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Laser engraved into Beech.

379755

Jeff, nice work. Just out of curiosity you say that you reduced the job time by not scanning the background.
Did you have to Photochop the artwork (from Post #44) or did you software reduce the bit...

Rodney,

I think you are absolutely right. As far as CO2 lasers are concerned most substrates are treated as being 1bit.

I may be wrong (and I stand to be corrected) but I think the reason Jeff...

Jeff,

I still remember first seeing your work last summer and being totally amazed. My initial thoughts were that it could not be reproduced with a CO2 laser for many of the reasons that others...

Steve,

The wood I used was 3mm Obeche. (I think you are perhaps confusing my work with Jeff's). ;)

Paul.

Steve,

Do you consider an axis speed of 4500mm/min to be fast. ?
Surely, if I can CO2 engrave that image in 12 minutes you can do the same thing. ?

Perhaps I am misunderstanding the...

Steve,

Sorry to keep going round in circles but you made the statement 'I don't understand what it's doing that can't be done with a CO2 laser'.

Jeff posted an 8bit .jpg image earlier, I ran...

Steve,

I think you are quite correct - commercial CO2 laser machines operating software's have offered exactly this method of image reproduction for many years now - However, if you were prepared...

Steve,

Yes, true 8bit shades of grey engravings (without dithering) can be done with a CO2 laser (see post #79) but I doubt that many will actually try it. :)

Paul.

Hi Dave,

Please ignore my earlier post - I have just been told that you are using the FSE laser which converts the image to 1bit before dithering so my question has been answered. ;)

Paul.

Hi Dave,

It's difficult to tell from your photo but are you able to get 'shades of grey' or is it just the 'illusion of shades' as a result of the dot-dithering. ?

A closer photo of just one...

Jeff,

As said previously I doubt that the process is even possible with a CO2 laser because the 10.6um wavelength will also attack the rear surface of the glass causing micro-fractures which will...

Hi Rodney,

You may be right, as I said I have not actually tried the process, but if you take a close look at Jeff's mirror the 'shades' are there. IMO the process not only messes with the...

Perhaps the most remarkable thing Jeff has presented in this thread is that diode lasers can be used to reverse engrave ‘shades of grey’ into mirrors.
It may not be immediately obvious but whilst...

Naa, your new diode will arrive in the post tomorrow. ;)

Paul.

In between the engraving jobs I had a chance to try Jeff’s picture image which he posted earlier. It’s only a scrap piece of wood and the result is a bit on the dark side but it does, I think,...

Hi Guys,

From reading the comments in this thread it appears that some are perhaps seeing what they want to see rather than seeing or fully appreciating what is actually here.

Like many...

Just a thought, but that may just be a typo in the Leetro document.

I certainly would not want to pulse my tubes at a frequency in excess of 20kHz.

Paul.

Hi Vicki,

I am not sure exactly how you would go about doing this with any particular, proprietary, laser machine (our machines are home constructed).

Basically an 8 bit image comprises of...

Tried chicken eggs a while back.

The extraction system took care of the smell OK.

Paul.

This may be of interest to others...

A small group of us have been experimenting with different materials and software (GCode based) for reproducing 8 bit greyscale images.
These were recently...

Great find Ron, thanks for sharing.

Paul.

As far as I am aware Illustrator does not support HPGL.

The last remaining, main stream, support for HPGL is Corel.

Paul.

It appears that any material which produces carbon soot when burned / vaporized will work (with those producing the maximum amount of soot being the best).

A large percentage of this soot...

Hi John,

I used paper transfer tape (of the type used for placing vinyl signs).