Solar Cricket, from MAKE magazine

It’s been a busy year so far – lots of stuff going on, and precious little time to build anything.

A couple of months ago however I was asked by my buddies at MAKE magazine to put together an interesting little project. A solar powered chirping cricket – that uses solar energy to maintain the charge on a 9v battery, and then starts “chirping” once night falls.

As well as using the solar panels to keep the 9v Lithium Ion battery charged, they are also used for the light detection routine. The project also features the excellent JeeLib library to manage the low power sleep routines.

More details here:

http://makezine.com/projects/solar-cricket/

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I’ve recently been talking with Greg Weber – the owner of a Trotec Speedy 300 laser machine. He offered to make a posting on the blog about some of the projects he’s been working on…

Hi, my name is Greg and I’m the owner of a Trotec Speedy 300 laser machine. I love to work on various materials in my spare time on this laser cutter/engraver. I prefer wood, glass or paper and would like to share my experience with these materials with you. I mainly realise my own ideas and designs but I’m also searching the web for templates as well. I occaisonally use the ready-made designs on my machine supplier’s website. In case you’re interested, go check out http://www.troteclaser.com/EN-US-US/LASER-SAMPLES/Pages/Samples-Overview.aspx

Laser engraving paper and cardboard

Paper and cardboard both can easily be processed with a laser machine to make intricate designs, beautiful patterns or decorate invitations. Compared to mechanical cutting a laser really pays off when working with paper and cardstock due to its high precision. Recently I made this paper application:

 

Does the paper burn while processing it with the laser?
Some of you might ask if the laser burns the paper during the cutting process. This can easily be avoided by using the correct settings on the laser machine. If you don’t know the optimal parameters I suggest asking your laser machine manufacturer for help.

Applications made from wood

According to the manufacturer almost every type of wood is suitable for laser cutting and engraving. From my experience I’d say that balsa and alder wood are the best. There are almost unlimited options what you can create from wood. I usually use wood to make gift articles, premium packaging or toys. Check out this Valentine’s Day gift I made:

 

What is important for processing wood?

Again the laser settings are the key to perfectly cut edges when working with wood. To find the perfect parameters you have to test them before you start with the “real” process. Therefore you should have enough wood available. If you have any problems regarding the laser parameters, I’d ask the laser machine manufacturer again.

Glass engraving

There are many possibilities regarding glass engraving. Even photos and graphics are possible. According to the manufacturer you can engrave any design on glass which can be printed.

How to engrave a drinking glass?

To engrave a wine or beer glass the glass is clamped into a rotary attachment. Make sure to set the appropriate diameter of the glass and the height of the graphic in your laser software. The software then calculates the design of your graphics for the conical surface of the glass. This is essential to get a perfect result. A CO2-laser is used when engraving glass.

 

I hope I was able to share some insight on working with a laser machine. Questions highly welcome :)

[I kinda like the glass engraving, that's something I'm going to have to try myself... - Steve]

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3 comments

…a Goatskin drum (Bodhrán)

March 4, 2013

Ever since I saw Mike Oldfield remix the Blue Peter theme back in the 80′s I was fascinated with the strange looking drum be played half way through… It was only recently that I found out it was called a ‘Bodhrán’ [Bo-rawn] (which I’m told might mean ‘deaf’ but that was probably a joke, or […]

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FAME! I wanna live forever (etc…)

December 14, 2012

I just got an email from Pierre-Alain (thanks!) alerting me to the fact that my picture was being used to sell a sound font of the laser harp. Fancy that – I contacted the seller, and reported the posting to Ebay, but there doesn’t seem to be a policy about using pictures of people to […]

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Finally cutting something out

December 6, 2012

Built the enclosure, and hooked up fume extraction and air assist… This is cutting 1/8″ plastic – everything seems to work just fine – 3 passes and the pieces just drop right out. The cutting residue washes off with soap and water. UPDATE : I was looking for tips on identifying laser safe plastics and […]

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…Thorn’s Guitar, from the Hex Girls

November 27, 2012

Who are the Hex Girls? Obviously you’re not a Scooby Doo fan… My daughter LOVES the Hex Girls, and for Halloween she wanted to be the lead singer. So I decided to build her a guitar closely modeled on the one used by Thorn (or Sally McKnight). We started with the Batman logo from the […]

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…a new CO2 Laser cutter / engraver.

November 26, 2012
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Wow, been a long time since I posted about anything. I thought it was about time I wrote about something new. I recently acquired all the parts for a laser cutter – although I was running an 80W tube from the BlackToe gantry I found that the two machining techniques were at odds with each […]

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…custom electronic workbench

June 26, 2012

I’d been using an old dining table as a workbench for a long time – and it just wasn’t working out. The cables for all the test equipment kept getting tangled up, and it was too deep to be an efficient use of space. 20 minutes in to any project and it was a mess… […]

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Did anyone else catch the Hellraiser reference in last weeks Scooby Doo?

June 18, 2012
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I was watching the latest episode of Scooby Doo Mystery Incorporated with my daughter last week and could not fail to spot this gratuitous reference to Clive Barker’s Hellraiser. (Something I never thought I’d see). What was really interesting was that this was a 20 second vignette that had nothing to do with the regular […]

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The Transit of Venus

June 5, 2012

OK so it looks a lot like a black dot on the face of the sun, but you don’t see it very often… Taken with a Nikon D2X, 300mm zoom lens and a solar filter.

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