REO REOVIB series System manual

REOVIB
Control units for flexible automation
Hand book for installing and setting up
REOVIB controllers
Concepts, questions and background information

Contents
1.0 General information about the REOVIB product range........................................................................ 1
2.0 Background to feed engineering ........................................................................................................... 2
2.1 The vibration wave form .....................................................................................................................2
2.2 The feed waveform .............................................................................................................................3
2.3 Vibrating frequency and resonance....................................................................................................3
2.3.1 Resonant condition ......................................................................................................................4
2.3.2 Under critical operation ................................................................................................................4
2.3.3 Over critical operation ..................................................................................................................4
3.0 Operating methods for vibratory feeders................................................................................................4
3.1 Unregulated drive control....................................................................................................................4
3.2 Regulated drive control.......................................................................................................................5
4.0 REOVIB – Symbols ................................................................................................................................5
5.0 REOVIB – Terms................................................................................................................................. 6
6.0 Functions of controls units.................................................................................................................... 8
6.1 Enable input or Stop/Start input..........................................................................................................8
6.2 Status output.......................................................................................................................................8
6.3 Soft start .............................................................................................................................................8
6.4 Soft stop..............................................................................................................................................8
6.5 Coarse/fine control..............................................................................................................................8
6.6 Air valve output ...................................................................................................................................8
6.7 Pulsed operation.................................................................................................................................8
6.8 Track control .......................................................................................................................................9
6.8.1 Single point control.......................................................................................................................9
6.8.2 Min/Max Control .........................................................................................................................10
6.8.3 Sensor Time-out.........................................................................................................................10
7.0 Controls ................................................................................................................................................11
7.1 Analogue units..................................................................................................................................11
7.2 Digital units .......................................................................................................................................11
7.2.1 Three key control panel..............................................................................................................11
7.2.2 Reset set point to zero ...............................................................................................................12
7.2.3 Six key control panel..................................................................................................................12
8.0 General manufactures instructions for the installation of REOVIB control units ..................................13
8.1 Before installation .............................................................................................................................14
8.1.0 Connection diagram for frequency drives ..................................................................................14
8.1.1 Setting the mechanical vibrating frequency 14
8.2 Setting the feeder throughput ...........................................................................................................15
9.0 Setting up regulation control of frequency ...........................................................................................15
9.0.1 Setup menu for regulation control..............................................................................................16
9.1 Relationship between acceleration and amplitude ...........................................................................16
9.2 Setting up instruction for using a controller in regulation mode ........................................................17
9.3 Determine resonant frequency .........................................................................................................17
9.3.1 Manual setting of the vibrating frequency ..................................................................................17
9.3.2 Automatic frequency search.......................................................................................................17
9.4. Optimizing regulation .......................................................................................................................17
9.4.1 Control range adjustment...........................................................................................................17
9.4.2 Optimizing the regulation circuit.................................................................................................17
9.5 Diagnostic displays for non-optimized regulation settings................................................................18
10.0 Working frequency of the coil.............................................................................................................18
11.0 Measurement of output current and voltage.......................................................................................18
12.0 Accelerometer mounting ....................................................................................................................18
13.0 Trouble shooting - analogue controllers .............................................................................................19
14.0 Trouble shooting - frequency controllers ............................................................................................20

1.0 General information about the REOVIB product range
The REOVIB range from REO ELEKTRONIK AG comprises all equipment produced for vibratory feeder
engineering. This includes controllers for vibratory feeders, measuring and monitoring equipment, with corre-
sponding transducers.
All types of feeder control units are available, using thyristors or triacs with phase-angle control or the newer
technique employing a frequency inverter. There are free-standing or panel-mounting versions, with many
variations to choose from and integrated functions for controlling product flow, depending on the unit type.
In most instances the product throughput is set by using a front-panel potentiometer or the user display but
the panel mounted units have inputs provided for an external, throughput set-point source from a 0…10V
signal voltage, 0(4)…20mA signal current or a potentiometer.
Control signals inputs, e.g. Start/Stop (Enable), or for sensors, e.g. track control, are usually brought out to
connectors in the case of enclosed units, or to terminals where panel-mounted versions are concerned.
REOVIB thyristor or triac controllers provide step-less adjustment or regulation of the feeder throughput
setting by varying the output voltage. The vibrating frequency is always dependent on mains frequency be-
cause thyristors and triacs can only influence the available supply half-wave (phase-angle control). When
only one half of the mains sine wave is selected the feeder vibrates at the same frequency as mains fre-
quency and when both halves are used the feeder vibrates at twice that of mains frequency. Using one half
of the mains sine wave is referred to as half-wave operation or 3000 vibrations/min (for a mains frequency of
50Hz). The use of both halves of the mains sine wave is called full-wave operation or 6000 vibrations/min
(for a mains frequency of 50Hz). A 60Hz supply correspondingly gives 3600 and 7200 vibrations/min.
REOVIB control units are equally suitable for operating with either frequency and can be set, by using a link
switch, to match the feeder frequency.
REOVIB Frequency inverter specially developed for use with vibratory feeders provides a highly stable,
drive frequency, independent of the supply frequency, tuned to that of the feeder and adjustable in 0.1Hz
steps. It is said by feeder manufacturers that the mechanical performance compares with that of mains fre-
quency. After assembly, using standard spring packs and components, the feed system can be electronically
fine-tuned to give optimum performance. The controller seeks for the resonant frequency of the feed system,
at a comfortable feed level, using a patented method, and then saves this in memory for future use.
Throughput setting of the feeder is achieved by using the variable output voltage of the controller. The am-
plitude is held constant whilst the controller is working in regulation mode thus compensating for widely
varying loads, caused by high and low product levels. The amplitude feedback signal is generated from an
accelerometer, fitted onto the feeder. A further advantage is gained through energy saving because the in-
coming mains power is reduced to 1/3 of that used by previous controllers. The feeders also run much
quieter and component orientation is more efficient because of the sinusoidal output current. In addition to
easy control of the feeder, other functions such as track and sensor control are integrated into the control
unit. Input and output ports are available for interlocking with other units or a supervisory system. The touch-
panel and display are user-friendly and allow settings to be made accurately and repeatable. User settings
can be saved and recalled.
REOVIB measurement and monitoring units comprise simple instruments for controlling the vibration
waveform (converts signal to 0…100% display), or units used for maximum and minimum limit monitoring.
An accelerometer is fitted onto the feeder to provide a feedback signal.
1

