Rockford Systems, LLC
1-800-922-7533 (U.S.A. only)
15
USING THE ACTUATOR WITH THE FLAG
The flag is designed for use with the actuator to test the
entire control loop on machines equipped with photo-
electric presence sensing devices (light curtains).
The object of this type of test is to initiate machine stopping
by interrupting the presence sensing device. That is, place
an obstruction in the sensing area of the device which will
cause the device to actuate, thus stopping the machine.
In this way, the response time of the entire “safeguarding
system”from the device, through the machine electrical
control circuit, valves, air exhaust, clutch release brake
effectiveness are included in the resulting stop-time test
(hydraulic and pneumatic machines do not stop in the
same manner).
To install the flag on the actuator, remove the pushbutton
plate and the support foot from the actuator with the allen
wrench provided. Attach the flag to
the actuator and tighten with the
allen wrench.
Note: Make sure the flag is installed
so the felt material will interrupt the
sensing field of the light curtain.
See photos.
Hold the actuator just outside the
sensing area of the light curtain.
See photo at right.
When the actuator releases,the flag
should penetrate the sensing area,
initiating the machine stop signal.
When the machine is cycled and
reaches the 90°position in the
stroke, a stop signal is initiated
which energizes the actuator
releasing the flag into the sensing
area. See photo at right.
In order to get accurate readings,
make sure the ram or plate
has not closed completely, and
that the machine has not gone
through the bottom of the stroke
(after the machine has stopped).
The displayed stopping time
includes the presence sensing
device, the machine control and
brake response time.
Machines using presence sensing
devices have other mandated
control requirements (control
reliability and brake monitors,
for example) which should be
in place and operating properly
when testing the machine for its
stopping time.
Note: When using the flag to check the stopping time of
the machine, do not add the response time of the light
curtain in the
MM PARAMETER 2 SAFETY DISTANCE
setting Submenu
P2 RESPONSE
Time.
Photo 3.4
Photo 3.5
SECTION 3—OPERATING INSTRUCTIONS
Stop-Time Measurement Device
