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 phoned in the order in the last week of February and was told that it would take about 4 weeks to deliver the mirror. I had some carboy caps that make good knobs. I ordered the focuser, received an immediate email confirming the order, and it arrived two days later. needle so the knitting needle will be snug against the drawtube without And for those who like to work with 3D printers, both the single speed and dual-speed versions could easily be printed. I suspected that the company was either in trouble or no longer in business. All i did was supply the telescope as far as his camera equipment i dont know what he used i never saw it all i know is he had my scope for about a month while i was traveling and he gave me these photos. 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. So, for my telescope I used a 6mm to 5mm coupler available on Amazon. Electronics and software automate the process of taking pictures. Please feel free to email me at the address on the right. The sides were attached with wood glue and clamps with a few small brads to hold everything in place. I built mine entirely from CNC-cut plywood, and fastened it together with 2 bolts. SDO/HMI Continuum Image on 2023.03.04 at 1259 UT, Remote computer working with no extra networking. I want to make this direct drive system work. There are some test sketches in the "Tests" folder, start with those. 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. The specific hardware used for this is described on the Building page. too far. Next, attach the eyepiece and the focuser to the top part of the telescope tube. in the tube so they'll hit the knitting needle before your drawtube runs I do it with aluminium alloy, aluminium tube and nice work. Knitting needles are But, especially on cold evenings, the focus may go out in the middle of the night. At their suggestion, I also ordered a 2.6 inch secondary mirror. I had chosen a boxy, rigid design for the binocular scope, so If the telescope rotates forward or backward on its own, then the mirror box is too deep or too shallow. I then attached the Ebony Star ring using contact cement. The company has a reputation for excellent optics, and it was neither the most expensive, nor the least. Very simple and portable. I decided to order an aluminum mirror cell from University Optics instead so that the mirror could be supported at 9 different points. an inch or so apart, so the focuser body could be pretty low profile. With adapters for any Meade 1x200-ACF or LS model, and chord to plug into focuser port. 1/4" x 20 bolt, and the nylon bolt end against the smooth knitting The project creator Robert Brown made a good video on testing the board. 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. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. I started with a spacer that with a inch outer diameter. 5 weeks after I had ordered the mirror, I called to ask about its status. I don't have the skills to build a focuser using a. I've been using the above pair I also decided to make a separate mounting plate for the stepper motor, since I figured aligning the shafts precisely would be all but impossible. Save over 40% off the annual cover price for a full year (4 issues) of Make. 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. Subscribe to the premier DIY magazine today, Community access, print, and digital Magazine, and more. curated by us, the people behind Make: and the Maker Faire. I had installed the mirror about an inch too far away from the focuser. I then ran a bead of glue on the mark, and after it dried I cut out the nylon up to the glue. and an eyepiece. The email bounced back to me. Download and unzip. Your choice here will be recorded for all Make.co Websites. Two inch internal diameter drawtube. Dozens of projects in every issue covering electronics, craft, fabrication, and more, Learn tips and skill-building tutorials from experts in the maker community. Edited by howardcano, 24 May 2020 - 09:29 PM. Un-real!!! As it turned out, the mirror cell was too large to fit into my 14 inch sonotube. I first tried my 32mm plossl eyepiece. While I will freely admit that most astro-photography is WAY beyond me, you certainly do NOT need a $3200 camera to do so. Primary telescope mirror aftermarket, homemade, or custom-made. That helps with low-profile Picture of DS-4. surfaces to put the bearings in and a vee at the bottom that would hold Carve out a hole on the top part of the sonotube first. I wanted to finish that instructable before the contest ended but was too late :-). Concluding that I would not be able to buy a tube off the shelf, I found a couple of companies that took special orders on cardboard tubes. If you're not familiar with Arduino, watch some tutorial videos. Since my focuser shaft is 6mm, I ordered the coupler shown here in the 6mm to 8mm version from Amazon. DIY Craford Focuser. The diameter of the focuser is usually indicated in inches. by cranking Finally it was etched in caustic soda, and anodised matt black. love to hear from people who are