Top 13 CNC Plasma Cutter Issues and Expert Fixes

Problems	Cause of Issue	Solutions
Turn on the host "power switch", the power light does not light	1. "Power Indicator" light is broken	replace
	2. 2A Fuse is bad	replace
	3. no input three-phase 380V voltage	Overhaul
	4. input 380V three-phase voltage phase loss. "Lack of phase indicator" light	Use multimeter to measure three-phase voltage should meet the requirements
	5. power and so on	replace
	6. bad control panel or host	Overhaul
After the input three-phase power is turned on, the fan does not turn, but the "Power Indicator" light is on	1. input three-phase power phase loss	Building materials approach with the table 1.4
	2. the fan leaves stuck by foreign bodies	Remove foreign body
	3. the fan power plug loose	Re-insert
	4. Fan lead off	Overhaul
	5. the fan is damaged	Replace or overhaul
Turn on the three-phase input power, the power indicator light, fan rotation is normal, but open the "test gas" switch, the torch nozzle without air flow	1. no input compressed air	Maintenance of gas supply and gas pipeline
	2. the host back "air filter pressure regulator" imbalance, pressure gauge indicates zero. "Underpressure" indicates red light	Re-adjust the pressure. Method: turn clockwise "air filter pressure reducer" hand wheel to increase, otherwise reduce.
	3. "test gas" bad light	replace
	4. the host electromagnetic valve is bad	Overhaul or replace
	5. gas pipeline leaks or short circuit	Overhaul
Turn on the "test gas" switch, the nozzle has air flow, when the closure of the "cut" light, closed the torch switch, but neither air jet nor the host program action	1. torch switch broken or broken switch line	Replace or overhaul
	2. "cut" switch is bad	replace
	3. the host control circuit board damage	Overhaul
	4. the host control transformer or related lines or components damaged	Overhaul
	5. the host due to lack of pressure over temperature and other reasons in the protection downtime	Until the air pressure returned to normal or the host temperature returned to normal after its return to normal
	6. Water-cooled cutting torch equipped with water cooling system is not working properly, or lack of water in the tank, causing the lack of pressure, so that the host is in a protected state	Check and solve, if the Department of Tap water supply pressure, water pressure should be increased
Turn on the torch switch with air flow in the nozzle but neither "up" nor "up" cut	1. input three-phase power phase loss	Overhaul
	2. air pressure less than 0.45Mpa	Adjust to normal by the method described in Table 3.2
	3. the input air flow is too small	Increase the input air flow 300L / min
	4. "cut the ground" chuck and workpiece poor conductive or "cut ground wire" wire fracture	Clamp or service conductor again
	5. cutting torch nozzle electrode or other parts damaged	Replacement of new parts
	6. cutting method is not correct	The torch nozzle should be placed on the starting point of the workpiece cutting before turning on the torch switch
	7. cutting torch cable open circuit	Use the multimeter R * 10 file to measure the path between the conductive part of the host "output interface" and the torch electrode, otherwise the surface cable is broken
	8. the host "FD" spark gap too large or short circuit	Re-adjust the tungsten rod gap is about 0.5mm-0.8mm, if the Department of tungsten rod structure, the two gaps add equal to 0.5mm-0.8mm
	9. the host part of the line or component damage, such as pressure controller	Overhaul
	10, the host control board disorders or damage	Overhaul or replace
	11. torch damage	Use a multimeter R * 10K file cutting torch electrode holder and the external thread M32 or M35 resistance value should be close to ∽ to hundreds of K, if the resistance is too small (such as a few K-a few Ω) indicates damage or damp, should After washing and drying measurements, to confirm the damage should be replaced
Contact can be cut, but non-contact can not be cut, the experiment non-transfer arc non-sparking nozzle	1.15A fuse fuse open circuit	replace
	2. "air filter pressure reducer" indicates the value is too high	Adjust according to the method shown in Table 3.2
	3. Torch electrode nozzle or other parts damaged	replace
	4. cutting torch damp, compressed air moisture content is too large	The torch is dried and the compressed air is dried and then into the machine
	5. "pilot arc interface" to cut the wire between the torch open	Use the multimeter R * 10 file to measure the "pilot arc interface" terminal and the metal torch cutting torch should pass