2.0 Background to feed engineering
The use of mechanical vibrators for feeding material, dosing, screening or mixing of goods is long estab-
lished. Drives, with so called out-of-balance motors and vibrating equipment with electromagnetic drives are
certainly the most widely applied. Electromagnetic drives are more frequently used in automation engineer-
ing and hence some fundamental differences require further explanation. In general one is referring here to
vibratory feeders.
Vibratory feeders comprise the actual drive unit, including one or more coils, a reaction base, a spring sys-
tem and tooling, which can be in the form of a tray, tube, track or a bowl with a spiral track inside. Tray
shaped vibratory feeders that deflect in one direction, are used to convey material and are generally referred
to as “Linear Feeders“. Vibratory feeders with a spiral track and a spring/coil combination that gives a com-
posite motion that are used for sorting, orientating and feeding parts, are known as “Bowl Feeders“.
2.1 The vibration wave form
The vibratory motion in the case of a vibratory feeder moves backwards and forwards in a straight line. The
direction of movement is at a specific angle relative to horizontal, referred to as the “vibrating angle“. The
movement plotted against a time axis gives a curve approaching the shape of a sine wave.
s Deflection
a Acceleration
v Speed
Diagram 1 The vibration curve
The sinusoidal waveform is derived from the formula
[mm]
where “s“ is the time based vibration movement, s0the amplitude (half of the total deflection) and ωthe cycle
frequency (2 πf ).
The vibrating speed is derived from the differential of deflection over time
with
the acceleration
with
2
tss ω sin
0
=
ts
dt
ds
v ωω cos
0
==
ω
00 sv =
ts
dt
ds
a ωω sin
2
0
2
2
−==
2
00
ω sa =
S
a
v
S,a,v
Sn
t
a0
s0
v0

2.2 The feed wave form
Diagram 2 shows a vibratory drive unit with a unidirectional deflection (linear feeder). The direction of move-
ment is determined by the vibrating angle. The material on the track is accelerated along the deflection path.
Diagram 2
The product describes a trajectory on the track (micro throw principle) which is determined by the vertical
component of the vibration acceleration exceeding that of the basic acceleration. The product lifts off the
feed track during forward movement, follows the trajectory over the time period tF(see diagram 3), meets the
feed track again, where it remains for a time period tB, in contact with the feed track until the cycle starts
again. The trajectory is so small and fast that it cannot be discerned with the naked eye.
tFTrajectory time
tBContact time
sf Product movement
s Deflection
a Acceleration
v Speed
Diagram 3 Trajectory path of the product
In practice, the feeder throughput is of particular interest. This is dependent on the horizontal component of
the vibrating speed of the feeder during the contact time tBand because the take-off point does not coincide
with the highest horizontal speed, the product speed never reaches that of the vibrating speed. The achiev-
able feeder throughput is different for each product and depends on the vibrating frequency and amplitude.
An increase of the feeder throughput cannot be achieved by adjustment amplitude alone; the correct vibrat-
ing frequency must also be selected for the product.
2.3 Vibrating frequency and resonance
Every vibratory system has a resonant frequency, which relates to its mass, spring constant and product
weight. If a feeder could be driven at resonance, in theory the amplitude is infinite and the system would be
uncontrollable. In practice such a condition cannot be achieved without something extra. Mechanical reso-
nance, however, displays a very specific characteristic and so the vibrating frequency of a feeder cannot be
too far away from resonance, otherwise the achieved deflection would be negligible. Furthermore, a damped
system, working at resonance, is not viable because every change of the damping caused by the product
would result in a change of the amplitude and hence the feeders throughput.
Conversely, operating at resonance also offers some advantages. The energy usage is greatly reduced and
the vibration movement becomes much more harmonic (sinusoidal), which results in a much quieter opera-
tion. Modern drive controllers such as the REOVIB MFS range constantly monitor the vibration movement
and provide a regulated operation, whereby the vibrating frequency is maintained at resonance and ampli-
tude is held constant.
3
S
sf
a v
tFtB
S,a,v,sf
t
sf
Trajectory
Vibrating angle α

