly involves building a flotation cell. Several of my Recent Images have been focused with this system. To cut the circles, I started with a depth of about 1/8 inch, then lowered the bit and cut a little more with each pass until I was through the board. a try. The 48 inch width of the veneer was close enough to the diameter of the tube that I used it as is. The day I received the refund, I ordered a mirror cell from University Optics. Share it with us! . If you found some good surplus lenses, you will have made a stunningly good objective for your scope. by cranking 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. Made of plywood, the rocker box supports the mirror box on 1 teflon pads, allowing it to rotate vertically. The core of the telescope, the steel mirror cell holds and adjusts the heavy, curved primary mirror. 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. 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. 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. 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. on Step 5, 9 years ago I would also like to know about how you can take such fantastic pictures without a field rotator and an autoguider system. accessible by all ages and skill ranges. my 12.5" trackball, but I didn't needle adds no friction that I can feel to the focus action. Once its cut to length, drill a hole through each end of the tubing with a drill press. 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. I wanted the long focal length for good contrast. Well, it sort of looks like a focuser.. See pictures below. I tried this one first and found it wouldn't work for my application. 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. They have many items for ATMers and I had frequently visited their website when planning my scope. This one is based on the DRV8825 driver chip and a NEMA-17 stepper motor. Meade Zero Image-Shift Electronic Micro-Focuser This high precision focuser allows you to obtain an extremely accurate image focus. Funny how the bigger they are the better for dobs. I wanted to finish that instructable before the contest ended but was too late :-). To get this arc, I actually moved the radius of the jig in by 1/8 inch. 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. 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. 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. My DIY Motorized Telescope Focuser - YouTube Secondary mirror with spider holder Search on eBay for a matched set. DO NOT drill out the holes in the board! I was concerned that it would be difficult to find, but I was able to order it from a local woodworking shop. This will determine the size of the coupler you will use to connect the stepper motor. Start with the small components first. It has become an indispensable piece of equipment for me that so beats hacking and filing PVC pipes etc. The one company that did provide a price quoted over $500more than I was willing to pay for cardboard! Frustrated by these difficulties, I stopped by one more hardware store to ask for advice. forward and back along with the drawtube when you focus, and you'll get Homemade Electric Telescope Focuser - Stargazers Lounge Here is a link to the main FILES area on Robert Brown's site. If you don't want to go that route, contact me at gary.hethcoat@gmail.com since I have a lot of spare parts and I can sell you a "kit" with a PCB and only the parts you need. Use the externalMirror Edge Support Calculatorto decide whether to use a two-point, four-point (whiffletree), or sling support. To do this, the mirror cell needs to be supported by 3 large bolts, at least 2 of which are adjustable. case you need more focuser travel than you thought. DIY Craford Focuser. Im quite happy with the result, and the view in its large mirror is phenomenal. This can be shimmed out with paper wrapped around the 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. Before finishing the tube with a wrap of veneer, I wanted to make sure that the primary was in the correct position. After you've done that, put a couple of tiny pan-head screws Earthbound1 likes this #2 dave brock Mercury-Atlas One of the neat things about the square design is that the Line the underside of the rocker box with a ring of ABS plastic to allow it to ride on the base. I got a different stain, tested it, and went back to work. Download and check them out, I just grabbed the first one and printed it. on Introduction. 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. 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. you don't need to paint it (or worry about paint flaking off it). The premier publication of maker projects, skill-building tutorials, in-depth reviews, and inspirational stories, Rather than use a sheet of plastic Kydex to finish the tube, as recommended in K/B, I ordered a sheet of birch veneer. I will get good 30-40 mm focusing range. To place the primary mirror, I installed the secondary and installed the primary in the mirror cell. All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . Feel free to take on that part if you like, but you're on your own :-). 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. But, like many of you I'm sure, the biggest reason I'm doing this is for the pure geeky fun of it! the tube is cardboard as well, you can also get a quality mirror at telescope.com for much cheaper. I do it with aluminium alloy, aluminium tube and nice work. 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.". While a sling or whiffletree provide the best edge support, a two-point edge support is much easier to construct. Thanks for the great comment. Once I decided to build a scope myself I had to decide on the aperture of the scope. The cell from Anttler's, for which I had received a refund, had arrived. Be creative! ASIAIR - Is there an easy way to load Messier catalog into Autorun? Nice one. experimented with various wires and rods and eventually decided that a Here is what I was working on but looks like I need a better design. help eliminate slippage when the focuser is pointed straight upward. I also wanted to buy the other mechanical partsmirror cell, spider, secondary holder, and focuserso that the performance of these pieces was not limited by my skills. I suspected that the company was either in trouble or no longer in business. Make the hole diameter fairly snug, too. Sh2-169 and Sh2-168, IC5146 Cocoon Nebula, Caldwell 19, Sh 2-125. I'll use an aluminum tube for the finished draw tube but for now the plastic tube . astronowanabe, Pierre Lemay, LarsMalmgren and. I marked the spot and moved things back inside to install the mirror. Two such companies would not give me a price because the order of a single tube was too small. We use cookies to continuously improve our websites for you and optimize its design and customization. Pioneered by John Dobson in the 1960s, the instrument combines a Newtonian reflector telescope with a unique two-axis movable base. These will be stored in your browser only with your consent and you have the option to opt-out. think that design would be rigid enough under the weight of a diagonal 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. 