Star Adventurer Pro Pack Counter Weight Bar Thumb Screw Upgrade. With the DRV8825 and Arduino Nano plugged in, the basic board is complete. After the second call, I received a response that it would be ready at the end of the following week. There are some test sketches in the "Tests" folder, start with those. I have several of the books on building a Dobsonian Telescope. Pierre's Helical Crayford gets my vote hands-down for elegant simplicity. After you've done that, put a couple of tiny pan-head screws Did you make this project? 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. Only problem is if I put a diagonal it wants to rotate the helical part. We use cookies to continuously improve our websites for you and optimize its design and customization. A bit of a monster! A Pocket Sundial From a Broken Pocket Watch! in the tube so they'll hit the knitting needle before your drawtube runs 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. 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. It just Make an account on JLCPCB.com, upload the Gerber zip file, that's it! The plate has slotted screw holes for tensioning the 6mm belt. Thanks for your article. 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. Among amateur telescopes, the most common are focusers with landing diameters of 1.25 ", 2", rarely 0.965 ", and even less often - 3". Im sorry to hear you couldn't make the contest. document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); This sure is going to be a project I will work on. Below are cutting diagrams and diagrams of the rocker and tube box with side bearings. Contact cement is permanent, so the only solution would be to replace the tube! 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. The glue should keep the nylon from fraying. (Sorry you I sanded all parts of the telescope with 220 grit sandpaper followed by 400 grit, making a very smooth surface to apply the stain. 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 As the thread shows you could also build the dual speed version, all made of plywood, if you feel ready to tackle a slightly more complex project for a cost of about 5$ more. Place the focuser, draw the position of the screws with a pencil and remove the focuser. 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. adapter set screws to slide into. I have seen some VERY impressive photos similar to those, taken with Nikon D700 and D300 cameras, with the proper filters- and mounts- on a quality scope. 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 Make the drawtube longer than you think you'll need, just in Finally, attach your polar alignment device and align it with the hinge. Headers for the LEDs, buzzer (2-pin) and temperature probe (3-pin). Unfortunately I don't have a 3d printer. When I ordered the cell, I paid through paypal, which immediately deducts money from my checking account. 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. 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. It turns out the the extra 1/16 allowed far too much side to side movement between the rocker and ground board. This is the upper tube that contains the flat secondary mirror, Telrad finder, and focuser. a 3/4" thickness. For a while I decided that 10 inch would be the best size. Thicker walls also required thicker side bearings so that the outside of the bearings would line up with the outside of the rocker sides. Un-real!!! I did find, though, that the 3D printed gear would slip on the shaft, so it needed a set screw. Most of these have one or two set screws. 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. 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 Introduction. The wide square footprint would make it pretty stable when mounted to Start with the small components first. I've been using the above pair I didn't receive any confirmation email after a few days, so I tried to send them an email. Focuser minimum height is 50 mm and maximum a little over 90 mm so it is good overall. Share it with us! - Bill. I am thankful to enjoy the inspiration, and the details, that you provide, as I will soon be constructing a Dobsonian Telescope. Slide the eyepiece into the focuser and try it out. Thanks Peter. You can easily, and economically (10$) build a Crayford Helical Focuser like the one pictured above in one evening with simple tools. Two different construction supply companies told me that sonotubes were not available with a 14 inch diameter, even by special order. I waited until dark and pointed the scope at the sky. I'd Download and check them out, I just grabbed the first one and printed it. exactly 2" with adhesive labels placed one at a time inside the tube Crayford focusers are considered superior to entry-level rack and pinion The Crayford focuser is a simplified focusing mechanism for amateur astronomical telescopes. When you're ready to go on to testing with the windows driver, you want "myFP2_DRV8825_312-1", open that folder. Showcasing amazing maker projects of 2022. This unit takes signals from your computer and drives the stepper motor on the focuser. Not sure how your toilets are built over there, but here they use what is called a tank flush valve. The company has a reputation for excellent optics, and it was neither the most expensive, nor the least. I had installed the mirror about an inch too far away from the focuser. The premier publication of maker projects, skill-building tutorials, in-depth reviews, and inspirational stories, ASIAIR - Is there an easy way to load Messier catalog into Autorun? Then it was time to stain and finish. I also doubled the thickness of the rocker sides (not the front wall) to provide better support for the heavier tube. ScopeStuff is awesome!! See above, this motor does not produce a lot of torque, but you don't need much for this application since there is no 'load' on the focusing shaft. I had designed the tube box so that there would be an extra inch around the tube. The length of the Rocker Front also had to be changed so that the outside edge of the Side Bearings matched the outside edge of the Rocker Sides precisely. I ordered the focuser, received an immediate email confirming the order, and it arrived two days later. 