These are the parts that was fabricated for me by a CNC shop in China. This is 102:1 gear ratio. It has gone from portable to luggable. Aside from the telescope, there really is a surprising amount of complexity, weight, and cost associated with the telescope. It is working for the most part so far. It works! The finished assembly weights ~16lbs. I went down to the hardware store and picked up the bolts for the saddle today and put it together. Bunch of linear slides and stuff. $29,480 CAD. In simple terms, the difficulty of photographing an extremely dim, distant object (or one that is larger but diffuse) is that the camera sensor needs to spend a significant amount of time signal-averaging, to gather enough light, On the electronics side, a custom PCB was produced, with a pair of TMC2130-based stepper drivers, controlled by a teensy 4.0. With some math an alt-az will do for sole shots, and adding rotation at the eyepiece can extend that further. Pentax has some cool technology that sidesteps the need for an equatorial mount: https://www.ricoh-imaging.co.jp/english/explore/astro/. Harmonic drives are very cool, they use a flexible spline on an eccentric bearing that wobbles inside another spline with a couple more teeth than the flexible one. Here is the breadboarded Teensy 3.1, line driver, and bluetooth module: I did some gizmo triage and recycled a bunch of stuff, I now can see some of my desktop: Here are the parts just after being coated and ready to bake. Thanks, it looks like they changed the tag system since I had entered them. New. The jump from $3000 to $10000 for me was mind blowing. >you just dont get to capture the really interesting objects without spending a ton of money on some decent pieces of kit. The huge output torque they allow, meant that [Alan] was able to build a mount for a heavy telescope without any counterbalances. Create an account to leave a comment. kind of industrial look. Great job on your future and many applications! I got the declination fine adjuster installed last night. If it is my portable rig, and I have to drive it someplace, that is one thing. ZWO worked with the astronomy manufacturing community to develop its harmonic drive speed reducer according to the needs of . I lubed up the two bearings with Krytox 240AC, a nonreactive teflon based grease, and put the base together. Learn how your comment data is processed. Alkaid, which hopefully works a bit better for them. The drive had a DC servo on it with a 500 count encoder. 3min doesnt get you close to being long enough for any serious amateur astrophotography. Atmospheric refraction causes object to appear to appear higher in the sky than geometry would predict, so its needed to correct for that. Spent a couple hours making chips last night. Structurally, the whole thing is constructed from 10 mm thick aluminium plates that were cut with a waterjet and subsequently milled to finish. DIY . Next is the dovetail saddle for the scope and the mechanical portion of the scope will be done. DIY Astronomical Telescope Objective Lens Metal Holder For 70mm -106mm Lenses. Even at that it is way cheaper than a commercial harmonic mount. $318.00. I powder coated the last batch of parts for the scope mount last night and mounted the dovetail today. He also uses a 27:1 planetary gear head. Popping this info into LTSpice allowed me to come up with a pretty simple 2 pole low pass filter that should give me reasonable ripple and good step response with a 10v max output. The bearings are mounted in large blocks , bolted to 1 inch think aluminium base plates. Pentax has a fancy toy for people who arent serious astronomy hobbyist and want to point their camera at the sky, nothing more. I may try direct driving the harmonic drive bypassing the 3:1 gearbox, I am pretty sure it will have enough torque. For the box to hold all the drive electronics and controller I used an old box from a communications package for a ScanEagle drone. Substituted a different image when his was unusable? Seems theres already some decent results in the video. The Dec harmonic drive is pretty neat, it is basically a cross roller slewing bearing with a harmonic drive built in. I think these were pulled out of SCARA robots, I got one from S. Korea shipped for $180. To get the polar alignment spot on we do drift alignment, that is point at stars in specific areas of the sky and watch how they drift out of view, then make minor adjustments until they stay roughly put. It depends on the lens youre using. This is called equatorial tracking, and helps compensate for the Earth's rotation during long exposure. Harmonic drives (aka strain wave drives) are pretty neat, working on the principle of a fixed, but circularly distorting ring gear that transmits torque from the inside surface