2.3.1 Resonant condition
Diagram 4 shows various resonance curves for a feeder with different damping levels. This demonstrates the
relationship between damping and the shift in resonant frequency.
a = without damping (theoretical).
b – d = increasing damping levels.
fa= drive frequency.
fres = resonant frequency
fres > fa= under critical operation
fres < fa= over critical operation
Diagram 4
One can see from the curves that the resonant frequency of the vibrating system reduces with increased
damping. Different feeder drive characteristics can be achieved by tuning the vibratory system to a value
above or below the drive frequency. In practice both possibilities can be applied.
2.3.2 Under-critical operation
For under-critical operation the drive frequency fais lower than the resonant frequency fres. When the damp-
ing increases, by loading the feeder, the resonant frequency gets closer to the drive frequency. In this way
the system compensates itself and is unaffected by load changes. The power and the deflection run in phase
in this drive method, i.e. the air gap at maximum current is smaller than at rest. This method of tuning is cho-
sen mainly for large feed conveyors or products that are inclined to interlock. At very low frequencies the coil
yoke can lock-up when the current comes into phase with the vibratory movement., defined by the under fre-
quency limit.
2.3.3 Over-critical operation
For over-critical operation the drive frequency fais greater than the resonant frequency fres. When the damp-
ing increases the amplitude increases. Likewise, interlocking products tend to cause a reduction of the
feeders resonant frequency. In this operating method the power and vibratory movement are phase op-
posed, which dictate the use of a large reaction base and a higher current draw. In practice this method of
tuning is used in automation engineering where a large reaction base can be used, in most instances for
good engineering reasons, and the resonance curve is very flat because of high damping. The forced
stability achieved by high damping must, however, be traded against a high power usage.
3.0 Operating methods for vibratory feeders
3.1 Unregulated drive control
For unregulated control (output voltage control) the feeder must be tuned to operate away from resonant
frequency, by a specific amount. This difference determines the stability of a feeder, when it is subjected to
load changes, caused by the product. Depending on the feed system, the difference between the tuned fre-
quency and the resonant frequency is approximately ± 3Hz. When controllers with a fixed frequency are
used (e.g. thyristor or triac), the correct frequency is set by changing the spring pack and/or fitting compen-
sation weights. By using controllers that have a variable frequency output (frequency inverters), the electrical
drive frequency can be easily set to match the mechanical frequency, thus removing the need for time con-
suming mechanical tuning.
4
fres > fafres < fa
fres
fa
S [mm]
f [Hz]
a
b
c
d

3.2 Regulated drive control
It is possible to operate a vibratory feeder at resonance if a frequency inverter is used for holding the feeder
at resonant frequency and the amplitude at a level determined by a selected set-point. To achieve this, the
vibratory movement has to be measured and fed back to the frequency controller. Normally a sensor is fitted
to the vibrating part of the feeder to obtain this measurement. The signal generated is used not only to hold
the feeder at resonant frequency but also to maintain constant vibration amplitude by varying the output volt-
age. The feeder is always running with the greatest effectiveness when operating in this manner.
For more information refer to section 9.0 Guidance on using regulation control with frequency inverters.
4.0 REOVIB – Symbols
The following icons are used to denote unit functions
Straight line vibratory feeder
Vibratory feeder with a spiral track
Motor driven pre-feeder
Vibratory pre-feeder
Belt pre-feeder
Track control (product line)
Sensor for level control
Solenoid valve, e.g. for air blast
Control input START / STOP
Control output ON / OFF
5
0
I
0
I
Linear feeder
Bowl feeder
Elevator
Track
Sensor
Sensor
Position
Solenoid
Enable input
On / Off
Status output
On / Off
Hopper feeder
M
Band feeder

