Useful Sites: Cyclone and Dust Collection Research, courtesy of Bill Pentz

The site: Cyclone and Dust Collection Research. The home page says it was created in 2000 and was last updated in August 2022. That’s an impressive amount of dedication.

I found this through a link from The Wood Database.

Yes, he is advocating for products that he helped design. I’m fine with that, profit is part of what makes the world go round.

Obviously, it’s about dust collection. I’ve only just started reading through the site, but I already found this bit of interesting information: it’s dangerous for a person to vent their dust collection system inside their shop. Very fine dust is what causes a lot of the physical damage and venting a dust collector system inside the shop lets particles too fine for dust filter continue to circulate in the shop. Much better is venting the dust collection system outside.

Mr. Pentz’s biography is quite interesting. At the end he says that his health has finally required him to retire and slow down. I hope his health gets better.

Mindset Monday: Practice Makes Perfect, or At Least Better. Part 2 of 2.

This is a follow-up of last week’s post.

Here are some of the places I’ve seen recommendations to intentionally copy other people’s work to better my own practice:

  • A book on the modern atelier movement, where the author wrote a significant part of a four-year curriculum was devoted to drawings that are copies of works of the old masters. This helped the artist learn how previous artists had solved problems in their paintings.
  • A book on handwriting, which mentioned copy books. Those were books where people would write down famous quotes, their favorite quotes, and other quotes, and carry it with them. It helped them with handwriting practice. It also helped them to always have a handy reference of what had been written before.
  • If I look online, I can find several arrangements and analyses of famous classical music pieces, most of them centuries old.

In each case, the recommendation is to get better by copying particularly skillful examples of what came before.

I’ve even read comments that art has to be grounded in what came before, or it runs the risk of having no reference or meaning to the viewer today.

If I’m buying something I want to use, and I want it to make my life easier, ease of use and ease of learning how to use it matter. And for that, the designer probably needs to have spent some time analyzing and copying already existing works.

Technician Tuesday: Some last flashlight links, and then I’m done with this topic for a while.

While I was looking up flashlights and flashlight standards earlier (here and here), I found a couple of sites which have more information about flashlights and ratings.

Both seem to focus on the 2009 version of the flashlight standard. I found both to be interesting. The first is Flashlight Wiki.

And there is also LED Resource.

I have a relative who swears the new LED flashlights which use sets of AAA batteries last for a shorter amount of time than older flashlights with incandescent bulbs and C or D batteries. I haven’t done any testing on that. And I don’t know of anyone else who has done testing on this. If I find someone who did, I’ll post about it.

Technician Tuesday: About that flashlight standard.

A couple of weeks ago I wrote about flashlight specifications. At the end of that post, I mentioned there was a standard for flashlights.

I was curious. I went looking for a standard described as ANSI NEMA FL 1. ANSI is the American National Standards Institute. NEMA is the National Electrical Manufacturers Association. I assume FL 1 means it was flashlight standard number one.

Searching for “flashlight” on NEMA’s site brought up the result “Flashlight Basic Performance Standard.” That link takes me to a page which says ANSI/NEMA FL 1-2009 (ID: 100237) has been rescinded and is now held and maintained by the Portable Light Trade Organization (PLATO) and is no longer for sale on the NEMA site.

(PLATO is a catchy acronym, but I’m not sure where the A comes from. There’s no “a” between the L of Light and the T of Trade.)

Now I go to PLATO’s website. This standard appears to be the only standard they issue and it’s now called the revised ANSI/PLATO FL 1 2019 standard. Their first edition of ANSI/PLATO FL 1 was released in October 2016, with a revised edition issued in 2019.

And it costs $500.

The website says it is provided free to PLATO members. The cheapest membership on their member dues page is $1,000.

I don’t know what is in that standard that it costs $500 per copy, but I hope it’s something pretty impressive. No, I am not going to buy a copy to satisfy my curiosity.