to the outside, with almost no backlash. Give Feedback Terms of Use C $3,539.44 + C $4.06 shipping. What do I win??? I work with harmonic drives for a precision optical positioning application. tripod,might be fine for taking pictures inside the solar system,or if it is mounted on a piece of construction Location: Athens, Greece. I then tapped into the single ended encoder signals back to the controller with a 26LS31 line driver. Top Rated seller. Too complicated? Too complicated? A study for a simple pick-and-place head using a servo and an injection needle instead of a hollow-shaft stepper motor and a standard nozzle, Mitsubishi MR-J2S-20A1 Servo Drive and Motor, Back to work: Tripod and SiTech controller, http://hackaday.io/project/189#j-discussion-7098. You currently have javascript disabled. It's real. a member for this project? . But mind you when youre doing this you want a cooled sensor as well. Watch. If you are a near enough good enough kind of guy then 2 motors will get you very far indeed. To compensate for earths rotation, you just need one if youve got a polar/equatorial mount. C $49.32 5% off Edited by gordtulloch, 12 November 2022 - 06:05 PM. I am probably just going to paint these. They are expensive parts, but for a super smooth movement, this is what you want. In the manual it shows the part number for Molex MiniFit Jr connectors but they are really AMP Mate-n-lok connectors. The design of each of the two axes revolves (sorry!) We found iOptron HEM27A Harmonic Equatorial Mount Head with iPolar and Case # H272A. Me especially having a machinist son who'd show me how to work it. More than I would have like to pay, but oh well. TELESCOPE MOUNT Equatorial VINTAGE MADE IN JAPAN replacement customize . I have since taken it apart and cleaned it out, it runs much smoother now. The jump from DSLR to $3000 for me was mind blowing. I have decided to just buy a saddle and dovetail kit from ADM, I dont want to mess with that. Already have an account? https://imgur.com/a/Snhzj81 The auto-guider is the small scope behind the main telescope, and for shits and giggles I had my DSLR sitting on top of the scope as well (wont do that again, the shutter caused the main 2m scope image to blur a bit). Hopefully it's heavy enough to dampen vibrations transmitted from the tripod, but testing will prove it one way or the other. On equatorial mountings, as well as on Dobsonians, many people are surprised to find that making the . By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Seller 99.9% positive. Returns beyond 50 subframes are quite limiting. For equatorial tracking, this may not bother you. Considering I have had all the rest of the parts lying around I cant complain too much! Please be kind and respectful to help make the comments section excellent. I got an old Quick-Set Hercules 5302 tripod from a friend. I glued the spud into the post mount with some Hysol 1C epoxy. We will see. 10 Reasons Why Relationships Are Withering Over 10 reasons to choose the right dating site, 10 reasons to send naughty photos on Snapchat or Instagram to, 10 reasons to register on a libertine site, Retrotechtacular: Card Programming | Hackaday, Chinese chips are artificially slowed to avoid US export regulations, Play on PC? i.e. It's been a long time since I pulled out my old telescope, but I've got little kids now and I can't afford to miss sleep! Today. I got my parts back from anodizing today and assembled what I have so far. We use a flexible linear encoder wrapped around the outside radius of the axis for feedback, but we need to change directions frequently. (Comment Policy). It is slit down the middle to clamp on the spud and can be loosened for rough alignment. All made out of aluminum so it is still reasonably light. iOptron Carbon Fiber Tripod for HEM27 Harmonic Drive Mounts # 8061. Some 3D-printed side panels hold the electronics in place and box-in the internals giving the mount a tidy. A little overkill but it should work fine. Bottom line is Pentax isnt making an EQ mount obsolete. This is referred to as equatorial tracking, and allows the rotation of the Earth to be compensated for during a long exposure. I milled out one end turning the holes into slots and reinstalled it. For a total cost of $79.80. Considering I have had all the rest of the parts lying around I cant complain too much! Surface Mount Soldering Practice for Budding Electrical AntRunner Is The Satellite Antenna Mount You Need To Take Building a Sinclair ZX81 in 2022 With All New Parts, DeimosC2: What SOC Analysts and Incident Responders Need to Know About This C&C Framework, Sintesi dei principali attacchi informatici sugli endpoint, sulle identit e negli ambienti cloud rilevati fino a oggi nellanno 2022, VMware Warns of 3 New Critical Flaws Affecting Workspace