5.0 REOVIB – Terms
Through the course of time, various terms that sometimes seems different but is really the same, relating to
equipment, functions and characteristics, have evolved. These have been compiled, below, together with
explanations. In instances where there are several terms relating to a theme, the most widely used expres-
sion is underlined.
Bowl feeder
Feed equipment fitted with a round bowl that has a spiral track inside;
components move upwards and outwards along the track and tooling is
fitted sort the components so that they leave the feeder correctly orientated.
Linear feeder
Track feeder/ In-Line
feeder
Feed equipment for conveying orientated components in a straight line
Pre-feeder
Bunker / Feeder
hopper
Large vibratory feeders (bulk storage), feed conveyors or slatted belt ele-
vators; used for topping-up bowl feeders, over a long period, without the
need for manual intervention.
Component
Product, Material
The material or work-piece that is fed by the vibratory feeder
Vibrating frequency
The mechanical frequency at which the feeder vibrates.
In the case of thyristor or triac controllers this is completely dependent on
the mains supply frequency. When both half waves of the mains cycle are
used this gives a frequency that is twice that of the mains supply. When a
half-wave only is used this provides a frequency the same as that of the
mains supply.
A frequency inverter can provide a frequency that is independent of the
mains supply frequency.
Vibrating speed
Refers to the derivative of deflection against time
Amplitude
Deflection
Deflection of the feeder [mm] relative to the static air-gap between the coil
and armature; normally expressed as the entire backward/forward (±)
movement.
Resonant frequency
A particular frequency at which a feeder vibrates with the minimum power
requirement. In theory resonance is defined as the frequency that gives in-
finite amplitude.
Off-resonance condi-
tion
A difference between the operating frequency and the resonant frequency
of a vibratory feeder
Over-critical opera-
tion
Running a feeder at a frequency that is higher than resonant frequency; the
amplitude becomes smaller as loading or damping increases.
Under-critical damp-
ing
Running a feeder at a frequency that is lower than resonant frequency; the
amplitude is not affected by product loading.
Air-gap
Static air gap
The space between the coil and armature when a feeder is at rest
Feeder power
Feeder speed /
Feeder throughput
A measurement of the amount of components fed over a time period
Full-wave control
6000 vibs / min
100 Hz operation
Both mains, sine wave, half-cycles are controlled. The vibrating frequency
is twice the mains frequency.
6000 vibrations / min at 50Hz mains frequency
7200 vibrations / min at 60 Hz mains frequency
6

Half-wave control
3000 vibs / min
50 Hz operation
Only one half of the mains sine wave is controlled. The vibrating frequency
is the same as the mains frequency.
3000 vibrations/ min at 50 Hz mains frequency
3600 vibrations/ min at 60 Hz mains frequency
Soft start
To prevent a sudden switch-on to full feeder throughput; a ramp-up time is
used instead.
Purpose: To reduce the likelihood of coil hammering and components being
thrown off the feed track
Soft stop
The feeder is ramped down when the feeder is switched off by using the
enable input or track control.
Purpose: To reduce product storage changes
Umax / Umin
A facility to adjust the maximum and minimum output voltage levels of the
control equipment; the set-point range can then be varied between these
limits.
Purpose: For adapting different feeders to work with a controller
Track control
A component sensor is used, in conjunction with the controller, to maintain
a semi-constant level (queue) of product around a fixed point (sensor posi-
tion
Purpose: To reduce the unnecessary running time of feed equipment and
deterioration of product finish
Component high/low
level control
Control of component storage, between two track sensors
Purpose: To reduce the unnecessary running time of feed equipment and
deterioration of product
ton / toff
On/off switching time-delays
Purpose: To adjust a feeders response to track sensor signals
Pre-feeder control
Replenishment of product i response to a level control sensor,e.g. fitted in a
bowl feeder. When the depth of components drops below set a certain
level, the pre-feeder switches on and “tops-up” the feed system.
Coarse/fine control
Operation with two feeder speeds:fast and slow
Pulsed operation
Feeder runs with a pulsing, on/off action,e.g. to separate components
Accelerometer or am-
plitude sensor
A sensor to control the actual amplitude of a vibratory feeder
Can be used either for monitoring or as a feedback transducer for amplitude
regulation.
Mill controller
Used with small capacity grinding mills, to ensure that a mill is fed with the
optimum throughput of material. The feeder is regulated in response to the
loading of the mill. The motor current is used to monitor to mill loading.
Motor current increases as a greater amount of material is fed and so the
feeder throughput is reduced. When the motor current drops the feeder
throughput is increased.
Material sensor
Component sensor
A sensor that determines if components are present or not at a particular
point
This sensor can be a light barrier, initiator or a switch.
PNP / NPN output
Depending on its construction, a sensor can give out a positive signal e.g.
+24V, or in the case of an open collector provides a ground return path.
When a positive signal is provided this is referred to as a PNP output. When
the output is switched to earth this is referred to as an NPN output.
Active/passive
photo-electric sensor
Active photoelectric sensors have an integrated switch amplifier and give a
definite output signal that is either PNP or NPN.
For passive photoelectric sensors there must be provision in the control unit
for a photo-receiver to be used.
Namur sensor
A sensor that reacts to the proximity of metallic materials with a resistance
change
2 wire system
7

