On 16-02-12 21:24, Stef wrote: > >> But even if it is in the starting position, almost every scan resolution >> I use moves the scan head to the wrong starting position, always too far >> resulting in a dangerous overscan (it doesn't bump however). > The geometry description of the 4850 is a clone of the G4050. I has > never > been tuned since I don't have this device to test on. The value to work on are > the one in genesys_devices.c in the hp4850 device entry: > > SANE_FIX (8.0), /* Start of scan area in mm (x) */ > SANE_FIX (13.00), /* Start of scan area in mm (y) */ > SANE_FIX (217.9), /* Size of scan area in mm (x) 5148 pixels at > 600 > dpi*/ > SANE_FIX (315.0), /* Size of scan area in mm (y) */ > > The first is the amount of distance for the head to reach scan area. Decrease > it until scan really starts at he beginning of the scan area. > > The second is left margin, and third the width. Tune width when margin is OK. > > Last field is total scanarea height. Decrease it to 250 so you get sure the > head won't bump to the end of device. Once other values are settled, increase > it until you get the whole area scanned. I found the following values
SANE_FIX (7.9), /* Start of scan area in mm (x) */ SANE_FIX (5.9), /* Start of scan area in mm (y) */ SANE_FIX (219.6), /* Size of scan area in mm (x) */ SANE_FIX (314.5), /* Size of scan area in mm (y) */ -- Groeten, Dani?l Sonck ------------------------- WWW: http://dss.nl.eu.org/ TEL: +31683554997 ------------------------- Zin in wat kunst: http://dsonck92.deviantart.com/ ------------------------- Certificate provider CA : CAcert ROOT: http://www.cacert.org/index.php?id=3 -------------- next part -------------- A non-text attachment was scrubbed... Name: dsonck92.vcf Type: text/x-vcard Size: 208 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20120221/cf946b26/attachment.vcf> -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 2312 bytes Desc: S/MIME Cryptographic Signature URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20120221/cf946b26/attachment.bin>