homemade telescope focuser

My plan for wrapping the tube seemed good, but I am not too pleased with the final result. You can see that my Moonlite focuser was slightly larger than the sides of the tube. 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. To get a slide-fit in a 3D printed part, you normally make the hole 0.5mm larger than the shaft. 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. 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. A free program that lights childrens creative fires and allows them to explore projects in areas such as arts & All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . ScopeStuff is awesome!! I welded mine from steel square tubing. Dobsonians come in all shapes and sizes, from small 4-8 builds all the way up to massive 24-36 creations. It's rigid, lightweight, and This might have been tempting if I wanted to build a 6 inch scopeat that size, they say that first-timers do pretty well at grinding and figuring their own optics. After waiting for the stain to dry for a day, I applied polyurethane in two coats, going over the surface with 0000 steel wool between coats. Ideally, the spacer would be 1 inch long and have a smaller diameter, but I didn't get this one right the first time. Trim off any unused fabric along the base. This is the upper tube that contains the flat secondary mirror, Telrad finder, and focuser. Un-real!!! too far. Unfortunately I don't have a 3d printer. As the authors describe the benefits of a truss design, it is hard to dispute their arguments. Accordingly, with 1.25 focuser, you can use 1.25 eyepieces, with 2 focuser - both 2 eyepieces and 1.25 (through a special . once. One of the companies I had considered as a supplier for the primary mirror was Anttler's Optical. Place the focuser, draw the position of the screws with a pencil and remove the focuser. 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. If not, you may need to design and print your own bracket(s), gears, and so on. I suppose that one could complete this project without these two tools, but it would be difficult to cut the pieces accurately enough for a good fit. 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. Robert Brown did an excellent video on how to work out your stepper motor requirements. 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. You really need a step ladder even for my 10" when pointed overhead. #2 knitting needle would be just about right. From everything I had read, I expected that getting a sonotube would be as easy as running to any hardware store and picking it up. 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. When I ordered the cell, I paid through paypal, which immediately deducts money from my checking account. This simple homemade device will reduce star trails far better than if the camera was mounted on a tripod alone. 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 I wanted the long focal length for good contrast. Building the mirror box is tricky, because the entire optical assembly (mirror cell, mirror box, trusses, secondary cage) must balance at the center of rotation of the arms. installations. tube and nut that fits the outside threads. The extra force will also I decided that my best option was to scale up their 8 inch design for a 12.5 inch scope and sacrifice the portability and easier storage of a truss scope for something that I felt confident in building myself. Low, or Zero slop when changing direction. Remember: It is the quality and SIZE of the capture chip, NOT the megapixels that determines quality. surfaces to put the bearings in and a vee at the bottom that would hold Unbelievable! (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.) I did not wrap the tube until I had completed the base. I pointed it at distant trees and had no problem bringing the image into focus with all of my eyepieces. I tried to call, but the voice mail had a recording stating that the customer was unable to receive messages. After the second call, I received a response that it would be ready at the end of the following week. DIY Truss Dob input: How to design truss? But who cares, really? Attach the ball head to the top board. Here is what I was working on but looks like I need a better design. 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. 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. The Focuser and other items: (Scope Stuff). was straight so I wouldn't get a wobbly knob. the drive shaft close against the drawtube. His passion is using CAD design and his homemade CNC router to bring large wood projects to life. how much travel you actually need, you can cut the tube off so none of This combination has the best resolution (steps/revolution), so I didn't see any reason to build anything else. Find a special something for the makers in your life. on Step 3. Finally, I attached Keepers to the sides of the rocker at the bottom of the arcs using screws and glue. To interface with the computer, I have used the Artemis Focuser module from Steve, Arthur and Co. The balance point determines the height of the rocker sides, so I had to get this far before I cut the wood for the base. I don't have the skills to build a focuser using a. I will post the pic of final focuser once ready. After a few weeks of no communication from them, no ability to phone or