Cloudray Myjg-40 User manual

Power Supply MYJG-40 User Manual

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First of all, thanks a lot for you to choose our laser power supply products. To make good

use of our product, please read this manual carefully in advance. Model of this product is

MYJG-40 NW

40W Power Supply for CO2Laser Tubes

Model: MYJG-40 NW

I. Main Features

1. Good Compatibility: It can be applicable to 40W laser tubes manufactured by

different factories.

2. High Performance: Fast response, Good engraving effect, it can prolong the service

life of laser tube significantly.

3. Open Circuit Protection Function: When the earth connection is under good

situation, power can be short time work in open state. It can avoid the laser tube burst

damage caused by laser power supply, prolong the laser tube's service life.

4. Test Mode: One button to test the output laser manually(50% Max Power).

5. Application: Sculpture and cut acrylic, fabric, double color sheet, rubber etc.

II. Specification

Input

Input Voltage AC220V or AC110V (Switch Control)

AC Frequency 47-440HZ

Max Input Power 250W

Max Input Current 5A

Output Maximum Output Voltage DC 23KV

Maximum Output Current DC 20mA

Efficiency ≥90%(Full Load)

Mean Time Between

Failure (MTBF) ≥10000H

Response Speed ≤1ms（From the switch signal is given to the output current up to 90% of the

setting current）

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Power Supply MYJG-40 User Manual

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Withstand Voltage Input-Output, Input-Enclosure: AC1500V 10mA 60S; Output (negative pole) is

connected with machine Enclosure.

Weight 1.3kg

Environment Working Temperature：(-10~40℃), Relative Humidity (RH)≤90%

Cooling Way Force-Air Cooling (FAC)

III. Operation Instruction

1. Laser Tube Connection: (Referring to Power Supply and Laser Device's Connection

Diagram)

High voltage terminal (HV+) of MYJG-40NW power supply should be connected to the

positive pole of CO2 laser device. Current circuit of the power supply shall be connected

to negative pole (laser output terminal) of laser device, through an ampere meter or

directly.

2. Connection of Control Signal

The control signal shall be reliably connected to control terminal of the power supply

MYJG-40 NW, after connecting the DAC output signal and TTL signal of external

computer with the power supply, the laser device shall work as expected. If the laser lamp

can not work properly, should check the control signal is correct or not(include check the

voltage specification and logic), if use PWM control as power control, make sure f≥20KHz,

amplitude (peak value) ≤5V, Check and make sure protection switch WP connection is

correct at same time.

3. Voltage of Power Input:

MYJG-40W's power input of the power supply shall be 220VAC/50Hz. This power

supply can be adjusted for 110V or 220V.

4. Others:

A group of protection switches are also reserved for detection of water switch, fan

switch, open-enclosure protection and so on.

Caution:

1) Water cooling system should be working properly when switching on laser device.

2) Circuit of high voltage output should not be open! [High voltage output terminals

(positive and negative poles) shall be properly connected to positive and negative

poles of laser device, respectively.]

3) Attentions should be given to avoid any electric shock after the power supply being

switched off. (The Insulation Safety Requirements should be 40KV between the

terminal of output and "G")

4) Well-grounded three-pole receptacle should be used to the supply power. The

enclosure should be well grounded to avoid electric shock.

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Power Supply MYJG-40 User Manual

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IV. The Instruction of Power Supply and Laser Wiring Diagram and

Terminal

Terminal Definition as follows：

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Power Supply MYJG-40 User Manual

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Caution :

WP G

Figure 1 Figure 2

1) WP input terminal can use water switch or fan switch's test terminal, please pay

attention that WP is through optocoupler connected with ground (G) as (figure2), not as

(figure 1).