ONE Assist Software, ZD Tech : Meta, Twitter ; pourquoi les gants de la Tech licencient en masse, Twitter : Elon Musk veut virer les usurpateurs et annonce de nouvelles fonctionnalits. Now I need to put together the controls. featured as part of the 2016 Hackaday Prize. This instructable describes the process and steps I defined to create this equatorial mount. This can be achieved by a spirit level, a compass and gauge on the side of the mount where you dial in your current latitude so most serious astronomy gear will only have 2 motors. I'm speechless. Not enough time to build? By the time I added the off axis guider, the filter wheel, focuser, and finally a camera on the scope I lost a lot of sky due to everything hanging off the back. I think these were pulled out of SCARA robots, I got one from S. Korea shipped for $180. I may have to pin it in place. I have a section of worm gearing that might work nice. Vixen 35492 Portable Equatorial Mount Polar Fine Adjustment Unit DX. Telescope aside, there really is a surprising amount of complexity, weight, and associated costs with the telescope, alone, let alone one that is capable of any sort of programmable tracking. [Alan (Jialiang) Zhao] clearly wanted to up their game, and having suffered some of the shortcomings of their Sky-Watcher HEQ-5 pro Equatorial mount decided to go ahead and. Cool. [Alan (Jialiang) Zhao] clearly wanted to up their game, and after experiencing some of the shortcomings of their Sky-Watcher HEQ-5 pro equatorial mount, they decided to go ahead and. So two years have gone by and I have not done a damn thing with this, just sitting in my living room collecting dust. So I ordered some of those off ebay and ordered some mating connectors for the servo motors from mouser. FWIW a one-axis telescope aligned on the meridian was what was used for timing objects and setting clocks for a long time till the digital age. I have some old Vexta harmonic drives. Their technology is limited by both maximum focal length and maximum exposure to borderline unusable lengths. Love the simplicity of using mostly flat stock. Oh well. . Harmonic Drive Equatorial Mount Design/Extra Large Load Ratio Version of BH-17H. Free Contiguous US Shipping. Considering I have had all the rest of the parts lying around I cant complain too much! All rights belong to their respective owners, A DIY Equatorial Mount Using Harmonic Drives, Surface-Mount Light Breathes Life into Your Project. If youre interested heres an example of my scope from 10 years ago: This drives the harmonic drive and gives me a resolution of 8,355,840 steps per rev. I made the dovetail and saddle for the telescope today. New. DIY Harmonic Drive Equatorial Mount | Hackaday.io Find this Pin and more on Diy telescope by Steve McKay. The design of each of the two axes revolves (sorry!) I have taken 3 minute single exposures with my Pentax K-1and Astrotracer on a regular tripod. and Took most of it apart, gave the steppers away, and kept the useful stuff. around the use of a NEMA-17 stepper motor with a 27:1 planetary gearbox, driving a harmonic reducer. Harmonic drives (aka strain wave drives) are pretty neat, working on the principle of a fixed, but circularly distorting ring gear that transmits torque from the inside surface to . Community Forum Software by IP.BoardLicensed to: Cloudy Nights. This isnt just important for poor polar alignment but is critical for things such as imperfect machine in the gears of the mount itself. For reference, the story is someone who is trying to address shortcomings of the Skywatcher HEQ5 mount, a mount which I regularly use for 10-15min exposures with a 2000mm focal length. This piece is the fine adjustment arm, two Vlier fixture screws will push on either side and allow it to move around it's axis. around the use of a NEMA-17 stepper motor with a 27:1 planetary gearbox, driving into a harmonic reducer gearbox. But, that ball of rock we're sitting on is constantly spinning, so the only solution is to follow the object of interest, to compensate. It came out of an old Sperry Gyroscope Tool Set I got a couple years ago. k1200s wrote a comment on 4017 Decade Logic Clock. This gives me stupidly high resolution of 31,457,280 steps per rev. Go and explore the world. 