NARGESA MC650 User manual

INSTRUCTIONS BOOK
PRADA NARGESA, S.L
Ctra. de Garrigàs a Sant Miquel s/n · 17476 Palau de Santa Eulàlia (Girona) SPAIN
Tel. [phone] · [email protected] · www.nargesa.com
SECTION BENDING MACHINE
MC650
NS: 2020-240

Thank you for choosing our machines
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INDEX
1. MACHINE DETAILS ................................................................................................................. 3
1.1. Machine identification details ........................................................................................ 3
1.2. Dimensions .................................................................................................................. 3
1.3. Description of the machine .......................................................................................... 3
1.4. Machine part identification .......................................................................................... 4
1.5. General characteristics .............................................................................................. 5
1.6. Description of the guards ............................................................................................. 6
2. TRANSPTRANSPORT AND STORAGE .................................................................................. 7
2.1. Transport ..................................................................................................................... 7
2.2. Storage conditions ........................................................................................................ 7
3. MAINTENANCE ........................................................................................................................ 8
3.1. Lubrication of moving parts ...................................................................................... 8
3.2. Lubrication of straigthener arms ……………………………………………………….…. 8
3.3. Hydraulic oil change ………………..……………...………………………………………. 9
3.4. Ckeckup of hydraulic instalation …………………..……………………………………… 10
4. INSTALLATION AND START UP ........................................................................................ 11
4.1. Positioning the machine .............................................................................................. 11
4.2. Dimensions and work area .................................................................................. 11
4.3. External permisible conditions ............................................................................... 11
4.4. Instructions for connecting to the power supply .......................................................... 12
5. INSTRUCTIONS FOR USE .................................................................................................. 16
5.1. Bending principles …................................................................................................... 16
5.2. Assembly of the rollers ............................................................................................... 16
5.3. Instruction manual ...................................................................................................... 17
5.3.1. Pilot lights …………………………..………………………………..……………. 18
5.3.2. Main buttons ………………….………………………………………………….. 18
5.3.3. Roller position controllers …………………………...………………………...… 19
5.3.4. Direction of rotation of rollers …………………………………………………. 19
5.4. Working position ……………...…………………………………………………………… 20
6. WARNINGS ............................................................................................................................. 22
6.1. Residual hazards ........................................................................................................ 22
6.2. Counter-productive methods ....................................................................................... 22
6.3. Other recommendations ............................................................................................. 22
7. ASSEMBLY OF THE ROLLERS ........................................................................................ 23
7.1. Bending capacity ......................................................................................................... 24
8. OPTIONAL ACCESSORIES ................................................................................................... 25
TECHNICAL ANNEX

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1. MACHINE DETAILS
1.1. Machine identification details
1.2. Dimensions
Picture 1. External dimensions of the MC650 bending machine
1.3. Description of the machine
The MC650 bending machine is a machine specifically designed for bending profiles, the majority of which
are metal, with different thicknesses and configurations, such as solid profiles, pipes, T-profiles, angles...
The bending machine offers a set of standard tools, rollers, to allow the bending of profiles in a range of
shapes and sizes.
Apart from the standard rollers, the manufacturer also offers different types of additional rollers to produce
other types of bending, according to the configuration of the material to be handled, as well as specific
rollers for work with stainless steel or aluminium, manufactured with * SUSTARIN for jobs in stainless steel
or aluminum avoiding the material to be damaged or scratched.
* Sustarín: Polyoxymethylene, high resistance and high rigid crystalline thermoplastic, low friction and excellent dimensional stability
PRADA NARGESA S.L. is not liable for any damage that might occur due to misuse
or failure by users to comply with the safety standards.
Trademark Nargesa
Type Section bending machine
Model MC650

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SECTION BENDING MACHINE MC650
1.4. Machine part identification
* Upper main roller
Straightener roller
* Lower main rollers
Straightener guide nut
Hydraulic cylinder
Control panel
* Bending rollers
Nuts to secure the position
of the straightener roller
Anti-rotation plate of the
straightener
Main switch
Connector
Anchoir point
for lifting
Anchor point for horizontal
position rotation
Hydraulic assembly
Oil level sight glass
Adjustment nut for
Back cover
of motor

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Figure 2. Nameplate
1.5. General characteristics
Hydraulic unit features
Motor power 3 Kw / 4 CV to 1400 r.p.m.
Intensity 12 / 7 A
Voltage supply 230/400 V 3 phased
Traction 3 rollers
Rollers speed 5 r.p.m.
Diameter of rollers 202 mm
Diameter of axis Lower 65 mm / Higher 80 mm
Useful axis length 160 mm
Structure material Sheet
Weight 1250 Kg
Dimensions 1300x990x1300 mm
Motor power 0.75 Kw/1 CV a 1400 r.p.m.
Intensity 3.5 / 2 A
Pump 1,5 l/min
Work pressure 200 bars

