Okay so here i am, not knowing what to do 
The installation for my printer worked fine, but i cannot seem to get the scanner working.
i did everything it said on the brother website, downloaded the scanner driver and installed it, and edited /etc/udev.rules.d/55-libsane.rules
still, my system is not able to detect the scanner…
any ideas of what i can do here?
Thanks
it is often that the scanner is owned by root;
see here
Sane Frequently Asked Questions
if you enter the command in a terminal
scanimage -L
you get the device name
and if you go
lsusb
you find out what the number of it is:
then as substitute user (su) also called root
you enter the root password and change the permissions for the device
chmod a+rw /dev/sgd
they suggest
but what works for us is
chmod a+rw /dev/bus/usb/001/003
if for example the lsusb has given 001 003 as the port the scanner is connected
for us using gnome, that allows xsane to open