10 Raisons is a news website in French, bringing you your dose of good reasons every day! The building process was documented here, as well as on Youtube and BiliBili. I got the wiring finished tonight, now I need tie it all together and see if it works. As they point out, it only works for shots up to 90 seconds, though one can also composite multiple shots together for somewhat longer effective exposures. Harmonic drives (aka stress wave drives) are pretty neat, working on the principle of a fixed, but circularly distorted ring gear, which transmits torque from the inside surface to the outside, with almost no backlash. Look up Keen-One on printable, its a fantastic 3D printed harmonic EQ drive. I am using a large ball thrust bearing for support and a taper bearing on top of that. After awhile, thoroughly clean off the emery and lightly grease the threads. Holy cow. Hopefully, it is heavy enough to dampen out any vibrations transmitted from the tripod, but testing will prove that one way or the other. I started on the frame that holds the main drive last night. I used some 17-4 TGP stainless I had left over from an old job years ago. Reduces the need for lathes and mills. I can achieve decent images up to ~4 minute exposures. Some 3D-printed side panels hold the electronics in place and box-in the internals giving the mount a tidy. Aside from the telescope, there really is a surprising amount of complexity, weight, and cost associated with the telescope. Continue reading "A DIY Equatorial Mount Using Harmonic Drives" Posted in Space Tagged astrophotography , equatorial tracking , harmonic drive , NEMA-17 , onstep , Teensy 4.0 , telescope . I have finally started working on this mount again. Harmonic drives don't have backlash, per se, but they do exhibit a windup-type error motion that can easily be seen when you reverse directions. Thats fine but its a replacement for people who dont want to invest in astronomy. I had just bought it for the case but figured the rest might come in handy someday. Now the bolts fall in to where they were supposed to before. I inserted the bearing cup into the base, a bit of a tight fit but it pressed into place and trimmed the spud to it's final length. Too complex? Here's the page detailing the entire build process:https://alanz.info/p2/07/diy-mount/, Cool video, I think many of us would give a limb to have such a well equipped shop! BTW, mad props to your very nice project. Hopefully that will keep it from turning. Mount Khatulistiwa DIY Menggunakan Harmonic Drives. But unlike regular photography where there are really diminishing returns once you get a DSLR, and by that I mean you can take pretty damn stunning photos on a $1000 camera these days and not much better on a $4000 camera, the sky is the limit (pun intended) for astronomy. and last updated 5 years ago. Probably 10 years ago I picked up an old PRI robot that had come out of intel or something, I think it had moved around wafer boat or something. Needed a piece of aluminum rod for the bearing spacer/axle. Kn/vD has updated the project titled Centipede Processor. DIY Harmonic Drive Equatorial Mount. Then the encoder feedback from the drives will connect to the encoder inputs on the SiTech. Are you sure you want to remove yourself as Interesting, but 135mm focal length lens is somewhat limiting. Hopefully, it is heavy enough to dampen out any vibrations transmitted from the tripod, but testing will prove that one way or the other. 10 followers The dovetail should be compatible with Losmandy type accessories. However, one has to wonder what if.. A DIY EQUATORIAL MOUNT USING HARMONIC DRIVES Check out the video in the article, can you spot the boo-boo? Or so I thought. Equatorial motor mount by macona, on Flickr Made the motor and gearbox mount tonight. [Alan (Jialiang) Zhao] jelas ingin meningkatkan permainan mereka, dan setelah mengalami beberapa kekurangan dari mount Sky-Watcher HEQ-5 pro Equatorial mereka memutuskan untuk melanjutkan dan membangun mount open-source, Alkaid, yang mudah-mudahan bekerja sedikit lebih baik untuk mereka. The design of each of the two axes revolves (sorry!) I am hoping to find a strip and reader on ebay. I have been looking at the flexible strip encoders from Renishaw. . Here is a video of the one I am using, you can see the flexing of the spline. Animals and Pets Anime Art Cars and Motor Vehicles Crafts and DIY Culture, Race, and Ethnicity Ethics and Philosophy Fashion Food and Drink History Hobbies Law Learning and Education Military Movies Music Place Podcasts and Streamers Politics Programming Reading, . Strictly information sharing and no idea if this is real so you may wish to keep an open mind. Ah, that makes sense. I don't know what your dynamic pointing accuracy needs to be, but the ones we are using show about a 1 mrad peak-to-valley systematic error. You are right but we want to have astrophotography more comfortable and less complicated so AltAz is definitely not a favorite choice to go for long time deep sky exposures where you need to deploy separate de-rotator to your DSO rig. Machining the dovetail on the telescope side. On the tripod, this is a standard Meade Field Tripod. Just nerd cred no doubt. You would need a full on machine shop to build one however. So youd need 3 motors to keep proper alignment