homemade telescope focuser

Here is what I was working on but looks like I need a better design. 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 on Step 5. 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. A celebration of the Maker Movement, a family-friendly showcase of invention and creativity that gathers Below are cutting diagrams and diagrams of the rocker and tube box with side bearings. I It turned out that they had an incorrect zip code and the package was still waiting to be sent. Helical is one of the option i am considering. 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. I carefully cut exactly through the center of each side bearing circle to make my semicircles. 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.) 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. What materials did you use? But who cares, really? I am working on a diy focuser design for my 6" F/8 telescope and asking suggestions for simple focuser. Maker-written books designed to inform and delight! 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. After a few weeks of no communication from them, no ability to phone or email them, and no mirror cell arriving. Tom's Homemade Telescope Page - DIY Craford Focuser - Google the tube is cardboard as well, you can also get a quality mirror at telescope.com for much cheaper. I also figured that the extra expense was worth it, considering the amount of money I was investing in the project overall. I did not wrap the tube until I had completed the base. Total cost for supplies for this project: It took a lot longer than I expected to receive my mirror and other parts from Discovery. You need a drawtube of course. I Hope to give you ideas if you are thinking about building one for yourself! 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. Easy DIY motorized battery free telescope focuser - YouTube To view, go here: http://emediadesigns.com/focuser/ ill ask him for a detailed list of what he used and when i get that ill post it here for you. Did you make this project? That way you won't be dropping your drawtube and I'm' glad I did, because I didn't like the first color that I had chosen. At this point, the scope was pretty much finished. Low, or Zero slop when changing direction. As I read the book I decided that I should build a 12.5 inch truss tube scope. Share a cool tool or product with the community. I'd So, for my telescope I used a 6mm to 5mm coupler available on Amazon. My telescope is the Orion ED80T-CF. telescope page, I wasn't really eager to buy two commercial Crayford 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 focuser 'knob' on the Celestron is just a rubber sleeve that usually pulls off easily. The email bounced back to me. When you figure out 10 inch or 12 inch. 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. 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 used my router to "mill" a flat area for better contact with the focus adjustment rod. Homemade astronomy. Not sure how your toilets are built over there, but here they use what is called a tank flush valve. 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 should now be able to drill the 4 holes at each corner. 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. A couple setscrews and you're up & running with an off the shelf solution. (actually, it ended up a smidge more than 2 inches). To interface with the computer, I have used the Artemis Focuser module from Steve, Arthur and Co. 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. I have built a homemade electric focuser for my Celestron 8SE using a radio control hobby servo and some spare parts. You reach a point where the picture doesn't seem to change much, so you never know where the very sweetest spot in the focus is. curated by us, the people behind Make: and the Maker Faire. I like the old way of using stepper motors and other stuff introduced years ago by Mel Bartels, he is a master for me. This combination has the best resolution (steps/revolution), so I didn't see any reason to build anything else. 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. It was easy enough to drill a hole and tap threads for a The flat wants to be running parallel to the long axis of the tube. A bit of a monster! Rack & Pinion: For many years the standard focuser was of the rack-and-pinion type - a small pinion gear moved the flat toothed rack that was attached to or built into the moving focusing tube that holds the eyepiece.However, this geared system was far from ideal, with some wobble due to the friction fit between the fixed and moving tubes and backlash due to the gears. This is the kind of simple off the shelf design I was looking for. Telescope Electronic Focuser : 16 Steps (with Pictures) - Instructables This motor is available on Amazon. I think I got what I wanted and seems best solution for me. exactly 2" with adhesive labels placed one at a time inside the tube Edited by howardcano, 24 May 2020 - 09:29 PM. with a genuine question or comment about the design. installations. Place the focuser, draw the position of the screws with a pencil and remove the focuser. I had to take apart the focuser in order to get my bolts in place. I did not glue the bearings to the tube box in case I needed to adjust the position later. I did run into a small problem with the focuser. Building the mirror box is tricky, because the entire optical assembly (mirror cell, mirror box, trusses, secondary cage) must balance at the center of rotation of the arms. Let me see if I can get similar plumbing parts here. he might just have a $3200 camera, they aren't very hard to come by. 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. This resulted in a gear that wasn't true and "wobbled" a bit. 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. wobbly knob still works, and adds character. It's the same in form, but has a perfect, true 13.35mm hole. 