SECTION 2—INSTALLATION OF COMPONENTS
Detect-A-Finger
®
Drop Probe Device-Welder
Rockford Systems, LLC
10
Call 1-800-922-7533
Drop
Rod
Drop
Rod
Arm
Limit
Switch
Return
Spring
Rotary
Solenoid
Bridge
Rectifier
Sensing Probe Assembly
The drop rod is allowed to drop by gravity when the rotary solenoid is energized. The action arm return spring returns
this assembly when the power is removed. The DC voltage for the rotary solenoid is obtained from a full-wave bridge
rectifier. The drop rod is guided in nylon bearings for long life and smooth operation. The limit switch actuates the
control relay in the control box at the end of the drop rod stroke.
Mount the sensing probe assembly as far forward as possible to allow for adjustments and electrode maintenance,
and to provide for minimum angle of the sensing probe. This position will also contribute to a long mechanical life of
the device since it minimizes the side loading on the drop rod bearings.