PLATO’s site includes a list of seven icons (after I scrolled down the page a bit) included in the standard for use with flashlights, and an explanation of each icon. I did find that to be useful.

Monday Mindset: Help and hindrance, standards

At one time I read product standards as a full-time job. I left that job years ago but I still look at what standards a product says they comply with, or are expected to comply with.

Simplistic description of standards.

Many standards do serve a useful purpose: they set expectations for a product. Depending on the standard and who issued the standard, those expectations might cover safety, features, performance, reliability, or other things.

Some standards are free, some cost a bit to purchase, some cost hundreds of dollars to purchase. Some are fairly straightforward to read, some are very dense. The trickiest seem straightforward when reading them, except there are certain terms which have a specific meaning in the industry or market covered by that standard, and that meaning isn’t well known to people outside that industry or market.

Standards can become a hindrance when the market expects or insists a product has to meet a certain standard. A person might have a good product idea but find themselves in an industry or market where the required standard is very expensive to buy or very expensive to comply with.

Standards are by definition reactive and a reflection of the past. Standards describe what has already been made and how it should be made going forward. I don’t know of any standard which was written about an imaginary product, in the hopes someone would read the standard and create a product to meet that expectation.

Standards are a really good way to show the limitations of language in describing the world.

Standards are initially written with an ideal something-or-other in mind. As time goes by, there are revisions which are almost organic in growth. These revisions usually come from someone trying something which didn’t work, or didn’t work as expected.

If a standard is written very precisely and explicitly, it’s easy for someone to avoid if they want to: find a way to describe their product which is different than that precise definition. Then the standard doesn’t apply. And if the definition is written more broadly, then someone who wants to avoid it can argue about the meaning of the words or the intent of the writers. And the standard still might not apply.

Any product or facility which was built or designed more than five years ago, and is being held to a standard whose initial edition was written more than five years ago, will have at least one place where the language or practices have shifted and it’s possible someone could claim the standard possibly wasn’t being met.

The best way to I found to learn a standard is to write a summary of each clause. That’s also very painful and arduous.

Why am I talking about all of this?

I don’t get to turn my brain off because somewhere a product standard got mentioned. I don’t get to turn my brain off because a product says they comply with a certain standard. And I don’t get to turn my brain off because a product doesn’t say it complies with a certain standard.

Standards can be helpful. Like any other tool, they can also be a hindrance.

Technician Tuesday: Some of the measurements for light

The human eye has a huge dynamic range for the amount of light our eyes can use. We can read in bright sunlight and most of us can read by candlelight. Yet the difference in the amount of light from those two source is almost ludicrous.

Trying to decide what light source to use by looking at specifications, instead of repeatedly buying-and-trying, is also almost ludicrous. There are multiple measurements used. The measurements don’t always measure the same things.

The best description I’ve seen recently is in the article “Lumens, Candela, & Lux” by Richard Nance, in the January 2023 issue of Guns & Ammo magazine.

(No, I still have not looked up how I should be citing my sources.)

For the terms lumens, candela, and lux,

  • lumens is how much light comes from a source,
  • candela is the intensity of the light in a chosen direction, and
  • lux is the amount of light on a surface when it’s a specific distance from the light source.

If I’m buying a light for my desk or nightstand, I’ll probably start looking for a lux specification. For portable lights like flashlights or worklights, I’ll look at both lumens and candela to see how much light there (theoretically) is and how focused that light should be. A small focused beam of light is great when I want to see tiny detail. A wider beam is better if I want a more panoramic view, such as if the power goes out and I want to see the entire room well enough to not run into the nearest table.

Light temperature is an entirely different topic.

And then . . . ugh. The article mentioned there was a flashlight standard, ANSI NEMA FL 1. I thought that would interesting to look at. And it was interesting, in a way that’s mildly frustrating and not at all what I expected. I’ll make that a part 2. There might be a part 3 where I post some good links I found about the flashlight standard which don’t cost at least five hundred dollars to view.