On Monday 26 July 2010 15:58:10 Stefan Champailler wrote: > > > Maybe Gerhard knows something about this. In the end, it may just > > > vibrations due to different motor settings between SANE and the Windows > > > driver. > > > > your guess is right. While playing with different settings, the grinding > > noise was my partner - and as you now observe sometimes this ghost comes > > back :( > > To solve this problem you might try to play with the settings in > > plustek-usbdevs.c line 2044/2045. Try to reduce the dMaxMotorSpeed and > > dMaxMoveSpeed until the noise dissapears. It's been a long time since I > > tweaked these settings, so I can't tell you wich one to tweak. But always > > change only one setting at a time. > > Cool, I'll look at it... However, before I start playing, could you tell me > what kind of increment I may try ? According to this : > > 0.86, /* dMaxMotorSpeed */ > 0.243, /* dMaxMoveSpeed */ > > I think a safe guess is to have increments of 0.02 for the max motor speed > and 0.05 for the move speed, but that's complete guess. Do you remember the > kind of increments I may use ? By any chance do you also remember the units > of > those values, what they represent physically ? I ask because I don't know if > there's a risk of breaking the hardware with bad values... (I once broke a > CRT > monitor by programming a bad refresh speed :-()
well there where indeed some problems on the EPSON 1260, where I blow a fuse with the wrong settings, but I never had problems with Canon devices. 0.05 should be okay. Regarding the units, I'm not sure could be inches per second... you might check the formulas in doc/plustek/Plustek-USB.txt but in the code there are several corner cases and in the end the trial-and-error approach will be the fastest here ;) Keep me posted and good luck Gerhard > > Anyway, thanks for answering so fast. I'm on holidays right now so I may have > some spare energy/time to dig into this. > > stF > > > -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