email them, and no mirror cell arriving. the side of a rigid secondary cage. Frustrated by these difficulties, I stopped by one more hardware store to ask for advice. All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . Helical is one of the option i am considering. The mirror cell: University Optics (eventually). The only thing on the list that was a bit difficult to find was baltic birch plywood, which had to be special ordered from the lumber yard. Measure twice, drill The wood would cost the same, as would pretty much everything except the mirror, so why not spend a little more on the mirror and go BIG. If you are (for example) doing a focuser for a catadioptric telescope like a Celestron C-8 or similar, the focus knob has no load on it so this smaller, lighter motor will do the trick. Rock Paper Scissors Using Tinkercad Circuits and Arduino, Punchy the MECH & the Autonomous Fight Club, PCB (printed circuit board) - download the, DRV8825 - stepper motor driver chip/board - again, clones available on. At this point, the scope was pretty much finished. weight. To get this arc, I actually moved the radius of the jig in by 1/8 inch. Some quick tips to note if you are making a homemade telescope are: 1. See the images how I plan to assemble it. Nice one. 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 took the whole tube assembly outside. The dimensions of the Tube Box Sides are based on the outer diameter of my tube14 3/16. It doesn't. A tilted focuser will have no effect on the image quality. I found a used 16 primary on eBay. I have built a homemade electric focuser for my Celestron 8SE using a radio control hobby servo and some spare parts. The project took several months off and on to complete, although a skilled Maker could put a similar one together in a few weeks. larger diameter. And, once your telescope is finished, be sure to join a local astronomy club to learn more about the sky and share your hobby with others. Your astrophotographer friend may have included his own images from his setup. Have you made any mods on it since you built it? Home centers and hardware stores did not carry large sizes. (The 8 inches from the center of the secondary to the field stop in the focuser is the same 8 inches from the center of the focuser to the top of the tube.) 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. Crayford-style design with four bearings and one driveshaft. This Instructable describe the planning, design, and parts of the scope, as well as the process of building The scope. Then it was time to stain and finish. If you're not using heavy eyepieces, you probably don't need Did you make this project? Finally, attach your polar alignment device and align it with the hinge. The hole did need to be enlarged slightly by moving the bit within the hole , but in the end, the fit seems right. 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. 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. The cell from Anttler's, for which I had received a refund, had arrived. Use mild soap and distilled . 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. I carefully cut exactly through the center of each side bearing circle to make my semicircles. Fairly easy to build and could be adapted to suit any SCT focuser. "https://ssl." Those are the last screws to be tightened. Here is a simple 3D printed helical focuser that cost just a few cents (assuming you have a 3D printer). When you're ready to go on to testing with the windows driver, you want "myFP2_DRV8825_312-1", open that folder. Once I decided to build a scope myself I had to decide on the aperture of the scope. 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. a try. 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. I drilled holes for the screws that avoided the location of the ring, and attached the rocker bottom. They suggested a construction supply place on the other side of the city that I had not called yet. I built a second set of electronics, and I had the NEMA 17 Direct Drive motor left over since it didn't work for my Orion ED80T-CF refractor. I would also like to know about how you can take such fantastic pictures without a field rotator and an autoguider system. To cut the circles, I started with a depth of about 1/8 inch, then lowered the bit and cut a little more with each pass until I was through the board. 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. My telescope is the Orion ED80T-CF. #@$%^#@!!!!! I paid the 50% deposit and dreamed of DSOs. While I will freely admit that most astro-photography is WAY beyond me, you certainly do NOT need a $3200 camera to do so. A 6 in primary mirror does not have enough weight to make the dob stable. a "rubbery" feel. A smart collection of books, magazines, electronics kits, robots, microcontrollers, tools, supplies, and more That helps with low-profile (actually, it ended up a smidge more than 2 inches). 11 years ago It has become an indispensable piece of equipment for me that so beats hacking and filing PVC pipes etc. After you've done that, put a couple of tiny pan-head screws can't click on it or copy and paste it; it's a graphic file to thwart Download the Gerber Files. The heaviest piece is 40 lbs, and the total scope weighs about 60 lbs (not counting the baffle).

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