That evening I spent most of my time rediscovering the many DSOs around Sagittarius, especially the Lagoon Nebula and the Trifid Nebula. The cost is a bit more than some of the other combinations, but by only $10 or $20. I didn't receive any confirmation email after a few days, so I tried to send them an email. My plan for wrapping the tube seemed good, but I am not too pleased with the final result. You really need a step ladder even for my 10" when pointed overhead. His passion is using CAD design and his homemade CNC router to bring large wood projects to life. I attached keepers 1 inches wide by 5 inches long, extending above the bottom of the arcs by about 1 inches. To cut the circles, I used a router with a straight cutting bit and a circle cutting jig. We all know the problems with focusing. 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. Or in my case, back to SolidWorks :-). Not sure if it is available in the USA. It has a 6mm shaft. The next day my wife called me at work to tell me a box had arrived with telescope stuff. Finally, I attached Keepers to the sides of the rocker at the bottom of the arcs using screws and glue. knitting needle where it goes through the hole, so it's not a big deal, 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. But who cares, really? But, like many of you I'm sure, the biggest reason I'm doing this is for the pure geeky fun of it! A neet site: http://www.astropix.com/HTML/I_ASTROP/CAMERAS.HTM Cool instructable, Dude! The part is very strong! occurred to me that a square turned 45 degrees would give me two flat I applied contact cement to the first inch of the veneer and the mating inch of the tube. After another 3 weeks, I was concerned that I had not received the mirror. 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. Orient this assembly to allow you to view an object on the far horizon. Two such companies would not give me a price because the order of a single tube was too small. 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. Another vote for Pierre's helical Crayford design. This software creates a model of your telescope by measuring out of focus star sizes at various points. The secondary holder is adjustable, so I could didn't have to get the location perfect. When you add the minimum distance from the eyepiece to the secondary mirror together with the distance from the secondary mirror to the primary, the total length should be the primary mirrors focal length. installations. 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. This motor is available on Amazon. The lumber yard also gave me a lower price than I expected. Pioneered by John Dobson in the 1960s, the instrument combines a Newtonian reflector telescope with a unique two-axis movable base. I like the old way of using stepper motors and other stuff introduced years ago by Mel Bartels, he is a master for me. I In the sub-folder "Cases" you will see many variants of the case for the DRV8825 based focusers. By adjusting the bolts, the mirror can be pointed toward the correct spot. 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. Not worth the effort, price is tooo high. It wouldn't be a two-speed design, but if I used a thin enough Using a compass, I drew lines for the inside and outside of the Ebony Star ring on the top and bottom of the rocker bottom. The mount and tripod are pretty much useless for astrophotography. Thanks for the great comment. Install on Windows 10, this part is pretty straightforward. I had chosen a boxy, rigid design for the binocular scope, so One of the neat things about the square design is that the Not sure how your toilets are built over there, but here they use what is called a tank flush valve. I have already seen some designs on CN, Stellafane and web but still checking if someone has recently made anything simpler. Im sorry to hear you couldn't make the contest. 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). I have one on my 12" f/5 truss dob and the focuser knob is on the top surface of the UTA. When you're ready to go on to testing with the windows driver, you want "myFP2_DRV8825_312-1", open that folder. I am working on a diy focuser design for my 6" F/8 telescope and asking suggestions for simple focuser. So, I duplicated the aluminum gear pulley in SolidWorks, and printed it out. In the "ARDUINO FIRMWARE" folder, in it you will find a ZIP file "myFP2-Firmware 312-1.zip". You can easily, and economically (10$) build a Crayford Helical Focuser like the one pictured above in one evening with simple tools. This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". knob, and a drill press to make sure the hole for the knitting needle As I continued to read, however, I was struck by the many complications of the design and, frankly, how many ways I could screw it up. Be creative! Move the jigs until you can comfortably place a variety of eyepieces in the focuser and get a sharp image, then carefully measure the separation distances. forward and back along with the drawtube when you focus, and you'll get spambots that search the internet for addresses to send junk mail to.) narrow the frame. But I wanted a larger mirror, and, at that size, grinding my own was not an option. 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. Brandon Lawler is a hobbyist telescope Maker and an active member of the Central Texas Astronomical Society. To get this arc, I actually moved the radius of the jig, At some point in the building process, my goal became to finish the scope by RocheStar Fest, an annual event of the. 