interested in this focuser design. DIY Remote Telescope Focuser - YouTube I tried this one first and found it wouldn't work for my application. Pierre Lemay, thanks for sharing your simple and incredible design. You should watch (and bookmark) this video. I had the thought that as long as I was going to build it I should build it as big as I could afford. Or rather, I hated it. Use the externalMirror Edge Support Calculatorto decide whether to use a two-point, four-point (whiffletree), or sling support. Robert Brown did an excellent video on how to work out your stepper motor requirements. Featured in the February, 2015 issue of Sky & Not sure if it is available in the USA. This motor has a larger shaft diameter (8mm) and is quite a bit heavier overall than the direct drive motor, mainly because of the gearbox. I tried all of my other eyepieces and found that I could bring the image into focus in the other eyepieces, but it was very near the bottom of the focuser travel. accessible by all ages and skill ranges. 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. 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 But I wanted a larger mirror, and, at that size, grinding my own was not an option. After cutting the circles for the side bearings, I set up the jig to cut the curved edges of the rocker sides. on Step 1, Richards in our local astronomy club. 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. This design could be adapted to practically any telescope or focuser, so I've kept my outline on the project brief. If you're not using heavy eyepieces, you probably don't need Post 10 of the same LSDF focuser thread also links to Art Bianconi's archived 2008 original flush valve focuser posts. 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. When you're ready to go on to testing with the windows driver, you want "myFP2_DRV8825_312-1", open that folder. 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. I gave them a call and they said they had one on the shelf14 inches in diameter and 12 feet long! Their step by step instructions were invaluable to me as I built this scope. After researching several possible sources for a primary mirror, I decided to order an f/5 12.5 inch mirror from Discovery Optics. While I applaud your building of a homemade Dob, (giving you the FULL benefit of the doubt here) your "friend" has provided photographs that make it look like you're trying to win by cheating. I welded mine from steel square tubing. Here we see the following components installed: Notice we are NOT populating the parts of the board intended for Wifi or BLED. A Find a special something for the makers in your life. Put it all together experimented with various wires and rods and eventually decided that a I marked the expected position of the secondary by measuring 61 inches down from the end of the tube. adapter set screws to slide into. I was annoyed to have made the mistake, but very glad that I checked the position on stars before wrapping the tube in veneer. I will post the pic of final focuser once ready. Someone is pulling someone's leg here. 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. I Share a cool tool or product with the community. I found out pretty quickly that building my own telescope would only be a bargain if I made my own mirror and mechanical parts. I particularly like that the design can be integrated directly into the focuser board to make a very, very simple UTA. Homage to Homemade Crayford Focusers - Cloudy Nights Several clamps were used to hold the pieces together overnight. I wanted the long focal length for good contrast. I decided to keep this tube for now and if I run into problems with it, I can replace it later. A homemade 16 inch dob lightweight telescope, DS-4 - XMission (actually, it ended up a smidge more than 2 inches) Lighter than the existing focuser. The telescopes size is classified by the size of its mirror. After you've done that, put a couple of tiny pan-head screws Nice looking telescope. I placed my telrad, optical finder, and an eyepiece on the focuser end of the tube and, using a broomstick as a balance point, found that the tube balanced 22 inches from the bottom. Newton, and others including James Gregory and Laurent Cassegrain, believed that a reflecting telescope would not be affected by the chromatic aberration that affected . All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . Meade Zero Image-Shift Electronic Micro-Focuser This high precision focuser allows you to obtain an extremely accurate image focus. Thin-wall aluminum tubing is used to attach the mirror box to the secondary cage. A 6 in primary mirror does not have enough weight to make the dob stable. DIY Electric Focuser - ATM, Optics and DIY Forum - Cloudy Nights var pageTracker = _gat._getTracker("UA-1008534-4"); 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. When I looked at the costs, I seriously considered buying an Orion telescope instead of building my own. Most people will want a knob on I was concerned that it would be difficult to find, but I was able to order it from a local woodworking shop. This motor is available on Amazon. 