good dithered image

[vincenttor]

Hi all,

I have seen so many nice engravings/cutouts so i started testing it myself.
just haven't found out the right setting and dithering.

i have a 40w co2 laser and just can't get it as nice as the pictures i have found on some websites so i was asking myself is it possible with my machine ?

these are on glass/mirrors




and this is on acrylic




if someone has done it on acrylic or glass can you maybe send me your image so i can see if it works on mine also

not real nice results till now

thnx

[zax15uk]

The 'trick' is matching image resolution with your machine settings, and also getting the correct power for the material.

What software are you using - PhotoGrav can produce good results without too much effort, but you can get the same effect with Photoshop, GIMP etc.

Zax.

[vincenttor]

ok thanks zax,
will give it a few more go's then
i found and done the steps like described on the FSE forum about image dithering and it gave a image but not as nice with the shadows like the images i posted.

using acrylics and glass most of the time will post some results im hoping to make

[Litografa]

Agree with zax15uk concerning PhotoGrave - not necessary invent bycicle or spent time with PS, buy Photograve and enjoy

[vincenttor]

i am using corel draw right now but will download the photograv demo to test
thanks

[bpoulin]

I have photoshop I just need to find a decent plug-in for it. I tried one but the image went from nice and detailed to big and blocky. Anyone here use a good photoshop plug-in? I saw one that advertises it's as good/or better than photograv. But they want just as much for it. If I'm going to pay that much I'd rather just buy photograv.

[bpoulin]

How do you know what your machine's resolution is?

[zax15uk]

It is the DPI or LPI used when you output files to the laser.

Zax.

[SkipW]

Originally Posted by bpoulin How do you know what your machine's resolution is?

In LaserCut software it's called Scan Gap and I think a setting of .086 equals 300 DPI if I remember correctly. When you choose Engrave you should see the Scan Gap input area. Not sure how it's set in Newly Draw.

[bpoulin]

Originally Posted by SkipW In LaserCut software it's called Scan Gap and I think a setting of .086 equals 300 DPI if I remember correctly. When you choose Engrave you should see the Scan Gap input area. Not sure how it's set in Newly Draw.

I do see the scan gap input area, and I played with it a little bit, But I have no idea what I'm doing lol. Is there a way to calculate what dpi=scan gap.

[notexpert]

Originally Posted by bpoulin I do see the scan gap input area, and I played with it a little bit, But I have no idea what I'm doing lol. Is there a way to calculate what dpi=scan gap.

bpoulin,

Here is the table of scan gap settings. For example from the table; 100dpi is 0,254 - 300dpi is 0,085 - etc...

Regards,
Hannu

[twehr]

Originally Posted by bpoulin I have photoshop I just need to find a decent plug-in for it. I tried one but the image went from nice and detailed to big and blocky. Anyone here use a good photoshop plug-in? I saw one that advertises it's as good/or better than photograv. But they want just as much for it. If I'm going to pay that much I'd rather just buy photograv.

I have used this with great success.

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