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The most complete and versatile line of
metering, blending and hoppering equipment for dry solids.

NOTE:
This Manual contains certain information deemed confidential and proprietary to Acrison and is
provided to the purchaser or user of Acrison equipment with this stipulation. This document must not
be reproduced, copied, loaned, transmitted or otherwise disposed of either directly or indirectly, in
whole or in part, without the expressed written consent of Acrison Inc.
Acrison products are manufactured under the protection of various patents both domestic and foreign.
Copyright 2000—Acrison Inc.— all rights reserved.
TABLE OF CONTENTS
1.0 IMPORTANT SAFETY INSTRUCTIONS....................................................................................................................3
Operator Safet
y
..........................................................................................................................................................3
2.0 INTRODUCTION.........................................................................................................................................................4
About This Manual......................................................................................................................................................4
2.1 Model 105 Series of Volumetric Feeders.............................................................................................................4
2.2 Glossar
y
................................................................................................................................................................6
3.0 INSTALLATION AND OPERATION ...........................................................................................................................8
3.1 Installation.............................................................................................................................................................8
3.2 Feed Output Adjustments.....................................................................................................................................9
3.3 Operational Adjustments ....................................................................................................................................10
4.0 MAINTENANCE— DISASSEMBLY/REASSEMBLY .................................................................................................11
4.1 Meterin
g
Au
g
er ...................................................................................................................................................11
4.2 Dischar
g
e C
y
linder .............................................................................................................................................12
4.3 Intromitter (Conditionin
g
Au
g
er) .........................................................................................................................12
4.4 Conditionin
g
Chamber........................................................................................................................................12
4.5 Seal Housin
g
and Gearbox Assembl
y
—T
y
pe PB .............................................................................................13
4.6 Replacin
g
Seal Packin
g
.....................................................................................................................................15
4.7 Universal Gearbox..............................................................................................................................................16
4.8 Drive Motor and Gear-reducer ...........................................................................................................................17
4.9 Tachometer Assemblies (DC Drives).................................................................................................................17
4.10 Feeders with Quick-Clamp Construction..........................................................................................................20
5.0 SAFETY INTERLOCKS ............................................................................................................................................20
6.0 MAINTENANCE— General .......................................................................................................................................20
6.1 Bearin
g
s..............................................................................................................................................................20
6.2 Gearbox ..............................................................................................................................................................20
6.3 DC Variable Speed Drive...................................................................................................................................21
6.4 AC Variable Speed Drive ...................................................................................................................................21
6.5 Seal Assembl
y
....................................................................................................................................................21
6.6 Cleanin
g
..............................................................................................................................................................21
6.7 General ...............................................................................................................................................................22
7.0 RECOMMENDED SPARE PARTS ..........................................................................................................................22
OUTLINE SCHEMATICS
Basic Feeder Outline— Fi
g
ure 1...............................................................................................................................24
Double Concentric Au
g
er Drive (with T
y
pe PB Gearbox)—Fi
g
ure 2 ......................................................................25
Double Concentric Au
g
er Drive (with Universal Gearbox)— Fi
g
ure 3 .....................................................................26
Double Concentric Au
g
er Drive (used with T
y
pe PB Gearboxes)— Fi
g
ure 4 .........................................................27
Drive Assembl
y
with Options—Fi
g
ure 5 ..................................................................................................................28
Optical Tachometer Assemblies—Fi
g
ure 6 .............................................................................................................29
Ma
g
netic Tachometer Assembl
y
—Fi
g
ure 7.............................................................................................................30
WARRANTY....................................................................................................................................................................31
2

