30
SWEEP ARM ADJUSTMENT PROCEDURE FOR PROSCAN METAL DETECTOR
EQUIPPED UNITS.
Sweep arms are a commonly installed reject device
on Advanced Detection Systems units. It is often
necessary to adjust the sweep arm velocity beyond
the standard factory settings.
On the side of the conveyor frame, you will see an
air regulator and control solenoid. Air pressure for
the sweep arm should be approximately 80-100psi.
This is adjusted using the air regulator control knob
located on the top of the regulator assembly.
Changing the air pressure does not affect the
speed or return rate of the sweep arm.
Located next to the regulator, and connected to it, is
the reject control solenoid.
By adjusting these two set screws, you can
control sweep arm speed. These set screws will
not change the activation reaction time or the
amount of time the arm is extended. These
variables are adjusted using the
Reject Delay
Time
and
Reject Operate Time
in the metal
detector menu.
By adjusting the sweep arm speed on either the retreat or attack rate, it may be necessary to adjust the
cushioning screws located on the air cylinder to prevent the arm “slamming”. The cylinder relies upon internal
air pressure to create a cushion, slowing the speed of the arm as it retracts or reaches the limits of its range of
motion.
Located next to the master set screw is a small recessed set screw. There are two, each located on the ends of
the cylinder. One controls the cushion for the arm on extension, the other controls the cushion for the arm on
retraction. When adjusting these set screws, use small increments, ¼ to ½ turns only.
Over adjustment can
damage the unit.
The yellow button is the test button,
press this to activate the solenoid
without tripping the detector.
The yellow button activates the
solenoid manually, without tripping
the metal detector.
This set screw controls the attack rate,
or the speed in which the sweep arm
extends.
This set screw controls the retreat
rate, or the speed in which the sweep
arm retracts.