Thanks a lot for the information Ralph! That's very helpful and it's good to know that different backends have varying degrees of control over the scanner at hand. :)
- Joel On Sat, Dec 2, 2023 at 11:58 AM Ralph Little <[email protected]> wrote: > Hi, > > On 2023-12-01 11:56, Joel Penner wrote: > > Hello, > > > > I was wondering whether it's possible with SANE to control how quickly > > the scanner imaging head is returned to the starting position. Maybe > > it's a long shot as this is probably controlled through firmware, but > > just checking. Ideally I would like the ability to control the > > retraction speed of the Canon CanoScan 9000f or 8800f scanners or the > > Epson V550 scanner. I am trying to slow this down to make the scanner > > operation quieter. > > > > > I'm pretty sure that the Canons cannot be easily modified in this way, > at least I'm not aware of anything in the pixma protocols that allow the > return speed of the print head. The bjnp and mfnp protocols are pretty > high level and the smarts for controlling the scan head are in the > firmware of the device. > > As for the V550, it *might* be possible. I don't know much about this > device nor its protocols. > > TBH, to get direct control, you would need something with a more > hardware-oriented interface, perhaps a Genesys-based device where the > backend is manipulating the motor slope and speed tables. With one of > them you would have a chance. > > Cheers, > Ralph >
