Epson es1000c locks up when on big scans

[mjalkut]

I just purchased SE for Mac for the Epson ES1000C after trying the demo and confirming that it seemed to work on a simple small scan.

I am using Mac OS 9.2 and/or 10.2.4 with and w/o photoshop 7, on g4 400 sawtooth AGP, with 1G RAM, and 100G disk, with ES1000C connected via Adaptec 2930U SCSI.

If I try to scan a scan bigger than 6M it locks up after about 2% of the scan. I have to quit the scan and reset the scanner. Smaller scans work fine. It fails the same on OS 9 or 10, with or without PhotoSHop. It failed with SE v6.0.2r10 and 6.0.2.r15.

Please help.

[LSI_Kratzenstein]

The Adaptec 2930 U is a good, but fast SCSI card, that could cause timing problems with SCSI scanners. It sounds alittle bit like this problem. Could you start a scan with less width and much height and a size of over 6 MB ? It could be, that there is a commicationbroke (Terminator missing, Timing Problems) with high dataspeed.

[mjalkut]

yes, when I reduce the width I can increase the dpi and get a bigger scan. When I reduce the width down to 1 or 2 inches, it will scan huge scans even up to 50 megabytes. But if I only reduce the width to 6 inches, I can finally scan a 6 megabyte scan but not much bigger.

Is there a way to fix this?

This has never affected the use of Epson TWAIN on os9, and doesn't seem to affect Hamrick's v**s**n on OSX.

I have tried all manner of SCSI chain termination experiments to see if anything would change the results. I got the same results every time. Is there any way to set the 2930U to adjust it? Or is there a way you can modify Silverfast?

Thanks for your help.

[LSI_Kratzenstein]

I talked to developer, and he gave me the information, that this error is known and fixed (internal) and will be in the upcoming update of SilverFast (Release 21).