3
ALIGNMENT PROCEDURE
The alignment between the emitting and the receiving units is necessary to obtain the correct functioning of the light
curtain. A good alignment prevents output instability caused by dust or vibrations.
After correct mechanical mounting and electrical wiring user should proceed to alignment procedure and verify results
according to next table. To enter SG2-M dedicated Alignment Mode activate RESET/RESTART/ALIGN input during
Power-On until OSSD red led blinks.
The alignment is perfect if the optical axes of the first and the last emitting unit beams coincide with the optical axes of the
corresponding elements of the receiving unit.
Both first (near the connector) and last beam are used for optical SYNC.
Indication
Rx Led configuration
Alignment status
OSSD Status in
Normal operation
No Sync, check SYNC1
NONE OFF
SYNC 1
aligned
NONE OFF
SYNC 2
aligned
NONE OFF
One ore more
intermediate beam
not aligned
NONE OFF
All beams aligned
BAD
ON
All beams aligned
ON
All beams aligned
ON
All beams aligned
EXCELLENT ON
A
Keep the receiver in a steady position and set the emitter until the yellow
SYNC 1
LED is OFF.
This condition shows the effective alignment of the first synchronisation beam.
B
Rotate the emitter, pivoting on the lower optics axis, until the yellow
SYNC 2
LED is OFF.
C
Delimit the area in which alignment is good and steady through some micro adjustments - for the first and then for the
second unit - so to have the maximum alignment
LEVEL
(
) and then place both units in the centre of this area.
D
Fix the two units firmly using brackets.
Verify that the
LEVEL
on the RX unit is as high as possible and beams are not interrupted, then verify that
all
LEVEL
Led turns OFF if even one single beam is interrupted.
This verification shall be made with the special cylindrical “Test Piece” having a size suitable to the resolution of the
device used (refer to paragraph 2.2.5 “
Checks after first installation
” of Instruction Manual).
E
Switch OFF and ON the device in standard operating mode.
The alignment level is monitored also during device normal operation with the same display (see paragraph 8.1 of
Instruction Manual).
Once the light curtain has been aligned and correctly fastened, the display signal is useful both to check the alignment
and show a change in the environmental conditions (occurrence of dust, light disturbance and so on) via signal level
monitoring.