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. The version number "312" here may change if Robert posts new firmware. 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. Share it with us! My homemade motorized telescope focuser for Celestron C8. They suggested a construction supply place on the other side of the city that I had not called yet. The part is very strong! 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. on Introduction. larger diameter. tube and nut that fits the outside threads. That evening I spent most of my time rediscovering the many DSOs around Sagittarius, especially the Lagoon Nebula and the Trifid Nebula. Interfaced with a computer, so the computer can make the decisions about where the best focus is. Ideally, the spacer would be 1 inch long and have a smaller diameter, but I didn't get this one right the first time. 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. I have no idea how much mail this idea will generate, so I can't Two different construction supply companies told me that sonotubes were not available with a 14 inch diameter, even by special order. I pointed it at distant trees and had no problem bringing the image into focus with all of my eyepieces. Plus it comes in black, so Drawing lines between opposite corners of the tube box sides allowed me to locate the center point on each side. Several of my Recent Images have been focused with this system. 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. 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. 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. His passion is using CAD design and his homemade CNC router to bring large wood projects to life. really stiff and light for their size, and even though a #2 is pretty All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . Fairly easy to build and could be adapted to suit any SCT focuser. I sourced my own Stepper motor and 1:150 reduction gearbox from RS, who are just up the road. "https://ssl." The hole did need to be enlarged slightly by moving the bit within the hole , but in the end, the fit seems right. was straight so I wouldn't get a wobbly knob. To test the concept I used a short piece of two inch PVC for the draw tube. I built mine entirely from CNC-cut plywood, and fastened it together with 2 bolts. When you want to focus, you just open the program and press focus. This motor is available on Amazon. I don't have the skills to build a focuser using a. The secondary holder is adjustable, so I could didn't have to get the location perfect. They eyepiece height ended up being about 5'10" high at zenith. Fire up focusmax, and shoot some images! (Technically, it should have been 62.5 for a 12.5 inch f/5, but when the mirror came it had a note on the back that the focal length was 61 inches.) Move the jigs until you can comfortably place a variety of eyepieces in the focuser and get a sharp image, then carefully measure the separation distances. surfaces to put the bearings in and a vee at the bottom that would hold I read the entire thread and surely its going to help me building my focuser. 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. 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. Make the hole diameter fairly snug, too. You can see that my Moonlite focuser was slightly larger than the sides of the tube. 10 years ago I am well versed in technology, have all the tools necessary to build my own! Edited by Pierre Lemay, 25 May 2020 - 08:10 AM. Orion Dynamo Mini for powering a Nexstar 6SE? I tried this one first and found it wouldn't work for my application. Pretty dry but important! This can be shimmed out with paper wrapped around the If you found some good surplus lenses, you will have made a stunningly good objective for your scope. How to make diy focuser pvc - YouTube Im sorry to hear you couldn't make the contest. Likewise, the side bearings are made of two identical semicircles of 5/8 inch plywood glued together, creating side bearings that are 1 inches thick. And you can tell it's not a mosaic because the stars at the corners show coma/field curvature artifacts. 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. These have slop as you change direction, you can't do fine adjustments, they weigh a ton, and can flex alarmingly over time. One of the neat things about the square design is that the An electronic focuser, which moves the focus knob through a combination of hardware and software, solves this problem. Crayford-style design with four bearings and one driveshaft. Someone is pulling someone's leg here. var gaJsHost = (("https:" == document.location.protocol) ? I even began taking careful notes about needed supplies and plans for each piece of the truss tube scope. I had installed the mirror about an inch too far away from the focuser. Perfect for visual observations with very heavy mirrors. Community Forum Software by IP.BoardLicensed to: Cloudy Nights. Not worth the effort, price is tooo high. A homemade 16 inch dob lightweight telescope, DS-4 - XMission I do it with aluminium alloy, aluminium tube and nice work. One of the companies I had considered as a supplier for the primary mirror was Anttler's Optical. In scaling up the K/B 8 inch design, I made a few changes that, I hope, will improve the design for 12.5 inch aperture. I ground and figured the mirror with little troubles, making my focault tester, etc. Featured in the February, 2015 issue of Sky & I drilled the holes in the center of the ground board and rocker bottom using a 9/16 bit, thinking that I needed the extra 1/16 so that the spacer could move. It takes the unknown out of focusing, and is easy to re-focus between filters, or refocus several times during a long exposure run as the world cools down. And a couple of upright bearing blocks. But, like many of you I'm sure, the biggest reason I'm doing this is for the pure geeky fun of it! I had some carboy caps that make good knobs. I only do functional. Brandon Lawler is a hobbyist telescope Maker and an active member of the Central Texas Astronomical Society. Dozens of projects in every issue covering electronics, craft, fabrication, and more, Learn tips and skill-building tutorials from experts in the maker community. 