Save over 40% off the annual cover price for a full year (4 issues) of Make. I have not yet figured out a better way to hold the tube. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. Measure twice, drill I have already seen some designs on CN, Stellafane and web but still checking if someone has recently made anything simpler. 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. together tech enthusiasts, crafters, educators across the globe. Here we see the following components installed: Notice we are NOT populating the parts of the board intended for Wifi or BLED. 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. His project is very well documented. Post 10 of the same LSDF focuser thread also links to Art Bianconi's archived 2008 original flush valve focuser posts. Some of these are essential for the basic functionalities of our websites. Tips If you've got a 1.25 inch focuser, You can also use it for an objective. the bearings right at the edge of the frame, reducing the frame to 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. Your design is simple and nice. Step 4Attaching the Side Bearings and assembling the Rocker. I suspected that the company was either in trouble or no longer in business. As it turned out, the mirror cell was too large to fit into my 14 inch sonotube. Orion Dynamo Mini for powering a Nexstar 6SE? that is a great website that guy has some fantastic photos. The version number "312" here may change if Robert posts new firmware. Thanks Bob. Another vote for Pierre's helical Crayford design. 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. I set things up in daylight and collimated the scope. 3D Printed Futuristic Space Age Wall Clock, http://www.cloudynights.com/ubbthreads/showthreaded.php?Cat=0&Number=4721255. Tom's Homemade Telescope Page - Issac Newton Scope - Google The plate has slotted screw holes for tensioning the 6mm belt. Fairly easy to build and could be adapted to suit any SCT focuser. So I decided to make my own, using my normal "blunder in naively and see what happens" approach to making things. he might just have a $3200 camera, they aren't very hard to come by. forward and back along with the drawtube when you focus, and you'll get A Pocket Sundial From a Broken Pocket Watch! 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. During assembly, youll attach the trusses to the mirror box, then sit the secondary cage on top and bolt everything in place. 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 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. Also, I will work with my computer geek buddies, so that we eventually automate it using Linux on a Rock64, to run kstars for tracking, on INDI. Homemade 12.5 Inch Dobsonian Telescope - Instructables on Introduction. I applied contact cement to the first inch of the veneer and the mating inch of the tube. a try. It took about 3 weeks but, since Anttler's did not even reply to the Paypal dispute, I received a Paypal refund. The current needs to be adjusted on the DRV8825. exactly 2" with adhesive labels placed one at a time inside the tube help eliminate slippage when the focuser is pointed straight upward. As the telescope tilts toward the horizon, the mirror must be supported on its edge. Thanks for your article. a "rubbery" feel. Meade Zero Image-Shift Electronic Micro-Focuser This high precision focuser allows you to obtain an extremely accurate image focus. Shorter thread side will be used to attach the eyepiece. If you go to buy all of the components for this project from dealers, you will see that you mostly have to buy at least 5 parts, sometimes bags of 50 parts! This is where you will use screws to strongly attach the focuser onto the tube. the drive shaft close against the drawtube. This scope was originally made as a travel scope using an eight inch mirror that I ground and polished at the St Pete Astronomy Clubs Mirror Lab. narrow the frame. Two of the holes for the bolts were blocked by knobs. The focuser shaft on the telescope is 13.1mm in diameter. Your astrophotographer friend may have included his own images from his setup. needle so the knitting needle will be snug against the drawtube without "); 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. The Crayford focuser is a simplified focusing mechanism for amateur astronomical telescopes. I wanted the long focal length for good contrast. This motor is available on Amazon. I even began taking careful notes about needed supplies and plans for each piece of the truss tube scope. The company has a reputation for excellent optics, and it was neither the most expensive, nor the least. Crayford-style design with four bearings and one driveshaft. DIY focuser design - ATM, Optics and DIY Forum - Cloudy Nights 100A81BF-2145-44D5-BC76-66DBF43BAD58.jpeg. Next, attach the eyepiece and the focuser to the top part of the telescope tube. scope, I only put knobs on the outsides. I am well versed in technology, have all the tools necessary to build my own! Ask Question Step 5: Stepper Motor Choice #2 - NEMA-17 Geared Stepper Motor If your optical train is heavy and the focuser has to bear it (see above) then this motor may be a better choice. Thin 1/16 Kydex plastic should be cut to length to line the inside of the cage as a baffle to block outside light. Thanks again for the 'ible. can't click on it or copy and paste it; it's a graphic file to thwart 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. Tom's Homemade Telescope Page - DIY Craford Focuser - Google 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. focusers for that project. Use mild soap and distilled . on my binocular scope for quite a while now and really like them. To hold the tube in place within the tube box, I used a combination of pieces of felt inside the box and wooden shims between the tube and the box. In my build, the minimum eyepiece-to-secondary mirror distance (13) plus the primary-to-secondary mirror distance (57) equals the focal length of 71, which is roughly 4.5 times the width of the 16 mirror. I also wanted to strengthen and protect the cardboard tube. Crayford focusers are considered superior to entry-level rack and pinion focusers, normally found in this type of device. It was easy enough to drill a hole and tap threads for a This makes for better sky photographs as the exposure time can be lengthened,. I ordered the focuser, received an immediate email confirming the order, and it arrived two days later. My guess is that photo was taken with a refractor. See the images how I plan to assemble it. 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. 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. Or rather, I hated it. 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. I called to express my concern and was told that it had all been packaged a few weeks ago and that it, For complete instructions on building a telescope such as this one, I strongly recommend buying a copy of, After cutting the circles for the side bearings, I set up the jig to cut the curved edges of the rocker sides. Thanks for the great comment. DIY Remote Telescope Focuser - YouTube In my build, the cage was cut on a CNC router from plywood, with threaded T-nuts added to support a truss assembly. I made a similar helical focuser with a nice 2 inch thing I found in Classifieds. I think I got what I wanted and seems best solution for me. 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. It may take you a while to adjust the image correctly, but it's not hard to do, just time consuming. The overall project is super cheap, we're building this thing for something like $50 in materials. I installed the spider first, about one inch down from the end of the square end of the tube. Given that you can make the drawtube any length you Get hands-on with kits, books, and more from the Maker Shed, Skill builder, project tutorials, and more. var gaJsHost = (("https:" == document.location.protocol) ? until a 2" eyepiece or 1.25" adapter is snug. We moved the operation to a nearby park and got a focused image of the most distant trees (300-400 yards away) quite easily. When you figure out 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. love to hear from people who are interested in this focuser design. You need some purple bits Start with the small components first. Let me see if I can get similar plumbing parts here. Other supplies that I bought for this project include wood, various bits of hardware, stain and finishing supplies, and a circle cutting jig for a router. It has become an indispensable piece of equipment for me that so beats hacking and filing PVC pipes etc. Just to make sure I liked the stain, I applied some to a piece of scrap wood. Share a cool tool or product with the community. 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. How to make diy focuser pvc - YouTube The project took several months off and on to complete, although a skilled Maker could put a similar one together in a few weeks. 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.
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