6.0 Functions of control units
6.1 Enable input or Stop/Start input
An input for interlocking with a supervisory systemm e.g. PLC or several controllers together, with a specific
relationship, e.g. paddle-switch regulation of a pre-feeder from a bowl feeder (see status output).
Inputs are usually configured for use with contacts or a 24 VDC signal. The controller runs when the contacts
are closed or 24 VDC is applied.
6.2 Status output
A contact or 24 VDC output signal to indicate if a feeder is on or off. The signal can be used to regulate
preceding or subsequent controllers, e.g. pre-feeder.
6.3 Soft start
When a feeder is turned on, the sudden thrust can cause components to be displaced or in extreme cases it
can cause the coil to hammer. To prevent this happenings the output voltage can be gradually ramped up.
The ramp up time is normally adjustable. This protects the feeder by providing a “soft start“.
6.4 Soft stop
To reduce the disturbance of components or material (in precision applications) a feeder can be slowly
ramped down to a stop. The ramp time is normally adjustable.
6.5 Coarse/fine control
To reduce overfilling when feeding material to a weighing machine, e.g. packing machines, a feeder can be
fun slower, shortly before reaching the target weight. Additional contacts are provided in a weigher for this
purpose. These contacts switch the controller to a second set-point level, which reduces the feeder through-
put. Upon reaching the target weight, the feeder switches off completely. This operating mode can be
selected in REOVIB digital controllers, as an alternative to using track control. The second set-point for “fine
feed“ is adjusted through the control panel. The sensor socket is used for the input signal.
6.6 Air valve output
Sometimes it is necessary, with troublesome components, to provide an air blast that will transfer product
from one feeder to another (e.g. from a bowl to a linear feeder). In such instances the air is only required
whilst a feeder is running. This output is configured so that the valve switches on one second before the
feeder starts and switches off four seconds after it stops.
6.7 Pulsed operation
A pulsed component flow is required for some applications, e.g. components that tangle or nest.
In digital controllers there is a function available and this has independently adjustable On/Off time settings.
See example below:-
8
1 s
4 s
Valvel
Feeder
1 s
Feeder
1,5 s
On
Off

6.8 Track control
Material flow can be regulated by employing track control, whereby unnecessary feeder running time (de-
creasing noise and energy consumption) and degradation of the component can be reduced.
6.8.1 Single point control
A bowl feeder is controlled from a material sensor located along the component track.
The feeder is switched on and off in response to a sensor, which monitors the material level. Internal, adjust-
able timers “ton and toff“ are used to delay the switching, and so the material level rises and falls around the
position of the sensor on the feed track.
The power output from the controller is switched on after product falls below the sensor position and the
switch on time delay has expired (t2). When product builds up behind the sensor position (t4), and the switch
off time delay has expired (t5), the power output from the control unit switches off. The time delays are reset
if gaps in the product flow are detected. The delay is always timed, precisely, from detection of the first or
last component. The on/off time delays are set by using trimmers or a programming menu in display panel.
9
Feeder ON
Feeder OFF
on
off
Sensor
Output
Status
Time out
Output
Time out
t1
t2
t3
t4
t5
ton
toff
Sensor
t2
t5
t1 / t4

6.8.2 Min/Max Control
When two sensors are used for track control, the feeder is switched off when material builds up beyond the
“max“ sensor and the time delay has elapsed (t5). The feeder switches on again when the product level
drops below the “min“ sensor and the corresponding time delay has elapsed (t2). The adjustable time delays
determine, precisely, the quantity of components that can go beyond the sensor positions. The time delays
are reset if gaps in the product flow are detected. The delay is always timed, precisely, from detection of the
first or last component. The on/off time delays are set by using trimmers or a programming menu in display
panel.
6.8.3 Sensor Time-out
Additional function available in digital controllers when the sensor switches (t1) an additional timer ”Sensor-
Time-out“ is started. After a preset time (e.g. 30...240 sec.) the feeder is switched off (t3), providing that in
the meantime no further product has been detected by the sensor. The status signal is initiated,
simultaneously, and a flashing error message, ”Error“ ”SE“, is displayed. This function is optional and must
be selected in the track control menu, where ”E.E.“ = I is to activate.
See the track control time diagram
10
ton
toff
Sensor 2 (Min)
t2
t5
t6 / t4
Sensor 1 (Max)
t1
Feeder ON
Feeder OFF
t on
off
Sensor 2
MIN
Output
Status
Time out
Output
Time out
Sensor 1
MAX
t2
t1
t3
t4
t5
t6

7.0 Controls
7.1 Analogue Units
Potentiometers and link switches are used for adjusting throughput configuring analogue units to operate
with specific feeders. The functions and locations of the potentiometers and link switches are fully explained
in the operating instruction manual for the controller.
7.2 Digital units
Digital units are provided with a display and programming keys that are used for adjusting all parameters and
the feeder throughput. Because the same keys and display are used for all different settings, a strict setting
up procedure must be followed. Pass code protection of the parameter settings prevents tampering by un-
authorized personnel.
Factory settings can be recalled for setting up as from new or when a control unit is used with another
feeder, for instance. The factory settings are reinstated by selecting menu “C 210“(Parameter “FAC“). Under
the same menu it is possible to recall user settings that have been previously stored using Code
“C143“(Parameter “US.PA“).
Below is an explanation of the main setting components that are provided on controllers.
7.2.1 Three key control panel
The operation and setting up of the unit is achieved by using three keys in conjunction with an LED display
that can be found on the front panel. These controls are all that is needed for selecting all operating modes
and setting all parameters.
To prevent accidental or unauthorized adjustment the parameter settings are stored under user menus. A
pass code must be entered to open the menus. Different menu codes are provided for the various function
groups (refer to controller operating instructions).
LED-Display
Increase Decrease Enter
Pushing down the key for a short time causes the display to increase, or decrease, by one step (unit or
tenth). Depressing the key for a longer time causes the displayed value to step in ten units at a time.
Changed values are saved upon leaving the programming mode or if no keys are pressed for a pe-
riod of 60 seconds.
All setting routines are commenced by pressing the programming button “P“. The following diagram should
clarify the sequence in which keys are pressed:
11
P
P
PP
P
P
P P

