Download B - Equipment Services and Calibrations

Index
Operations list
1600-SPC
3.3.A LATERAL CENTERING UNIT
3.3.A.1 - Operating cycle
The lateral centering unit is powered by a low inertia D.C. micro-motor and a toothed
belt. The motor is controlled by an electronic circuit board (S.C.C.) and by two pairs
of photocells (installed on the lateral shoulders) plus another photocell, called
intercepting photocell.
Intercepting
photocell
Slowing - down
photocell
Mirrors
Intercepting
photocell
Stop photocells
Slowing - down
photocell
DC Motor
When the panel reaches the intercepting photocell
(FC69), its presence is signalled to the control panel
(S.C.C.). The motor (M5) sets the two lateral shoulders
in motion so that when they close they move the panel
towards the center of the machine.
When both slowing-down photocells (FC75/76) have
been activated by the panel, the motor decelerates
immediately, slowly bringing the lateral shoulders
near to the panel until the two stop photocells are
activated (FC74/FC77).
Servo control for DC motor
PLC
The motor (M5) stops for the period of time selected
on the control panel (S.C.C.). Then, inverting its
rotation, it opens the lateral shoulders again and
finally stops when the backward stop sensor (FC70)
is activated.
Should either the forward movement stop sensor
(FC71) or the backward movement stop sensor (FC70)
not function for any reason, the safety microswitches
(FC72/FC73/FC73A) will take over, cutting off
immediately the power supply to the motor and
activating a failure message.
Ed. 05/01
II-F.1