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- เผยแพร่เมื่อ 28 ส.ค. 2024
- This is just the introductory video of my home built GoTo Dobsonian Telescope running on OnStep. This was the best usage of Covid-19 lockdown. But lockdown also caused problems in availability of parts, and shipping times. More videos to follow...
- วิทยาศาสตร์และเทคโนโลยี
Very refreshing to see the experimentation with a single truss. I'm not sure what the material of the truss in your build is, but I can definitely see a slightly larger diameter carbon fibre or even aluminium truss being stiff yet light
Thanks for your comments 😃. Yes, this truss is not an ideal/great choice; better would be to use a double diameter Aluminium tube, or a nice studry CF tube, as you mentioned.
Great work , Requires lot of passion and patience.
Thanks Urveen for your appreciation.
Yes it does require 3Ps that includes PERSEVERANCE too as it involves lots of brain storming, designing things, and lots of trial and error. Fortunately, I had/have a fourth P too... that's me Pinak😂. But, at some moment, one can get discouraged by challenges , and might think of quitting it entirely..! I literally designed one part each day, 3d printed it, tested it, and then let my brain rest for that day whether I succeed or failed with the design, so that I can think of another design/part next day. Thanks again 😊
Amazing work sir
Thanks for your encouraging words :)
That is a true work of art! Congratulations.
Thanks 😊👍
very nice Pinak!
Thanks for your encouraging words, Dan 😊
Nice work! I'll be grinding out a 12.5" primary mirror soon and then building a telescope to house it. Ideally I'd like it motorized and this gives me some ideas. Initially it wont be, but will be something I design in later.
Thanks. Good Luck for your built 😊👍 BTW, it's great that you can grind your own mirror. I thought for the same, but then realize that it could cost even more here in Canada, so I ordered it from Agena Astro.
Very good 👍⭐👍⭐👍⭐
Thank you 😃👍
But if 3d printing and wood was your method of building, why go for a single truss? Surely you have a lot of wiggle on this, whereas a spaceframe style would have made it far more stable
Well, It was just for experimentation and fun. It does wiggle, but not a lot. Good for visual purpose, and I did some Astrophotography as well of planets. I have ES 8" Newtonian, and 2 APO refractors as well. So this one is just for fun.
Wow! That's truly awesome...
Thanks..!
The single tube 'truss' is intriguing. Does is function without any wiggle at all? Obviously you minimized the top assembly to reduce weight but I still have to ask if it's as good in function as in appearance. A beautiful piece of work.
Thanks for your comments, and interesting question 😃👍
Well, depending upon the thickness of the truss, it can wiggle a little, more, or not at all. In this scope, 1 inch truss is used. More over, I have embedded about 10 inches of the truss in to the wooden plank of altitude axis (plus the truss's end is bolted down). That makes it rigid, and leaves less room for it to wiggle. So it does wiggle, but only when jarred accidentally. Otherwise, observing, slewing or tracking doesn't make it wiggle. It is a good scope for viewing, but for long exposures, more stability could be added. Making it was a true fun, learning, and some experimentation too. It definitely can be improved --- simply more learning and more fun 😊
Excellent engineering! I have watched many of your DIY drone videos, but never knew you can build this too! Brilliant job 👍.
Can it keep following the stars, planets, galaxies for the purpose of photography?
Hi, thanks for watching and commenting. Yes it can take excellent resolution pictures of Sun, Moon and some planets as long as exposure time is short, as long exposures can result in to blurry images due to Field Rotation - because of the rotation of the Earth itself. For long exposure photography this type of mount is not enough. It needs to be mounted on Equatorial Wedge to negate the effects of Earth rotation. I am thinking to make one wedge for this telescope, but no sooner.
Wow, very nice telescope sir, you are an engineer
Thank you very much Mina 👍
WOW!! Amazing job!! 😳😍
Thank you very much :-)
It's very pretty. I wonder why no one else builds telescopes this way.
Sympa
I think, Sympa means Nice in French. Thanks :)
Wow 👌
Thanks Tejas & Janu 👍. Looking for the best time to have a backyard Astro-party 😃
Wow..Thats Amazing
Thank you 😊
@@pinakoza Your Quiet Welcome,And Well Deserved,This May Be The Single Most Piece Of Astronomy and Or Astrophotography Masters Of Art I Have Ever Seen..Just Brilliant ❤️🙏🏻✨🌏🔭
@@PafMedic Thanks again for your very encouraging words 🙏👍. I watched and enjoyed some of your nice videos, esp. the Moon and Sun rising through telescope😁👍
@@pinakoza ,Oh Wow,Thank You Very Much,Would Be Nice To See Either 1 Anymore,I Havent Made Any Video For Some Time😥
Very nice sir you are talented
Thank you Ammara 👍
Very cool. If it holds collimation well, now I'm thinking that perhaps a single carbon fiber pole to hold the secondary and focuser is possible on an equatorial horseshoe mount version of your design.
That's definitely a good idea. Just need to figure out the diameter of CF pole needed for such design 👍
@@pinakoza I have two 1" CF tubes that are cut to one meter, oddly. Hard to find longer than that at a somewhat good price.
Very impressive! I have a 13.1 inch f4.5 Dob. This is something I have been considering myself, with junk I have laying around. What's that 5 axis controller pn? (it appears to be 5 axis with you using 2. I aslo like the homemade worm drive, I see you did it in sections and some imperfections. How much does it affect tracking? I was thinking the same but with the track (corian (sp) or teflon?) but mounting it smooth and driving it with a tap to cut threads at say 1/4mm at a time cut... repeat 4-8 times (as needed for correct depth). With a good matched tap and die I would think this method, cutting both gear and worm, would make a very smooth drive without much/any correction. needed.
