Lincoln Electric MOTOVAR MV 20 Mounting instructions

ELECTRONIC VARIABLE SPEED UNIT
MOTOVAR MV 20
SAFETY INSTRUCTIONS FOR USE AND MAINTENANCE
DEVICE N°W000139784
N°W000139834
N°W000140676
N°W000139910
N°W000237668
N°9109 7542
N°9109 7543
EDITION: EN Instructions for use REF: 8695-5832
REVISION: M
DATE: 06-2019 Original instructions

Thank for the trust you have expressed by purchasing this equipment, which
will give you full satisfaction if you follow its instructions for use and
maintenance.
Its design, component specifications and workmanship comply with
applicable European directives.
Please refer to the enclosed CE declaration to identify the directives
applicable to it.
The manufacturer will not be held responsible where items not recommended
by themselves are associated with this product.
For your safety,there follows a non-restrictive list of recommendations or
requirements, many of which appear in the employment code.
Finally we would ask you kindly to inform your supplier of any error which
you may find in this instruction manual.

8695 5832
MOTOVAR MV20 I
CONTENTS
A - IDENTIFICATION.........................................................................................................................1
B - SAFETY INSTRUCTIONS............................................................................................................3
C - DESCRIPTION .............................................................................................................................4
FLOW CHART OF THE VARIABLE SPEED UNIT..................................................................4
PRESENTATION......................................................................................................................5
SPECIFICATIONS OF MOTOVAR MV 20 ...............................................................................6
D - ASSEMBLY - INSTALLATION ....................................................................................................7
1 - CONNECTION....................................................................................................................7
2 - START UP...........................................................................................................................7
3 - ADJUSTMENTS AND CONFIGURATIONSOF THE VARIABLE SPEED UNIT....................8
E - MAINTENANCE............................................................................................................................11
1 - TROUBLESHOOTING........................................................................................................11
PERSONAL NOTES ..........................................................................................................................12

8695 5832
II MOTOVAR MV20
INFORMATIONS
DISPLAYS AND PRESSURE GAUGES
The measuring devices or displays for voltage, current, speed, pressure, etc., whether analog or digital, should
be considered as indicators
REVISIONS
REVISION J 07/08
DESIGNATION
PAGE
Creation in several languages
REVISION K 10/08
DESIGNATION
PAGE
Complete update + spareparts newoffer
-
REVISION L 05/18
DESIGNATION
PAGE
To change logos
REVISION M 06/19
DESIGNATION
PAGE
Update
D-7 ; D-8 ; D-9

8695 5832 / L
MOTOVAR MV20 A-1
A - IDENTIFICATION
Please enter the number of your equipment in the following box.
Quote this information in all correspondence.
N° .

A - IDENTIFICATION 8695 5832 / L
A-2 MOTOVAR MV20

8695 5832 / L
MOTOVAR MV20 B-3
B - SAFETY INSTRUCTIONS
For general safety instructions, please refer to the specific manual supplied with
the equipment.

8695 5832 / L
C-4 MOTOVAR MV20
C - DESCRIPTION
FLOW CHART OF THE VARIABLE SPEED UNIT
Tacho
Setpoint
Pulse width modulator
Power control
Power
Motor
Chort circuit control
Filtering +
levelling
V and I processing
Control of I limiting
V and I
measurement
Regulation
Rotation direction
control
Locking control
Measurement of
max I
Direction +
Direction -

8695 5832 / LC - DESCRIPTION
MOTOVAR MV20 C-5
PRESENTATION
The MOTOVAR MV 20 is a four-quadrant switching variable speed unit
with dimensions 220x100x50 ; it can deliver 500 W of power.
The variable speed unit is autonomous and is supplied by 42V 50/60 Hz
10A. An external fuse protection is to be provided for on the 42V power
supply.
The MOTOVAR MV 20 has two unlocking inputs :
- a (+) input allows at a given setpoint to turn in one direction
- the other input (-) allows to turn in the other direction.
If the setpoint varies from + 10V to - 10V, the motor will reverse its
direction of rotation at the 0V setpoint.
Two modes of regulation are available : regulation with or without tacho
generator.
This variable speed unit is protected against motor short-circuits and has
a thermal circuit breaker at 80°C.

C - DESCRIPTION 8695 5832
C-6 MOTOVAR MV20
SPECIFICATIONS OF MOTOVAR MV 20
CHARACTERISTICS :
- Connection by draw-out terminal block
(wire 2,5 2max.)
- Power supply =
42V 10% 50/60 Hz 10A
- Setpoint (differential input) :
10V 22 K
- Regulation with or without tacho
generator.
- Unlocking direction +
(closing 5 and 6 J1).
- Unlocking direction -
(closing 5 and 7 J1).
If the 2 inputs are activated simultaneously,
the + direction has priority.
- 4 quadrants, switching power
- Switching frequency =
12Khz
- Memorized protection against short
circuits
(indication by red led).
- Thermal protection = 80°C on the radiator.
- Operating temperature =
0 to 40°C
- Adjustable intensity limiting
(factory adjustment = 10A).
- If a power transistor is disconnected or
shorts-out, the motor stops.