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. Rather than use a sheet of plastic Kydex to finish the tube, as recommended in K/B, I ordered a sheet of birch veneer. The holes in the main bracket the match the holes in the plate are oversize to allow for this alignment. I only use the OTA. that is a great website that guy has some fantastic photos. Featured in the February, 2015 issue of Sky & 100A81BF-2145-44D5-BC76-66DBF43BAD58.jpeg. Topics such as focuser. This combination has the best resolution (steps/revolution), so I didn't see any reason to build anything else. The mirror box encloses the mirror cell and allows the entire telescope to rotate vertically. I brought a saw with me so that I cut it in half to fit in my minivan. The one company that did provide a price quoted over $500more than I was willing to pay for cardboard! a "rubbery" feel. Attach the eye piece to another cardboard piece and pass it through the hole from the inside of the tube. Attach the ball head to the top board. on Introduction. I'm' glad I did, because I didn't like the first color that I had chosen. I don't have the skills to build a focuser using a. Someone is pulling someone's leg here. spambots that search the internet for addresses to send junk mail to.) So, as they say, "back to the drawing board". Built one of these http://emediadesigns.com/focuser/ working really well only cost less than 40.00. needle so the knitting needle will be snug against the drawtube without Before you do this, the stepper motor will probably move, but it will make a 'stuttering' sound instead of moving smoothly. Install on Windows 10, this part is pretty straightforward. After cutting the circles for the side bearings, I set up the jig to cut the curved edges of the rocker sides. The bearings only need to be I have already seen some designs on CN, Stellafane and web but still checking if someone has recently made anything simpler. Drawing lines between opposite corners of the tube box sides allowed me to locate the center point on each side. If you mess up, you can turn the hole into a slot, but avoid Both cameras have fairly small megapixels by todays' standards, and are certainly obsolete, but do the job extremely well! accessible by all ages and skill ranges. Please explain, in detail, how you attached your tube to the very unique drive system of an XT12G mount. I don't have the skills to build a focuser using a. Maker-written books designed to inform and delight! These are mounted 120 degrees apart and use 4 inexpensive bearings to support the tube. The cell from Anttler's, for which I had received a refund, had arrived. If you found some good surplus lenses, you will have made a stunningly good objective for your scope. I call shenanigans on every picture in this post except for the the moon. Position "0" is with the focuser all the way IN (at least for a refractor). If you're going for simple, have you considered a helical focuser? Very simple and portable. And bolt to scope 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. 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. The part is very strong! 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. They suggested a construction supply place on the other side of the city that I had not called yet. I will post the pic of final focuser once ready. I found a used 16 primary on eBay. Using a compass I drew circles on the top and bottom of the ground board to mark the inside and outside of the teflon ring on the bottom of the rocker bottom. This motor is available on Amazon. The focuser knob had two set screws. The version number "312" here may change if Robert posts new firmware. Next step, before my first acquisition of any parts, is to get with any amateur astronomers in Central Florida, so, wish me luck! Staples or finishing nails work fine, but be sure they dont bump up above the surface of the plastic. Picture of DS-4. After the pieces were glued together, I used a belt sander to smooth out any rough edges, being careful to keep both rocker sides and both side bearings exactly the same. Frustrated by these difficulties, I stopped by one more hardware store to ask for advice. After a dry fit of the rocker to make sure that the tube box with side bearings would fit well, I glued the rocker sides to the rocker front, holding them in place with small nails and clamping overnight. The mirror itself must also be able to tilt in three dimensions in order to aim its light at the secondary mirror (a process called collimation). Once its cut to length, drill a hole through each end of the tubing with a drill press. I also figured that the extra expense was worth it, considering the amount of money I was investing in the project overall. It was easy enough to drill a hole and tap threads for a think that design would be rigid enough under the weight of a diagonal The Artemis module works extremely well, and is to be strongly recommended. With adapters for any Meade 1x200-ACF or LS model, and chord to plug into focuser port. A free program that lights childrens creative fires and allows them to explore projects in areas such as arts & Since my plan called for purchasing the mirrors and mechanical parts there were several decisions to be made and several vendors to contact. A celebration of the Maker Movement, a family-friendly showcase of invention and creativity that gathers The side bearings are each made from 2 identical semicircles of 5/8 inch plywood glued together to make a thickness of 1 inches. This cost around $100 to build and all of the components came from Jaycar, except the brackets which were made with 1.2mm sheet metal. you could probably space the bearings 3/4" apart instead of 1" and mount We are now ready for some testing. This focuser (see pic at bottom) was motorised by me several years ago, but the motorised system didn't give me very fine control, and the motor running at fast speed tended to make the Artemis camera crash. Having an RS trade counter 2 miles away is such a luxury! 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 have no idea how much mail this idea will generate, so I can't Read the documentation though, there are a lot of functions and options. 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). (Technically, it should have been 62.5 for a 12.5 inch f/5, but when the mirror came it had a note on the back that the focal length was 61 inches.) It has become an indispensable piece of equipment for me that so beats hacking and filing PVC pipes etc. I decided to keep this tube for now and if I run into problems with it, I can replace it later. Download the Gerber Files. Pierre Lemay, thanks for sharing your simple and incredible design. For the ATMer I do find that there are an endless number of parts that can be designed and printed for home built telescopes and binoscopes. Dozens of projects in every issue covering electronics, craft, fabrication, and more, Learn tips and skill-building tutorials from experts in the maker community. Actually getting the parts into my hands turned out to be more of a challenge than I would have expected, but in the end, I have a wonderful telescope that I enjoy very much. But, especially on cold evenings, the focus may go out in the middle of the night. 