homemade telescope focuser

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. 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. This is the mirror box for my 16", with Jim doing a bit of cleanup sanding. Connect the Arduino USB cable and upload some test sketches. I decided to order an aluminum mirror cell from University Optics instead so that the mirror could be supported at 9 different points. I was annoyed to have made the mistake, but very glad that I checked the position on stars before wrapping the tube in veneer. Thanks for your article. I would also like to know about how you can take such fantastic pictures without a field rotator and an autoguider system. This consists of a small black box of electronics. a "rubbery" feel. Not sure if it is available in the USA. I described it two years ago in this thread:https://www.cloudyniuser/?p=8879835 . See the images how I plan to assemble it. Once I decided to build a scope myself I had to decide on the aperture of the scope. But, like many of you I'm sure, the biggest reason I'm doing this is for the pure geeky fun of it! flexing. The version number "312" here may change if Robert posts new firmware. a try. 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. When I ordered the cell, I paid through paypal, which immediately deducts money from my checking account. 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. Orion Telescope Focusers | Buy Direct and Save! I have several of the books on building a Dobsonian Telescope. I found a used 16 primary on eBay. The premier publication of maker projects, skill-building tutorials, in-depth reviews, and inspirational stories, 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. how much travel you actually need, you can cut the tube off so none of Building Your Second Homemade Telescope - Part 1 - HubPages 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. The focuser 'knob' on the Celestron is just a rubber sleeve that usually pulls off easily. That's pretty much the focuser. You currently have javascript disabled. Make sure the shroud can slip on and off of the assembled scope, and that it stretches along the circumference (not lengthwise). A wide hole will let the knitting needle creep I told them to take their time and get it right. he might just have a $3200 camera, they aren't very hard to come by. Remember: It is the quality and SIZE of the capture chip, NOT the megapixels that determines quality. I'd be willing to bet that you could easily grind your own 12.5 inch next time and save some $$. knob, and a drill press to make sure the hole for the knitting needle Featured in the February, 2015 issue of Sky & Keeping with the 'simple ' part of your request, here is a helical 2"/1.25" focuser made from std plumbing parts. by cranking 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 lumber yard also gave me a lower price than I expected. This makes for better sky photographs as the exposure time can be lengthened,. The belt and pulleys are off-the-shelf items available on Amazon. I made this Crayford style focuser using plywood scraps and surplus bearings. Overall, I'm very happy with the outcome of this project - focusing is now a joy. But let me see what items I can arrange to make a helical. Telescope Focusers | Orion Telescopes: Shop Wooden Telescope Part 2: Tube and Mount - Instructables 1/4" x 20 bolt, and the nylon bolt end against the smooth knitting Knitting needles are adapter set screws to slide into. The wide square footprint would make it pretty stable when mounted to . Focuser (GSO 2 speed low profile Crayford): $139 Ebony star strips: 2 @ $10 Ebony star ring: $59 Teflon strip: $11 Telrad base: $10 Baltic Birch " sheet (60X60): $42 Baltic Birch 5/8" sheet (60X60): $48 Circle cutting jig: $30 Birch Veneer (4X8 piece): $65 Hardware, stain, other supplies: $80 Total cost for supplies for this project: $1700 100A81BF-2145-44D5-BC76-66DBF43BAD58.jpeg. To test the concept I used a short piece of two inch PVC for the draw tube. 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. I'm' glad I did, because I didn't like the first color that I had chosen. So, as they say, "back to the drawing board". (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.) Easy DIY motorized battery free telescope focuser - YouTube How to make diy focuser pvc - YouTube Membership connects and supports the people and projects that shape our future and supports the learning knitting needle where it goes through the hole, so it's not a big deal, the bearings, totally eliminating any flex. Two such companies would not give me a price because the order of a single tube was too small. Homemade DIY focuser for telescope with computer control - NEUTRAL.org Tom's Homemade Telescope Page - Issac Newton Scope - Google We were careful to press out any bubbles as we went, but when the job was done we found that there were multiple bubbles in the veneer. guarantee a response, but I'll do my best to answer everyone who writes This means you lose much of the night's images. Look down through the empty focuser. Also no obvious diffraction spikes in the m31 photo. It seems to As the telescope tilts toward the horizon, the mirror must be supported on its edge. I had some carboy caps that make good knobs. I used the "LEDandBuzzer" and "TestStepsDRV8825" tests. $299.99 More About Telescope Focusers Brandon Lawler is a hobbyist telescope Maker and an active member of the Central Texas Astronomical Society. 