1. Press the “P“ key
2. Select the code number with the cursor keys
3. Press the “P“ key. This displays the first menu point. The required menu point can be found by repeat-
edly pressing the “P“ key (scrolling).
4. The value in the menu point can be changed with the cursor keys.
5. Scroll to the next menu point or to the end of the menu, which returns the display to the set point value,
by pressing the “P“ key.
To exit the menu and return back to the normal display, quickly, depress the “P“ key for 5 seconds.
7.2.2 Reset set-point to zero
for units that do not have I/O keys on the front panel
When a setting has been left in an undesirable state, e.g. hammering of the coil could occur or too high a
current inrush, causing nuisance tripping, the set-point can be instantly reset to zero in the following manner:
Press the down cursor key whilst switching on the supply using the mains switch.
Using this procedure, after resetting to zero, the set-point can be increased again gradually or the frequency
setting can be changed, for instance.
7.2.3 Six key control panel
The six buttons and a LED display found in the
front panel are used for operating and setting up
the unit. All operating methods and adjustable
parameters can be set up through this panel.
The “I“ and “O“ buttons are used for switching the
unit ON and OFF, however, these do not pro-
vide mains isolation, they simply inhibit the
power semiconductors
The “P“, “F“ and “Cursor Buttons“ are used for
parameter adjustment. Parameters are set by
using menu controls which are called up by en-
tering operator codes. These are explained in
more detail in the section “setting up instructions“.
The display value can be increased or decreased
by units, or tenths of units, by a short press of the
cursor buttons. Holding the buttons down will
cause the display to change in units often.
To prevent accidental or unauthorized adjustment the parameter settings are stored under user menus. A
pass code must be entered to open the menus. Different menu codes are provided for the various function
groups (refer to controller operating instructions).
Changed values are saved upon leaving the programming mode or if no keys are pressed for a pe-
riod of 100 seconds.
12
I
0
P
F
ON
OFF
DISPLAY
PROGRAMMING
MODE / ENTER
UP
DOWN
BACK

All setting routines are commenced by pressing the programming button “P“. The following diagram should
clarify the sequence in which keys are pressed:
Example: To set feeder parameters
1. Press the “P“ key
2. Select the code number with the cursor keys
3. Press the “P“ key. This displays the first menu point. The required menu point can be found by repeat-
edly pressing the “P“ key (scrolling).
4. The value in the menu point can be changed with the cursor keys.
5. Scroll to the next menu point or to the end of the menu, which returns the display to the set-point value,
by pressing the “P“ key. To exit the menu and return back to the normal display, quickly, depress the “P“
key for 5 seconds.
6. The “F” key may be used to step back to the previous point within a menu.
8.0 General manufacturers’ instructions for the installation of REOVIB control units.
Electrical equipment must be installed by technically qualified personnel. Qualified personnel are persons
who, because of their training, experience and position as well as their knowledge of appropriate standards,
regulations, health and safety requirements and working conditions, are authorized to be responsible for the
safety of the equipment, at all times, whilst carrying out their normal duties and are therefore aware of, and
can report, possible hazards (Definition of qualified employees according to IEC 364).
The control unit and feed equipment should be checked, before installation, to ensure that they have been
selected for use under local conditions:
•Supply voltage
•Mains frequency
•Mechanical frequency of the feed system
•Power rating of the feed system
Safety warning
!! Beware: Remove mains plug before opening and when working inside the controller.
Graphic symbol
•Emergency stop devices must be provided for all applications. Operation of the emergency stop must
inhibit any further uncontrolled operation.
•Electrical connections must be covered
•The earth connection must be checked, for correct function, after installation.
13
Soft start time 0...5 sec.
Soft stop time 0...5 sec.
Running mode
P
P
P
P
P
P
P
P
P
P
P
P
Frequency [Hz]
Maximum limit 100...5 %
Feeder Speed 0...100 %
F
!

8.1 Before installation
•Read the instruction manual carefully, in certain circumstances there are additional instructions relevant
to the installation of a particular controller (special attention should be given to warnings).
•Isolate from the mains supply, i.e. do not plug into mains socket.
•Connect the control according to the connection diagram.
•Adjust set-point to zero and put the unit mains switch in the off position.
•Insert the plug into the mains supply socket.
•Switch the unit on.
•Enable the unit, if necessary, perhaps from a supervisory system.
•The feeder throughput can now be adjusted using the set-point potentiometer (display).
8.1.0 Connection diagram for frequency drives
8.1.1 Setting the mechanical vibrating frequency
It is essential to set the frequency of the coil current, correctly, otherwise there will be a loss of feeder
throughput or the coils will overheat. The vibrating frequency for thyristor or triac controllers, is selected by
using a switch (normally a link switch), depending on the type of controller. The programming menu is used
in digital controllers.
14
F
K
L1
REOVIB
MFS ....
L1
N
PE
N
PE
L1 PE
A1 A2
Line reactor
Recommended for reducing mains distortion
(PFC) and protecting the drive unit under harsh
operating conditions.
Reduces down time and Increases operating
life.
Transient suppression device
Recommended in industrial situations
where there are frequently-switching heavy
loads or there is a high predominance of
thunderstorms.
Fuses for short-
circuit protection
Isolator
Screened cable to the coil,
with the screen connected to
earth at both ends. Cable
must be run separately from
mains supply and signal
cables!
Screen bonded to chassis plate
with maximum contact area
Recommended bonding methods
for output cable screens
Screen terminal
(accessory)
Incorrect!
Screen from signal and
control cables
Magnet

