David, Thank you. See below David Miller wrote: > On Mar 19, 2008, at 11:14 AM, Tim Mimpriss wrote: >> I have had some trouble with Spyder3Print on a new Mac Mini running >> Leopard. The OS could see the sensor, but not S3P. Support Europe >> suggested installing the latest version, but I already have 3.0.1 as >> indicated in my support ticket, and I can find nothing laterer. >> >> > It couldn't have been a software problem; maybe just a USB or power- > over-USB > problem. What USB port do you have it connected to? Tried both port on computer and powered hub. >> Today it works! I measured a chart I had printed earlier only to find >> that the profiled image had unpleasant crossovers in the grayscale >> whereas the unprofiled image was fairly good on colour, but the >> grayscale ramp was off: a really big jump between 90K and 100K. >> >> > Sounds like bad measurements or other mistakes in the process to me. > > Have a look at the first video in this set and see if that helps: > > http://spyder.datacolor.com/learn_videos.php Have done so. the most useful learning point is to use Measured rather than Split on the measurement screen. >> I then wondered whether the spectro could be faulty. After cleaning >> the >> white pad and re-calibrating, I made some measurements off a Macbeth >> ColorChecker. Here are some results: >> >> Lab a b >> White 0.06 3.16 >> Red 59 29 >> Green -39 32 >> Blue 15 -51 >> >> All of these readings seem to be somewhat off target, but the blue >> especially so. Do I have a faulty spectro, or is there something I >> have >> missed? >> >> > > If you can email your measurement files to me at davem@..., > I can take a look at them and see what the problem is. Use the File:Open > Data command to open the folder containing the measurement files. Will do. > > Best regards, > > > David Miller > Senior Software Developer, Digital Color Solutions > Datacolor > >
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Re: [colorvision_group] ?faulty spectro
2008-03-20 by Tim Mimpriss
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