Makelog

Primary Mirror Linear Bearings

There has been progress with the second round of focuser prints, but I’m going to take a moment to sidetrack to the primary mirror linear bearings. This is for adjustment of primary mirrors to make sure the images merge into one stereo picture rather than two side-by-side. Up to this point, I’ve been planning to…

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Custom 1.25″ Parfocal Ring Prototype

It’s hard to wait for 3d prints in the mail, so in the meantime, I designed two different parfocal rings. The first is a fixed-height ring that uses grub screws the same as the existing products on the market. 3d printing these is still cheaper than purchasing retail. The second is a little more radical:…

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Focuser Modifications

I was able to brute force the screws through the too-small holes in the drive plate, so the focuser came together for testing. Looks like we’ll call this one v0.1 as 0.5 was a little optimistic: So far, it only works with a gravity assist, which I believe means the drive plate in standard Onyx…

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Almost Forgot – 1.25″ Eyepiece Adapter

Ok, this isn’t strictly a case of “forgetting” to design somethign–I’d planned to just buy 2″ to 1.25″ eyepiece adapters ready-made. But since I’m becoming more comfortable with rolling my own parts, I thought let’s design it and see how much it costs to print. Turns out these will cost less than $8 to print.…

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Focuser Updates

Updates have been made to the focuser based on the 3d prints. One unexpected change is the possibility of doing away with the bearing axles entirely. I placed the bearings in their slots on the drive block print, and even with tight tolerances they spin very freely when placed directly against the Onyx surface. I…

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First Focuser Prints

So! The first parts arrived. As someone who’s been doing graphic design for over 20 years, receiving my first 3d-printed parts completely recaptured the excitement of seeing my first 2d work coming off the press. Real things are real, which is why you get excited when you experience the original photons from Jupiter hitting your…

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Filter Cartridge Progress

While waiting for focuser pieces in the mail, I’m working on the filter cartridges: A few new features. First, chamfers around the edges. Second, finger holes at the top to help with screwing/unscrewing filters. Third, pattern on the triangular corner to help with grip and distinguish cartridges (and therefore filters) in the dark. Cartridges will…

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Focuser Hardware Arrived

So the focuser hardware delivery beat the printed parts due to printer problems. Good news is, the screws fit the inserts. The grub screws are tiny! I need to order an 0.9mm wrench for them. Interesting notes on part origins: Bearing shafts: USA Bearings: Japan Grub screws: Taiwan Heat Inserts: USA or Japan or Taiwan…

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Filter Cartridge Adjustments

The focuser has been moved up to accommodate the filter cartridges (seen here in gray). They have been increased in height to 13.5 mm, a little over half an inch. The filter will sit entirely within the cartridge. This means cartridges with inserted filters can be kept safely in a foam-filled accessory case without any…

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