Search the Community
Showing results for tags '3d printing'.
Found 3 results
Hi All, just thought i would show the results of a little project. I have been guiding with my Orion Mini Fifty with great success using a ED80 F7.5 scope to image through. recently though i wanted to get a little closer to some of the objects coming up in the summer sky. M13, M3, M33, M27, Cygnus wall, m101, wizard nebula... etc etc the list goes on. I will be trying with my 2x barlow giving a focal length of 1200. Which should be OK guiding with my mini fifty, but i wanted to try and match the pixel ratio a bit better to see if it helped, BUT i cannot get focus on the mini fifty when i use a 2x barlow on that... i can screw the barlow lens directly to the end of my QHY5ii_L mono but the focus point puts the camera about 1mm out of the back of the tube. TOO CLOSE to use a barlow as an extension tube because of the internal shoulder.... hmm dilemma. Now i am a product designer so to the drawing board i went....well to Sketchup anyway. Money is always tight so an aluminium turned part was out, but a rigid plastic 3d printed part was on the cards. And as luck would have it, my work bought a new SLA 3D printer (Form2) from form labs) capable of printing to 25 micron resolution. I thought Christmas had come early! attached are images of the final part attached to the rear part of the Mini Fifty, ready to be screwed in place. Not sure how i managed it but i got the tolerances right first time....and measuring the rear part with a ruler. fitting diameter to slide over the rear part of the min fifty = 42.25 diameter. fitting for the camera (1.25") = 32.5 diameter. as you may have noticed i will need to add 3 x M3 threaded inserts to the back end of this to clamp the QHY securely in. i can post images after this is done. if anyone wants this model i can provide it. None of the internal/external detail is needed really, but this was to see what the Form2 could do. And i can say ........it is amazing. (for everything but closed cavity printing. clear skies everyone.
To encourage and assist amateurs interested in making 3D printed spectrographs, we will prepare a web sub-group for them. There are at least four concept designs being discussed - Paul's "LowSpec", John's "Littrow", Christian's "UVEX" and Tony's "TRAGOS". https://groups.io/g/astronomicalspectroscopy You are more than welcome to visit and check out this exciting new development in amateur spectroscopy.