laser cutting machine practice

To ensure reliable operation of laser cutting machine, extend equipment life, improve the quality of processed products, should strictly abide by the rules.
A laser cutting machine operating procedures
1, open the power supply switch, the output voltage is switched to the regulator mode, you can not use electricity.
2, turn on the machine power switch (□ ON).
3, connected to the machine control power supply (key switch).
4, until the system self-test is complete, the machine axes referenced.
5, start the chiller, check the temperature, pressure (normal pressure is 5bar).
The chiller power for 3 minutes, the compressor starts, the fan rotates and starts refrigeration cooling.
Note: Chiller heat sink to be cleaned regularly to avoid excessive dust affect work, distilled water tank replaced every four months, do not use tap water or purified water.
6, open the nitrogen bottle, oxygen bottle, check the cylinder pressure, start air compressor, cold and dry.
Note: air compressor, cold and dry filter must be drained every morning, outside the optical path of the lens side before blowing a filter must be checked at any time, without water or oil, or contaminated lenses. The need to improve the gas supply, so that compliance.
7, to be reduced to a set temperature chillers (set at 21 degrees), and then turn on the laser total power, open the low-pressure (white button).
8, when the laser panel appears the word “HV READY” when the high pressure.
9, when the laser operation panel appear the words “HV START”, the laser light is red, the upper right corner of CNC system previously displayed “LASER H-VOLTAGE NOT READY” alarm disappeared, indicating that high pressure is normal, the laser enters the standby state.
10, before cutting to confirm the material type, material thickness, material size.
Note: Check all the cutting head is very correct, cutting non-metallic materials must contact cutting head (plus non-metallic detection rings).
11, adjustment plate, so that the edge of the machine parallel to the X and Y axes and to avoid cutting head outside the working range of the plate.
12, the Z axis to cut from the starting point, the simulation program to be executed to ensure that does not appear to exceed the soft limit alerts, enter edit mode, adjust the power, speed, punching time depending on the material type and thickness.
13, to cutting carbon steel plate, choose oxygen in manual mode, adjust the barometer to cut the desired pressure value. Then check the focus position, the coaxial checking procedures to ensure that the laser beam passes through the nozzle center, Z axis servo to the plate surface, adjust the nozzle from the board to determine the distance (adjustment potentiometer control box).
14, to be above the normal, in order to switch to the execution state, cutting the workpiece.
15, where there is the process of cutting dross, slag, or other abnormal conditions return, should be suspended immediately, identify the cause, the problem is solved and then continue cutting in order to avoid damage to the device.
16, the work is completed, shut down in the following order:
1) The Commissioner laser hypertension.
2) In the laser panel is closed low pressure.
3) Disconnect the laser power supply.
4) off the chiller.
5) Disconnect the machine control power supply (key switch), disconnect the machine power switch (OFF).
6) off cold and dry.
7) off the air compressor.
8) Turn off the nitrogen and oxygen valves.
17, disconnect the power supply.