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. 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. Among amateur telescopes, the most common are focusers with landing diameters of 1.25 ", 2", rarely 0.965 ", and even less often - 3". The lumber yard also gave me a lower price than I expected. Post 10 of the same LSDF focuser thread also links to Art Bianconi's archived 2008 original flush valve focuser posts. Im quite happy with the result, and the view in its large mirror is phenomenal. : "http://www. A free program that lights childrens creative fires and allows them to explore projects in areas such as arts & Once I had my design set, I was ready to buy the parts. Once your telescope is assembled, drape black woven velveteen around the truss assembly, clipping it with safety pins. We moved the operation to a nearby park and got a focused image of the most distant trees (300-400 yards away) quite easily. a 3/4" thickness. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. The focuser is very smooth. The bearings only need to be So, as they say, "back to the drawing board". together tech enthusiasts, crafters, educators across the globe. Thanks for the great comment. On the cutting diagram, you can see that the side bearings were cut 26 inches long. I've been using the above pair All that remained was to design and print a bracket, and buy the needed parts. on Introduction. Using a compass, I drew lines for the inside and outside of the Ebony Star ring on the top and bottom of the rocker bottom. I had already made a lightweight focuser for 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. Drill a hole and attach the ball head using a shorter 1/4" 20 bolt. I used one of these scrap pieces to draw an angle of 70 degrees to the edge of the arc so that I could later place the teflon pads on the arcs. This unit takes signals from your computer and drives the stepper motor on the focuser. Since my focuser shaft is 6mm, I ordered the coupler shown here in the 6mm to 8mm version from Amazon. I used a hole saw to cut a wooden plug to fit inside the 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.". Wooden Telescope Part 2: Tube and Mount - Instructables Fast forward a few months to the next time I had the tube outside. Subscribe to the premier DIY magazine today, Community access, print, and digital Magazine, and more. This allowed me to cut perfect identical circles. A neet site: http://www.astropix.com/HTML/I_ASTROP/CAMERAS.HTM Cool instructable, Dude! Able to shift heavy loads of kit ie over 1000g. To place the primary mirror, I installed the secondary and installed the primary in the mirror cell. Carve out a hole on the top part of the sonotube first. The core of the telescope, the steel mirror cell holds and adjusts the heavy, curved primary mirror. The cage should be a hollow cylinder about wider than the mirror, with the focuser mounted directly facing the secondary mirror. The Focuser and other items: (Scope Stuff). 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. I have not yet figured out a better way to hold the tube. flexing. It stalled when tension on the belt increased. Download and check them out, I just grabbed the first one and printed it. Step 3The Side Bearings and Rocker Sides. Since these focusers were going side-by-side on a binocular Just as it was about to come into focus, the focuser bottomed out. I was certain not to move the jig at all before cutting the second circle. I had designed the tube box so that there would be an extra inch around the tube. Contact cement is permanent, so the only solution would be to replace the tube! love to hear from people who are interested in this focuser design. The silly colours are mainly due to me experimenting with various clothes dyes in the anodising. Until I see photos of this scope setup for these pictures and an explanation of the exact equipment used, I cannot believe that these pictures were taken with this OTA. The diameter of the focuser is usually indicated in inches. Although they don't usually sell these parts, because I had ordered the mirrors from them they offered to sell me the spider and secondary holder that they use in their scopes. Orient this assembly to allow you to view an object on the far horizon. Your choice here will be recorded for all Make.co Websites. on Step 1, Richards in our local astronomy club. try { Read the documentation though, there are a lot of functions and options. Install on Windows 10, this part is pretty straightforward. Get hands-on with kits, books, and more from the Maker Shed, Skill builder, project tutorials, and more. that is a great website that guy has some fantastic photos. Measure twice, drill Plus it comes in black, so you don't need to paint it (or worry about paint flaking off it). After the second call, I received a response that it would be ready at the end of the following week. I used the "LEDandBuzzer" and "TestStepsDRV8825" tests. An Altitude Azimuth mount would also require a field rotator.There's no way these were taken with an Orion GoTo Mount. Once its cut to length, drill a hole through each end of the tubing with a drill press. Finally, I attached Keepers to the sides of the rocker at the bottom of the arcs using screws and glue. 11 years ago I marked the spot and moved things back inside to install the mirror. Well, it sort of looks like a focuser.. See pictures below. Given any mirror measurements, PLOP will provide the ideal support layout and how much distortion to expect for any number of flotation points. Two such companies would not give me a price because the order of a single tube was too small.

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