Comment 57 for bug 1184699

I've just been testing this and it seems that sane / driver doesn't check for the end of track correctly when returning the scanner element to the start of the track after a scan.

This means that the scanner element gets rammed into the start of the track and you can hear the motor screaming in pain as it tries to push against an immovable object.

If you listen you will hear a high pitched humming noise at this point as the scanner desperately tries to move the optical sensor (scanner element)

I presume this triggers some sort of fail safe / over current protection which kills the scanner motor and resets the scanner. Effectively causing the behaviour everyone is observing.

This has the potential to break the motor and scanner.

On windows with MP_Navigator EX4.0 (Canon's Software) this does not happen.