Two CNC laser cutting machine safety operation (PRC laser)
1, should be checked before starting the gathering mirror, the mirror is clean, lasers, machine tools, pneumatic, water is smooth, leaks.
2, connected to the main power tools, power chillers, air compressors and dust blower power.
3, open the laser working gas CO2, N2, He and auxiliary gas O2 cylinder valve.
4, open the cold press, cold and dry.
5, the pressure of each gas is adjusted to an appropriate value.
6, connected to the machine control power supply, laser power (note open order).
7, start laser
Closing the “laser start” switch, vacuum pump → turbines work on the machine control panel (in this case the laser cavity system pressure is maintained at 100Torr, water flow should be maintained at 13 gallons / minute, laser lighting panels work light sequence Vacuum Pump On → Compressor On → until the laser panel appears “Hold”).
8, the light
“Power Conditioning” Turn the knob counterclockwise to the minimum, ON “high pressure start” switch and “electronic shutter” open light on the machine control panel. At this work lights “high start” lights, lasers into the cold start state, about 5 minutes to start the end of the cold laser, the laser into the normal state → “lasers normal” lights.
9, before using the laser beam and the nozzle inspection coaxial circumstances to protect the gathering mirror; adjusting the focus level according to the thickness of the sheet; adjust the “pulse frequency” in the form of “up time” and “duty cycle.”
10, start-up and use, note the following:
1) In the open shutter, in addition to the workpiece to be machined, the people and other objects should not be within the scope of the laser irradiation.
2) Do not leave the operator during operation.
3) Once the abnormal findings, immediately press the emergency stop switch.
4) Always check the cooling water temperature, flow and working gas pressure.
11, at the end, turn off the machine in the following order:
1) counterclockwise rotation adjustment function “power adjustment” knob to the minimum.
2) Turn off the “electronic shutter” switch.
3) Close the “high pressure start” switch.
4) Close the “laser start” switch.
5) the turbine stopped running open “Manual Backfill” button laser board.
Manual Backfill light red → Manual Backfill lights go out, backfilled end.
6) Turn off the laser power.
7) Turn off the machine power.
8) Turn off the power chillers, air compressor and refrigeration dryer power switch.
9) off the laser working gas CO2, N2, He, auxiliary gas O2.
10) Turn off the air compressor and refrigeration dryer.
11) clean site preparation and CNC machine tools.
Three bus safety rules
1. Check
1) Make sure the threaded connection between each original and reliable.
2) Make sure the system cylinder valve, globe valve (the valve hand wheel clockwise close, counterclockwise open), a pressure reducer are closed (regulator handle counterclockwise unscrewed).
2, open
1) followed by slowly open the cylinder valve on all cylinders, open all of the high-pressure valve. Confirm primary and secondary pressure relief valve in the closed
Closed state
2) adjusting the level of the left and right sides of the regulator output pressure P1, P2, so that P1 is greater than P2 0.05-0.1Mpa, such a system is to supply the left. Adjust the output pressure of the secondary pressure reducer P within 0.4Mpa range (that is, the system output pressure P, P2 is about 1.0-1.5Mpa)
3) When the left side of the exhaust gas cylinder, regulator output pressure on the left side becomes smaller, the system will automatically switch, turn the right side of bottled gas. In this case, the right of the output pressure adjusted to P1, in the replacement of the cylinder on the left side, the left side of the reduced output pressure adjusted to P2. The system can continuously supply. Although the primary regulator output pressure changes as the left and right sides of the cylinder will be continuously adjusted to, but because there is a secondary regulator for secondary pressure, the output pressure of the system remain the same, always P.
3, the replacement of cylinders
1) wear clean gloves, beware of grease, and other debris into the pipe pollution.
2) Turn off the side of the cylinder valve and cylinder valve.
3) Release the metal hose and cylinder valves threaded connections.
4) slightly open a new bottle of cylinders, cylinder valve mouth blowing dust, and then closes.
5) The high-pressure metal hose and cylinder connection, make sure that threaded connections are tight, secure.
6) Open the bottle valve, globe valve, standby, ready to take over the other side of the gas supply.

Four laser cutting machine specification
1. Laser
1) Make sure the laser power from the power supply of “regulated output” unavailable “mains” output.
2) ensure the quality of the laser gas.
3) When changing cylinders, first clean the lip, and then open the gas to blow off the debris inside the bottle mouth.
4) In order to ensure the cleanliness of CP lasers and laser PRC front window to replace ordinary compressed nitrogen as a protective gas. The use of high purity nitrogen (99.999%) as a protective gas ROFIN laser.
5) ensure that the cooling system is reliable and stable operation, the temperature, pressure, flow to meet the requirements of the laser, so as to ensure reliable and stable operation of the laser.
6) prohibits the operation of laser openings, to ensure safety.
7) is a laser built a small room, and the outside world, to ensure that dust, indoor installation of air conditioning, cooling and dehumidification, the ambient temperature and humidity to ensure that the four seasons below the dew point
8) open access lasers, ensure high-voltage power supply is disconnected and locked. Before contact charging device, make sure that the high pressure on the ground discharged.
9) According to the state of the laser gas consumption is set to increase gas consumption, can improve the laser quality, but increases operating costs.
10) regular observation of the cooling water flow, temperature and pressure, water temperature, laser discharge current, turbine sound.
11) regularly examine the laser.
2. Water-cooled machines
1) Make sure that the water-cooled machine stable power supply, phase sequence is correct.
2) Make sure the top of the water-cooled engine cooling fan unobstructed.
3) water-cooled machine outside temperature ≥5 ℃.
4) Daily clean up the dust on the heat sink.
5) ensure that the cooling water components meet the requirements.
6) Note that the water temperature is set with the laser, respectively.
7) weekly check the water level, water quality, pipeline.
8) changes in water quality and PH value, every 3-6 months to replace cooling water.
9) each quarter cleaned once a water filter cartridge, the filter is changed once a year (PRC).
3. Host
1) strictly in accordance with the sequence of operation on, off.
2) prohibit non-qualified personnel to operate and maintain the machine.
During 3) machine work, prohibited people and goods entering the table, to ensure human safety; the operator to focus, dangerous situation to press “stop” button as soon as possible.
4) adjust the machine light path, in follow-up mode adjustment of the cutting head must be in the correct sequence of operations to ensure human safety.
5) each boot, to return to the reference point, cleaning up focusing lens, collimated beam – coaxial nozzle, open cutting assist gas bottle pressure should not be less than 1Mpa.
6) checked once a week outside of the light path shielding gas, cold road cabinet, cooling water, air compressor, cold and dry, the water discharge filter.

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