15K "China Box"                    Back

The Ilda test pattern at 15Kpps, before and after adjustment.
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The progress...

10-04-2007. Look at the nice ILDA test pictures and see what happened when I tweaked the pots on the driver module. Now it makes the 15K at least. Should have done that from the beginning.

02-04-2007. I might have misunderstood something. On a German forum they talk about modified driver boards for these galvos, that makes them much faster (20-25K). And the ebay seller writes that there is “no feedback output” on it. After I did a little more research, I found out that this “feedback output” is an output signal for some kind of safety shutter that blanks the laser, in case there’s no movement on the galvo. So, I guess I was wrong assuming the optical feedback isn’t used. But still there are room for improvement – Maybe if I get a schematic one day.

28-03-2007. I found out that that the optical feedback system is NOT used in this kind of scanners. That makes me wonder if I could modify the driver board and and make it work. I mean, the galvos can do the job for shure. Why not the driver? It could be fun to see what difference it would make.