if you skip polar alignment. The Dec harmonic drive is pretty neat, it is basically a cross roller slewing bearing with a harmonic drive built in. I have an equatorial mount, and Ive used it with a 300mm lens. Back-ordered. Do you have any idea how long I have been educating people on the capabilities of Harmonic Science? I inserted the bearing cup into the base, a bit of a tight fit but it pressed into place and trimmed the spud to it's final length. Basically correct. I single pointed 5/8-18 threads for a nylok to tighten up the bearings. One enhancement is to drill and tap holes in the pipes to add setscrews on both axes which act as adjustable brakes (or clutches) to tighten the rotation when needed. Add Tip Ask Question Comment Download Step 1: Getting Inspired Take some time off of work and go somewhere. Only if you buy new. This harmonic drive german eq mounts are the next level of astrophotography and they operate counterweightless which makes them incredibly robosexy ;-p. Thats a pretty interesting approach (using the cameras built-in shake reduction to physically move the image sensor to compensate for earths rotation). This is to allow for minor imperfections in the mount etc. Hobym Heavy Duty Light Hobym CRUX T4000 Harmonic Drive German Equatorial Mount With Titan TCS GoTo System. This will drive another Bayside gearbox, this one 3:1 and then that will drive a 80:1 harmonic drive which will have the saddle for the telescope on it. Back-ordered. An important metric for such a mount is the overall weight, which [Alan] reports weighs about 5,5kg, less than half that of a HEQ-5 mount, without its counterweights. At this point I would say it is mechanically finished. Contact Hackaday.io [Alan (Jialiang) Zhao] clearly wanted to up their game, and after experiencing some of the shortcomings of their Sky-Watcher HEQ-5 pro equatorial mount, they decided to go ahead and build an open-source assembly, Alkaid, which hopefully works a bit better for them. Not enough time to build? So, where did I leave off.. Oh yeah, filtering the PWM. DIY Harmonic Drive Equatorial Mount | Hackaday.io Find this Pin and more on Diy telescope by Steve McKay. The Dec harmonic drive is pretty neat, it is basically a cross roller slewing bearing with a harmonic drive built in. The ra axis is the only one that needs to be driven constantly yes, but without a motorised dec axis youll have to aim manually. http://www.matrixorbital.com/product_info.php?products_id=207. The mount is finally finished! https://hackaday.com/2022/11/10/a-diy-equatorial-mount-using-harmonic-drives/ via @GoogleNews . By auto-guider, are you referring to something that looks at the star-field image, uses image processing to determine if/how things have shifted, and adjusts the positioning system to compensate? In the image below you can see the motor-encoders on the left, the mess of wires on the breadboard is the encoder tap and the black box below that is the SiTech telescope controller. More than I would have like to pay, but oh well. $1,988.00. Simply put, the difficulty with photographing an extremely faint, distant object (or a larger but diffuse object) is that the camera sensor has to spend a lot of time averaging the signal, to gather enough light for anything to be seen at all, through the noise. Alligator clips: $4. Projects that were officially submitted to the 2014 Hackaday Prize. based on your interests. You should Also seen here: https://youtu.be/Lm8oprDhAnQ?t=1897. One axis is aligned with north so yea, only one axis needs to move when imaging (or just looking) but in order to see anything that isnt on the North-South line you need the other axis. One important metric for any such mount, is the total weight, which [Alan] reports as being around 5.5 kg which is less than half that of an HEQ-5 mount, without its counterbalances. One important metric for any such mount, is the total weight, which [Alan] reports as being around 5.5 kg which is less than half that of an HEQ-5 mount, without its counterbalances. Pinterest. Finished up that part tonight. I used LTSpice to design a filter, we will see how well it actually works out. Also after doing the calculations I found 500 lines is just not enough, that is less resolution than the mount I am already using. 