Monk Seals

Somehow I had gone fifteen years in Hawaii without seeing a monk seal in the wild. How I had managed this I will never know, perhaps just bad luck.

A pair of A Hawaiian monk seals (Monachus schauinslandi) slumber in the sand at Mahaiʻula beach
A pair of A Hawaiian monk seals (Monachus schauinslandi) slumber in the sand at Mahaiʻula beach

Been there, done that.

Not just one monk seal, but three. And a great view, watching as the seals played in the water then pulled up on the beach to rest for the day.

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Volcano Run

The usual plan… A 2am departure from the house, a 4am arrival at Hawaiʻi Volcanoes National Park, at the lava while it is still full dark, enjoy the show through the dawn, then go find breakfast.

Lava Fountain
A lava fountain at the western vent in Halemaumau, Oct 16, 2021

Exiting the vehicle after the long drive I was greeted by a serene silence and bright stars. Orion and the Pleiades were bright and directly overhead. I had to pause and just breathe in the damp forest smells, gazing upwards to the heavens.

There were another half dozen vehicles in the large parking lot at Devastation Trail. I was not going to be alone at the viewpoint, but it was not going to be crowded either. Reports online have mentioned large crowds in the evening, with even the Park Service recommending a morning visit.

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Magnitude 6.2

Well? That was the strongest shake we have had in a while. Magnitude 6.2 well offshore of the south end of the island.

The whole house rattled for a while, then a few sharp bangs, then it rumbled on for a while longer. Nothing knocked off shelves, just a steady rattle of plates and photos on the wall. The 3D printer took no notice, happily plotting along.

The cats did take notice, Electra disappearing under the bed, not to re-appear for a while. Ras was all perky-eared and vigilant.

For this quake I guessed not only the distance correctly, but the magnitude to within 0.3, (guessed 6.5, USGS revised 6.2). We have plenty of experience with big island shakes at this point. I felt both the S and P waves arrive, that gave me distance. What surprised me is the depth, 21 miles down, that is below the crust, into the mantle.

Magnitude 6.1 Down South
USGS plot of a magnitude 6.1 earthquake off the south end of the island with aftershocks, Oct. 10, 2021

Industrial Design

Continuing in my 3D printing bender I have been finishing up a few projects that have been on hold due to missing bits. A few other prints have been done to improve the printer itself. While along the way there have been a couple things designed and printed just for fun.

Minimalist 3D Printed Lamp

I needed a lamp to keep the 3D printer bed illuminated without leaving all of the garage lights on. This light would allowed me to keep an eye on long prints using one of the little Wyze security cameras.

A bright LED supplied by the 24V power supply of the printer would be just the thing.

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A 3D Printed Finder ‘Scope

I wanted a smaller, lighter finder ‘scope for the Astrola, and I wanted right angle to stop straining my neck!

3D model of the 40mm finder ready for printing
3D model of the 40mm finder designed in OpenSCAD

I have been using a big Orion 9x60mm finder on the Astrola, the only telescopic finder ‘scope I have among the Telrads. It is nice, with a bright image that shows many faint fuzzies. It is also huge, and very heavy, it is also straight through, requiring one to crane your neck around to view through it on the Newtonian ‘scope.

A small, lightweight finder was in order, a perfect project for a newly arrived 3D printer.

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Ender 6 Hot End Cable Clamp

The Creality Ender 6 is an impressive 3D printer, particularly for the price. It does exhibit some obvious design issues however. One of these is the hot end cable clamp, it is just not sized well. This critical cable harness flexes constantly as the hot end moves back and forth.

The Ender 6 hot end cable clamp as supplied
The Ender 6 hot end cable clamp as supplied

The supplied clamp is one of the few 3D printed parts on the Ender 6. As you can see from the photo the clamp is simply not large enough to properly secure the cable loom. This is odd, as it would have been so simple to design and print a properly designed part.

Can you leave the clamp like this? Some hackers do, I have seen several YouTube videos of well used Ender 6’s with the original cable clamp and loose wiring. It does work, I printed my first prints with the clamp like this. However, if left alone it is likely that the wires would be stressed over time leading to premature failure of the cabling and requiring an annoying repair effort.

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Additive Manufacturing

For much of the past couple decades I have worked at employers who had machine shops. I was regularly in those shops making parts for work, or on occasion after hours for myself. All of the little parts I need for the many projects that appear here on Darker View.

Building an Ender 6 3D printer
Building an Ender 6 3D printer

My current employer does not have a machine shop leaving me no way to make parts for telescopes, electronics projects, or even little repairs around the house. Neither do I have space for a machine shop in the house. Fortunately another, more recent solution is inexpensive and quite capable, additive manufacturing.

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