Honeywell SYA14 Series Manual page 574

Mechanical presses
In this example, two limit switches SM1 & SM2 are used to start and stop a muting
sequence (on a different machine, the sensors could also be photoelectric controls,
ultrasonic sensors or inductive proximity sensors). Correct operation of these sensors
is monitored by the muting module.
As soon as the press tool reaches the bottom dead center, the SM sensors are
activated by the rotation of the rotating disk cam and start the muting sequence. The
limit switches keep their position till the press tool reaches the top ded center. The
rotation of the rotating disk cam releases both limit switches and interrupt the muting
sequence.
INCORRECT INSTALLATION
•
The position of the second sensor SM2 cam must be adjusted so that the SM2
sensor is activated when the press tool reaches the bottom dead center (or when the
press tool reaches a position at 6 mm above the bottom dead center).
•
Do NOT mute the ligth curtain during the closing stroke of the press
Failure to comply with these instructions could result in death or serious injury.
SENSORS COINCIDENCE TIMING (tmax) AND MUTING DURATION
(∆max)
•
Both sensors SM1 & SM2 must be activated within a preset time frame 8 ms < t <
tmax. The setting of the timing tmax also sets the muting maximum duration ∆max : select the
tmax timing corresponding to the shortest muting duration ∆max allowing the operator to
carry out the manual operation (refer to chapter 2.4.2 SM inputs).
•
On a press, both limit switches must be activated within the following time frame :
8 ms < t < 1s. The maximum duration ∆max of the muting sequence must be set to 1
mn. These settings are available on delivery.
Failure to comply with these instructions could result in death or serious injury.
40 107004-15 EN FR26 ROW 0899 Printed in France