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SECTION BENDING MACHINE MC650
1.6. Description of the guards
The gear motor and all the gears that allow the operation of the machine are located under the main upper
cover that protects the mechanisms.
Although the major mobile elements are protected by the upper cover, it is necessary to take special
precautions during bending operations in order to avoid entrapment between the rollers and the piece
being bent.
Figure 3. Mechanism protection guards
Protection
drive unit
Frontal
protection

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2. TRANSPORT AND STORAGE
2.1. Transport
There are two ways of carrying out the transportation of the machine:
- From the bottom, through the base of the machine, using a pallet jack or forklift as shown in the illustra-
tion. Never raise the machine more than 200 mm from the surface in order to prevent the risk of tipping
- From the top of the machine, from the anchor point designed for this purpose defined in figure 4, using a
crane or forklift.
Figure 4. Transportation of the machine
2.2. Storage Conditions
The bending machine shouldn’t be stored in a place that does not meet the following requirements:
- Humidity between 30% and 95%
- Temperature of -25 °C to 55 °C or 75 °C for periods not exceeding 24hrs
(remember that these temperatures are in storage conditions)
- Machines or heavy objects should not be stacked on top
Anchoir point for lifting

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SECTION BENDING MACHINE MC650
CAUTION: The "Emergency Stop" push button must be pressed and the machine brought to a stop in
order to lubricate the machine”.
3. MAINTENANCE
3.1. Lubrication of moving parts
It is advisable to keep clean the machine moving parts, whenever posible, in order to ensure a correct per-
formance and thus make its useful life longer.
In order to lubricate the moving parts of the machine that require lubrication, it’s recommended to follow the
next instructions:
- Clean the surface to be lubricated with a cotton cloth or a soft rag that does not release any threads. To
remove the accumulated grease and any possible residues that have become stuck to it.
- After cleaning, reapply grease onto the surface with the help of a rag or a spatula.
- Spread the grease evenly without creating excesses or clumps.
- Lubricate the machine regularly, according to use.
* It is recommended to use lithium grease for the rollers N.850 EP-2.
3.2. Lubrication of straigthener arms.
In order to carry out the lubrication of the straigtheners:
1. we’ll place the rollers at the lowest position of the guide..
2. Then we clean and lubricate the guide.
Lubrication of the strraigthener guide.

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3. We’ll put the roller up and lubricate its axis
4. We repeat three times the operation of moving the roller up and down so the grease can be properly
distributed along the surface.
Lubrication of the roller axis
5. We clean and lubricate the rear guide and place it in its máximum front point.
6. We move the guide frontwards and backwards so the grease is properly distribute along the surface.
Engrase de la guía trasera
3.3. Hydraulic oil change
To replace the hydraulic oil, we recommend to follow the steps below:
- Check the oil level in the tank every 500 hours of use, checkup the oil level in the hydraulic tank located in
the base inner side. In order to have a correct information about the oil level, the inner lower rollers must be
in their lowest position.
- The oil cap is located at the top of the tank. If it is necessary to add oil, fill to the level of the sight glass
at the front of the tank.
- Change the hydraulic oil in the tank every 2000 hours of work or every 5 years.
- Remove the old oil in a tray and dispose of it at the nearest recycling point.

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SECTION BENDING MACHINE MC650
- Fill the tank with new hydraulic oil to the level of the sight glass located at the front. The capacity of the
tank is approximately 13 litres.
- Return the hydraulic assembly to its location and secure it to the machine with the
bolts.
* We recommend the use of CEPSA HIDRÁULICO HM 68 hydraulic oil.
Identification of the components of the hydraulic set.
3.4. Checkup of hydraulic installation
Every 6 months we should make sure there is no arising oil leak in the hoses of the hydraulic circuit.
Hoses of hydraulic circuit.
Refilling cap
Hydraulic tank
Oil level peephole

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4. INSTALLATION AND START UP
4.1. Positioning the machine
Locate the machine properly in order to avoid moving it; otherwise, follow the guidelines described in the
paragraph transport (no. 2). Must be placed on a flat, level surface to prevent it vibrating and moving during
bending operations.
It is optional to fix the machine by the four bolts since it is provided with a lower base or stand with four per-
forations as it’s shown in Figure 5.
Figure 5. Anchor points of the machine
4.2. Dimensions and work area
The dimensions must be considered when the machine is being placed, the working area for the operator
and the possible lengths of the parts to be worked.
The bending machine can be used by a single operator, who must be directly in the front of the machine to
be able to handle the piece being bend with safety, and never on the side.
Prior to commencing the bending operation, with the machine shut down, the operator must adjust the
Figure 6. Operator's working area
4.3. External permissible conditions
It is advisable to work under the following atmospheric conditions:
- Room temperature between +5 °C and +40 ºC without exceeding an average temperature of +35 °C
within 24 hrs.
- Humidity between 30% and 90% without water condensation.

