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. 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.". I did not glue the bearings to the tube box in case I needed to adjust the position later. wobbly knob still works, and adds character. Pioneered by John Dobson in the 1960s, the instrument combines a Newtonian reflector telescope with a unique two-axis movable base. It took about 3 weeks but, since Anttler's did not even reply to the Paypal dispute, I received a Paypal refund. on Step 5, 9 years ago The secondary holder is adjustable, so I could didn't have to get the location perfect. 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 will post the pic of final focuser once ready. The back of the mirror floats on 3 or more support points (this build uses 6) that are calculated usinga software tool called PLOP. This proved fatal for the stepper motor! I had talked with their owner about mirrors and mirror cells once, and I was very impressed by his knowledge of telescope building. Built one of these http://emediadesigns.com/focuser/ working really well only cost less than 40.00. In my case I decided to make a custom bracket. eyepiece on the ground (or worse, on your primary mirror!) my 12.5" trackball, but I didn't it sticks into your light path. on Introduction. 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. SDO/HMI Continuum Image on 2023.03.04 at 1259 UT, Remote computer working with no extra networking. Now attach the screw eyes and the rubber band on the side of the board. I do have another tube that can be used around the drawtube, but it doesn't really add anything. Some of the very best planetary and deep sky pics I have seen have come from a Fuji S3 professioanl camera [based on a Nikon body] and a Canon 20Da, which was designed with [I think] a user replaceable inside the mirror box filter for astral photography. Their step by step instructions were invaluable to me as I built this scope. OK, no, I do not have a homemade Crayford focuser but am planning to build a 3 incher for next years 17" reflector telescope project and to hold my new 30mm ES 100 degree EP. Next, attach the eyepiece and the focuser to the top part of the telescope tube. They have many items for ATMers and I had frequently visited their website when planning my scope. I marked the spot and moved things back inside to install the mirror. 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. 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. My newtonian telescope, like most others, came fitted with a nasty rack and pinion focuser. rod for the drive axle it would have a fairly fine motion. 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. on Introduction. Cost is $25 - $30, and you will have 5 PCBs in about a week. Once built, line the undersides of the arms with textured ABS plastic as a bearing surface. An electronic focuser, which moves the focus knob through a combination of hardware and software, solves this problem. It turned out that they had an incorrect zip code and the package was still waiting to be sent. The part is very strong! Perfect for astrophotography or during high power planetary observation. What materials did you use? the side of a rigid secondary cage. 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. 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. You will look through these as you rotate the wheel. Thicker walls also required thicker side bearings so that the outside of the bearings would line up with the outside of the rocker sides. 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). Bore out some 2.5 inch bar and mill a flat down the side making sure it is lined up. Meade Zero Image-Shift Electronic Micro-Focuser This high precision focuser allows you to obtain an extremely accurate image focus. But I wanted a larger mirror, and, at that size, grinding my own was not an option. I'm only hoping to supplement it a bit with some info and pictures aimed at those with limited skills (such as myself) :-) I'm not an electrical engineer, I'm more of a software guy with some limited knowledge of electronics and basic soldering and assembly skills. Participated in the Celestron Space Challenge. We are now ready for some testing. Read the documentation though, there are a lot of functions and options. 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. For the ATMer I do find that there are an endless number of parts that can be designed and printed for home built telescopes and binoscopes. Another thing, the resolution on the Dumbell nebula seems a bit too high for that telescope. After another 3 weeks, I was concerned that I had not received the mirror. So, I duplicated the aluminum gear pulley in SolidWorks, and printed it out. Since these focusers were going side-by-side on a binocular Measure the diameter of the exposed shaft. 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 drawings are only approximately to scale. A free program that lights childrens creative fires and allows them to explore projects in areas such as arts & When you're ready to go on to testing with the windows driver, you want "myFP2_DRV8825_312-1", open that folder. It had been described by many as the most important recent volume for anyone planning to build a dob, and I have to agree. Drill the holes for the knitting It is size 1.25 inch with a clear inside dia-meter. Able to make myself using my own humble tools (or toys as the pros will call them!). Able to shift heavy loads of kit ie over 1000g. Your choice here will be recorded for all Make.co Websites. experimented with various wires and rods and eventually decided that a If not, you may need to design and print your own bracket(s), gears, and so on. (The 8 inches from the center of the secondary to the field stop in the focuser is the same 8 inches from the center of the focuser to the top of the tube.) Share it with us! Once you get it working, there's some calibration you need to do. Only problem is if I put a diagonal it wants to rotate the helical part. by cranking If you're going for simple, have you considered a helical focuser? 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. Download and check them out, I just grabbed the first one and printed it. I am thankful to enjoy the inspiration, and the details, that you provide, as I will soon be constructing a Dobsonian Telescope. Plus it comes in black, so you don't need to paint it (or worry about paint flaking off it). (Sorry you The little app is simple and works great. I will have a lot of fun building my homemade 12.5 inch Dobsonian Telescope!!! It may take you a while to adjust the image correctly, but it's not hard to do, just time consuming. I had to take apart the focuser in order to get my bolts in place. The kit just contains the electronics - it is up to the user to find a stepper motor and attach it to their own telescope focuser. Headers for the LEDs, buzzer (2-pin) and temperature probe (3-pin). 