SG2 MUTING
32/96
5 ALIGNMENT PROCEDURE
The alignment between the emitting and the receiving units is necessary to obtain the correct operation of the light
curtain.
A good alignment prevents outputs instability caused by dust or vibrations.
The alignment is perfect if the optical axes of the first and the last emitting unit's beams coincide with the optical
axes of the corresponding elements of the receiving unit.
Since the light curtain has two beams for the sy
nchronization, let’s call SYNC1 the sync beam at the bottom, the
first beam of the array, and SYNC2 the sync beam on the opposite part of the light curtain, the last beam of the
array.
The figure shows that the first beam is located at the bottom edge of the light curtain, near to led display.
The last beam is at the opposite near the terminator cap. These two beams are the synchronization beams too.
Fig 34 - Description of the beams
The Alignment function can be activated by simply keeping pressed the external normally open push-button linked
to RESET/RESTART/ALIGN input (pin 3 of M12-12 poles
– RX side) at start-up until the second led (red) begins to
blink indicating the activation of the Alignment function, as shown in the following timing diagram. When a good
state of alignment is reached a power OFF and a power ON operation carry back the ESPE in normal operation.
Fig 35 - Alignment timings