1.0 IMPORTANT SAFETY INSTRUCTIONS
Operator Safety
THIS EQUIPMENT CONTAINS ROTATING COMPONENTS. TO AVOID POSSIBLE BODILY INJURY,
POWER TO THIS EQUIPMENT MUST ALWAYS BE DISCONNECTED BEFORE THE EQUIPMENT IS
OPENED OR PRIOR TO PERFORMING ANY MAINTENANCE WHATSOEVER. DO NOT CLEAN
WHILE OPERATING. NEVER PERMIT AN OPERATOR OR ANY PERSONNEL TO PLACE HANDS,
FEET, APPAREL OR ANY OBJECT INSIDE OR NEAR THE INLET, OUTLET OR ANY FUNCTIONAL
AREA OF THIS MACHINE WHILE POWER IS ON.
This equipment can be installed in a variety of configurations predicated on the overall process design
and/or the physical equipment arrangement. It is the buyer’s or user’s sole responsibility to (1), define the
need for and to subsequently ensure that any safety device(s) or associated safety device(s), other than
that normally furnished by Acrison as standard, is provided in accordance with the specific installation
and operational parameters of the equipment, and (2), define the need for and assure compliance with all
applicable safety laws, rules and regulations.
If safety devices are not specifically included with the original equipment (based on the specifics of a
given installation), Acrison can, at the user’s expressed request only, provide whatever safety device(s)
the buyer or user deems applicable. If Acrison is asked to make such recommendations prior to operation
of the equipment, said recommendations are only advisory and do not impose any obligation or liability
upon Acrison unless Acrison is expressly requested to provide the safety device(s), and does so.
It is the buyer’s or user’s sole responsibility to establish safety procedures and operational instructions to
safeguard the operator(s) during maintenance, cleaning or any use of the equipment whatsoever and to
subsequently ensure that the equipment is operated in conformance with all applicable safety procedures,
laws, regulations and instructions. It is also the buyer’s or user’s sole responsibility to enforce all safety
regulations and operational instructions and to maintain the equipment in a safe condition (guards in
place, warning, caution and/or important labels affixed, electrical boxes secure, interlocks operational,
etc.). In particular, all warning and caution labels must be maintained in a readable condition and, if
necessary, replaced with new labels. These labels are available free of charge on request from Acrison
Incorporated.
Because the nature of the equipment does not always make it possible to prevent operator access to
rotating components, under no circumstances should maintenance or cleaning be performed on the
equipment without first disconnecting all power.
The above WARNING and CAUTION symbols, where displayed within this Manual, are intended to
draw the attention of the user to a potential for risk of personal injury and/or damage to the
equipment if the correct operating procedures are not followed.
IMPORTANT
The equipment is supplied for the specific duty for which it was originally sold and as stipulated on
Acrison’s Equipment Specification and Parts List Documents. It is not recommended to use this
equipment for any other purpose without the expressed written consent of Acrison Incorporated.
WARNING CAUTION
²²
3

2.0 INTRODUCTION
About This Manual
This Manual has been produced as a guide to the correct installation, operation and maintenance of the
Acrison equipment to which it refers. It has been created to provide concise, yet comprehensive product
information to enable the user to obtain long term maximum benefits from the equipment. If there are any
details about this Manual, the equipment or any other activity of Acrison that require further explanation,
please do not hesitate to contact Acrison’s Customer Support.
2.1 Model 105 Series of Volumetric Feeders
Acrison’s Models 105, 105X and 105Z are auger type volumetric feeders, specifically designed for the
accurate and dependable metering of a wide variety of dry solid materials, usually of an amorphous
(powdery) nature.
Metering is accomplished by the feeder’s feed auger which produces a given volumetric output
(volumetric displacement) for each revolution. Normally, the speed of the metering auger is adjustable
over a selected drive turndown ratio, and various size metering augers are available to provide a broad
range of feed output capacities.
Introduced in 1964, Acrison’s highly recognized Model 105 Series of Volumetric Feeders have admirably
survived the brutal test of time, with the unprecedented distinction of ranking highest in worldwide user
preference and recognition. The uniquely versatile and highly viable Double Concentric Auger Metering
Mechanism ensures a constant, uniform and accurate volumetric feed of a countless number of dry solid
ingredients.
MODEL 105 VOLUMETRIC FEEDER
4

