3D printed tilt mount for Ca K filters

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christian viladrich
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3D printed tilt mount for Ca K filters

Post by christian viladrich »

Hi ,
Here is the triple-stack system I use :
http://astrosurf.com/viladrich/astro/in ... unt-TS.jpg
http://astrosurf.com/viladrich/astro/in ... t-TS-b.jpg

The top one was done by a mechanist. Unfortunately, he does no longer work for amateurs. So, I made the two other tilt mounts with a 3D printer.

Here are the files (STL and also FreeCad) :
http://astrosurf.com/viladrich/astro/in ... ale-v2.zip

PETG does the job. Still it is a bit flexible, threads are not great. Aluminium would be better for sure.

Minimizing back focus was important for me. It is only 20 mm for each mount. I am thinking of talking with Rafcamera to have a professionally made aluminium. But ...I am currently busy with other stuff.

I also tested a "micrometric version" :
http://astrosurf.com/viladrich/astro/in ... e-tilt.jpg

Still the "hand operated" version is faster to set up.

The filters are tilted on Ca K using the spectro. I've also tested "visual" tuning. It is a bit less accurate. There is probably a learning curve there. I put some stickers on the mounts to identify the best position from one day to the other. Still, it depends on temperature. So if there is a too large temperature change (> 5°C), I need to use the spectro again the tilt the filters with the right amount.

For the Alluxa 0.1 nm filters, I find it best to start by tuning the filter whose CWL is closer to Ca K, then I tune the other.

Christian


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marktownley
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Re: 3D printed tilt mount for Ca K filters

Post by marktownley »

Thanks Christian.

It would be good if Raf did an aluminium version.

Mark


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Re: 3D printed tilt mount for Ca K filters

Post by marktownley »

christian viladrich wrote: Sat Dec 09, 2023 4:52 pm Here are the files (STL and also FreeCad) :
http://astrosurf.com/viladrich/astro/in ... ale-v2.zip
Hi Christian, the link does not work :(


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Re: 3D printed tilt mount for Ca K filters

Post by marktownley »

marktownley wrote: Sun Dec 10, 2023 5:23 pm
christian viladrich wrote: Sat Dec 09, 2023 4:52 pm Here are the files (STL and also FreeCad) :
http://astrosurf.com/viladrich/astro/in ... ale-v2.zip
Hi Christian, the link does not work :(
Ignore me, it does! :oops:


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