Eagle Microsystems VF100 - Manual (Page 4)

SERIES VF-100 SCREW FEEDER
3
SCHEMATIC, FEEDER WITH MIXER
E-10240
INTRODUCTION:
The EAGLE MICROSYSTEMS Series VF-100 is a dry material volumetric screw
feeder designed to handle powdered and small granular material at feed rates from
0.002 to 65 cu feet per hour, utilizing 3/4 to 3” diameter stainless steel helical
screws. The screws are direct driven by a DC gearmotor and SCR motor controller.
The VF-100 is designed to operate in a hostile environment, where dusty, abrasive,
and corrosive materials are handled. All material contact surfaces are stainless
steel except for units with side wall pulsing or rocking agitation where high strength
Neoprene or Buna N/Vinyl hopper side wall liners are utilized. The VF-100 is
available in two hopper configurations. The first is the sidewall rocking motion
where, a rocker arm assembly is driven from an eccentric mounted on the feeder
drive shaft. This motion rocks plates under the flexible membranes in the side walls
of the hopper, which prevents material arching across the hopper. In this
arrangement the rocking action is directly proportional to the screw speed. The
second configuration utilizes solid S.S. side walls in the hopper. An electro-
mechanical vibrator attached to the outside of the hopper wall is periodically
energized for short periods of time to prevent arching. This method of agitation is
independent of the screw speed, and both the ON and OFF times can be
independently adjusted.
I. PRE-INSTALLATION INSTRUCTIONS:
A. RECEIVING:
The EAGLE MICROSYSTEMS Series VF-100 dry material volumetric screw feeder
is normally shipped via motor freight as a complete assembly bolted to a skid package.