PNC-12 EXTREME
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procedure. After completion of each shift, the machine shall be moved to the middle of the guide rail and
then the general gas source and power supply shall be closed.
6.2 OPERATION PROCEDURES OF CNC CUTTING
MACHINE
Before going to operate the machine
1. Check each gas pipe and valve. Leakage is not allowed. Check if the gas safety device is effective.
2. Check if the inlet pressure of gases provided meets the stipulated requirement.
3. Check if the supply voltage provided meets the stipulated requirement.
4. (During
operation)
5. Adjust the steel plate cut and make it parallel with the track as much as possible.
6. Select a proper cutting nozzle according to plate thickness and material. Make the cutting nozzle
vertical to the steel plate.
7. Reset the cutting speed and preheating time again in the machine according to different plate
thicknesses and materials. Also, set up reasonable pressures for preheating oxygen and cutting
oxygen.
8. Nobody is allowed to get contact with the flame area after ignition. Operators should choose a
cutting method to be less slug’s blow up, and this protects cutting nozzle.
9. Check the heating flame and cutting oxygen jet flow. When it is found that cutting nozzle has stains
or flame shape is strange, cutting tips shall be immediately replaced and cleared. Special tool that is
provided with the machine shall be used to clear the cutting nozzle.
10. If flashback occurs during cutting, the power supply shall be timely cut off. Shut down the machine
and close the gas valve. If the flashback burns valve block, it shall not be used any more. Wait the
manufacturer or supervisor to replace the valve block.
11. When the operator operates the machine, the operation condition of the device shall be noticed
constantly. If an abnormal condition is found, and gas smell or other peculiar smells are found, the
emergency stop switch shall be pressed down immediately to exit from the workstation. It is strictly
forbidden to leave from the site when the machine is under operation.
12. Operator shall make sure the cutting torch is lifted to the original position after cutting of one
workpiece and then the cutting can be carried out again after it runs to the next station.
13. Operator shall select cutting speed according to selected cutting consumables. It is not
recommended to just increase the load of machine to improve operation efficiency. Proper operation
is related to machine’s life time, job efficiency and environmental protection.
14. When overhead travelling crane carries things, the crane should not pass over the machine in case .
After finishing work
1. After work, the machine shall be moved to the safety place and gas valve shall be closed. Residual
gases in the pipe shall be emptied and power supply shall be closed.
2. Bundled special tools shall be checked every things are there and taken back.
3. When working shift time, it’s recommend to record machine’s working condition by previous shift
member to the continuing shift member.
4. It is required to carefully clean the site and keep the work area tidy and orderly.