Your advice/help communication would be greatly appreciated. I could give you some telescope time at 32n 96w with a 8" sct if interested. With that said, old retired and working out things. Astronomy on and off since 1971.
Good job and clear skies.
Thank you very much for your interest and comments. The five axis controller is FYSETC S6 v1.2 - the 3d printer controller. Yes, due to the volume limit of my 3D printer, I had to print gear/s in pieces. But it doesn't substantially affect the pointing and tracking even at magnification 0f 83x (1500/18mm). It always performs GOTO functions, and points correctly at the objects. Any errors it has is just because of minor dimensional imperfections (micro expansion or shrinkage while 3d printing) in 3d printed gears, their alignment, and friction among PLA (Poly Lactic Acid) parts. Silicon grease is working good to reduce the friction among worm-gear. My purpose for this scope is live viewing and photographing planets with short exposure, so long time exposure is not expected from this scope. For that I am using Skywatcher Staradventurer mount with DSLR. Your idea of self-cutting worm-gear is excellent 👍
Also, thanks for your invitation for telescope time :-). BTW, I live in Toronto. I watched your FPV videos and they are excellent. I subscribed to your channel as I too doing aeromodelling since grade 7, and DIY drone flying since 2011.
Amazing Sir 👌
Thanks 👍
great video! I was thinkig doing something similar with a 8", where did you get your 12"?
Thanks :). I got it from Agenaastro
how on earth do you collimate the primary without a central doughnut mark i wonder, lol. Other than that, hats off for the quality-capabilities / cost ratio and just for designing and engineering the whole thing.
Hi Bill, thanks for your nice comment, and a truly good question 😊. But for that collimation problem, I worked out in a little different and creative way rather than marking a donut on my Primary mirror itself.
The primary mirror is covered with the protective lid. I found out the center of the mirror, and the lid, and marked it on the lid. Then I 3d printed a yellow star shape with a dent in the center (where actually the center of the mirror is located underneath). When collimating with a laser collimator, I adjust the secondary mirror until the laser falls in the center dent of a yellow star. Then I open the lid and expose the mirror, and complete the collimation. That gives me near precise collimation for observing. I hope you liked my idea. Pictures shared in the link below 😁👍.
photos.app.goo.gl/A49idJC11JfRkScbA
photos.app.goo.gl/vDc1bJeVm4ZjmY1f6
for more pics.
Mark can be easily done if you cut a paper circle of the same diameter with a hole in the middle. Put that paper circle on a mirror and paint a dot through the central hole with permanent marker.
Well done.
Thanks :)
Beautiful telescope I would upgrade the focuser to a Moonlite. Clear Skies. 🔭
Hi, thanks for your nice appreciating comment 😊. You are correct about focuser. This modified focuser is no good here. Actually I wanted to buy low profile GSO focuser, but it was not available (because of Covid-19) when I built this telescope! Now I am looking forward to buy one soon 👍.
@@pinakoza The telescope you built is awesome. When I saw the video and looked at the focuser I thought that popped into my head is adding a moonlite focuser to it.
I purchased one a few years ago for my c8 sct and it's really nice.
Enjoy your telescope!
@@horaciodortona574 Thanks again, and for your suggestion too :). Well, I did visit Moonlite - focuser.com website, but couldn't find any 2" LP Crayford focuser for Newtonian telescope! Anyways, I will keep an eye on it.
@@pinakoza Best of luck to you 👍
@@horaciodortona574 Thanks :)
Hey, this is great.
How can i get in touch with you, if you can share some more light on the same.
Hi Akshat, thanks for your comments. To get more idea about it, please go to this link
photos.app.goo.gl/vDc1bJeVm4ZjmY1f6
Hi can you provide the 3d printed worm gear files?
Hi, thanks for your interest. Please give me some time as I need to find out the files and upload on Thingiverse. I haven't used Thingiverse since long due to problems with its website, but since a month now, I have started using it.
Amazing !!
Thank you very much!
Did you upload the gear plans to Thingverse? I would like something like them.
Hi, no I don't use Thingiverse anymore as it is already broken. Not working for me atleast!
github.com/chrisspen/gears
Which gear are you interested in? BTW, I took help of this tool to design my gears. If you need help, let me know.
Is deep space astrophotography possible ?
It tracks very well; I only do visual or quick planetary photography with it. Deep space requires a little more tweaking and tuning with it. For photography, I use another telescope.
Also, for such a powerful telescope of this big focal length, I need a camera with a larger field of view like ASI2600, but I don't have it now.
And most importantly, deep space photography needs long exposures (in several minutes), and thus needs Equatorial mount to counter the field roatation. This one has Alt-Azimuth mount, whic is not recommended for such photography.
@@pinakoza Thanks ❤️❤️❤️
Can you by any chance share the modeling for 3D printed parts
There are many parts. Are you looking for any specific?
@@pinakoza the gears and stuff
@@dedskin1 Let me check how to share with you!
@@pinakoza you dont have to over stress your self , its not that important , if you have it handy you can We Transfer it and just give me link , if not its no problem
@@dedskin1 Hi, can I know your email address?
no inglesh?
Only English for now. Sorry for that!
No manners?
Nice job, how about some more construction details ? Music, I'd skip ! Prefer hearing your Voice !
Thank you very much.
Music is my huge mistake! But now to remove it, I need to edit a lot! BTW, details and discussions on this build can be found here -
onstep.groups.io/g/main/topic/83728299#35123
Detailed build pictures are posted here -
photos.app.goo.gl/vDc1bJeVm4ZjmY1f6
You have the same theme music as this guy:
th-cam.com/video/MgvVEj47R9I/w-d-xo.html (skip to 18:32 just hear the music).