Speed is somewhat slower in ADF. Yes, if you put your book on the scanner glass, it takes more or less 4 seconds to scan the page.
Wolfram Heider On Tue, 05 Feb 2008 16:02:34 +0100, Alex Bernier <alex.bernier at free.fr> wrote: > Hello, > > Thank you for your answer. > > Is the speed needed to scan an A4 page with the ADF equal to the speed > needed to scan an A4 page without the ADF ? > (I ask this because on the Epson website speeds are given using ADF and I > suspect the GT2500 to be very fast with ADF but slower without...). > If I put my book on the scanner glass, it would take 4 seconds to scan > the > page, right ? > > Best regards, > > Alex Bernier > > > On Tue, Feb 05, 2008 at 03:52:02PM +0100, Wolfram Heider wrote: >> Alex, >> >> I have a GT-2500 here on my desk. It's a pretty solid office machine >> working reliably with the iscan and the xsane frontend. However, speed >> is >> slow with the default settings so one has to make sure that the speed >> button is activated. >> Some features like the ADF-duplex scanning aren't working with the >> graphical frontends but just from the commandline (scanadf). >> >> As to the scanning speed: 27 PPM seems to me to be the usual >> advertisement >> ballyhoo, anyway the GT-2500 makes in b/w scanning with 300 dpi a page >> in >> roughly 4 seconds giving 15 PPM. >> >> However the GT-2500 comes with an ADF-unit, and if you don't need it you >> would have to pay for something useless. Although the GT-2500 is quite >> inexpensive compared to other machines of its class and quality its >> price >> is clearly beyond the normal customer's budget (and the ADF-unit makes >> pretty a portion of it). So you may look for a pure flatbed scanner, >> Epson >> scanners are in any case a good choice if speed is the criterion. >> >> Best regards >> Wolfram Heider >> >> >> On Tue, 05 Feb 2008 13:54:43 +0100, Alex Bernier <alex.bernier at free.fr> >> wrote: >> >>> Hello, >>> >>> I don't know if it is the right place for this question... >>> I'm blind and I want a very fast scanner supported by SANE, mainly to >>> scan >>> books (it should be very fast for 300-DPI black and white scanning). >>> It's not easy to find information about performances of scanners. On >>> the >>> Epson >>> website, I found the GT2500 which can scan 27 PPM using an ADF. But I >>> don't >>> want to use the ADF... Because I want to scan books, it's more useful >>> for >>> me to know how fast the scanner is when using the "flatbed" mode. If >>> someone >>> has an Epson GT2500, I would really apreciate if he/she can give me >>> some >>> information about the scanning speed. >>> Or if someone knows about an other very fast scanner, suggestions >>> would be >>> apreciated. >>> >>> For the moment, I own an Epson Perfection 1640SU. It scans a page in 17 >>> seconds, but it is old and I think there is better models now... >>> >>> Regards, >>> >>> Alex Bernier >>> >>> >> >> >> >
