https://www.skyatnightmagazine.com/advice/how-to-build-a-dobsonian-mount This two-part project aims to deal with this inconvenience. And with the addition of some software on a laptop, I am able to tell the scope to look for a particular object in the sky, and it will automatically find it and point itself at the object. If you are handy with the jigsaw, and want your mount to be lighter and easier to transport, you can cut out the mount like on the picture below. Use the calculated values and plans to mark out the segments you need on the plywood. Also be aware of our Sawing, Barn Door Mount . surfaces should be sealed except those that will have laminate glued Dobsonian Master Index, Page last revised on Mark Parrish is a consummate craftsman. After measuring the diameter of our output gear, we can work out how many times per minute it must turn to create the required movement. The south bearing assembly can be left to freely move or pivot on the base as it is only supporting the load vertically. provide many dimensions as formulas with the specific of your tube Their wide optics can also cope with high magnifications, but it can be tricky to keep celestial targets centred in the field of view in this situation, especially if – as is most common – your Dob has a manually operated altaz mount. We have documented our build with downloadable photographs available from the link at the top of this article so you can replicate the parts, but because your choice of drive motor and power supply could differ according to circumstances and availability you may have to adapt the design a little to suit your kit. Telescope Observing Stool. I must admit I cheated and bought the focuser off the Internet. Like the tube, the choice of finish is up to you and your taste. Shape the wooden blocks using a plane or saw set to appropriate angles. In this section we will show you how to build a Dobsonian Mount After separately weighing your telescope and mount/base, balance the base on an offcut of tube to find its centre of gravity. See more of his work at buttondesign.co.uk, How to photograph the Moon with a digital camera. we described in the previous section. In 24 hours this is only slightly more than one full revolution (360°), so in one hour the platform should turn 360/24 = 15°. The hole in the front board is optional, this way it is easier to carry the mount. some floors). Cutting out the plywood parts is quite straightforward, but the curves do need to be smooth. We will not go into any further detail on finishing the mount as Whenever possible, we In this section we will show you how to build a complete Dobsonian Telescope. Calculate the combined centre of gravity using the spreadsheet calculator included in the folder here. 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