As can be seen from the above Illustration, the large “conditioning” auger (or Intromitter) rotates in the
same direction as the smaller “metering auger,” but at a much slower speed. In operation, as these
augers rotate, a constant and uniform density of material surrounding the metering auger is created and
maintained by the “interaction” between the two concentrically mounted augers rotating at dissimilar
speeds. When product flow characteristics so require, a reverse helical section, added to the Intromitter
(or conditioning auger), produces a bi-directional flow pattern to assist in ensuring optimum density
control. And in order to best handle the countless number of dry solid ingredients efficiently and
effectively, Acrison has designed and manufactures a variety of conditioning augers, the selection of
which is determined by the specific handling characteristics of the material being metered. As standard,
the conditioning auger, discharge cylinder, seal components and double auger drive shafts are 304
stainless steel. The metering auger is 316 stainless steel.
In addition, as the conditioning auger rotates, a gentle inward and outward radial action is generated. The
inward radial action “conditions” the material, establishing uniform product density, while simultaneously,
filling the metering auger from a full 360 degrees. The outward action creates agitation within the
feeder’s conditioning chamber totally eliminating any possibility of starving the double augers. This
agitation also transmits upwards to product stored above, with the extent of penetration totally dependent
upon the characteristics of the material being fed. In many instances, a “live” hopper of sorts supplies
product to Model 105 Feeders.
The Model 105 Series of Volumetric Feeders consists of three model sizes…the Model 105, the
Model 105X and the Model 105Z. The Model 105 utilizes a 6 inch diameter Intromitter (or
conditioning auger), the Model 105X is equipped with an 8 inch diameter conditioning auger, and
the Model 105Z is furnished with a 10 inch diameter conditioning auger. Feeder model selection is
determined by the handling characteristics of the product or products to be fed in conjunction
with the required feed rate.
There is a variety of metering auger sizes available for use with the Model 105 Series of Volumetric
Feeders. Please refer to the Capacity Chart within Section 3.3 of this Manual for the feed output
capacities produced by the various size metering augers available with the particular model feeders.
The Model 105Z Feeder, the largest of the Model 105 Feeder Series, is generally recommended for use
with large storage hoppers, bin dischargers of sorts, or those special applications which require the broad
conditioning chamber (product inlet area), and the subsequent versatility afforded by this particular model
feeder. As standard, the various Model 105 Volumetric Feeders are furnished either with flanged
ILLUSTRATION
Metering
Auger
Conditioning/Feed
Chamber
Conditioning
Auger
5

conditioning chambers (onto which various size hoppers or chamber covers can be attached), or with an
integral one cubic foot supply hopper.
The standard variable speed drive for the Model 105 Series of Volumetric Feeders is DC, controlled by
an Acrison variable speed SCR controller. The Model 105 utilizes a 1/2 HP DC motor, the Model 105X is
furnished with a 3/4 HP DC motor, and the Model 105Z with a 1 HP DC motor. The standard DC motor is
totally enclosed.
Acrison offers a number of variable speed SCR/DC controller models for use with the Model 105 Series
of Volumetric Feeders. Depending upon the selected model controller, either a 30:1 or 50:1 drive
turndown ratio is provided, with a number of these controllers available with an assortment of optional
control functions. They are also capable of being furnished in an assortment of enclosures to suit the
specifics of a given application. Please refer to the selected SCR/DC controller Data Specifications for a
detailed description. Specific instructions relating to the variable speed controller are furnished separately.
2.2 Glossary
AC Motor —
An AC Motor is an alternating current motor, available as an optional motor to power the
feeder. AC Motors may be operated at a constant speed, without variable speed control, or may be
furnished with a variable frequency controller for variable speed control. Variable speed AC Motors
generally provide a 10:1 or 15:1 drive turndown ratio.
Conditioning (Feed) Chamber —
The all-steel Conditioning Chamber houses the Double Concentric
Metering Auger Mechanism. The supply hopper of the feeder attaches directly to the top flange of the
Conditioning Chamber. Model 105 Feeder Series Conditioning Chambers are designed without any type
of convergence that could prove detrimental to product flow and/or feed.
DC Motor —
A DC Motor is a direct current motor, selected as the standard drive motor for the Model
105 Series of Feeders because of its wide range variable speed characteristics, and ability to provide
very precise and reliable speed control/regulation. DC Motors can produce either a 30:1 or 50:1 drive
turndown ratio when used in conjunction with Acrison equipment.
Discharge Cylinder —
The Discharge Cylinder is the discharge spout of the feeder, within which the
metering auger rotates, and through which the metering auger discharges product.
Drive Isolation (Magnetic) Clutch —
The Drive Isolation Magnetic Clutch is a device mounted between
the feeder’s drive motor and gear-reducer that, when deactivated via a lockable switch, prevents the drive
motor from powering the feeder’s metering mechanism (typically used as a safety interlock).
Drive Motor —
The Drive Motor is the motor (AC or DC) that powers the feeder.
Gearbox —
The feeder’s Gearbox contains the gearing mechanism that provides the desired ratio of
speed differential between the smaller metering auger and the larger conditioning auger (Intromitter).
Gear-reducer —
The Gear-reducer reduces the motor speed to the desired speed entering the gearbox.
The Gear-reducer is available with one of several ratios, determined by product characteristics and
application parameters, and establishes the maximum speed of the metering auger and thus, its
maximum feed rate output capacity. The feeder’s drive motor flange-attaches to the Gear-reducer, and
the Gear-reducer flange-attaches to the feeder’s gearbox.
Intromitter (Conditioning Auger) —
The various Model 105 Series of Volumetric Feeders include
Acrison’s unique Double Concentric Auger Metering Mechanism, with the larger of the double augers
called the Intromitter (or Conditioning Auger). The Conditioning Auger (or Intromitter) is normally a
helically wound device but can also be provided in other configurations as well, based on the handling
characteristics of the product(s) being handled.
6