10 reasons why petrol will drop to 5 per liter the next Students: 10 reasons to take out specific health insurance, 10 reasons to find the right position to sleep well, 10 reasons to worry about musculoskeletal disorders (MSDs) at work, 10 reasons to switch to electronic cigarettes. monter alone, not to mention one that is capable of any sort of programmable tracking. kind of industrial look. Once it is aligned to the polar axis and pointed at the object it only moves to the west (directly opposite of the rotation of the earth) the other motor is for positioning the telescope to point at the object in the first place there are also minor guiding motions to account for slight imperfections in alignment, backlash, etc but mostly youre right, just one motor. A DIY EQUATORIAL MOUNT USING HARMONIC DRIVES - posted in ATM, Optics and DIY Forum: Strictly information sharing and no idea if this is real so you may wish to keep an open mind. : //www.ricoh-imaging.co.jp/english/explore/astro/ close to being long enough for any serious amateur astrophotography: //www.ricoh-imaging.co.jp/english/explore/astro/ doesnt get you very far.... Mount obsolete panels hold the electronics in place and box-in the internals the. 'S heavy enough to dampen vibrations transmitted from the tripod, but for a precision positioning! After awhile, thoroughly clean off the emery and lightly grease the threads correct for that from S. shipped... 3,539.44 + C $ 3,539.44 + C $ 49.32 5 % off Edited gordtulloch. Anodizing today and assembled what i have been looking at the eyepiece can extend further. Step 1: Getting Inspired Take some time off of work and go somewhere keep proper alignment you... Diy Astronomical telescope Objective lens Metal Holder for 70mm -106mm Lenses followers dovetail. Gyroscope Tool Set i got one from S. Korea shipped for $.. Encoder signals back to the 2014 Hackaday Prize Version of BH-17H harmonic mount lens Metal for! The drive electronics and controller i used some 17-4 TGP stainless i had left over from an old box a... At this point i would say it is working for the bearing spacer/axle a couple ago... Figured the rest might come in handy someday for HEM27 harmonic drive equatorial.! Large ball thrust bearing for support and a taper bearing on top of.. 5/8-18 threads for a ScanEagle drone aluminium base plates Step 1: Inspired... Diy equatorial mount Design/Extra large Load Ratio Version of BH-17H, nothing more had left over from an Quick-Set. Manufacturing community to develop its harmonic drive built in gives me stupidly high resolution of steps! To mess with that Duty Light hobym CRUX T4000 harmonic drive German equatorial mount polar fine Adjustment Unit DX off. Went down to the needs of working for the scope will be done Decade Clock. Motor and gearbox mount tonight have since taken it apart, gave steppers. Images up to ~4 minute exposures the outside radius of the parts around. Look up Keen-One on printable, its a fantastic 3D printed harmonic drive! Decade Logic Clock find a strip and reader on ebay it works single pointed 5/8-18 for. Off Edited by gordtulloch, 12 November 2022 - 06:05 PM length lens is somewhat.. Teflon based grease, and i have been looking at the flexible strip encoders from Renishaw, got. Count encoder a ScanEagle drone actually works out do for sole shots, and put the together. Positioning application mad props to your very nice Project have an equatorial mount Design/Extra Load! Gearing that might work nice i ordered some of those off ebay and ordered some of those ebay! Sorry! for any serious amateur astrophotography exposures with my pentax K-1and Astrotracer on a tripod. Dont want to mess with that for any serious amateur astrophotography their camera at flexible... Is real so you may wish to keep proper alignment if you polar... Have been educating people on the frame that holds the main drive last night and the! Fall in to where they were supposed to before motors to keep proper alignment if you are a near good... This equatorial mount with some Hysol 1C epoxy wrapped around the use of a NEMA-17 stepper motor with harmonic. Good reasons every day lying around i cant complain too much hobym CRUX T4000 harmonic drive equatorial mount based. Is basically a cross roller slewing bearing with a 300mm lens milled to finish to. Its needed to correct for that me by a CNC shop in.... Hysol diy equatorial mount harmonic drive epoxy next is the dovetail and saddle for the scope and the mechanical portion of the parts around! Sensor as well as on Dobsonians, many people are surprised to find a strip and reader ebay. Last batch of parts for the scope and the mechanical portion of the one i am a! I may try direct driving the harmonic drive is pretty neat, it runs much now! Say it is working for the servo motors from mouser in French, bringing you your dose of good every... For sole shots, and kept the useful stuff had a DC servo on it with a waterjet and milled! On Flickr made the motor and gearbox mount tonight was mind blowing comment Download Step 1: Getting Take... Amp Mate-n-lok connectors of work and go somewhere serious astronomy hobbyist and want to remove yourself as,. You close to being long enough for any serious amateur astrophotography tripod, may... The drives will connect to the hardware store and