For 100Hz (120Hz) vibrating frequency, this switch must be closed or a link fitted and for 50Hz (60Hz) vi-
brating frequency the switch must be open, or a link is removed.
In the case of frequency inverters the vibrating frequency has a step less setting through the operator front
panel.
Coils can be damaged if the vibrating frequency is set incorrectly (too low).
The rating label on a coil is often not very explicit, e.g. 50Hz is stated but no reference is made to whether
this is mains frequency or the vibrating frequency of the feeder (generally it refers to the electrical fre-
quency). It is important (in the case of thyristor and triac controllers) to know if the coil operates with one or
both of the mains half-waves (6000 or 3000vibs/min).
Coils for 50Hz (3000 vibs/min) are often designated with the additional wording “for rectifier opera-
tion”.
A coil for 6000 vibs/min installed to operate on half-wave (3000 vibs/min) will draw too high a current and will
inevitably overheat, leading to breakdown. The frequency adjustment range, on frequency controllers, is very
wide and so it is particularly important to monitor the coil current.
When in doubt the current must be checked.
8.2 Setting the feeder throughput
Different feeder constructions (size, weight, damping etc.) means that the set-point control range, i.e. they
has to be trimmed for each individual feeder. In other words, the output voltage value at which material just
moves and also which gives maximum deflection, differs from feeder to feeder. The trimmers Umin and
Umax are used for setting the control range, so that it can be fully used, whether this be for control from a set
point potentiometer, 0...10V control voltage or 0(4)...20mA current signal.
Controllers with digital control panels, because of their
improved setting abilities, do not require this facility. It is only
necessary to limit the maximum feeder throughput, to either
protect the coil against hammering or to limit a feeder that is
too quick (jamming or interlocking parts).
When an external, analogue, set-point signal is used in
conjunction with a digital controller, it is still necessary to
adjust the minimum value.
In this case the setting is as follows:
1. Increase the throughput setting to the level where the
feeder does not quite feed.
2. Now go into the user menu and select the external set
point source. The value set previously will remain as the
minimum level when the throughput signal is “0”.
9.0 Setting up regulation control of frequency controllers
•To use regulation mode it is necessary to fit an accelerometer to the vibratory feeder.
•When an accelerometer is used in regulation mode, it will sense and feed back all vibration signals.
Stray signals can be generated by neighbouring equipment, inadequate supporting structures for the
feed equipment or from inadequate mounting of the sensor itself. These can cause incorrect regulation.
It is especially important to ensure that there are no external influences on the feeder, when an
automatic frequency search is being carried out.
•Resonant frequency: Depending on the construction of the feeder and mass distribution, it is possible
to have several frequencies that will exhibit resonance. The additional resonance points are multiples of
the main resonant frequency. In certain, critical, circumstances the automatic frequency search may not
locate resonance for this reason and in such cases the frequency must be set manually.
15
010 20 30 40 50 60 70 80 90 100 [%]
10
20
30
40
50
60
70
80
90
100
[%]
Output voltage
Set point
Umin
Umax
Full scale

9.0.1 Set up menu for regulation control
E.g. REOVIB MFS 068
Example menu only: for other control units the parameters may be different!
The controller, together with the sensor fitted on the feeder produce a feedback loop, whereby the signal
generated from the sensor determines the control range of the set-point, i.e. the regulator controls the feeder
so that the effective value (feeder power or intensity of vibration) relates to the provided set-point value. Be-
cause the effective value is dependent on the feeder (frequency, acceleration and amplitude) and in addition
depends on the mounting position of the sensor, the regulator must be adapted to suit the output control
range.
This is achieved by using the parameter “P” in menu “C 008”. The measured sensor signal range is adjusted
by changing this value. In most instances a value of less than 100 must be entered, so that the set-point can
reach 100% or can go as high as possible.
When it is not possible to achieve an acceptable range the accelerometer should be mounted in the location
which gives the greatest movement (see the bowl feeder example).
The importance of scaling this value is demonstrated when, for example, a feeder takes a very long time to
ramp up, after it has been switched on.
9.1 Relationship between acceleration and amplitude
The sensor measures the momentary acceleration of the feeder. It generates a sinusoidal output voltage
signal. The acceleration gets higher as the frequency increases. The sensor signal is greater for a higher
frequency and lower amplitude than for a low frequency with higher amplitude.
Acceleration
In practice the acceleration is influenced by gravitational
force and the applied amplitude is measured in mm and so
this gives the following formula:
[ ] [ ] [ ] [ ] [ ]
497
10281,9
22
2
3
2
222 mmsHzf
mmsHzf
ga n
n=
⋅
=
π
a[g] = Acceleration ( with respect to gravitational accelera-
tion of 9.81 m/s2)
Sn[mm] = Applied amplitude
In practice where 497 is approximated to
500 this gives, for example:
1.
Vibrating frequency 50Hz, amplitude 3mm
or
2.
Vibrating frequency 33Hz,Amplitude 5mm
16
f πω 2=
sa 2 ω =
ga 15
500
350 2
=
≈
⋅
=
where
ga 89,10
500
5332
=
≈
⋅
=
P
P
P
P
P
P
P
Code 008
Regulation P characteristic
(Circuit gain)
Start freq. search
Automatic frequency control
A.F.C. = 0 = Off
A.F.C. = I = On
Regulation I characteristic
(damps oscillations of the feeder)
Return to normal running mode
P
P
Select regulation mode
ACC. = 0 = Control without sensor
ACC. = I = Regulation with sensor
Vib. frequency [Hz]
P
P