2) PWM Control: Requirements of the PWM frequency f ≥20 kHz, amplitude (peak value)

≤ 5V

Function of Control Interface:

TH TL WP IN Laser Output

unconnected

Low(≤0.3V)

0－5V or PWM Output laser

Power: Pmin~Pmax

Low(≤0.3V) unconnected Output about 40% laser

High(≥3V) Any value (ok) No laser

High(≥3V)

Unconnected

0－5 or PWM Output laser, Pmin~Pmax

Low(≤0.3V) Unconnected Output about 40% laser

Low(≤0.3V) Any value (ok) No laser

Any value (ok) Any value (ok) High(≥3V) No laser

VI. The connection of power supply and control board

1.Recommended connection: High-level light control

TH TL WP G IN 5V

手动出光

High-level light control "G"

Control Board

Water Detection

Manual laser operating

FG (Power supply

and enclosure of

laser machine)

Computer system

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Power Supply MYJG-40 User Manual

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2. Recommended connection: Low-level light control

TH TL WP G IN 5V

0~5V

VII. Check the power supply worked properly or not manually

Make sure the power supply and laser tube wiring correct. Unplug the control pins

and then press the ”TEST” button to test laser tube fire or not. The power supply and laser

tube can be judged working properly via this method.

VIII. Common Fault Detection and Ruled Out

Problem Cause Estimation Solution

Trip After

Power On

1. External Wiring:

AC and FG reverse

connection

Check if AC and FC

misplaced

Connected correctly

according to

Instruction

2. External Wiring:

Short circuit

between AC and AC

Use multimeter to check if

short circuit between AC

and AC.

Rewiring, and avoid

short circuit

3. Internal Wiring:

Short circuit

between AC and AC

or AC and FG

Send back factory for

maintenance

4. Other Causes

AC Power

On but Fan

of Power

1. Fan socket is

loose.

Laser emission when

manual test.

Open enclosure and

tighten socket.

2. Fan damaged

Laser emission when

manual test.

Change fan or send

back factory for

maintenance

Low-level light control G laser power control

Control Board

Output interface of

water detection

0~5V analog signal or

5V amplitude PWM

signal (f ≥20KHz)

Manual laser operating

Computer System

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Power Supply MYJG-40 User Manual

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Supply Does

not work

3. Fuse is burned.

No laser emission when

manual test.

Contact with us for

repair.

AC power on

but no laser

emission

1. Control wire

connected wrong

Check if wire is connected

correctly according to

Operation Instruction

Rewiring correctly

2. Internal

connector is loose.

Open outside case and

check Tighten connector.

3. Protection switch

on but on water

through or water

through switch is

broken.

Voltage>0.5V between

“WP”and”G”

Water through or

change water

through switch.

4. Wrong output

laser signal

Voltage between”TH ”

and “G” should<3V when

When laser-open

controlled by high level Replace CNC card or

change GND.

Voltage between"TL" and

“G” should>3V when

laser-open controlled by

low level.

5. Power control

signal is 0.

Voltage between “IN”and

“G” is 0.

Increase voltage

between “IN”and “G”.

6. Fuse is burned.

Fan does not work Send back factory for

maintenance

7. Others

Send back factory for

maintenance

Laser

emission at

all times

1.When “TL” control

laser: short circuit

between”TL ”and

“G”.

Voltage between”TL ”

and “G” =0

disconnected

between”TL ”and

“G”.

2. Circuit is broken. Send back factory for

maintenance

3. Switch of manual

test laser emission is

broken.

Change switch of

manual test laser

emission.

4. Other causes. Send back factory for

maintenance

Current is

not

increased

1. AC voltage is too

low

Output current is always at

5mA around.

Use AC voltage

regulator.

Send back factory for

maintenance

2. Power supply

and laser Device is

not connected very

well

3. Power control

signal from CNC

card is not

connected very well

with “IN”.

Output current is always at

10mA around. Re-connected

3. Potentiometer of

power is broken.

Output current is not

stable.

Change

potentiometer.

4. PWM frequency

or amplitude is not

suitable.

Change PWM

frequency or

amplitude.

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Power Supply MYJG-40 User Manual

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5. Internal

Transformer is

broken. Output current is always at

5mA around Send back factory for

maintenance

6. One circuit does

not work.

7. Others

Laser head

is not stable

during

working.

GND is not

connected well.

Connect earth wire of

CNC card,enclosure

of power supply, with

enclosure of laser

machine.

Laser

emission is

not stable

during

working.

When two

laser head

works, action

abnormal.

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