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. It is size 1.25 inch with a clear inside dia-meter. Telescope Magazine. Reply 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. homemade Crayford focuser. All in all it seemed like a pretty robust design, so I gave it When the skies were dark enough for observing I found that the scope moves easily into position and holds that position well. The next day, I centered the rocker on the rocker bottom (which had been cut using the same method as the side bearing circles), drawing perpendicular lines through the center of the rocker bottom to use as a guide, and tracing the position on the rocker bottom. 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. I redrilled the holes for the mirror cell and got ready to wrap it. 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 For about $3 we can buy a tank valve kit that has a threaded 2" i.d. These are mounted 120 degrees apart and use 4 inexpensive bearings to support the tube. I set things up in daylight and collimated the scope. The bigger upvc nut will be attached to focuser plate and longer threaded side will be used on it for the focusing. 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. var pageTracker = _gat._getTracker("UA-1008534-4"); To view, go here: http://emediadesigns.com/focuser/ To do this, the mirror cell needs to be supported by 3 large bolts, at least 2 of which are adjustable. The Artemis module works extremely well, and is to be strongly recommended. 4 years ago 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. The drawings are only approximately to scale. It took yet another call a week later for the items to actually be mailed. with a genuine question or comment about the design. The original Crayford Focuser is on display there. I was still doing some construction on the morning of the event, but I succeeded in making first light on that clear, dark night in late July. That's pretty much 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. During on-site assembly, attach each truss to its mounting T-nut using a bolt with a thumbscrew knob. The hole did need to be enlarged slightly by moving the bit within the hole , but in the end, the fit seems right. Thanks again for the 'ible. I'll use an aluminum tube for the finished draw tube but for now the plastic tube . 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. Another thing, the resolution on the Dumbell nebula seems a bit too high for that telescope. Download the Gerber Files. It was important that the two circles be identical because the edges had to match perfectly when glued together and the two side bearings had to be identical in order for the altitude motion to work well. Two inch internal diameter drawtube. It seems to If you're not familiar with Arduino, watch some tutorial videos. For my project I needed a 14 inch diameter, and I had a tough time finding one. After the second call, I received a response that it would be ready at the end of the following week. Motion is very smooth. and hope it doesn't fall off Or rather, I hated it. Dobsonians come in all shapes and sizes, from small 4-8 builds all the way up to massive 24-36 creations. Some quick tips to note if you are making a homemade telescope are: 1. I decided to order an aluminum mirror cell from University Optics instead so that the mirror could be supported at 9 different points. A Pocket Sundial From a Broken Pocket Watch! This is where you will use screws to strongly attach the focuser onto the tube. I was concerned that it would be difficult to find, but I was able to order it from a local woodworking shop. My first telescope I built was a 10" F8. Fast forward a few months to the next time I had the tube outside. All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . My homemade motorized telescope focuser for Celestron C8. The current needs to be adjusted on the DRV8825. Because mirror flexure can distort an image, supporting the mirror properly involves building a flotation cell. 10 years ago PhotoPictureResizer_190723_214534574_crop_2558x3105_copy_1023x1242.jpg. Headers for the LEDs, buzzer (2-pin) and temperature probe (3-pin). I told them to take their time and get it right. Deep space photos like these require HOURS of exposure for each one. 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. My secondary is 4; for tips on choosing size, click here. It turns out the the extra 1/16 allowed far too much side to side movement between the rocker and ground board. At this point, the scope was pretty much finished. eyepiece on the ground (or worse, on your primary mirror!) I'm' glad I did, because I didn't like the first color that I had chosen. on Introduction. Many sources point out that 10 inches is a kind of sweet spot in the balance between power and portability. Helicals are adaptable to both refractors and reflectors, but do not "play nice" with zoom eyepieces because "zooming" becomes a two handed operation to avoid changing focus. a "rubbery" feel. 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. In my build, the cage was cut on a CNC router from plywood, with threaded T-nuts added to support a truss assembly. can't click on it or copy and paste it; it's a graphic file to thwart Secondary mirror with spider holder Search on eBay for a matched set. on Introduction. I gave them a call and they said they had one on the shelf14 inches in diameter and 12 feet long! Pretty dry but important! To interface with the computer, I have used the Artemis Focuser module from Steve, Arthur and Co. In addition, we use third-party cookies to help us analyze and understand usage. Finally it was etched in caustic soda, and anodised matt black. 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. "); guarantee a response, but I'll do my best to answer everyone who writes Parts List (the full story of acquiring the parts), The primary, secondary, spider and secondary holderDiscovery Optics.

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