The Conditioning Auger produces a bi-directional, opposing sliding movement of product within the
confines of the Double Concentric Augers [produced by the speed differential between the Intromitter
(Conditioning Auger) and the slower rotating metering auger] that gently conditions the material to a very
consistent density while simultaneously, filling the centrally located and smaller metering auger from a full
360 degrees.
Metering Auger —
The Metering Auger is a spiral type conveying device (with or without an integral
center-shaft), centrally situated inside the larger conditioning auger (or Intromitter), that is utilized to
volumetrically displace (meter) product out of the feeder’s conditioning chamber and through the
discharge cylinder. Many sizes and designs are available, the selection of which is determined by the
feed rate and the physical characteristics of the product. Rotation of the Metering Auger, within the
discharge cylinder, produces a specific volume of product discharge for each revolution.
Right Angle Downspout
—
Attached to the end of the feeder’s discharge cylinder, a Right Angle
Downspout provides an easy means for connecting the output of the feeder to auxiliary equipment, also
providing the means for a simple, dust-tight connection.
SCR Controller —
The SCR Controller is the variable speed electronic control system that precisely
regulates (and maintains) the speed of the feeder’s DC motor to the selected speed setting. Normally,
SCR Controllers provide either a 30:1 or 50:1 drive turndown ratio, depending upon the selected
controller model.
Seal Cap —
The Seal Cap exerts pressure upon the seal packing (which is located within the cylindrical
extension of the seal housing) to ensure a positive seal for the rotating drive shaft(s).
Seal Housing —
The Seal Housing assembly attaches to the feeder’s gearbox and to the conditioning
chamber. It provides the housing through which the Double Concentric Auger drive shaft assembly exits
the gearbox and enters the conditioning chamber, and includes the sealing means at the rear of the
conditioning chamber so that product does not escape from (the conditioning chamber) around the
primary (outer) conditioning auger drive shaft.
Seal Packing —
The Seal Packing is the material (usually a synthetic braided material) that produces
the seal for the two independent rotating drive shafts of the feeder. The metering auger drive shaft
rotates within the conditioning auger drive shaft at a different (faster) speed. Packing that seals the
metering auger drive shaft is compressed between the outside of the metering auger drive shaft and the
inside of the conditioning auger drive shaft. Packing to seal the conditioning auger drive shaft is
compressed between the outside of the conditioning auger drive shaft and the inside of the cylindrical
extension of the seal housing.
Supply Hopper —
When supplied, the feeder’s Supply Hopper, integral to the conditioning chamber, or
which attaches to the flange of the conditioning chamber, contains the feeder’s supply of product.
Tachometer —
When included, a digital Tachometer provides very precise speed sensing to assist in
producing the highest possible degree of DC motor speed regulation, linearity and repeatability. Acrison
SCR controllers that provide a 50:1 drive turndown ratio, or those used in conjunction with Acrison weigh
feeders, utilize a Tachometer for speed feedback data. The Tachometer may be directly connected to the
output shaft of the DC motor, through a specially designed gear-reducer, or may be installed between the
motor and gear-reducer.
Torque Limiter Coupling —
An optional device mounted between the feeder’s gear-reducer and
gearbox to provide adjustable overload protection of the drive components.
7

3.0 INSTALLATION AND OPERATION
²WARNING: OBSERVE ALL WARNING AND/OR CAUTION LABELS. Do not ap-
proach any rotating object while the feeder is operating or
connected to a power source.
3.1 Installation
To install and operate, proceed as follows:
1. Open the shipping crate and unbolt the feeder from the skid by removing the four bolts (one in
each corner) which secure it to the skid.
2. Check the feeder for signs of physical damage. If any physical damage is noticed, advise the
shipper and Acrison immediately. Under such circumstances, do not install the equipment.
3. If warning or caution labels are not affixed to the feeder in accordance with the diagram below,
contact Acrison at once.
4. When ready for installation, place the feeder in position on a relatively level surface and secure
the feeder to its mounting using bolts sized to easily fit within the four mounting holes.
5. Connect the feeder/controller to the electrical supply, in accordance with the approved wiring
diagrams.
Model 105 Feeder Series
8

