I have built one more shelf in my garage.

Lessons learned:

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Why?
Because Halloween is coming…
And because I had 3 scrap lights and some scrap plywood…

I have got a R-axis drive as a birthday gift.

It is just plug-and-play with GRBL controller.

And it is also adjustable

But…

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This is not Neje and not 80w. This is shady “40w” laser from Aliexpress.
Guess why did I polish off the corners like that?

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Spinner size is limited by hand size. You cannot make it more than 7 bearing large, or you would not be able to spin it. Or could you?
Well, I can spin my 15-bearings spinner:

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I have a fancy dual-bin automated electric trash can.
I almost like it (well, if it would also be Alexa-controlled… sounds like a new project idea…)
Anyways, it has 2 bins – for trash and for recycle.
And it has a fancy trash bag holder. Which has an interesting design but way too flimsy and does not stay in place.
So I decided to reinforce it.
Here is my design:

And here is the cutout:
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Hey, I made another wooden spoon!

Cool!

Wait a minute, why there is word “failure” in the name of this post?
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Laser engraving is pretty cool.
However, it has obstacles.
The biggest obstacle is engineering stubbornness.
Let’s take a look how getting mentally stuck inside the box holds us back.

Laser engraving with common GRBL controller is known to be sloooow.

Some folks claim that STM32 controllers are faster.
So I have got one of those and did a bench test.

Here is the board.

Spoiler: result was unexpected, but you can probably guess that by my bitterness in the introduction.

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Look at this:

Yes, my laser cutter went crazy and have burned the base plate.

Am I right blaming GRBL firmware? Well, it is not black and white

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I made a back light for a microscope based from some very cheap but powerful 12V LED panel!

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