Robert is a super guy and more than willing to help those who choose to follow in his footsteps. I used the "LEDandBuzzer" and "TestStepsDRV8825" tests. on Step 1, interesting build, its just like my old Odyssey brand scope from the mid 1990's. The kit just contains the electronics - it is up to the user to find a stepper motor and attach it to their own telescope focuser. The project took several months off and on to complete, although a skilled Maker could put a similar one together in a few weeks. ScopeStuff is awesome!! The focuser shaft on the telescope is 13.1mm in diameter. See captioned photos 22-25 here:https://www.cloudyniractor-focuser/ for more detail on building a flush valve focuser, as Bob mentions. By adjusting the bolts, the mirror can be pointed toward the correct spot. focusers for that project. I would love to see your build when you are finished with it . Secondary mirror with spider holder Search on eBay for a matched set. I have one on my 12" f/5 truss dob and the focuser knob is on the top surface of the UTA. A Pocket Sundial From a Broken Pocket Watch! I will post the pic of final focuser once ready. The side bearings are each made from 2 identical semicircles of 5/8 inch plywood glued together to make a thickness of 1 inches. Once I had my design set, I was ready to buy the parts. My DIY Motorized Telescope Focuser - YouTube I then attached the Ebony Star ring using contact cement. Another vote for Pierre's helical Crayford design. This is the first telescope that I have built. Have you made any mods on it since you built it? The scope including the optics, truss tubes, and eye pieces all stored in a single box making it easy to store and transport by car, but it was a little too big to fit in the overhead compartment or under the seat on most aircraft. Rock Paper Scissors Using Tinkercad Circuits and Arduino, Punchy the MECH & the Autonomous Fight Club, Soft-sensor-saurus | an E-textile Soft Sensor Soft Toy With LED Light. I don't have the skills to build a focuser using a. and an eyepiece. I then ran a bead of glue on the mark, and after it dried I cut out the nylon up to the glue. Drill the holes for the knitting Pioneered by John Dobson in the 1960s, the instrument combines a Newtonian reflector telescope with a unique two-axis movable base. The mount and tripod are pretty much useless for astrophotography. To do this, the mirror cell needs to be supported by 3 large bolts, at least 2 of which are adjustable. Download and check them out, I just grabbed the first one and printed it. This motor has a larger shaft diameter (8mm) and is quite a bit heavier overall than the direct drive motor, mainly because of the gearbox. large in diameter (1.6") so that adds to the fine-ness of the focus After the second call, I received a response that it would be ready at the end of the following week. I marked the spot and moved things back inside to install the mirror. Un-real!!! Edited by Pierre Lemay, 25 May 2020 - 08:10 AM. 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. Coupler for NEMA-17 Stepper Motor (also two choices, see below), LM7808 Voltage Regulator with TO-220 package -, Mini On/Off 3-pin 2-position slide switch -, Headers and wire (miscellaneous sizes and gauges), these are important so you can replace the component if it is damaged, LM7808 voltage regulator w/TO-220 heat sink package, 2-pin headers for 12V power and on/off switch. Easy DIY motorized battery free telescope focuser - YouTube You need to order it sized for your focuser shaft size. Two of the holes for the bolts were blocked by knobs. It doesn't. A tilted focuser will have no effect on the image quality. To get a slide-fit in a 3D printed part, you normally make the hole 0.5mm larger than the shaft. This is because my router bit was inch and the arc would be cut by the outside edge of the bit (where the circle had been cut by the inside edge.) During on-site assembly, attach each truss to its mounting T-nut using a bolt with a thumbscrew knob. My first telescope I built was a 10" F8. Make an account on JLCPCB.com, upload the Gerber zip file, that's it! Plan ahead by carefully weighing all components and approximating the center mass of the optical assembly. NEMA-17 Stepper Motor - see below, there are two options. The plastic will ride on teflon pads, creating just enough traction for the telescope to avoid sliding on its own while not making it too difficult to point at things in the sky. Before finishing the tube with a wrap of veneer, I wanted to make sure that the primary was in the correct position. You will have to line up the diagonal and primary so that you see a centered image of the sonotube opening and the spyder in the eyepiece hole. 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. But I wanted a larger mirror, and, at that size, grinding my own was not an option. A Beginner's Guide to Collimation - Gary Seronik Tips If you've got a 1.25 inch focuser, You can also use it for an objective. PhotoPictureResizer_190723_214534574_crop_2558x3105_copy_1023x1242.jpg. I told them to take their time and get it right. Using plywood, make 4 attachment blocks to pair the trusses together and create a small ledge for the secondary cage to rest on while you secure it. I could not find a spacer to fit my 9/16 hole, so I bought the 11/16 spacer (1 1/8 long because that's what the store had) and a bit of the same size. If you want a Crayford focuser with a knob instead of turning the draw tube, then Jerry Oltion's designhttp://www.jerryoltixycrayfords.htm using box frames and knitting needle drive shafts is also a fairly easy build. Pierre Lemay, thanks for sharing your simple and incredible design. Telescope Focusers | Orion Telescopes: Shop 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. All Dobsonian telescope projects are unique buildshere are the notes from my latest version to help get you familiar with the process and determine how youll design yours. 