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OpenAstroTracker: 3D printed, open source star tracker

openastrotech.com

11–20 of 52 posts

Re: OpenAstroTracker: 3D printed, open source star tracker

#11
post #6

This is pretty cool. Can the parts also be made with a laser cutter? The astrotracker appears to be a bit bigger than what i'm looking for: A DIY alternative to the Omegon Mini Track LX2/LX3.

I see that device is mechanical, didn't know that existed, that's quite cool! Is there an advantage to it not requiring electricity, though, or is it just the cool factor?

Re: OpenAstroTracker: 3D printed, open source star tracker

#12
post #10

The kit costs over 200 bucks. I've been very causally considering whether to get into astrophotography, so don't yet know anything about it but I'm curious: what makes this so expensive? A printed frame is cheap, and the other major component is a way for it to automatically move. Are the motors the expensive part then, because they have to be so precise?

A couple of hundred bucks seems pretty reasonable.

You have to source all the parts, make sure they work together properly and assemble the kit.

I mean $200 isn't a lot of money for something you'd potentially get years and years of use out off.

Re: OpenAstroTracker: 3D printed, open source star tracker

#13
post #10

The kit costs over 200 bucks. I've been very causally considering whether to get into astrophotography, so don't yet know anything about it but I'm curious: what makes this so expensive? A printed frame is cheap, and the other major component is a way for it to automatically move. Are the motors the expensive part then, because they have to be so precise?

I personally DIYed mine and it took a lot of tinkering to get a reliable setup. The kit is very well polished and uses the new NEMA steppers. As for pricing, I think it includes 20% VAT, which I assume is removed if you are not in the EU. I personally have spoken to the creator and they have tried very hard to make it as low cost as possible.

If you have a 3D printer and live in a country with decent hardware suppliers (not the case for me in Australia), then sure go ahead, DIY and save money. But for people who want an almost ready to go solution it's very well priced, considering commercial alternatives are well into 500+ for the feature set that this mount offers (GoTo, optional guiding down to 1" accuracy).

Re: OpenAstroTracker: 3D printed, open source star tracker

#14

To whomever authored the title: it should read “open source; built with 3D printed parts” I’m always on the lookout for neat things to 3D print. The current title is deceiving in that you cannot fully 3D print the whole thing. It looks cool though!

Hmm while I see your point, I was going for conciseness and I think it's reasonable to assume that extra parts are required - we can't quite print stepper motors at home yet! The rest of the basic requirements is nuts/bolts (standard kit stuff), and a $5 microcontroller[1]. (Things like the aluminium base can also be 3D printed, but it's not recommended for stability. There are lots of optional components that greatl…

I think GP's point isn't off the mark here, but also that the title doesn't need to be altered. There's no need for any additional electronics to construct a Dobsonian and mount capable of manually tracking DSOs, for instance.

I say this as someone who uses "computerized" and EQ mounts, but I also assumed from the title that this was a completely 3D printable project (sans mirrors, I can print my own washers and bolts), which is way more exciting a prospect than having to buy or put together a fairly complex kit, just not all of it if you have a 3D printer.

I just 3D printed a custom IR CCD mount for my CST, but I'm very interested in adapting this to some of my designs, so thank you for sharing!

Re: OpenAstroTracker: 3D printed, open source star tracker

#15
post #10

The kit costs over 200 bucks. I've been very causally considering whether to get into astrophotography, so don't yet know anything about it but I'm curious: what makes this so expensive? A printed frame is cheap, and the other major component is a way for it to automatically move. Are the motors the expensive part then, because they have to be so precise?

A couple of hundred bucks seems pretty reasonable. You have to source all the parts, make sure they work together properly and assemble the kit. I mean $200 isn't a lot of money for something you'd potentially get years and years of use out off.

Sure, but my question is why it carries this price tag, not whether I'll get years of use out of it.

So if I understand your comment correctly, it's the R&D (making sure all parts work together correctly) that decides the majority of the price here, not one of the actual components?

