[sane-devel] How i can use 2 or more scanners at the same time??

kid2k4 at email.it kid2k4 at email.it
Wed Jul 23 21:42:24 UTC 2008

Thank, Very usefull! thank so much. Ops! quad-core is a problem...
I take you informed of developments.. bye

litlle girl ha scritto:
> Lov level scanner driver is required, gt68xx ie.
> > 1. the optical package of each scanner cannot be placed end-to-end and
> > get a complete scan, because there is some dead space for packaging or
> > mechanism on the ends. so now you have to stagger them, and then have
> > a staggered calibration strip. correcting skew and adjusting height
> > will be excercises in very precise machining.
> Scan heads packagins can ovelap themselves, there will be no dead 
> space, with constant y offset, it will be easy to produce image.
> ---------=====- (head1)
> -----=====----- (head2)
> -=====--------- (head3)
> > 3. you will have to have a much larger motor, or convince the series
> > of motors to move at EXACTLY the same rate, or some of them will be
> > dead weight (very difficult to do if they have independent
> > controllers)
> There is easy way:
> connect one controler to all motors
> (split signal)
> (each head will have own motor)
> in one cycle all scanning all heads go 1 step,
> then colect data from all scanning heads,
> then make next step....
> with dualcore or quadcore CPU collect all data
> will not be a problem,
> (conect heads to all usb ports avaible,
> not to one potr or hub)
> USB1.1 max transfer is 12 Mbit/s (1.5 MB/s)
> so i.e. 10 heads can make max transfer about 120Mbit (15MB/s)
> this is no problem download it and save to disk(s)
> Regs,
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