Full Version: banding
From: Mike (SPACE_ENGRAVERS) [#7]
19 Feb 2007
To: Cody (BOBTNAILER) [#6] 19 Feb 2007
Cody,
Thanks, I'll try that...I was using 100 speed and 60 power...I'll slow it down a bit and see what happens.
Mike
From: Mike (SPACE_ENGRAVERS) [#8]
19 Feb 2007
To: Cody (BOBTNAILER) [#6] 19 Feb 2007
Cody,
I tried to slow it down and am having the same banding effects. I think I remember somone a while back talking about adjusting the tension on some belts...I'll try to look into that.
Mike
From: Boz (CHEDDARHEAD) [#9]
19 Feb 2007
To: ALL
From: Cody (BOBTNAILER) [#10]
19 Feb 2007
To: Mike (SPACE_ENGRAVERS) [#8] 19 Feb 2007
Mike,
Here's a goofy question: Is the banding appearing on your screen before you send it to the laser? My old scanner started putting bands in my scans, but they were hardly noticable....until they were engraved. It only took me once to figure that part out.
I was sure hoping that slowing your speed would help, as that's one of the easiest things to control.
Cody
From: Engraving Wiz (TEKAWIZ) [#11]
19 Feb 2007
To: Mike (SPACE_ENGRAVERS) [#7] 19 Feb 2007
Mike, Try reducing power not speed. Reducing power works for me.
Kurt
From: Harvey only (HARVEY-ONLY) [#12]
19 Feb 2007
To: Mike (SPACE_ENGRAVERS) [#8] 19 Feb 2007
If it is something like 1/2" darker, 1/2" lighter, 1/2" darker, etc., it is caused by bitmap misinterpretation.
The techniques you posted seem to be right. I assume when you went to 300 DPI resolution you did it by resampling. If you went there then resized it could be problematic.
Also Corel 9 likes the image to be a size that the pixels in the width are divisible by 4 evenly. There is also a bug in 9 that required you to remove 1 pixel of width from the image after all other adjustments, in order to not get a line vertically down the center. (Since the updated ULS driver a few years ago this has not caused me problems.)
From: Mike (SPACE_ENGRAVERS) [#13]
20 Feb 2007
To: ALL
Thanks to Brian at Epilog helping me narrow down my problem, I finally figured it out. When I was exporting my file to the 8-bit grayscale, the icc profile and anti-aliasing buttons were checked. I'm not sure which one of these fixed my problem, but it's good now! Anyone know what these do?
Mike
From: Stunt Engraver (DGL) [#14]
20 Feb 2007
To: Mike (SPACE_ENGRAVERS) [#13] 20 Feb 2007
ICC (International Color Consortium) profiles are used to calibrate colors for specific printer, ink and substrate combinations.