Re: OpenAstroTracker: 3D printed, open source star tracker

#16
post #10

The kit costs over 200 bucks. I've been very causally considering whether to get into astrophotography, so don't yet know anything about it but I'm curious: what makes this so expensive? A printed frame is cheap, and the other major component is a way for it to automatically move. Are the motors the expensive part then, because they have to be so precise?

I personally DIYed mine and it took a lot of tinkering to get a reliable setup. The kit is very well polished and uses the new NEMA steppers. As for pricing, I think it includes 20% VAT, which I assume is removed if you are not in the EU. I personally have spoken to the creator and they have tried very hard to make it as low cost as possible. If you have a 3D printer and live in a country with decent hardware supplie…

So if I understand you correctly, it's the R&D that makes up the majority of the price, not the components?

Not saying that's bad, just that my question is what makes this cost what it does. If it weren't justified, there'd be competitors doing it way cheaper (the field is accessible and large enough for that), so it's just a question out of curiosity.

Re: OpenAstroTracker: 3D printed, open source star tracker

#17
post #16

Earlier quoted context omitted.

I personally DIYed mine and it took a lot of tinkering to get a reliable setup. The kit is very well polished and uses the new NEMA steppers. As for pricing, I think it includes 20% VAT, which I assume is removed if you are not in the EU. I personally have spoken to the creator and they have tried very hard to make it as low cost as possible. If you have a 3D printer and live in a country with decent hardware supplie…

So if I understand you correctly, it's the R&D that makes up the majority of the price, not the components? Not saying that's bad, just that my question is what makes this cost what it does. If it weren't justified, there'd be competitors doing it way cheaper (the field is accessible and large enough for that), so it's just a question out of curiosity.

Not quite - if they priced in all of the dev effort required to make the mount software compatible (ASCOM, etc) it would be much higher I think. From what I see, ensuring the 3D printed parts are up to spec and look good cosmetically requires a lot of time, not to mention manually wiring and flashing all the electronics.

Re: OpenAstroTracker: 3D printed, open source star tracker

#18
post #10

The kit costs over 200 bucks. I've been very causally considering whether to get into astrophotography, so don't yet know anything about it but I'm curious: what makes this so expensive? A printed frame is cheap, and the other major component is a way for it to automatically move. Are the motors the expensive part then, because they have to be so precise?

I’m DIYing one for radio astronomy, mostly as a learning exercise, and have about $400 in it. I wanted to try direct drive, which requires larger motors and controllers, and the costs just add up unless your entire goal is to keep it under some amount (at which point you spend more time engineering cost out of it than features into it).

Re: OpenAstroTracker: 3D printed, open source star tracker

#19

Earlier quoted context omitted.

Hmm while I see your point, I was going for conciseness and I think it's reasonable to assume that extra parts are required - we can't quite print stepper motors at home yet! The rest of the basic requirements is nuts/bolts (standard kit stuff), and a $5 microcontroller[1]. (Things like the aluminium base can also be 3D printed, but it's not recommended for stability. There are lots of optional components that greatl…

I think GP's point isn't off the mark here, but also that the title doesn't need to be altered. There's no need for any additional electronics to construct a Dobsonian and mount capable of manually tracking DSOs, for instance. I say this as someone who uses "computerized" and EQ mounts, but I also assumed from the title that this was a completely 3D printable project (sans mirrors, I can print my own washers and bolt…

Oh sure, but in my defence a simple Dob eq platform hardly requires any software, so 'open source' would be a strange thing to point out ;) A lot of the hard work is the custom PC software & getting it ASCOM compatible for autoguiding, etc.

Re: OpenAstroTracker: 3D printed, open source star tracker

#20
post #15

Earlier quoted context omitted.

A couple of hundred bucks seems pretty reasonable. You have to source all the parts, make sure they work together properly and assemble the kit. I mean $200 isn't a lot of money for something you'd potentially get years and years of use out off.

Sure, but my question is why it carries this price tag, not whether I'll get years of use out of it. So if I understand your comment correctly, it's the R&D (making sure all parts work together correctly) that decides the majority of the price here, not one of the actual components?

It seems like there is a lot of human work as well (print the parts, pack it, ship it, customer support…).

I wouldn't do this for random internet people for less.

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