homemade telescope focuser

I Hope to give you ideas if you are thinking about building one for yourself! Membership connects and supports the people and projects that shape our future and supports the learning Similar photos at http://www.telescopegeek.com/gallery.htm require 100+ minute exposure times on his 20" telescope and $3200 camera. A Pocket Sundial From a Broken Pocket Watch! 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. an eyepiece. crafts, science & engineering, design, and technology. The sides were attached with wood glue and clamps with a few small brads to hold everything in place. I welded mine from steel square tubing. Able to make myself using my own humble tools (or toys as the pros will call them!) Thicker knitting needles would be even After researching several possible sources for a primary mirror, I decided to order an f/5 12.5 inch mirror from Discovery Optics. 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. curated by us, the people behind Make: and the Maker Faire. Participated in the Celestron Space Challenge. Tom's Homemade Telescope Page - 14 inch dob - Google 11 years ago I used one of the top scraps from the rocker sides to mark an angle of 70 degrees from the center of the arc to the curved cut in order to properly space 1 X 7/8 teflon pads on the arcs. Able to make myself using my own humble tools (or toys as the pros will call them!). After the second call, I received a response that it would be ready at the end of the following week. My newtonian telescope, like most others, came fitted with a nasty rack and pinion focuser. The little app is simple and works great. Make the hole diameter fairly snug, too. Fire up focusmax, and shoot some images! I'm' glad I did, because I didn't like the first color that I had chosen. The Crayford focuser is a simplified focusing mechanism for amateur astronomical telescopes. Here is what I was working on but looks like I need a better design. I told them to take their time and get it right. DIY focuser design - ATM, Optics and DIY Forum - Cloudy Nights I was annoyed to have made the mistake, but very glad that I checked the position on stars before wrapping the tube in veneer. The project creator Robert Brown made a good video on testing the board. I made this Crayford style focuser using plywood scraps and surplus bearings. Given that you can make the drawtube any length you For a while I decided that 10 inch would be the best size. If you're going for simple, have you considered a helical focuser? Fairly easy to build and could be adapted to suit any SCT focuser. After another 3 weeks, I was concerned that I had not received the mirror. This means I can use FocusMax to do the focusing. Share it with us! I did run into a small problem with the focuser. It would cost less and they have a very good reputation. That's pretty much the focuser. We moved the operation to a nearby park and got a focused image of the most distant trees (300-400 yards away) quite easily. So, for my telescope I used a 6mm to 5mm coupler available on Amazon. 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. 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. on Step 5, After much debit and doubt i have taken the photos down cause i cannot be 100% sure that they were taking from my scope as i was not there to verify them and i do not want my contest entry to be based on photos and not the build process. On the cutting diagram, you can see that the side bearings were cut 26 inches long. If the telescope rotates forward or backward on its own, then the mirror box is too deep or too shallow. For my project I needed a 14 inch diameter, and I had a tough time finding one. can't click on it or copy and paste it; it's a graphic file to thwart This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". Primary telescope mirror aftermarket, homemade, or custom-made. Here is a link to the main FILES area on Robert Brown's site. 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. Homemade DIY focuser for telescope with computer control - NEUTRAL.org Several functions may not work. I described it two years ago in this thread:https://www.cloudyniuser/?p=8879835 . 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. Having an RS trade counter 2 miles away is such a luxury! After another 3 weeks, I was concerned that I had not received the mirror. If you're not using heavy eyepieces, you probably don't need For about $3 we can buy a tank valve kit that has a threaded 2" i.d. 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. This extra space would allow the tube to be repositioned within the tube box to rotate the eyepiece or balance the tube. Connect the Arduino USB cable and upload some test sketches. Please re-enable javascript to access full functionality. The drawings are only approximately to scale. PhotoPictureResizer_190723_214534574_crop_2558x3105_copy_1023x1242.jpg. 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. Edited by Pierre Lemay, 25 May 2020 - 08:10 AM. I also doubled the thickness of the rocker sides (not the front wall) to provide better support for the heavier tube. Those are the last screws to be tightened. Download and check them out, I just grabbed the first one and printed it. Low, or Zero slop when changing direction. Crayford focusers are considered superior to entry-level rack and pinion (actually, it ended up a smidge more than 2 inches) Lighter than the existing focuser. Thicker walls also required thicker side bearings so that the outside of the bearings would line up with the outside of the rocker sides. I didn't receive any confirmation email after a few days, so I tried to send them an email. 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. 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. This one is based on the DRV8825 driver chip and a NEMA-17 stepper motor. If you look in the FILES area on Robert Brown's site (see link above) you will see a sub-folder "3D Printed Parts". 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. Rock on! Before attaching the sides and front to the bottom with wood screws, I wanted to make sure those screws would not interfere with the Ebony Star ring that would be attached to the rocker bottom. These will be stored in your browser only with your consent and you have the option to opt-out. I did not wrap the tube until I had completed the base. larger diameter. The bearings only need to be The next day, I called back to ask their opinion about the kind of spider and secondary holder to order. Once you get it working, there's some calibration you need to do. The 48 inch width of the veneer was close enough to the diameter of the tube that I used it as is. The focuser 'knob' on the Celestron is just a rubber sleeve that usually pulls off easily. More Homemade Refractor Telescope DIY Erecting Prism Binoviewer Focuser here: Did you make this project? We are now ready for some testing. I marked the expected position of the secondary by measuring 61 inches down from the end of the tube. it sticks into your light path. Yet I was also becoming infected with aperture fever. The secondary holder is adjustable, so I could didn't have to get the location perfect. 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. 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. I also have an extended photographic build diary of this telescope posted on Imgur. 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 would love to see your build when you are finished with it . document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); This proved fatal for the stepper motor! This is the kind of simple off the shelf design I was looking for. As it turned out, the mirror cell was too large to fit into my 14 inch sonotube. Since my focuser shaft is 6mm, I ordered the coupler shown here in the 6mm to 8mm version from Amazon. This consists of a small black box of electronics. Some quick tips to note if you are making a homemade telescope are: 1. Dozens of projects in every issue covering electronics, craft, fabrication, and more, Learn tips and skill-building tutorials from experts in the maker community. I called in the order and explained that I would be using a mirror two inches thick. 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. But let me see what items I can arrange to make a helical. This is the upper tube that contains the flat secondary mirror, Telrad finder, and focuser. var gaJsHost = (("https:" == document.location.protocol) ? once. More commercial crayford focusers are of a more enclosed form, whereas mine is more "open frame" approach. It had been described by many as the most important recent volume for anyone planning to build a dob, and I have to agree. Part numbers 351-4574 and 336-422. During on-site assembly, attach each truss to its mounting T-nut using a bolt with a thumbscrew knob. small, it's surprisingly rigid. 5 weeks after I had ordered the mirror, I called to ask about its status. Thanks Pinbout for sharing your design. Sonotube (14 inch diameter, 12 feet long): $70, Focuser (GSO 2 speed low profile Crayford): $139, Total cost for supplies for this project: $1700. I gave them a call and they said they had one on the shelf14 inches in diameter and 12 feet long! Brandon Lawler is a hobbyist telescope Maker and an active member of the Central Texas Astronomical Society. Before I wrapped the tube (and before I discovered the problem with the primary placement) I determined the balance point on the tube. Position "0" is with the focuser all the way IN (at least for a refractor). My DIY Motorized Telescope Focuser - YouTube 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.

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