on Introduction, Very nice build nikon20. 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. To get a slide-fit in a 3D printed part, you normally make the hole 0.5mm larger than the shaft. experimented with various wires and rods and eventually decided that a 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. 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. Some quick tips to note if you are making a homemade telescope are: 1. 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. on Step 3. With the DRV8825 and Arduino Nano plugged in, the basic board is complete. The rocker sides are each made of two identical pieces of inch plywood glued together, creating two sides one inch thick. 5 weeks after I had ordered the mirror, I called to ask about its status. I wasn't there so i can be 100% but i do not think my friend was lying to me and i believe the pictures are from my telescope my kids use it for stargazing a lot i have seen some deepspace but i use it mainly for sketching the moon and i like to view solar flares. ill ask him for a detailed list of what he used and when i get that ill post it here for you. You simply glue or screw the 'nut' part to your scope OTA, and thread the tube part in/out to focus. There are a number of technical reasons why these photographs could not have come from this Optical Tube Assembly. The motor is much lighter than the geared motor. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. 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. I did run into a small problem with the focuser. A 10 inch scope would not be very much longer or heavier than my 6 inch, yet it would allow me to see much more. I waited until dark and pointed the scope at the sky. Homemade 12.5 Inch Dobsonian Telescope - Instructables Thanks for the great comment. 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. The flat wants to be running parallel to the long axis of the tube. Once your telescope is assembled, drape black woven velveteen around the truss assembly, clipping it with safety pins. document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); To test the concept I used a short piece of two inch PVC for the draw tube. The arc at the top of the sides needed to have a radius 1/8 inch larger than that of the side bearings to account for the thickness of the teflon pads that would fit between. Helical is one of the option i am considering. Inside the OTA is a ring of tightly fitting flocking paper that prevents any light getting in around the drawtube. NEMA-17 Stepper Motor - see below, there are two options. } catch(err) {}, SH-232 Sharpless sh-232, sh-231, sh-233, sh-235, NGC2174 Monkey Head Nebula, Sharpless 252, Sh2-252, HDW3 Hartl-Dengel-Weinberger 3 PN G149.4-09.2, SH-198 Sharpless 198, Soul Nebula, IC1848, NGC281 IC11, Sharpless Sh2-184, Pacman Nebula, SH2-173 SH2-173 Phantom of the Opera LBN 593, SH2-168 Sharpless HII regions. I then ran a bead of glue on the mark, and after it dried I cut out the nylon up to the glue. on Introduction. Knitting needles are I have several of the books on building a Dobsonian Telescope. 10 years ago The little app is simple and works great. Along with some silver bits The project took several months off and on to complete, although a skilled Maker could put a similar one together in a few weeks. The Crayford focuser is a simplified focusing mechanism for amateur astronomical telescopes. Telescope Focusers | Orion Telescopes: Shop A homemade 16 inch dob lightweight telescope, DS-4 - XMission 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. Easy DIY motorized battery free telescope focuser - YouTube The focal length of the mirror is 61 inches. The dimensions of the Tube Box Sides are based on the outer diameter of my tube14 3/16. Secondary mirror with spider holder Search on eBay for a matched set. This allows for a small clearance between the outside of the tube and the inside of the tube box (14 3/8). 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. 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. Dobsonians come in all shapes and sizes, from small 4-8 builds all the way up to massive 24-36 creations. the nylon screws going up from the bottom, but I found the knitting One 6in dob I made was a complete failure. A project collaboration and documentation platform. I think I got what I wanted and seems best solution for me. Just as it was about to come into focus, the focuser bottomed out. 11 years ago an inch or so apart, so the focuser body could be pretty low profile. Edited by Pierre Lemay, 25 May 2020 - 08:10 AM. A neet site: http://www.astropix.com/HTML/I_ASTROP/CAMERAS.HTM Cool instructable, Dude! Brandon Lawler is a hobbyist telescope Maker and an active member of the Central Texas Astronomical Society. Or rather, I hated it. As I understand, you are using it for a refractor. I am well versed in technology, have all the tools necessary to build my own! SDO/HMI Continuum Image on 2023.03.04 at 1259 UT, Remote computer working with no extra networking. The back of the mirror floats on 3 or more support points (this build uses 6) that are calculated usinga software tool called PLOP. I was finishing this inner debate when I got a copy of the book The Dobsonian Telescope by Kriege and Berry as a Christmas gift. (actually, it ended up a smidge more than 2 inches) Lighter than the existing focuser. It took a lot longer than I expected to receive my mirror and other parts from Discovery. It is size 1.25 inch with a clear inside dia-meter. Put it all together a "rubbery" feel. Featured in the February, 2015 issue of Sky & I have already seen some designs on CN, Stellafane and web but still checking if someone has recently made anything simpler. Then it was time to stain and finish. Today I purchased what is called atank nipple in India. 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. 