Nigel Gilbert
09-10-2012, 9:45 AM
Hiya all,
I am try to engrave some photo images onto slate, but the engraving has no real detail with largeish areas of solid engraving. The image on-screen clearly has a lot more contrast and detail than the finished results. I am using a Trotec Speedy 500. I am using Corel Draw via Job Control. I prep my images in Corel by resampleing the image to the correct size 80mm x 80m and setting the resolution to 500dpi - the same as the laser engrave dpi. I first change the image to greyscale and then play with the contrast highligh, shadows and mid tones to get a nice contrasty image. I then turn this into a bitmap with the jarvis algorithm. My laser power is 6% and speed is 20%. I have checked for slate engraving in the forum archives but I haven't seen this issue.
Thanks in advance ^_^
Nige.
I am try to engrave some photo images onto slate, but the engraving has no real detail with largeish areas of solid engraving. The image on-screen clearly has a lot more contrast and detail than the finished results. I am using a Trotec Speedy 500. I am using Corel Draw via Job Control. I prep my images in Corel by resampleing the image to the correct size 80mm x 80m and setting the resolution to 500dpi - the same as the laser engrave dpi. I first change the image to greyscale and then play with the contrast highligh, shadows and mid tones to get a nice contrasty image. I then turn this into a bitmap with the jarvis algorithm. My laser power is 6% and speed is 20%. I have checked for slate engraving in the forum archives but I haven't seen this issue.
Thanks in advance ^_^
Nige.