equatorial platform drive


I then wrapped a small strap of duct tape several times to adjust the … Screw Drive is … This is easy to do. Go anywhere portability, as the Watch House Equatorial Platform weighs only 18lbs and is easily carried in 2 pieces, taking less than 5 minutes to set up and align in the field. Last year it occurred to me that I could also use the equatorial platform with an 11" S-C tube assembly if it were held in a Dobson-type altitude bearing fixture. Blandins Crossbow Equatorial Platforms. Found inside – Page 184The equatorial platforms developed by Adrien Poncet and others have allowed observers to mount large and often bulky telescopes on an equatorial drive . The drive must be reset every hour or so but that is a small price to pay for a ... Mounting your Dobsonian on an equatorial platform is your second option and gives your scope true equatorial movement for an hour or so before the platform needs to be repositioned back to the start. Found inside – Page 218Some experienced observers even let new telescope drives run continually for up to 24 h to help “iron out” any unevenness in ... Refractors used by amateur astronomers are almost exclusively placed on German equatorial platforms in the ... The ThingWorx platform is a complete, end-to-end technology platform designed for the industrial Internet of Things (IIoT). physiology of vision. I purchased it about 2 years ago for an 18" dob, but built a different type of platform - a vertical north platform. The equatorial platform was essential in permitting me to perform imaging with a CCD camera, and I have used it with my 8" Newtonian as well. Thu, 30 Jun 2005 23:06:55 GMT: Bob Cuberl #2 / 6. While building the pulse system controller, a star test was made using a simple voltage reduction, 100ohm pot and a 2.5 ohm 5 watt resistor, the motor voltage was reduce to bring the shaft RPM down to one revolution in 15 seconds, which proved to be too fast. Grab the scope anytime to move around and explore a new area - there are no … The 0.05 uf capacitor on pin 2 and 6 of the NE556 oscillator, requires changing to 0.0056, otherwise the circuit is built as shown. Rotating the scope to capture the image puts a lot of strain on the half nut and drive shaft. But … seems to be a good idea. These platforms will you uninterrupted viewing for an hour before needing to reset which takes mere seconds. Here you see the main mechanics and motor of the equatorial platform. It takes about 15mins from decision point to having the fully assembled scope on the mount – not as quick as the set up for Mr.Orb Inspector but quite doable once you get used to the much increased weight of some of the separate components! The weight of the ota pushes down and the inner tube deflates at the rate you choose with a regulator valve. Anyone using one? Equatorial Platform. The ground board, bearings, and drive mechanism of an equatorial platform. Like the Go-To drive method, it maintains the low, stable centre of gravity of the Dobsonian design. (From Reflections, the Newsletter of the University Lowbrow Astronomers). Now we’ll show you how to complete and motorise the Dobsonian equatorial platform. Location: Manchester. The electronic Motor Speed Pulse System Controller can be found on the Web. Now you can follow the celestial object for about one hour. zombie thread resurrection sorry, but that is quite brilliant  Bit of a pain to have to re-inflate it after an hour and it adds a lot of height but what an ingenious solution- right down to the air damper for damping out the springy vibrations you'd get. although not so much fun to haul around at 53 lbs, or reset by winding the … Notice the 3d printed phone holder attached to the eyepiece. I’ve thus hoped to work on an Equatorial Platform for it. The latin word for 'Sky Stopper' is coelostat, which is used to focus the sun onto a stationary telscope. The method used is not new and has been used by numerous Dob enthusiasts to drive their platforms, the difference being the method I chose to build it. Found inside – Page 57The first platform would be launched in 1996. Smaller "Earth probes" would be launched in equatorial orbits in 1993, each with a relatively narrow mission: tracking the ozone layer, for example, and monitoring rainfall in the tropics. Posted by Dennis Steele at 12:31 PM No comments: Email This BlogThis! filter spectra. Sign up for a new account in our community. Found inside – Page 264The assembly is then placed on a polar - aligned equatorial platform to track the stars during exposures . The mounting base is wired to supply 12 - volts DC to each camera's dew heater and 3 - volts DC to the equatorial platform drive ... It is also very useful for those of us that do not have east west views and have difficulty using the 2 star drift method when drive errors are … Pushing the platform by hand is all that is needed. The platform which allows uninterrupted tracking for up to 80 mins, has been in regular use ever since then. German Equatorial German Equatorial Hybrid AZ-EQ German Equatorial Payload Capacity (lbs) 22 44 30 30 Mounting Saddle V-style D- & V-style V-style V-style Motor Type Stepper Stepper Stepper Stepper Belt Drive Included Polar Scope Mount Head Weight (lbs) 9.65 38.2 16.9 21 Tripod Weight (lbs) 12.5 16.5 13.4 12.5 Drive: Rear wheel drive: Wheels and Tires: 6.5Jx16 F 215/60/R16 R225/60/r16: Propulsion Type (marine) Single GIBBS Amphibians proprietary HSA Water Jet: Lights: Road and Marine Navigation Lighting: E&OE: Additional Features: N/A: N/A . ... Its bearing surface is angled to match the elevation of the pole star (awkward, and easy to lose position/drive). The Ecliptica Pro tracking platform performs as if your Dobsonian was placed on a driven equatorial mount giving much greater stability at high magnifications. Pic 3 shows the completed circuit without the two ICs, made on Vero Board - A circuit diagram is not provided on the Web. This sketch is more of an impression of the moon rather than an attempt to achieve a level of accuracy. The Dob scope is weighty and beyond my years to lift on and off the proposed platform, so a new movable base had to be designed and the equatorial platform would be an integral part of it. I would like to go DC with a direct drive. Here the scope is set up at the Orange Blossom Special Star Party at Alafia River State Park in February 2006. The drive shaft rotated at one revolution in 85 seconds at the slowest speed. Two of the points were aligned on a polar axis while the third was a jackscrew actuator to drive the platform. 