3D Printed Futuristic Space Age Wall Clock, http://www.cloudynights.com/ubbthreads/showthreaded.php?Cat=0&Number=4721255. The premier publication of maker projects, skill-building tutorials, in-depth reviews, and inspirational stories, Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. The cell from Anttler's, for which I had received a refund, had arrived. The current needs to be adjusted on the DRV8825. work really well, for a fraction of the cost of a commercial Crayford The extra force will also PVC pipe makes great drawtubes. Make the hole diameter fairly snug, too. This is the upper tube that contains the flat secondary mirror, Telrad finder, and focuser. "); 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 . A decent machinest will do a far better job, but, there is always a lot more pleasure to be gained per astrophoto when you make bits yourself. Before you do this, the stepper motor will probably move, but it will make a 'stuttering' sound instead of moving smoothly. I carefully cut exactly through the center of each side bearing circle to make my semicircles. think that design would be rigid enough under the weight of a diagonal If you're going for simple, have you considered a helical 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. Share it with us! The pieces were cut down to 15 3/8 and 14 3/8, allowing just under 1/8 inch on each side. My plan for wrapping the tube seemed good, but I am not too pleased with the final result. I tried this one first and found it wouldn't work for my application. I attached keepers 1 inches wide by 5 inches long, extending above the bottom of the arcs by about 1 inches. The version number "312" here may change if Robert posts new firmware. It interfaces to the computer via USB and comes with an ASCOM driver. : "http://www. Orion Telescope Focusers | Buy Direct and Save! It took yet another call a week later for the items to actually be mailed. How to build a 12.5 inch closed tube Dobsonian telescope. Again from the main FILES page, go to "ASCOM DRIVERS" and download everything. But, especially on cold evenings, the focus may go out in the middle of the night. 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. They're fairly There are sub-folders for the different versions. 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. Please explain, in detail, how you attached your tube to the very unique drive system of an XT12G mount. Once I decided to build a scope myself I had to decide on the aperture of the scope. 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. I took the whole tube assembly outside. I have not yet figured out a better way to hold the tube. and an eyepiece. Or in my case, back to SolidWorks :-). forward and back along with the drawtube when you focus, and you'll get This is the first telescope that I have built. 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. the drive shaft close against the drawtube. 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. When you want to focus, you just open the program and press focus. This sure is going to be a project I will work on. on Step 5. love to hear from people who are interested in this focuser design. I'm' glad I did, because I didn't like the first color that I had chosen. Im quite happy with the result, and the view in its large mirror is phenomenal. My newtonian telescope, like most others, came fitted with a nasty rack and pinion focuser. A For a while I decided that 10 inch would be the best size. I had nearly completed the base and put things together for the first time. This means you lose much of the night's images. You will need to order one sized for your telescope's focuser shaft size. A 6 in primary mirror does not have enough weight to make the dob stable. It wouldn't be a two-speed design, but if I used a thin enough 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. The blue pieces of the rocker box and ground board are arranged as in the diagrams in (figure 2). 8 years ago Make sure the shroud can slip on and off of the assembled scope, and that it stretches along the circumference (not lengthwise). This resulted in a gear that wasn't true and "wobbled" a bit. Robert is a super guy and more than willing to help those who choose to follow in his footsteps. I redrilled the holes for the mirror cell and got ready to wrap it. I am using scrap upvc pipe material. Position "0" is with the focuser all the way IN (at least for a refractor). Two different construction supply companies told me that sonotubes were not available with a 14 inch diameter, even by special order. 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 wide square footprint would make it pretty stable when mounted to $299.99 More About Telescope Focusers I marked the spot and moved things back inside to install the mirror. Fairly easy to build and could be adapted to suit any SCT focuser. I wanted the long focal length for good contrast. The sides were attached with wood glue and clamps with a few small brads to hold everything in place. I also doubled the thickness of the rocker sides (not the front wall) to provide better support for the heavier tube. I was concerned that it would be difficult to find, but I was able to order it from a local woodworking shop. Lining up this center point with the center of the top of the side bearing, I brought the corner of the side bearing up to the edge of the tube box and attached it with screws. The curved sides of the Side Bearings are also covered with strips of Ebony Star that glide on the teflon pads on the curved edges of the Rocker Sides (figure 3). 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. Drawing lines between opposite corners of the tube box sides allowed me to locate the center point on each side. 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. Slide the eyepiece into the focuser and try it out. Did you make this project? Star Adventurer Pro Pack Counter Weight Bar Thumb Screw Upgrade. In addition, we use third-party cookies to help us analyze and understand usage. The heaviest piece is 40 lbs, and the total scope weighs about 60 lbs (not counting the baffle). His passion is using CAD design and his homemade CNC router to bring large wood projects to life. can't click on it or copy and paste it; it's a graphic file to thwart with a genuine question or comment about the design. I then attached the Ebony Star ring using contact cement. Reply Just drill holes in both ends and mount the lenses. Instead of the rack and pinion, they have a smooth spring-loaded shaft which holds the focus tube against four opposing bearing surfaces, and controls its movement.
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