I never thought of using a bitmap image. I do work in PS. Are you calling PPI the same as DPI? just wondering.
Thanks Doug
What speed and power would you use John? I have a LU1-4 20 watt.
Doug
PPI, LPI and DPI are functionally interchangeable unless you get into specialised equipment.
PPI (points per inch) is used for machines that generate single points that are not necessarily aligned in a grid. For example the printing used in print where you have points of different sizes (newspaper, comics).
LPI (lines per inch) is used for machines that have discrete steps in one direction (usually rows) but are either analog in the other direction or very hires. For example CRT televisions and laser engravers (where the density of lines a picture is engraved with is given in LPI but each line has a completely independent and maybe even higher resolution that’s determined by the speed the laser (or electron tube) can be switched on and off).
DPI is used when dots are arranged in a fixed grid, like on a computer monitor.
PPI (pixels per inch) as a synonym for DPI. And DPI is sometimes used to mean PPI. Some issue with different industries having different existing terminologies when going digital…
Thank you for the answer. I thought that was what it meant.
Doug
1 Like
Okay,
Here is what I got. Still not sure what I am doing wrong. John I followed your steps. Maybe I got something wrong with what you said. Not sure.
Doug
1 Like
Have you tried this?
1 Like
I will give that a try. My speed is 1700 and power is 70. Good or not?
Doug
I can’t speak to that as I don’t do photos yet. But to me it looks like you need some more DPI.
Okay,
I guess I finally got very close to what I want. The only ting is the lines on the inside around the edge. Other than that I like it. Tell me what you think.
Doug
2 Likes
Personally? I like what you did here but if you added more DPI and had slightly better edges it’d be perfect, Just my opinion.
1 Like
I saw a hack on YouTube that said try using baking soda and water. Coat the area let dry then do the burn
Brent,
Thanks for the reply. I have tried that and it was to dark for what I needed. It works great tho.
Doug
1 Like
personally I think you nailed in the first pic you posted above when you nailed it. I think it is three pics up. The last two are dirty background…possibly need to up DPI…just depends but the background is funky to me. I like your first success. Personally I take that on plywood all day long…its wood…its not like it is my Red River Polar Matte photo paper…
“The enemy of good…is better…”
Scott,
Unfortunately I lost the settings on that first photo. Also that burn was done in LaserGRBL. I think I saved the GRBL file but if I did I can not get it into LightBurn, at least I have found no way of importing it.
Doug
Baking Soad is the bomb for darker burns.
1 Like
Jody,
Thanks for the reply. I have tried that and it gives me to much of a dark burn and to much soot. Maybe I just can’t get all my settings to work together. My contrast and brightness settings have been up and down the scale and the gamma enhancement gave to much of a blurry edge.
I’m just about to give up and lose the customer. This is the first time that I have tried doing a photo on wood and it has driven me crazy. I have already spent almost the amount on test boards than what the job will get me. I guess I’m to OCD when it comes to my engravings.
Anyway thanks all for the help. It has been a journey. I’m doing one last burn at the moment just to see if this one will be okay. Any help on speed and power will help also. Run dither, grayscale, jarvis or what. I’ve tried them all.
Doug
1 Like
I happened to find an old test I did with the Baking Soda solution, I think with the right mixing ratio interesting effects can be achieved.
1 Like
Big difference. I have tried baking soda and it was just to dark for me and there was a lot of soot in the engrave and messed up the wood when I went to clean it.
Thanks for the idea and reply,
Doug
Well all,
I finally got it done. A lot of headaches and all that stuff. Tell me what you think.
Doug
3 Likes
I think the picture has become quite nice, congratulations. With your text on the wooden plate, I am “not so happy”. Besides the fact that you have used a fair amount of power, I will also have made the actual text layout a little different, but that is of course a matter of taste. You have asked for our opinion and that is also only my subjective view. If you are interested in how I want to have made the text itself, then you can just upload your file here and I will come up with my suggestion.