Attacking vibration in Hill Mount v3
Telescope mount v3 is pretty good, but it still wobbles slightly. If I touch or move the telescope, it wobbles a bit before settling down in 2-3 seconds. Before it settles down, Saturn turns into two images of Saturn next to each other.
I can use that picture and do the math to see how much it's wobbling:
https://www.timeanddate.com/astronomy/planets/distance says Saturn is 18.96" right now. That's a second of arc, 1/60 of a minute of arc, which is 1/60 of a degree. That means it wobbles 2 saturns * 18.96 arcseconds/saturn * 1/60 * 1/60 * 2π/360 radians/arcsecond = .0001838 radians. My telescope is about 1.75 feet long from the center point, so since sin θ = o/h, the tip of the telescope is moving side-to-side a distance of h * sin θ ≈ 1.5ft * .00009192 = 0.08403 mm in that picture. Wow, that's about one printed layer line.How do I stop that?
Right now my telescope mount looks like this. It has a C-shaped top, so the telescope can rotate in and out.
It’s not a full truss - I can’t put a bar between the two tips of the C because that’s where the telescope goes. As a result, the tips of the C are only supported at one side, so they can move in and outwards. Experimentally, if I put pressure on the top part I can make the top part shift slightly in the xy plane.
I tried designing a tiny truss add-on to the front to help resist sideways force for mount v2:
I tried remaking it for mount v3! This time, here’s what mount v3 looks like. The rectangle in the center marks the telescope Bonk Zone, where I can’t put anything without hitting the telescope.
I printed it out, put it together, and noticed it was a very tight fit. Looks like I forgot to add tolerance to the hole sizes. I tried forcing it in anyways to see if it would work, and…
oh well. let’s see if it works once I reprint with bigger holes.