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. corners of the squares provide nice nooks for the eyepiece and eyepiece Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. It was important that the two circles be identical because the edges had to match perfectly when glued together and the two side bearings had to be identical in order for the altitude motion to work well. But -- you have to be careful that the mechanism is true and the motor does not have a load on it at any time, otherwise it will 'stall' and stop moving. I installed the spider first, about one inch down from the end of the square end of the tube. The blue pieces of the rocker box and ground board are arranged as in the diagrams in (figure 2). 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. While I will freely admit that most astro-photography is WAY beyond me, you certainly do NOT need a $3200 camera to do so. I was concerned that it would be difficult to find, but I was able to order it from a local woodworking shop. I file a dispute with Paypal to begin the process of getting my money back. the bearings, totally eliminating any flex. The box should be deep enough to allow the mirror box to swing all the way down. This resulted in a gear that wasn't true and "wobbled" a bit. Dobsonians come in all shapes and sizes, from small 4-8 builds all the way up to massive 24-36 creations. (actually, it ended up a smidge more than 2 inches). Parts List (the full story of acquiring the parts), The primary, secondary, spider and secondary holderDiscovery Optics. Today I purchased what is called atank nipple in India. 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. $299.99 More About Telescope Focusers with a genuine question or comment about the design. If you connect the 12V power with the barrel connector (right side of photo), the Nano should light up without the USB connection. Step 4Attaching the Side Bearings and assembling the Rocker. Orient this assembly to allow you to view an object on the far horizon. Best Wishes, Reply The bigger upvc nut will be attached to focuser plate and longer threaded side will be used on it for the focusing. This means I can use FocusMax to do the focusing. I ground and figured the mirror with little troubles, making my focault tester, etc. you don't need to paint it (or worry about paint flaking off it). 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. I made a similar helical focuser with a nice 2 inch thing I found in Classifieds. It wouldn't be a two-speed design, but if I used a thin enough Connect the Arduino USB cable and upload some test sketches. Home centers and hardware stores did not carry large sizes. small, it's surprisingly rigid. There are some test sketches in the "Tests" folder, start with those. adapter set screws to slide into. ill ask him for a detailed list of what he used and when i get that ill post it here for you. The rocker arms must also have guides to keep it on the track; flat metal 12 braces lined with ABS plastic work nicely. I had designed the tube box so that there would be an extra inch around the tube. Several clamps were used to hold the pieces together overnight. I started with a spacer that with a inch outer diameter. I would love to see your build when you are finished with it . 4 years ago 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. until a 2" eyepiece or 1.25" adapter is snug. By adjusting the bolts, the mirror can be pointed toward the correct spot. The wide square footprint would make it pretty stable when mounted to astronowanabe, Pierre Lemay, LarsMalmgren and. 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. His passion is using CAD design and his homemade CNC router to bring large wood projects to life. narrow the frame. Not sure how your toilets are built over there, but here they use what is called a tank flush valve. 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. So, am curious to see what others have designed and built and proud to show off here on the homage to Crayford thread. These will be stored in your browser only with your consent and you have the option to opt-out. crafts, science & engineering, design, and technology. "https://ssl." This arrangement turns 100% true, no wobble. This consists of a small black box of electronics. once. These have slop as you change direction, you can't do fine adjustments, they weigh a ton, and can flex alarmingly over time. This makes for better sky photographs as the exposure time can be lengthened,. The mirror cell: University Optics (eventually). Finally, attach your polar alignment device and align it with the hinge. My secondary is 4; for tips on choosing size, click here. tube and nut that fits the outside threads. This NEMA-17 direct drive stepper motor is available from Adafruit and many other sellers. Here is what I was working on but looks like I need a better design. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. This is where you will use screws to strongly attach the focuser onto the tube. 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. 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. I made this Crayford style focuser using plywood scraps and surplus bearings. on Step 3. Once Id built a CNC router, I embarked on my third telescope, featuring a 16 primary mirror with aluminum trusses, wide vertical bearing arcs, a steel front-adjustable mirror cell, and a rotating base. Let me see if I can get similar plumbing parts here. 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. Thank you for your pages. I called in the order and explained that I would be using a mirror two inches thick. The focuser is the part of the telescope that holds the eyepiece or camera, and by moving in or out, closer or farther from the . To interface with the computer, I have used the Artemis Focuser module from Steve, Arthur and Co. surfaces to put the bearings in and a vee at the bottom that would hold Im sorry to hear you couldn't make the contest. In the "ARDUINO FIRMWARE" folder, in it you will find a ZIP file "myFP2-Firmware 312-1.zip". When you want to focus, you just open the program and press focus. I decided to keep this tube for now and if I run into problems with it, I can replace it later. I was annoyed to have made the mistake, but very glad that I checked the position on stars before wrapping the tube in veneer. Featured in the February, 2015 issue of Sky & There are a number of technical reasons why these photographs could not have come from this Optical Tube Assembly. A Pocket Sundial From a Broken Pocket Watch! The basic points I wanted to cover: What did I end up with? I do it with aluminium alloy, aluminium tube and nice work. Those are the last screws to be tightened. It's rigid, lightweight, and It has reminded me of one of my long term aims to make a telescope that has been buried by the demands of the rest of my life!
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