BRAILLO
l
B 650 SW2.1
73
The drawing on this page is meant to help to understand the basic principle of how the dots are print
-
ed. Please also see the drawings on the next page.
The parts in the upper left of this drawing is one of the magnet racks. The parts in the lower right, are
the beam and paper shoes. The magnet racks itself do not move, but the beams and the paper shoes
are moving up and down for every revolution of the eccentric shafts.
Inside each magnet rack there are 45 electrical magnets. The magnets are controlling the long pivot
arms.
When a dot is going to be printed, the magnet is engaged, and the long pivot arm will be drawn
against the magnet poles.
At the same time, the beam and the paper shoe will start to move downwards, and the short pivot
arm will catch the hook of the long pivot arm. The beam will continue to travel downwards, and will
force the printing pin into the paper.
Magnet
Long pivot arm
Short pivot arm
Printing pin
Paper shoe
Beam
Mo
ving up and do
wn
Paper sheet
