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Dobs, 3D printing, and optics...
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Hello knowledgeable OAFs: Soooo, let's start with the fact that I am NOT Mr. Handyman. But I did recently get a 3D printer, and my goal for 2023 is to build my own scope of some sort.? I found a decent layout for a Newtonian reflector, can get it down to a simple 6" to try with a lot of 3D printing of the parts/trusses, etc, BUT obviously ordering the mirrors. I am not particularly interested in grinding my own mirrors, etc., so willing to order a package for that. Agena has a combo that is recommended (out of stock at the moment) for $220. Plus a Crayford focuser for $115. Then there are assorted other parts, screws, etc. By the time I'm done, I don't think it will be a lot cheaper than just buying one hehehe. However, I guess I was wondering if people had thoughts about building a small Dob that would push me one way or another. Here's the link to the 3D printer setup (free files are good). I guess I'll still have to build a wooden base for it.? I'm not wedded to it. I confess I would MUCH rather do something with a Mak design similar to the Sarblue commercial version. I'm almost tempted to buy one and rip it apart for dimensions. :) Paul |
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I shall be interested to hear how your 3d printed scope turns out,
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since I would not think to do so. I've been 3d printing for 6 years. I've printed hundreds of things. Most of them were telescope bits. In my experience, 3d printing is the best way to get custom parts that don't need to small and strong at the same time -- provided you can't buy them. If you can buy them, its usually cheaper as faster than printing. Quality non-brittle (i.e. *not* PLA) filament isn't cheap. Parts that take 12 hours to print are not rare. Most of the work is designing (and re-re-re-designing). Huge effort is saved if you can use someone else's design files. But I'm skeptical that the 3d files you like would result in a scope that would hold collimation. But it would be fun to be proven wrong. If you do decide to print those parts for that scope, I suggest you feel free to iterate the design and customize it to be exactly what works best for you. Customization is the power of 3d printing. clear skies. -ad On Tue, Dec 13, 2022 at 2:36 AM PolyWogg <thepolyblog@...> wrote:
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开云体育This one got a ~1.3 page write up in the Jan 2023 Sky and Tel and was reviewed quite favourably. Rick On 12/13/22 14:08, Steve Attfield
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In my internet travels I did see this design that might be of interest if you haven't seen it yet. As a bonus, it appears to have a bit of a community which I find is very useful for big projects? |
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Paul, I’ve still got three 3D printers (gave one to my brother recently). I’ve used them to print a few things for astronomy, but more importantly I think for you is I also had the chance interview on astronomer who 3D printed a whole scope! The video is very interesting insights to the whole process and hopefully give you an idea of what you are looking to get into. Overall, expect to spend a lot of time tweaking the printer and the prints to get everything perfect, but once you make one, making another ten would be relatively straightforward. This website by TechingTechYT is by far the best tools for setting up and calibrating your printer once you’ve gotten past the first print. Highly recommended. Regards, Graeme On Tue, Dec 13, 2022 at 2:22 PM R WAGNER <rick.wagner@...> wrote:
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Graeme Hay Photographer / Cinematography / Astroimaging EmberSkyMedia.com |
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