5 weeks after I had ordered the mirror, I called to ask about its status. I had considered using a clear finish alone, but decided to use a dark red finish on the base and a clear finish on the tube, just because I like the look. It seems to And a flat thing to put it all on I started by trying to drill out a metal gear for the focuser shaft. So I was looking for a cheap, light-but-sturdy design for a Be creative! love to hear from people who are interested in this focuser design. "https://ssl." I want to make this direct drive system work. 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. 11 years ago My guess is that photo was taken with a refractor. 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. 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. If the telescope rotates forward or backward on its own, then the mirror box is too deep or too shallow. Subscribe to the premier DIY magazine today, Community access, print, and digital Magazine, and more. 1" Rack & Pinion Focuser. Just to make sure I liked the stain, I applied some to a piece of scrap wood. DO NOT drill out the holes in the board! Thanks for the great comment. and an eyepiece. A couple setscrews and you're up & running with an off the shelf solution. 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. The last chapter of the book describes a plan for an 8 inch sonotube dob with a few design elements from their truss design, and, as I read that chapter, the simplicity of its construction was very appealing. 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! As the telescope tilts toward the horizon, the mirror must be supported on its edge. But I wanted a larger mirror, and, at that size, grinding my own was not an option. Newton, and others including James Gregory and Laurent Cassegrain, believed that a reflecting telescope would not be affected by the chromatic aberration that affected . an eyepiece. I drilled holes for the screws that avoided the location of the ring, and attached the rocker bottom. I did not glue the bearings to the tube box in case I needed to adjust the position later. Have you made any mods on it since you built it? 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. They're fairly Your astrophotographer friend may have included his own images from his setup. Once you get it working, there's some calibration you need to do. 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. OK, no, I do not have a homemade Crayford focuser but am planning to build a 3 incher for next years 17" reflector telescope project and to hold my new 30mm ES 100 degree EP. I attached keepers 1 inches wide by 5 inches long, extending above the bottom of the arcs by about 1 inches. Because thebasic movement and optics requirements are relatively simple, much of the design is left to the builder. I am working on a diy focuser design for my 6" F/8 telescope and asking suggestions for simple focuser. Knitting needles are The focal length of the mirror is 61 inches. 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.) This motor is available on Amazon. The extra force will also When you want to focus, you just open the program and press focus. But who cares, really? #2 knitting needle would be just about right. Best Wishes, Reply It's easy to shim it to This Instructable describe the planning, design, and parts of the scope, as well as the process of building The scope. Your design is simple and nice. I ended up modifying it a bit after printing. 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. His project is very well documented. I welded mine from steel square tubing. 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. 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. During on-site assembly, attach each truss to its mounting T-nut using a bolt with a thumbscrew knob. Telescope Magazine. I started with a spacer that with a inch outer diameter. That evening I spent most of my time rediscovering the many DSOs around Sagittarius, especially the Lagoon Nebula and the Trifid Nebula. } 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. To make the hole for the focuser, I used the focuser tube to mark a circle in the shroud. This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". 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. More Homemade Refractor Telescope DIY Erecting Prism Binoviewer Focuser here: Did you make this project? Some quick tips to note if you are making a homemade telescope are: 1. I wanted a tight / press fit, so I only added half that, 0.25mm. NEMA-17 Stepper Motor - see below, there are two options. (I didn't have the primary mirror yet). This arrangement turns 100% true, no wobble. on Introduction, Very nice build nikon20. the nylon screws going up from the bottom, but I found the knitting I'd be willing to bet that you could easily grind your own 12.5 inch next time and save some $$. The cage should be a hollow cylinder about wider than the mirror, with the focuser mounted directly facing the secondary mirror. The diameter of the focuser is usually indicated in inches. needle adds no friction that I can feel to the focus action. The blue pieces of the rocker box and ground board are arranged as in the diagrams in (figure 2). You simply glue or screw the 'nut' part to your scope OTA, and thread the tube part in/out to focus. I set things up in daylight and collimated the scope. Made of plywood, the rocker box supports the mirror box on 1 teflon pads, allowing it to rotate vertically. As I set of the scope, several club members came over to check things out and it was nice to hear the positive comments on the appearance of the scope. (actually, it ended up a smidge more than 2 inches). 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. Also no obvious diffraction spikes in the m31 photo. A 6 in primary mirror does not have enough weight to make the dob stable. like, you can have as much focuser travel as you want no matter how Dobsonian telescopes are popular with amateur telescope makers for their ease of design and construction, portability, and their use of large optical mirrors.
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