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 This NEMA-17 direct drive stepper motor is available from Adafruit and many other sellers. I redrilled the holes for the mirror cell and got ready to wrap it. 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. Plus it comes in black, so The version number "312" here may change if Robert posts new firmware. I'm' glad I did, because I didn't like the first color that I had chosen. document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); But who cares, really? I attached small felt pads to the inside of the keepers to protect the side bearings from scratches, but discovered that the side bearings would not fit because of the thickness of the pads. Share a cool tool or product with the community. We moved the operation to a nearby park and got a focused image of the most distant trees (300-400 yards away) quite easily. Find a special something for the makers in your life. That way you won't be dropping your drawtube and A Pocket Sundial From a Broken Pocket Watch! 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. I ended up modifying it a bit after printing. A homemade 16 inch dob lightweight telescope, DS-4 - XMission Drawing lines between opposite corners of the tube box sides allowed me to locate the center point on each side. I attached keepers 1 inches wide by 5 inches long, extending above the bottom of the arcs by about 1 inches. The mirror box encloses the mirror cell and allows the entire telescope to rotate vertically. Since my plan called for purchasing the mirrors and mechanical parts there were several decisions to be made and several vendors to contact. Perfect for visual observations with very heavy mirrors. To place the primary mirror, I installed the secondary and installed the primary in the mirror cell. I had nearly completed the base and put things together for the first time. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. Whether you need a basic rack-and-pinion telescope focuser for your homemade telescope project or a premium Crayford-type model with dual-speed focusing as a performance upgrade, you have come to the right place. Although they don't usually sell these parts, because I had ordered the mirrors from them they offered to sell me the spider and secondary holder that they use in their scopes. Whether you need a basic rack-and-pinion telescope focuser for your homemade telescope project or a premium Crayford-type model with dual-speed focusing as a performance upgrade, you have come to the right place. Newton, and others including James Gregory and Laurent Cassegrain, believed that a reflecting telescope would not be affected by the chromatic aberration that affected . installations. They have many items for ATMers and I had frequently visited their website when planning my scope. After cutting the circles for the side bearings, I set up the jig to cut the curved edges of the rocker sides. I also have an extended photographic build diary of this telescope posted on Imgur. When they arrived, they were beautifully and carefully packaged with the secondary already installed in its holder. Place the focuser, draw the position of the screws with a pencil and remove the focuser. Over how many nights did this photography session take place? Next, attach the eyepiece and the focuser to the top part of the telescope tube. 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. One of the neat things about the square design is that the These have slop as you change direction, you can't do fine adjustments, they weigh a ton, and can flex alarmingly over time. on Step 5, 9 years ago Low, or Zero slop when changing direction. One of the companies I had considered as a supplier for the primary mirror was Anttler's Optical. Dobsonian telescopes are popular with amateur telescope makers for their ease of design and construction, portability, and their use of large optical mirrors. Several of my Recent Images have been focused with this system. It turns out that sonotubes are a stock item in 8 inch, 10 inch, 12 inch, and sometimes even 16 inch diameters. Focusers of telescopes. Types, difference, specifications - Star Hunter Perfect for astrophotography or during high power planetary observation. Again from the main FILES page, go to "ASCOM DRIVERS" and download everything. 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. Very simple and portable. But, especially on cold evenings, the focus may go out in the middle of the night. Link to the motor speed controller kit:http://www.jaycar.com.au/productView.asp?ID=KC5225(a 5K external potentiometer will be required): http://www.jaycar.com.au/productView.asp?ID=RP3508The drive motor:http://www.jaycar.com.au/productView.asp?ID=YG2734The gears:http://www.jaycar.com.au/productView.asp?ID=YG2736The motor forward/reverse switch:http://www.jaycar.com.au/productView.asp?ID=ST0506The push button:http://www.jaycar.com.au/productView.asp?ID=SP0711 This one is based on the DRV8825 driver chip and a NEMA-17 stepper motor. I did find, though, that the 3D printed gear would slip on the shaft, so it needed a set screw. When you want to focus, you just open the program and press focus. Motorise Your Own Telescope (updated 10-19-2017). - Instructables Two inch internal diameter drawtube. the bearings, totally eliminating any flex. 