8695 5832 / M
MOTOVAR MV20 D-7
D - ASSEMBLY - INSTALLATION
1 - CONNECTION
2 - START UP
WARNING
Regulation with tacho generator.
When the variable speed unit-motor assembly is switched on for the first time, the
latter may race, no control being possible. Switch off the 42V power supply then
check the following points :
- Short circuit in the tacho generator
- Faulty connection between the variable speed unit and the tacho generator,
- Tacho generator connected on the wrong side.
When the motor runs properly at a speed that is proportional to the setpoint voltage
but in the direction opposite to the one required, it is necessary to switch off the
current and to interchange the 2 wires of the motor as well as the 2 wires of the
tacho generator.
Regulation without tacho generator.
If the configuration staple (J3) is not properly positioned, the motor can race, no
control being then possible.
Immediately switch off the 42V power supply and put the staple (J3) in the other
position.

D - ASSEMBLY - INSTALLATION 8695 5832 / M
D-8 MOTOVAR MV20
3 - ADJUSTMENTS AND CONFIGURATIONS OF THE VARIABLE SPEED UNIT
CAUTION :
DO NOT CHANGE R7
(FACTORY ADJUSTMENT)
R81
Adjustment to obtain similar speed of the motor
whether in load or off load.
R53
Adjustment to obtain motor stop with a 0V setpoint.
R56
Adjustment to obtain the required speed with a 10V
setpoint.
R94
Adjustment to obtain the maximum required intensity.
This adjustment is made after having connected an
ammeter in series with the motor and the motor being
locked.
J3
Configuration according to the regulation mode, i.e.
with or without tacho generator.
WITH => « AVEC »
WITHOUT => « SANS »

8695 5832 / MD - ASSEMBLY - INSTALLATION
MOTOVAR MV20 D-9
ADJUSTING THE VARIABLE SPEED UNIT
a) Select the regulation mode with or without tacho generator using staple
J3.
With SANYO motors, the tacho generator must always be
selected.
The MOTOVAR MV 20 is factory adjusted. A control can be made using the
following procedure.
b) Adjustment of maximum speed.
The adjustment can be made by R56 with a 10V DC setpoint..
Motor SEM W000139784
1600 tr/mn without tacho
Motor A77 W000140676
5000 tr/mn without tacho
Motor PARVALUX W000139834
4000 tr/mn with tacho
Motor SANYO V730 W000139910
1200 tr/mn with tacho
Motor SANYO V404 W000237668
1600 tr/mn with tacho
Feed motor MEGATRAC 5 9109 7542
3000 tr/mn without tacho
Carriage motor MEGATRAC 5 9109 7543
3000 tr/mn without tacho
c) Offset adjustment
The trimmer R53 allows motor stop when the setpoint is at 0V.
d) Gain adjustment.
The trimmer R81 makes it possible to maintain the rotation speed of the motor
constant with the tacho generator mode not selected (±1%) when the load
varies from 0 to the selected maximum I.

D - ASSEMBLY - INSTALLATION 8695 5832 / M
D-10 MOTOVAR MV20
e) Adjustment of Intensity limiting
Connect an ammeter in series with the motor, lock the motor, and switch
on the variable speed unit.
Adjust the required intensity with R94 (factory adjustment 7A for A77
motor and 5,5A for SANYO motor V730, 1A for SANYO motor V404,
3.75A for MEGATRAC 5 feed motor, 2.5A for MEGATRAC 5 Carriage
motor).
Connect an ammeter in series with the motor, lock the motor, and switch
on the variable speed unit.
Adjust the required intensity with R94 (factory adjustment 7A for A77
motor and 5,5A for SANYO motor V730, 1A for SANYO V404).
According to motor type, the response curve can be adjusted by modifying
the values of C1 and R33.
Two outputs + 10V and - 10V are provided to supply the setpoint

8695 5832 / L
MOTOVAR MV20 E-11
E - MAINTENANCE
1 - TROUBLESHOOTING
SITUATION
REMEDIES
The motor does not run
(the red led D25 is off)
If the motor is OK,
- Check the power supply of the variable speed unit
- Check motor connections
- Check that the motor is not jammed
- Check that the setpoint is not at 0
- Check that the variable speed unit is unlocked
- Check that the temperature of the radiator is <70°C
Otherwise : Change the variable speed unit.
The motor does not run
(the red led D25 is lit on)
This indicates variable speed unit overload.
- Check the absence of short circuit.
- Check that the self of the motor is not too low.
- Check that the intensity limiting is not too high.
The motor races
- Check the connections of the tacho generator (see
first switching on).
The motor starts slowly
- Intensity limiting too low
- Load of the motor too high
- Check the setpoint
The motor does not reach the required
speed
- Variable speed unit has reached intensity limiting
- Check the setpoint

PERSONAL NOTES 8695 5832 / L
E-12 MOTOVAR MV20
PERSONAL NOTES
Lincoln Electric France S.A.S.
Avenue Franklin Roosevelt 76120 Le Grand Quevilly
76121 Le Grand Quevilly cedex
www.lincolnelectriceurope.com