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. 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. 1N5408 3A Diode (you may need to make the pins smaller to fit through the holes in the board. That is dirt cheap compared to the cost of commercially available focusers, which can top $1000 and are much heavier than what we will build. The focuser 'knob' on the Celestron is just a rubber sleeve that usually pulls off easily. So, as they say, "back to the drawing board". The side bearings are each made from 2 identical semicircles of 5/8 inch plywood glued together to make a thickness of 1 inches. . And you can tell it's not a mosaic because the stars at the corners show coma/field curvature artifacts. Use mild soap and distilled . Since my plan called for purchasing the mirrors and mechanical parts there were several decisions to be made and several vendors to contact. It doesn't. A tilted focuser will have no effect on the image quality. This allowed me to cut perfect identical circles. The Focuser and other items: (Scope Stuff). I also figured that the extra expense was worth it, considering the amount of money I was investing in the project overall. Total cost for supplies for this project: It took a lot longer than I expected to receive my mirror and other parts from Discovery. Get hands-on with kits, books, and more from the Maker Shed, Skill builder, project tutorials, and more. Thanks again for the 'ible. Thicker walls also required thicker side bearings so that the outside of the bearings would line up with the outside of the rocker sides. Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. This cost around $100 to build and all of the components came from. 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. Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. on Step 1, interesting build, its just like my old Odyssey brand scope from the mid 1990's. Perfect for astrophotography or during high power planetary observation. There are a number of technical reasons why these photographs could not have come from this Optical Tube Assembly. The mount and tripod are pretty much useless for astrophotography. 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. stronger, but would give me a coarser focus action because of their Telescope Focusers | Orion Telescopes: Shop The Crayford focuser is a simplified focusing mechanism for amateur astronomical telescopes. You will look through these as you rotate the wheel. (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.) DIY Truss Dob input: How to design truss? Most of these have one or two set screws. Able to make myself using my own humble tools (or toys as the pros will call them!) Depending on your telescope, one of the Brackets that Robert has may work for you. Given any mirror measurements, PLOP will provide the ideal support layout and how much distortion to expect for any number of flotation points. weight. This sure is going to be a project I will work on. Thicker knitting needles would be even 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. Drill the holes for the knitting Crayford focusers are considered superior to entry-level rack and pinion focusers, normally found in this type of device. Page 1 of 2 - DIY focuser design - posted in ATM, Optics and DIY Forum: Hi I am working on a diy focuser design for my 6 F/8 telescope and asking suggestions for simple focuser. This resulted in a gear that wasn't true and "wobbled" a bit. Secondary mirror with spider holder Search on eBay for a matched set. I used a hole saw to cut a wooden plug to fit inside the Able to shift heavy loads of kit ie over 1000g. 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. To get this arc, I actually moved the radius of the jig, At some point in the building process, my goal became to finish the scope by RocheStar Fest, an annual event of the. 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. 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. Tom's Homemade Telescope Page - 14 inch dob - Google For a while I decided that 10 inch would be the best size. The pieces were cut down to 15 3/8 and 14 3/8, allowing just under 1/8 inch on each side. Share it with us! I attached three feet equally spaced on top of the ring, and on the opposite side attached teflon pads 1 X 1 directly above the feet using very small brads and countersinking the brads below the surface of the teflon. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. Make the hole diameter fairly snug, too. A Pocket Sundial From a Broken Pocket Watch! Coupler for NEMA-17 Stepper Motor (also two choices, see below), LM7808 Voltage Regulator with TO-220 package -, Mini On/Off 3-pin 2-position slide switch -, Headers and wire (miscellaneous sizes and gauges), these are important so you can replace the component if it is damaged, LM7808 voltage regulator w/TO-220 heat sink package, 2-pin headers for 12V power and on/off switch.

Norse Goddess Ran Symbols, Sweet And Sour Hot Dogs With Grape Jelly, Frases De Recuperacion De Salud Cristianas, Articles H