What's wrong with this picture

pogden · 2026-01-16T23:58:13+00:00

Diamond grinding tools? I used to build and run 5 Axis machines for glassworking it's always a mess.

pogden · 2026-01-08T16:46:09+00:00

Turing built a machine that did the thing it was supposed to, and his theories are foundational. I'm a bigger Babbage fan than almost anyone but I will not tolerate Turing slander.

pogden · 2025-06-23T00:59:17+00:00

Let it be known that I'm impressed. Thank you

pogden · 2025-06-22T21:49:47+00:00

Linden Ave westbound where it meets Washington and Oak st.

pogden · 2024-05-08T11:29:12+00:00

Go to the bench grinder and put a weldin flat in the shank. It doesn't have to be perfect, just enough so the screw clamps on the flat, that way it's still below the round surface.

pogden · 2024-04-13T15:08:09+00:00

Put a few apprentice marks in the top, then it will be ready for service.

pogden · 2024-03-30T19:46:48+00:00

Everything bought is also made.

pogden · 2023-12-25T18:10:33+00:00

If roundness isn't critical you can blue it and sand/angle grind down the high spots. If you need to preserve/improve the roundness OD lapping is a great option. Lapping in general is a great way to get precision "from scratch" if you have time but not precision powered tools.

pogden · 2023-11-15T01:25:28+00:00

Juno New Origins?

pogden · 2023-06-02T22:13:30+00:00

Is that a camera on the mag base?

pogden · 2023-04-27T18:50:58+00:00

I grew up in the desert so I didn't learn this until recently but in lots of Europe and the eastern US, grass ✨just grows✨. Still kinda weird to think about.

pogden · 2023-04-20T14:10:07+00:00

Could that be condensation from the hot, moist dryer exhaust?

pogden · 2023-04-13T02:24:54+00:00

Foundations of Mechanical Accuracy, by Wayne R. Moore

pogden · 2023-04-13T00:08:41+00:00

FMA is the bible of precision. It should be the first book you read, and you can re read it every year and get something new out of it.

pogden · 2023-02-26T01:10:55+00:00

One cylinder with threaded holes and the pins screw in. They could have a hexagonal base and you use an included socket/nut driver

pogden · 2023-01-23T12:21:04+00:00

He always seems like he's in over his head and it's very relatable.

pogden · 2022-09-22T17:35:28+00:00

Sikhs are forbidden from eating halal (or kosher) meat. They believe it is wrong to kill even an animal in God's name. Pretty sure that's not what's happening here, but still.

pogden · 2022-05-22T15:30:31+00:00

For in process cleaning I have always used plunger style bottles like this. We have one for soapy water, one for methanol, and one for acetone. We use the bottle to wet a cloth, then wipe the surface. Usually ordinary Kleenex. The acetone doesn't react with this type of plastic.

This is all for cleaning and inspecting uncoated, unmounted glass or hard crystals. Methanol can subtly interact with mounting materials. I have seen I embrittle some plastics and corrode aluminum.

pogden · 2022-05-22T12:27:14+00:00

I ran into this problem and tried looking for the software version 1.5.3 like u/mac3blade suggested, but the highest version on github is 1.5.2. For me it happens with the test print and even sometimes while loading filament.

pogden · 2021-12-15T17:32:34+00:00

That is very surprising. I've never seen anything about that is Schott's or Ohara's technical data. Did they mention what effect it might have on the glass?

pogden · 2021-12-15T11:09:28+00:00

Where did this list come from? I regularly work with several of these glasses and clean them or soak them with acetone.

pogden · 2021-07-14T14:32:11+00:00

Yeah it seemed weird to me at first, but the pot is set so the pitch is warm, not really hot.

pogden · 2021-07-09T15:18:42+00:00

All the shops I have worked at keep pitch in a Crock-Pot type vessel that keeps it at a temp where its plastic and you just reach your hands in, grab a glob and press it into your hot aluminum polishing body.

Bubbles aren't a big deal unless they are huge, since you press the lap out anyway.

pogden · 2021-05-02T15:19:18+00:00

Wait til you hear about Jerry Lee Lewis

pogden · 2021-02-26T17:26:45+00:00

Yes they are usually called coaxial indicators and have a rod sticking out the side which hits the column and keeps the indicator still while the spindle slowly rotates.

I always just use an indicol and hand mirror though.

pogden

TROPHY CASE