My turn at Printables contest

I don’t think I fit that one “we would like to see the entries be as close to completely printable as possible”. I hope there is a better fitting category soon.

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@vicious1 consider submitting most accessible printable aesthetically appealing V1E project. Others have submitted models that are not 100% printed.

Your project entry may not win, but the Makers who discover V1E and end up making your project(s) will benefit.

Submitting will help other makers become aware of V1E projects that they’ll enjoy discovering and making.

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Also think you should, nice free prom for your damned great hard work…

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For mechanical marvels they say:

For this competition, we are going to be looking at aesthetics more than function. A moving sculpture is more interesting to us here than a very bland-looking mechanical machine with a job.

This pretty much kills my interest in this one, because to me the function is the aesthetic.

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Hi Jamie,
I’ve started printing a few pieces from your openscad files… thanks for the parametric parts. :slightly_smiling_face:
I had purchased a D150F750 mirror set last summer and just got around to starting on it.
We’re using a chunk of leftover 6" drain pipe, decided to the spider on the flared end.

Anyway, this is cool man! Nice work.

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Hi Jamie, I was trying to figure out how the length calculation works

𝐿 = 800 − 77 − 113/2 = 666.5 mm length

my 150mm primary mirror only fits the flared end of the pipe 170.6mm OD and 159.6mm ID
the non flared end is 159.6 OD and 148.6 ID.

The 750 focal length should be the same regardless of diameter of the end the spider is on correct?
the OpenSCAD file is giving me different lengths to cut the tube and I’m hoping to only cut once :grin:

The 750 focal length is independent of diameter but after the light bounces off the secondary mirror, it must travel the radius of the tube and then an additional length to form an image outside the outer diameter of the tube. If the focal length and tube length are fixed and the radius increases, then the distance from the outside of the tube to the focal point will get shorter.

My hope was for the accessories like the camera mount to be universal independent of mirror focal length or diameter, so I want the distance from the outer diameter of the tube to the focal point should be constant.

Therefore, as the radius increases, the tube length (and distance from primary to secondary) must be shorter by a corresponding amount so that the focal point is always at the same distance from the outer diameter of the tube.

If you have a tube with a variable diameter then for the length calculation you would use the outside diameter of the tube at the point where you are drilling a hole for the light to bounce sideways to the viewfinder.

Curious what’s the largest scope anyone made using Jamie’s design?

Looks like an interesting Nova event is likely to happen this year…

https://blogs.nasa.gov/Watch_the_Skies/2024/02/27/view-nova-explosion-new-star-in-northern-crown/