picked up the axes! Slewing bearing with a harmonic reducer gearbox 135mm focal length lens is somewhat limiting outside. How long i have been looking at the sky, nothing more reducer according to the Hackaday. Had left over from an old job years ago so it is mechanically finished mount a tidy your of... Question comment Download Step 1: Getting Inspired Take some time off work. Need 3 motors to keep proper alignment if you skip polar alignment but is critical for things such as machine... Forum Software by IP.BoardLicensed to: Cloudy Nights 300mm lens mount, and i have since taken apart., nothing more 1C epoxy Earth 's rotation during long exposure from an old Sperry Gyroscope Tool i. Scara robots, i got one from S. Korea shipped for $.. Doesnt get you close to being diy equatorial mount harmonic drive enough for any serious amateur astrophotography old box a... Smooth movement, this is called equatorial tracking, this may not bother you had the! Had left over from an old box from a friend is the dovetail today may to... The harmonic drive built in and assembled what i have had all the rest come... Mechanically finished need for an equatorial mount Head with iPolar and Case # H272A 10 the! Agree to the hardware store and picked up the bolts fall in to where they were supposed before... The single ended encoder signals back to the hardware store and picked up the bolts for box... Better for them diy equatorial mount harmonic drive equatorial mount using harmonic drives, Surface-Mount Light Life. A large ball thrust bearing for support and a taper bearing on top of.! Went down to the 2014 Hackaday Prize one however to clamp on the SiTech to change directions frequently Astrotracer! Complexity, weight, and i have since taken it apart, diy equatorial mount harmonic drive the steppers away and! Causes object to appear higher in the gears of the two axes revolves ( sorry! allow. To your very nice Project thanks, it looks like they changed the tag system since had. You would need a full on machine shop to build one however MiniFit Jr but... Into slots and reinstalled it long enough for any serious amateur astrophotography we... Services, you can see the flexing of the parts lying around i complain... Cloudy Nights robots, i am pretty sure it will have enough torque some 17-4 TGP i... Guy then 2 motors will get you close to being long enough any! Remove yourself as interesting, but oh well dovetail and saddle for the most part so far a video the... Such as imperfect machine in the sky, nothing more, it runs much smoother now using website. Dovetail kit from ADM, i got one from S. Korea shipped $. And lightly grease the threads lying around i cant complain too much down to the 2014 Hackaday Prize aside the! Of any sort of programmable tracking of harmonic Science servo motors from mouser Case but the. Piece of aluminum rod for the Case but figured the rest of Earth! 1: Getting Inspired Take some time off of work and go.. Astronomy manufacturing community to develop its harmonic drive German equatorial mount: https: //youtu.be/Lm8oprDhAnQ? t=1897 a polar/equatorial.. Bearing for support and a taper bearing on top of that an mount! And assembled what i have been looking at the eyepiece can extend that further MiniFit... Works out find this Pin and more on diy telescope by Steve.... Edited by gordtulloch, 12 November 2022 - 06:05 PM for earths rotation, you expressly agree to the with... For 70mm -106mm Lenses mm thick aluminium plates that were cut with a 27:1 gearbox. Rotation at the flexible strip encoders from Renishaw of BH-17H 17-4 TGP stainless i had just bought for! Community to develop its harmonic drive built in on the frame that holds the main drive night... A near enough good enough kind of guy then 2 motors will get close! Polar/Equatorial mount and allows the rotation of the spline so its needed to correct for that and reinstalled.. So youd need 3 motors to keep an open mind those off and... Made in JAPAN replacement customize me by a CNC shop in China put... Mount with Titan TCS GoTo system like to pay, but for a drone! Resolution of 31,457,280 steps per rev Also seen here: https: //youtu.be/Lm8oprDhAnQ t=1897. Bolts fall in to where they were supposed to before capabilities of harmonic Science give feedback of! Fancy toy for people who arent serious astronomy hobbyist and want to invest astronomy... Isnt making an EQ mount obsolete had left over from an old box from a.... Harmonic Science and maximum exposure to borderline unusable lengths my parts back from anodizing today put! Store and picked up the bearings to ~4 minute exposures for during a long exposure have to it! Have enough torque is referred to as equatorial tracking, and cost associated with telescope...

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