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SECTION BENDING MACHINE MC650
IMPORTANT: This machine must be connected to an electrical outlet with earthing contact.
4.4 Instructions for connecting to the power supply
The MC650 bending machine has a three-phase 230V/400V, 3 Kw motor to move the rollers and a three –
phase 230V/400V, 0.75 Kw motor to govern the hydraulic piston, both prepared to connect to a 400V
power supply. The machine must be connected through the the installed connector to a compatible power
supply complying with the specified requirements.
If you wish to connect the machine to 230V three-phase, it is necessary to carry out some modification in
the electric panel, which are:
- Change the main motor coil connection
- Change the hydraulic motor coil connection
- Adjustment of intensity range of motor keeper at the hydraulic.
- Change of motor keeper at the main engine.
Changing the motor connection:
When the power supply is 400 V three-phase, connect in Star form (as preinstalled at the factory).
If the power supply is 230 V three-phase, proceed to connect in Triangle form. As indicated in the
illustration.
The connections are modified in the motor connection box, located inside the machine, changing the
configuration of the plates according to the mains voltage.
Figure 7. Change of engine connections
Triangle figure
For voltage 230V
Star figure
(Default)
For voltage 400V
Before making any changes to the wiring of the motor bobbins or electrical panel, it is essential
to check that the machine is not connected to any power source.

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Changing the hydraulic motor connection:
The motor of the hydraulic system is located inside the cabinet, at the bottom of the machine.
The hydraulic assembly is inside the cabinet. The motor is secured to the tank and on its front is the
connection box.
The same as the main motor, when the mains voltage is 400 V three-phase, proceed to connect in Star
form (as preinstalled at the factory). If the power supply is 230 V three-phase, proceed to connect in
triangular form. As indicated in the illustration.
It is necessary to change the configuration of the plates according to the voltage, as was done with the
main motor.
Figure 8. Changing the hydraulic engine connections
Triangle figure
For voltage 230V
Star figure
(Default)
For voltage 400V

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SECTION BENDING MACHINE MC650
Adjust the range of intensities of the motor guard contactors:
Depending on the power voltage, the working intensity also varies, and it is therefore necessary to also
modify the working range of the motor protection devices. The motor guard contactors are secured to the
electrical panel as shown in section A3. Electrical Box
The motor guard contactor have a structure like the ones shown in the diagram below and allow a rapid
adjustment through the regulator located at their front.
The right-hand contactor is responsible for protecting the main motor:
The regulator indication arrow must be around “5A” for 230V three-phase connection. In the case of a 400V
three-phase connection, this must be around “2.6A”.
The left-hand contactor is responsible for protecting the hydraulic motor:
The regulator indication arrow must be around “3.5A” for 230V three-phase connection. In the case of a
400V three-phase connection, this must be around “2A” .
*If the motor guard contactor cannot assume the intensity range required, this must be replaced with one
with a greater range.
Figure 9. Intensity range adjustment
We recommend contacting the Technical Service Department of NARGESA S.L.
if you wish to change the operation voltage of the machine in order to be guided and assisted
through the procedure.

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Triangle figure
For voltage 230V
Triangle figure
For voltage 230V
The MC650 bending machine comes equipped with a 230V/ 400V 3Kw three-phase motor for the operation
of the rollers and a 230V/ 400V 0.75 Kw three-phase motor to regulate the hydraulic piston, both ready to
be connected to a 1 phase 230V power supply. The machine must be connected with the plug installed to a
compatible power supply that meets the requirements specified.
Figure 10. Engine connections
The hydraulic system motor is located in the inside of the cabinet, at the base of the machine.
The hydraulic group is located inside the cabinet, with the motor secured to the tank and the terminal box
located at the front of the machine.
Figure 11. Changing the hydraulic engine connections