²WARNING: All wiring to the equipment must be made by the user or pur-
chaser. This includes all interconnections between the equipment
and any Acrison supplied control panel(s) as well as any safety
switch(es) and/or safety interlock(s) either required by law and/or
the electrical standards of the user.
6. The feeder is factory lubricated and ready for operation, although lubrication verification is
recommended. Please refer to Section 6.0 (Maintenance), paragraphs 6.1, 6.2, 6.3 and 6.4.
7. Start the feeder and check the metering auger for proper rotation.
CAUTION: When facing the open (discharge) end of the discharge cylinder, direction of
rotation of the metering auger MUST be clockwise (CW). If rotation is not
correct, resultant damage to the feeder may occur. In addition, product
discharge out of the feeder must fall freely and without any restriction
whatsoever.
NOTE:
Operating the feeder in the incorrect direction (especially when filled with product) could
cause the metering auger to detach from the threaded connection to its drive shaft.
Should this occur (on a feeder which is filled with product), most likely, the feeder will
need to be emptied in order to re-attach the metering auger.
Also, if the feeder’s Intromitter (or conditioning auger) is equipped with a threaded
connection (optional), the same situation (as described for the metering auger) can
occur.
8. Fill the feeder’s supply hopper with product.
NOTE:
When in operation, product level in the feeder’s supply hopper should be kept at least 4
inches above the top of the Intromitter (conditioning auger). Below this level, inaccurate
feed may occur.
9. Allow the feeder to operate for approximately one minute to allocate time for the feeder to properly
“condition” the product and to ensure that the metering auger is operating with a complete supply
of material.
10. While the feeder is operating, set the feed output at a given setting and collect a few samples for
a predetermined timed interval. Weigh these samples and adjust the variable speed drive
accordingly to obtain the desired feed rate.
3.2 Feed Output Adjustments
3.2.1 Variable Speed DC Drive
The discharge rate of any particular size metering auger may be adjusted over an infinitely
variable 30:1 or 50:1 drive turndown ratio (depending on the selected model SCR/DC controller)
by adjusting the output speed of the variable speed drive. For complete information, please refer
to the applicable SCR/DC controller instruction manual.
²
9

3.2.2 Variable Speed AC Drive
The discharge rate of any particular size metering auger may be adjusted over an infinitely
variable 10:1 (typical) drive turndown ratio by adjusting the output speed of the variable speed
drive. For complete information, please refer to the applicable variable speed AC controller
instruction manual.
3.3 Operational Adjustments
3.3.1 The speed (ratio) between the smaller metering auger and the Intromitter (or conditioning auger)
is preselected based on the characteristics of the specific material to be metered, factory preset
for optimum performance. If any feed-related problems are encountered, Acrison should be
consulted for assistance.
3.3.2 For feed rates beyond the furnished metering auger capacity, larger or smaller metering
auger/discharge cylinder sets may be available (which are only interchangeable on the individual
models of the 105 Feeder Series). The output capacities of the various size metering augers may
be obtained from the following Capacity Chart.
Size 30:1
Speed Range 50:1 Speed Range
Minimum Output Capacities
MODEL 105 SERIES CAPACITY CHART
(Capacities shown in cubic feet per hour)
Maximum
Output
105-BC 0.00760.0127
105-C 0.0180.03
105-D 0.0480.08
105-G* 0.580.97
105-F 0.280.47
105-E 0.120.2
105-A 0.00120.002
0.38
0.9
2.4
29
14
6
0.06
105-BB 0.01080.018 0.54
105-CC 0.0280.047 1.4
105-DD 0.0840.14 4.2
105-EE 0.1740.29 8.7
105-FF 0.380.63 19
105-GG* 0.841.4
105-N** 4.06.7
105-KK** 2.43.9
105-HH* 1.42.4
42
202
118
72
105-H* 1.021.7 51
105-K** 1.93.2 96
105-M** 3.25.3 160
105-B 0.0030.005 0.15
*Available on the Models 105X and 105Z only.
**Available on the Model 105Z only.
NOTE:
The preceding Capacity Chart indicates the typical output range
for each size metering auger available with Model 105 Series of
Feeders. However, since the physical properties of the actual
product being metered may have an effect upon the exact
output, the stated capacities could vary.
10