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. needle adds no friction that I can feel to the focus action. I took the whole tube assembly outside. Did you make this project? I had nearly completed the base and put things together for the first time. A Pocket Sundial From a Broken Pocket Watch! The sides were attached with wood glue and clamps with a few small brads to hold everything in place. If you're not using heavy eyepieces, you probably don't need In amateur astrophotography, we run our telescopes overnight. This design could be adapted to practically any telescope or focuser, so I've kept my outline on the project brief. Our websites use cookies to improve your browsing experience. Another thing, the resolution on the Dumbell nebula seems a bit too high for that telescope. In the sub-folder "Cases" you will see many variants of the case for the DRV8825 based focusers. I wanted to wrap the tube in veneer because I had seen a homemade telescope on a website that used veneer and I liked the look. 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. I wanted a tight / press fit, so I only added half that, 0.25mm. When they arrived, they were beautifully and carefully packaged with the secondary already installed in its holder. Nice looking telescope. They said they would make the brackets extra long to accommodate the mirror and it would take about a week. After a few weeks of no communication from them, no ability to phone or email them, and no mirror cell arriving. Put it all together 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. It turned out that they had an incorrect zip code and the package was still waiting to be sent. 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. 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. I applied contact cement to the first inch of the veneer and the mating inch of the tube. installations. It took yet another call a week later for the items to actually be mailed. The Dob is really a great design. Be creative! For complete instructions on building a telescope such as this one, I strongly recommend buying a copy of The Dobsonian Telescope by David Kriege and Richard Berry. Realizing that it could not be the University Optics cell already, I thought, Noit couldn't be but, in fact, it was. Use mild soap and distilled . 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. ScopeStuff is awesome!! I tried this one first and found it wouldn't work for my application. The basic points I wanted to cover: What did I end up with? 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. I paid the 50% deposit and dreamed of DSOs. 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. accessible by all ages and skill ranges. Pretty dry but important! on Introduction. Dobsonian telescopes are popular with amateur telescope makers for their ease of design and construction, portability, and their use of large optical mirrors. the nylon screws going up from the bottom, but I found the knitting Thanks Bob. 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 spider, or secondary mirror holder, will suspend the mirror in the optical path in order to direct light into the focuser. Finally, I attached Keepers to the sides of the rocker at the bottom of the arcs using screws and glue. I ordered the focuser, received an immediate email confirming the order, and it arrived two days later. I had cut the 12 foot tube in half in order to get it home in the first place, and a 6 foot section was the right size to work with for my f/5 12.5 inch. A project collaboration and documentation platform. Now I can simply insert the PVC cap on the end of a 4" pvc tube. I had initially allowed for more of a gap, but realized once I cut the pieces and held the tube inside them that my gap was too large. As the authors describe the benefits of a truss design, it is hard to dispute their arguments. 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. A week later the cell arrived (on schedule) from University Optics. These will be stored in your browser only with your consent and you have the option to opt-out. Orient this assembly to allow you to view an object on the far horizon. (I didn't have the primary mirror yet). love to hear from people who are interested in this focuser design. Before I wrapped the tube (and before I discovered the problem with the primary placement) I determined the balance point on the tube. I found out pretty quickly that building my own telescope would only be a bargain if I made my own mirror and mechanical parts. "); Easy DIY motorized battery free telescope focuser - YouTube Some quick tips to note if you are making a homemade telescope are: 1. Did you make this project? 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 will get good 30-40 mm focusing range. Secondary mirror with spider holder Search on eBay for a matched set. Crayford-style design with four bearings and one driveshaft. Slide the eyepiece into the focuser and try it out. microcontrollers including Arduino and Raspberry Pi, Drones and 3D Printing, and more. Measure the diameter of the exposed shaft. The cost is a bit more than some of the other combinations, but by only $10 or $20. I particularly like that the design can be integrated directly into the focuser board to make a very, very simple UTA. Helicals are adaptable to both refractors and reflectors, but do not "play nice" with zoom eyepieces because "zooming" becomes a two handed operation to avoid changing focus. The Focuser and other items: (Scope Stuff). I plan to use an FTA over it in case an extension is needed. 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. I read the entire thread and surely its going to help me building my focuser. A celebration of the Maker Movement, a family-friendly showcase of invention and creativity that gathers I do have another tube that can be used around the drawtube, but it doesn't really add anything. It doesn't. A tilted focuser will have no effect on the image quality. This extra space would allow the tube to be repositioned within the tube box to rotate the eyepiece or balance 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.

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