100A81BF-2145-44D5-BC76-66DBF43BAD58.jpeg. 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 particularly like that the design can be integrated directly into the focuser board to make a very, very simple UTA. How to build a 12.5 inch closed tube Dobsonian telescope. 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. Wooden Telescope Part 2: Tube and Mount - Instructables For my project I needed a 14 inch diameter, and I had a tough time finding one. Did you make this project? This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". You really need a step ladder even for my 10" when pointed overhead. Since my plan called for purchasing the mirrors and mechanical parts there were several decisions to be made and several vendors to contact. Once built, line the undersides of the arms with textured ABS plastic as a bearing surface. 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. If you're going for simple, have you considered a helical focuser? The pieces were cut down to 15 3/8 and 14 3/8, allowing just under 1/8 inch on each side. Sonotube (14 inch diameter, 12 feet long): $70, Focuser (GSO 2 speed low profile Crayford): $139, Total cost for supplies for this project: $1700. 5 weeks after I had ordered the mirror, I called to ask about its status. larger diameter. 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. eyepiece on the ground (or worse, on your primary mirror!) I have not yet figured out a better way to hold the tube. They suggested a construction supply place on the other side of the city that I had not called yet. They eyepiece height ended up being about 5'10" high at zenith. 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. After waiting for the stain to dry for a day, I applied polyurethane in two coats, going over the surface with 0000 steel wool between coats. And bolt to scope Building a Homemade Telescope Eyepiece - HubPages homemade Crayford focuser. I am using scrap upvc pipe material. Thicker knitting needles would be even PVC pipe makes great drawtubes. On the bottom of the Bottom board is a ring of Ebony Star laminate that glides over the three teflon pads located directly above the feet on the ground board. 1N5408 3A Diode (you may need to make the pins smaller to fit through the holes in the board. 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. If the telescope rotates forward or backward on its own, then the mirror box is too deep or too shallow. A project collaboration and documentation platform. Your choice here will be recorded for all Make.co Websites. off the bearings. Most people will want a knob on Measure the diameter of the exposed shaft. I had already made a lightweight focuser for I 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. I also figured that the extra expense was worth it, considering the amount of money I was investing in the project overall. I think I got what I wanted and seems best solution for me. I then attached the Ebony Star ring using contact cement. was straight so I wouldn't get a wobbly knob. You need some purple bits This allowed me to cut perfect identical circles. Telescope Focusers | Orion Telescopes: Shop Unbelievable! They use a simple plywood mirror cell, stating that for an 8 inch mirror this cell will be adequate. Their step by step instructions were invaluable to me as I built this scope. 11 years ago I don't have the skills to build a focuser using a. adapter set screws to slide into. Make an account on JLCPCB.com, upload the Gerber zip file, that's it! Share a cool tool or product with the community. Stellafane The Focuser Building Your Second Homemade Telescope - Part 1 - HubPages After a few weeks of no communication from them, no ability to phone or email them, and no mirror cell arriving. 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. The wide square footprint would make it pretty stable when mounted to stronger, but would give me a coarser focus action because of their Your design is simple and nice. They even offered to send the spider, secondary holder, and secondary mirror immediately so that I could begin working on the tube while I waited for the primary. In amateur astrophotography, we run our telescopes overnight. on Step 5. Download and unzip. The little app is simple and works great. I sanded all parts of the telescope with 220 grit sandpaper followed by 400 grit, making a very smooth surface to apply the stain. You will look through these as you rotate the wheel. To interface with the computer, I have used the Artemis Focuser module from Steve, Arthur and Co. on Step 1, interesting build, its just like my old Odyssey brand scope from the mid 1990's. After waiting for the contact cement to dry to the touch, and with my wife's help, I carefully aligned the edge of the veneer with the guideline on the tube and pressed the first inch together. The version number "312" here may change if Robert posts new firmware. #@$%^#@!!!!! I made this Crayford style focuser using plywood scraps and surplus bearings. The company has a reputation for excellent optics, and it was neither the most expensive, nor the least. I set things up in daylight and collimated the scope. I like the old way of using stepper motors and other stuff introduced years ago by Mel Bartels, he is a master for me. 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. A couple setscrews and you're up & running with an off the shelf solution. I'm also going to focus on only one version of Robert's focuser (there are many). 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.