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. If you mess up, you can turn the hole into a slot, but avoid The Artemis module works extremely well, and is to be strongly recommended. Im sorry to hear you couldn't make the contest. Shorter thread side will be used to attach the eyepiece. Pierre's Helical Crayford gets my vote hands-down for elegant simplicity. You really need a step ladder even for my 10" when pointed overhead. try { spambots that search the internet for addresses to send junk mail to.) I had considered a Moonlite or Featherlite focuser, but I knew from my experience with my 6 inch scope that I wanted a 2 speed focuser, and the price tag of their 2 speed focusers scared me away. "); This book describes in great detail the steps to build a large aperture truss tube dob, focusing on scopes with a 12.5 to 40 inch mirror. #2 knitting needle would be just about right. Just drill holes in both ends and mount the lenses. You need some purple bits Thicker walls also required thicker side bearings so that the outside of the bearings would line up with the outside of the rocker sides. Similar photos at http://www.telescopegeek.com/gallery.htm require 100+ minute exposure times on his 20" telescope and $3200 camera. And a flat thing to put it all on My telescope is the Orion ED80T-CF. This motor is available on Amazon. It is used to setup water outlet from overhead water tanks. I set things up in daylight and collimated the scope. It is size 1.25 inch with a clear inside dia-meter. Please explain, in detail, how you attached your tube to the very unique drive system of an XT12G mount. on Introduction. A week after they said they would send the secondary and other parts, I called to ask if things had been sent. 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. There are sub-folders for the different versions. Here are a few photos of the "bracket", which is a simple 3D printed plate that mounts to the telescope's focuser ring, and serves as a mount for the stepper motor. Motion is very smooth. Able to make myself using my own humble tools (or toys as the pros will call them!). I had designed the tube box so that there would be an extra inch around the tube. 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. Today I purchased what is called atank nipple in India. exactly 2" with adhesive labels placed one at a time inside the tube I do it with aluminium alloy, aluminium tube and nice work. If you wanted to really go low-profile with this design, I drew a guide line straight down the side of the tube and cut the veneer to length with one extra inch on each side68 inches long. 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. You simply glue or screw the 'nut' part to your scope OTA, and thread the tube part in/out to focus. Feel free to take on that part if you like, but you're on your own :-). how much travel you actually need, you can cut the tube off so none of They eyepiece height ended up being about 5'10" high at zenith. 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. How to build a 12.5 inch closed tube Dobsonian telescope. How to make a $30 DIY star tracker for astrophotography 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. Position "0" is with the focuser all the way IN (at least for a refractor). It has a 6mm shaft. Use mild soap and distilled . Above youll find an interactive 3D rendering of the Sketchup file I used to design and cut all of the parts for my telescope. Someone is pulling someone's leg here. I found a used 16 primary on eBay. The telescopes size is classified by the size of its mirror. In order for the Rocker Box to pivot on the Ground Board, a center pin is placed in a hole at the exact center of the Ground Board and Rocker Bottom. LVLaserTech is right please do not vote for the pictures my instructable is for the build of the telescope not the quality of the photos.and as i said before i was not there is there a possibility that he sent me the wrong photos sure is there a possibility that he used a different mount than the one i saw sure is there a possibility that he is lying to me me about what he did sure. Those are the last screws to be tightened. narrow the frame. small, it's surprisingly rigid. 4 years ago 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. We all know the problems with focusing. Two different construction supply companies told me that sonotubes were not available with a 14 inch diameter, even by special order. After looking at many focuser options with a big range of prices, I decided to order a GSO 2 speed Crayford focuser from ScopeStuff. I Hope to give you ideas if you are thinking about building one for yourself! I welded mine from steel square tubing. Here is a simple 3D printed helical focuser that cost just a few cents (assuming you have a 3D printer). Since there is no drill bit that exactly matches the 13.1mm of the shaft, I had to do some rough enlargement of the hole. My guess is that photo was taken with a refractor. To cut the circles, I used a router with a straight cutting bit and a circle cutting jig. Overall, I'm very happy with the outcome of this project - focusing is now a joy. That evening I spent most of my time rediscovering the many DSOs around Sagittarius, especially the Lagoon Nebula and the Trifid Nebula. Subscribe to the premier DIY magazine today, Community access, print, and digital Magazine, and more. I used a hole saw to cut a wooden plug to fit inside the My wife helped me by moving the mirror into and out of the tube around the marked spot while I stood at the eyepiece trying to bring some distant trees into focus. Carve out a hole on the top part of the sonotube first. I only use the OTA. he might just have a $3200 camera, they aren't very hard to come by. astronowanabe, Pierre Lemay, LarsMalmgren and. This arrangement turns 100% true, no wobble. 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. stronger, but would give me a coarser focus action because of their I was concerned that it would be difficult to find, but I was able to order it from a local woodworking shop.

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