	6. cutting torch damage	The inspection method is the same as this table 5.11
Cutting thickness selection switch placed in a file can be cut, but the other file does not work	1. cut thick switch or wire selection bad	replace
	2. one of the host AC contactor CJ1 or CJ2 bad	Replace or repair
	3. rectifier main transformer B1 bad or related wire open circuit	service
Electric arc unstable at work	1. the pressure is too low or too high	Readjustment, method refer to table 3.2
	2. cutting torch nozzle or electrode burning	replace
	3. input AC voltage is too low	Adjust input AC voltage
	4. "cut the ground" and poor work between the conductive	Connected properly
	5. cutting moving slowly	Adjust the speed of movement
	6. the spark generator can not automatically broken arc	Normal, open the torch switch spark generator discharge time should be 0.5-1S, and then automatically stop, otherwise, that control circuit board disorders; control circuit or component failure, should be overhaul
	7. the relevant components in the host is not working properly	Overhaul
Plasma cutting thickness up to rated indicators	1. input three-phase voltage up to 380V	Adjust the input voltage
	2. the input power capacity is too small cutting pressure drop too much	Should increase the input capacity
	3. enter the compressed air pressure is too low or too high	Adjust to 0.4Mpa, the method see Table 3.2
	4. enter the compressed air flow is too small, work pressure gauge shows the value dropped from normal to about 0.3Mpa, stop working turn off the power switch, the pressure back to normal immediately	Plus the input compressed air flow to 300L / min; if the system is based on the pipe hole is too small, should be greater than φ8mm bore hole in the pipeline
	5. "cut thickness selection" switch the gear selected inappropriate	Exchange to "upscale"
	6. cutting speed too fast	Slow down the cutting speed
	7. the work material does not match with Table 2	Adjustment parameters
	8. the nozzle hole has been burned	Adjust the new nozzle
	9. the electrode has been burned	replace
	10. the nozzle model is wrong	Adjust the correct type of nozzle
	11. air system or cutting torch cable damage leakage, then the nozzle orifice flow was significantly reduced	Repair or replace
Cut material bias	1. the nozzle electrode is damaged	replace
	2. the nozzle electrode mounting position is different axis	Re-install correctly
	3. cutting too fast	Appropriate slow down
	4. the nozzle axis and the workpiece plane is not vertical	Adjust and solve
Cutting too wide, poor quality incision	1. cutting speed is too slow	Adjust the speed
	2. the nozzle, the electrode has been burned	Updated
	3. the working material, thickness and "cut thick choice" switch position does not match	Adjustment
	4. the nozzle model is not correct, the hole is too large	Replace the correct type of nozzle
Plasma cutting torch burn out	1. the metal pressure cap is not compressed	Usually replace the electrode nozzle should be promptly compressed
	2. cutting torch conductive joints loose, broken cable trachea, water-cooled torch interface leakage	Check and solve in time
	3. cutting torch joints poor insulation	Should ensure that the insulation at the junction of good
	4. cutting torch ceramic protective cover is damaged, but not promptly replaced	Should be promptly replaced
	5. compressed air in excess water	Timely discharge "air filter pressure reducer" in the water, if the compressed air moisture content
	6. boot cutting, cutting torch model wrong	Parallel cutting should choose water-cooled cutting torch, air-cooled cutting torch carrying capacity is too small, can not be used
	7. the electrode is not replaced after burning	Electrode burn should be promptly updated
	8. water-cooled torch working water system is not normal or the ambient temperature is too low, the interface leakage	Check and solve, and can not work in the freezing temperature environment
Rectifier diodes D1-D6 often burn out	1. the new diode reverse reverse voltage is too low	Reverse voltage withstand> 1200V diode should be selected
	2. C101-C103; C104; C106 or R101; R102 in one or a few damaged	replace
	3. rectifier transformer B1 is damaged	Replace or repair
	4. Plasma cutting torch is damaged	Remove the torch from the main unit, with a multimeter R * 10K file measuring electrode and the torch external thread M32 or M35. the resistance value should be close to ∽, if under tens of K, has been damaged

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