22" f/4 lowrider. The completed platform shown in the Image 1 is made with 3/4″ plywood and weighs 18 pounds. The picture on the left below shows this addition. The platform does not need to be turned off while resetting. It works very well at Canadian latitudes, thanks to the arrangement of bearings. 2016 drive update for the 28-inch scope. So I guess the next step was to start a new project, with what very little free time … In the picture you also see a large compass board on the right-hand-side which is used to set up the platform and align it correctly in azimuth. Theory: Basically, an EQ platform rides on a big arc at one end, and a small ark at the other, so that it rotates about an inclined axis. No need to tune it with a knob to get it to follow the Stars, Sun or Moon. Don Peckham's platform Equatorial cradle The Hiss Drive The McCreary Mount Building the McCreary Mount Tom Fangrow: A 'hiss drive' platform Plat-forme equatoriale (a very low and lightweight platform) Daniel Restemeier's platform (German) Scotch mount (Barndoor tracker) Robert Duvall: Barndoor tracker Brian Rachford: A low tech barndoor drive Jeff deTray: Barndoor … They are often used with altazimuth mounted … Bench tests proved most satisfying. Platforms (in the context of digital business) exist at many levels. Moving the motor to the underside of the base plate and fitting pulleys and an O Ring belt drive gave a further 3:1 reduction. Due to weight of the Dobson and the vertical force transmission, the friction is high enough to prevent slipping. As a special offer, these can be supplied with a size #1 Equatorial Platform for +£250. Equatorial Platform Completed The "drive" system of the equatorial platform. Peter Drew's comment on a possible water variant also deserves this thread's resurrection. Looks interesting but I'd feel very deflated if it didn't work, You need to be a member in order to leave a comment. Most platforms, commercial or home-built, are set for one specific latitude, although you can adjust them to ±5° or so by shimming up the north or south end. (We have created an 8-part comprehensive report containing a series of two-to-three page “briefs.” If you would like to see the collection in its entirety, click here.). Found inside – Page 174Equatorial. Mounts. Serious planetary observation requires a telescope to be mounted on a sturdy platform with one axis ... Equatorial clock drives run at a 'sidereal' rate, enabling celestial objects that are centred in the field to ... How can we … If one could stop the Azimuth movement, assuming Mike’s method as described above took care of the declination, for a period of 30 to 40 seconds, I would be able to capture the full selected image of the moon with 300 to 400 frames. I first made a hand operated control, which failed miserably, causing excessive telescope shake. The Dobsonian telescope isn't complete unless you have a tracking platform. I captured 219 frames before stopping the capture. An equatorial platform is a specially designed platform that allows any device sitting on it to track on an equatorial axis. There is also miscellaneous hardware from … They are used to give equatorial tracking to any device sitting on them, from small cameras up to entire observatory buildings. This procedure is very useful during the building of an equatorial platform since no drive is required. Set a Dobsonian on an Equatorial Platform and experience instant motorized tracking! It worked very well at moderate magnifications. The lid to the Perspex plastic box made for the controller is 3mm aluminium and provides the heat sink. I'm wanting to try some very rudimentary astrophotography with my dobs and an equatorial platform. However, to account for the higher weight of the 22" Dobson of 45 kg as compared to the 26 kg of my 14" Dobson, the platform for the big Dobson needed to be … A video of equatorial platform being set up at the 2010 Orange Blossom Star Party. your own Pins on Pinterest The most rewarding part was the success of the first test. But set a Dobsonian on an Equatorial Platform and … However, the Dobsonian has one major drawback -- no motor drive. The ground board, bearings, and drive mechanism of an equatorial platform At least one commercial platform, the Johnsonian Type V, is adjustable for latitude within a wide range. Found inside – Page 181The mounting comes outfitted with the same , sophisticated , dual - axis drive package found on the Losmandy G11 , which includes DC ... Two companies that offer equatorial tables for Dobsonians are TL Systems and Equatorial Platforms . PWM DC Motor Speed Control, by G. Forrest Cook. Found insideIf the drive of the telescope is good enough to give sharp images for a short exposure, then many such images can be ... 