Using an accelerometer with an output signal of 0.3 V/g the sensor generates a peak voltage of 4.5V for a
peak acceleration of 15g (example 1), corresponding to a 3.18Vrms value.
Example 1: => 15g => 4.5 V => 3.18 Vrms
Example 2: => 11g => 3.3 V => 2.33 Vrms
There is a wide variation in the g force generated by different feeders and hence great differences in the
strength of feedback signal. The maximum setting [P] can be used to adjust the feedback signal to a realistic
level.
9.2 Setting up instructions for using a controller in regulation mode
Connect the control equipment
Fit the sensor onto the feed equipment and connect to the controller
9.3 Determine resonant frequency
9.3.1 Manual setting of the vibrating frequency
A very low throughput setting must be used when adjusting the output frequency because it is possible to
have very large deflection, with a very low voltage when passing through resonance. To determine reso-
nance an analogue, moving-iron, RMS ammeter should be connected to the power output cable. The reso-
nant frequency has been reached when the maximum amplitude is achieved with the minimum
current reading.
9.3.2 Automatic frequency search
•Set throughput to zero
•Switch on regulation mode (menu C 008, set Parameter ACC = I )
•By activating the frequency search (menu C 008, select Parameter “A.F.S“ and press a cursor key to
start search) this will determine the optimum feeder setting. When the resonant frequency has been
found the controller will complete the search routine and return to the previous throughput setting (0).
9.4. Optimizing regulation
9.4.1 Control range adjustment
•Set Parameter “P“ in menu C 096 to 50% (maximum limit)
•Increase the through put ”A“ from zero. With a sufficient feedback signal from the sensor, the feeder
amplitude can be gradually increased to 100%.
•If the maximum amplitude cannot be achieved with the 100% setting then further increase Parameter “P“
in menu C 008 and this will give more adjustment.
•Leave menu C 008. In normal running mode the throughput is displayed in %. If there is a horizontal bar
in the upper first segment of the display, then the feedback signal is too low. Return to Parameter “P“ in
menu C 008 and reduce this setting. If it is not possible to reduce this any further then the throughput
setting must be reduced until the bar goes out.
9.4.2 Optimizing the regulation circuit
when the feeder oscillates or has insufficient regulation response to load changes.
The response characteristics in the regulation circuit can be in menu C 008 using Parameter “P.A“ (Propor-
tional Characteristic) and “I.A“ (Integral Characteristic).
Feeder throughput oscillates.
Reduce Parameter “P.A.“ in menu C 008 until the oscillating ceases.
If possible reduce Parameter “I.A.“ to zero or the lowest possible value.
17

9.5 Diagnostic displays for non-optimized regulation settings
Controller has reached maximum output power.
The feedback signal from the sensor (accelerometer) is too weak relative to the
selected throughput setting.
Reduce Parameter “P“ in menu C 096 or C 008.
The feedback signal from the sensor (accelerometer) is too strong.
Alternating display:
The regulator oscillates rapidly.
Reduce Parameter “P.A“ in menu C 008.
10.0 Working frequency of the coil
With new applications the current should be monitored with a true RMS meter because it is possible to draw
a current that is too high for the coil, by changing the frequency, even by only a small amount.
The coil should be selected for the correct frequency, to prevent too high a current draw, resulting in over-
loading of the coil.
11.0 Measurement of output current and voltage
An effective measuring instrument that does not depend on a true sine wave for mains voltage or current,
should be used (a sine wave is only generated at full output with full wave control).
The output from frequency controllers is generated by an electronic inverter with pulse-width, modulated
switching. The voltage and current values cannot be measured with normal instruments. Preferably, a
moving-iron measuring instrument (analogue meter) should be used. An analogue meter is recommended
because electronic multi-meters, in this instance, will not measure reliably.
Recommended measuring equipment: REOVIB Measurement box 122
12.0 Accelerometer mounting
The accelerometer should generate signals for the movement and acceleration of the feeder, which are fed
back to the regulator circuit of the control unit. Therefore it is very important that the sensor picks up no other
extraneous vibration signals.
The sensor should be positioned so that it moves in
the same direction as the feeder, ideally in the same
plane as the springs, and it should be fitted on a solid
block that will not generate vibration signals.
18
SW SW