Metalfab Metatech MT-X-XXX Series Volumetric Screw Feeder - Manual (Page 2)

The MetaTech Feeder is a simple, rugged and accurate Volumetric Feeder used
for the dependable metering of dry solid materials into a variety of
manufacturing processes. It consists of a trough assembly. a hopper in various
capacities, a GearMotor Drive (which is available in many input power
configurations and ratios), a Metering Screw and Tube in sizes and styles to fit
the application. The metering screw is coupled to the variable speed drive,
either AC with a VFD or DC with an SCR; all mounted on the trough assembly
with isolation feet mounts or mounted to a custom frame.
The steep, sloped hopper, with its large rectangular outlet, allows for material
flow to the metering screw. The metering screw consists of three spiral wraps,
the largest being the agitator which assists the motion of produce within the
trough, the mid sized The function of this screw is to keep the material in motion
and also "condition" the material to a constant density while insuring complete
filling of the metering screw flights. Hence, accuracy is maintained while rates
are varied by screw speed changes.
Installation
The MetaTech Feeder is shipped complete and ready for operation. For
enhanced safety, the unit should be bolted in place, absent this there are four
(4) levelers positioned under the base which are equipped with rubber pads.
Room should be provided at the discharge end to allow for screw removal.
Normally, 20" clearance is sufficient.
Electrical Requirements
Standard units are provided with AC Inverter Duty Drives which can have their
own VFD controllers mounted integral to the motor housing or stand alone
VFDÅfs of the Customer specification. Typical VFDÅfs capable of varying output
frequency from 0 to 100 Hz, minimum operation at 5 hz is recommended for
adequate cooling. The controller may be mounted at the Feeder location or
remotely. SEW Eurodrive Inverter Manual and DC SCR Control Manuals are
attached at the end of this manual. All standard motors are TEFC (totally
enclosed, fan cooled), severe heat applications may require TEBC (blower
cooled) models which will require a separate power input for the blower.
Inverter Duty Motors are dual voltage 230/460 three phase. Inverter Drives
(VFDÅfs) are 230 vac OR 460 vac models special applications for single phase
input power can be accommodated as can 380vac, 575vac and 50Hz models;
contact Metalfab Inc. for these special applications and consult Inverter Drive
Manuals and for specifications. For amperage considerations 460/3 motors will
draw 1 amp per Hp and should be equipped with supply capacity 2X this nominal