2.25 Semi-exploded view of an inclined plane equatorial-drive platform for a Dobsonian-type all-azimuth mounting. Want to change your eyepiece without loosing the observed object? Found inside – Page 1093Thus , the azimuth transformation resolver causes the pickoff signal to drive the correct gimbal regardless of the heading . ... The pitching motion will have a vertical component and the rotation of the stable platform about the ... The mid-1960s saw the introduction of the Russian AFU-75 satellite-tracking camera which consisted of a 3-axis altitude-altitude-azimuth mount mounted on a three-point equatorial platform. The equatorial approach. The platform is powered by an RB35 1:600 geared DC motor (Conrad electronics) and a 1:20 worm drive and a steel drive shaft driving the platform by friction. The cables providing 12 volt power, from a small rechargeable lead acid battery and to and from the hand held control box, are colour coded RCA connectors  - old stereo sound cables - The Illuminated Finder Scope and Laser Finder - both described in previous IceInSpace articles, and the cooling fan are all powered from the same source with suitable voltage regulation. Found inside – Page 1093Thus , the azimuth transformation resolver causes the pickoff signal to drive the correct gimbal regardless of the ... The pitching motion will have a vertical component and the rotation of the stable platform about the pitch axis will ... As this motor turns it causes the top rocking plate (and the telescope that sits on it) to move equatorially. Found inside – Page 184... major drawback – it has no motor drive. You have to push it around the sky. And for some, that can get to be a hassle. But what if you were able to perch your Dob on an equatorial platform and experience instant motorized tracking! Wheel kits are available to allow the telescope to remain on the platform and stored when not in use. Winter Springs, FL 32708. The entire telescope and platform can be rolled out and lowered off the wheels for use and easily rolled back for storage. The Single-axis Platform drive utilizes one stepper motor which is mounted to one of the north roller bearings. Found insideKnown as a Poncet platform this is, essentially, an “equatorial platform” on which can be placed a Dobsonian or similar mounting (see Figure 6.6). ... Astronomical Equipment for Amateurs Electronic Drive Design 89 Unusual Mountings 91. (I'm aware of a couple of vendors of lower-cost platforms but they are DIY kits or require finishing of the plywood etc.) I then broke it up for firewood when I brought my GOTO mount. Equatorial platforms. Most platforms, commercial or home-built, are set for one specific latitude, although you can adjust them to ±5° or so by shimming up the north or south end. The drive shaft turns approximately twice in 40 seconds. 28 inch f4 alt-az photo and design page - updated December 2018 . Its contact point moves towards or away from the pivot (cone apex) as it rotates (awkward, requires longer rollers). I've made one. See Equatorial Platform Dob Tracker Drive Design The amount of force /power required to drive the scope is related to the amount of out of balance. It was fun to make, and a joy to use for ten years and more . The platform itself is well constructed and obviously built by a craftsman. The entire telescope and platform can be rolled out and lowered off … Tom . Found inside – Page 43There are several ways of correcting the drive rate of a camera platform or telescope , including : G - CLAMP MOVABLE BOARD TO POLE WOODEN ANCHOR BLOCK WS ... All equatorial camera platforms must be aligned on the celestial pole . Multi-disciplinary construction! Although the simple arranged drive would stop the Right Ascension, it did not stop the Declination and to achieve what I had hoped for it was obvious that an equatorial platform was the only way to go. The platform is compatible with all popular models of Dobsonian telescopes with apertures up to 12" and weight up to 50kg. Astro Optik Martini Equatorial Platform Size 1 For. Build an equatorial platform to take pictures of the nightsky, using … An equatorial platform or equatorial table is an equatorial telescope mount in the form of a specially designed platform that Also four levelling legs sliding in square steel tubes for total rigidity are fitted to each corner of the base unit, allow the platform to be levelled. Found inside – Page 58Since the drive site at the platform is 21.6 km from the center of mass , angular momentum is alternately added and taken ... ( In equatorial orbits , a few days / month ; in 20 ° orbits , a few days in every 80 for the orbits we have ... From early 2014 have also successfully used my 18″ Dobsonian, Fossil Light, on the platform for many imaging sessions. I feel this modification is very important. An equatorial platform mount can be used to rotate an entire observatory building. All assembled and ready to use. For a 6-8" scope (the sweet spot for quasi-beginner, portable reflectors) the platform would likely Here is the platform in operation. turned on the equatorial platform drive and now I was ready to observe the moon and sketch. Found inside – Page 77Many telescopes are mounted on an equatorial mount and may also come equipped with a motor drive for one or both axes. ... If you prefer tracking only, your Dobsonian can sit on top of a tracking platform that allows it to keep any ... Sure it could work well with only… High Capacity With a weight capacity of up to 225 lbs, the EQT-150SC and EQT-225SC platforms can handle some of the biggest Dobsonian telescopes available. Astrophotography is possible with a Dobsonian and equatorial platform!. The compass board uses an oil-filled ship’s compass I bought at a bargain price in a car-boot sale on the Isle of Wight. I used  IRF 540N. an equatorial platform drives from one side of a conical section to another. My platform is going to be a VNS type platform. In direct drive, a motor turns one of the wheels directly.
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