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SECTION BENDING MACHINE MC650
5. INSTRUCTIONS FOR USE
5.1. Bending principles
- The motor of the bending machine is controlled from the control panel.
- The radius of the curve is controlled by acting on the push buttons on the control panel, adjusting the
height of the two lower rollers.
- There is an emergency button on the panel.
- You can insert the material into the machine from either side. Use the position buttons to adjust the height
of the lower rollers and thus adjust admission of the material. By means of the limit switches, we can posi-
tion the final point of the lower rollers, separately, enabling you to obtain great position repeatability.
- To adjust the alignment of the material, it is necessary to modify the distance between the straighteners and
the work surface. This is done by acting on the nuts located at the back of the machine. These straighteners
guide the material so as to minimise lateral deformation. (The rollers of the straightener must press gently
against the section to be curved)
- In the event of not obtaining the proper results, the position of the guide rollers for deformation must be
adjusted.
- The roller mounting nuts must be tightened by manual force only .
5.2. Assembly of the rollers
Figure 12. Position of the rollers in relation to the machine axes

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5.3. Instruction manual
To control the operation of the MC650 hydraulic bending machine, there is a control desk from which
the machine can be controlled in a simple and intuitive manner.
9
411 123
10 6
7
55
1. Emergency stop
2. Of/On
3. Reset
4. Right roller position controllers
5. Selector
6. Roller position indicator
7. Potentiometer
8. Direction of rotation of rollers
9. Pilot lights
10. Roller position indicator
11. Left roller position controller
788

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SECTION BENDING MACHINE MC650
Nevertheless, to know the function of each of the elements of the control desk, it is recommended to read
the following sections:
5.3.1. Pilot lights
The control panel has three pilot lights, the function of each of which is explained below.
• White pilot light: Lights up when the main switch is in position 1 (ON), and informs that the bending
machine is powered. It is off when the main switch is in 0 position (OFF).
• Green pilot light: Is only on when the machine is powered and the reset button has been pressed. In
this case, the green pilot light comes on when the On button is pressed and it serves to indicates that the
bending machine is on and ready to work. It is off when the stop button or the emergency button has been
pressed, indicating that the machine is not in operation, even if it does have power.
• Red pilot light: Will only light up if the machine has mains power. In this case, the red pilot light
will come on when the emergency stop button is pressed, and it is used to indicate that there has been
an emergency stop. It will go off when the emergency stop lock has been released and the reset button
has been pressed.
5.3.2. Main buttons
To start and stop the bending machine, as well as to reset it, and carry out an emergency stop, the
control desk has the following buttons.
• On / Off switch: Integrating both switches in the same element, at the lower central part of the front of
the control desk, The On / Off control has two buttons, One red with an "O" symbol (Off button), and the
other green with the "I" symbol (On button). Therefore, they will turn on the machine if it is off and turn off
the machine if it is on respectively.
• Reset button: This blue button, located on the right of the on / off control, is used to reset the machine.
The machine must be reset whenever the machine is powered up and after an emergency stop.
• Emergency stop button: If there is a situation of danger during the use of the bending machine, before
anyone is injured, it is necessary to press the emergency stop button. Once the dangerous situation has
been dealt with, it is necessary to unlock the emergency stop button and then reset the machine to
continue working with it.

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5.3.3. Roller position controllers
To control each of the pistons producing upward and downward movement of the left and right hand
rollers, the control desk has two different areas, one at each side of the front of the control desk.
Obviously, as they carry out identical functions regarding the control of each of the pistons, we will explain
the operation generically, without specifying which piston is being referred to, to make it more
comprehensible.
• Position indicator: The position indicator is formed by a collection of 7-segment displays, informing both of
the current position of the piston in question, and the maximum position limit value of the piston in
question. Obviously, these two parameters, although they are displayed on the same indicator, cannot be
shown simultaneously. To select the information you wish to see on the display, use the selector. In
one position it will display the current position of the piston being controlled and in the other, the
maximum position limit value of the piston in question. In addition, the position indicator has three LED
lights. The upper (when on) indicates that the piston still has upward travel to reach the limit (configured
by the user with a potentiometer). The central LED is a voltage indicator, and will always remain on while
the machine has voltage. Finally, the lower LED (when on) indicates that the piston still has downward
travel to reach the minimum limit (established electronically).
• Selector: As commented above, the selector is used to switch between the information displayed on the
position indicator of the piston being controlled. In one of its two positions, it enables the viewing of the
current position of the piston, while in the other it offers the maximum position limit of the piston in
question.
• Raise button: Makes the piston in question move upwards while being pressed, until it reaches the
maximum position limit.
• Lower button: Makes the piston in question move downwards while being pressed, until it reaches the
minimum position limit.
• Adjustment potentiometer for the maximum limit: Used to adjust the maximum limit position to be
reached by the piston.
5.3.4. Direction of rotation of rollers
On the front of the control panel, in addition to the aforementioned controls, you can also find two buttons
to control the direction of rotation of the rollers. To do this, just press and maintain pressed the button
corresponding to the desired direction, left or right.