Frequently Asked Questions (FAQ)

Welcome to our FAQ page!
Here you’ll find detailed answers to the most common questions about our Precision Cutting Services Worldwide, including CNC and waterjet cutting machine maintenance, cutting equipment repair and installation, and professional spare parts supply.

Whether you are exploring our cutting solutions for the first time or you’re an existing client seeking technical details on machine disassembly, upgrades, or global cutting industry recruitment, this section is designed to provide clear and reliable information.

If you can’t find the information you’re looking for, please contact our team — we’re here to provide tailored assistance.

Drive Alert (Yaskawa)

Serial number	Drive Alert	Normal operating standards	Failure Analysis	Exception handling solution
1	A.710 Overload	bb/run	Instantaneous maximum load) Operation with a torque significantly exceeding the rated value for several seconds to tens of seconds.	Confirm that the motor wiring and encoder wiring are Is there a problem? Improve mechanical factors. Servo unit failure. Replace Servo unit.
2	A.720 Overload	bb/run	(Continuous maximum load) Continuous operation was performed with a torque exceeding the rated value.	Confirm that the motor wiring and encoder wiring are Is there a problem? Improve mechanical factors. Servo unit failure. Replace Servo unit.
3	A.F10	bb/run	Power line phase loss When the main power is on, the voltage of one of the R, S, or T phases is too low for more than 1 second.	Check whether there is any problem with the power wiring. Correct the imbalance of the power supply (switch phases). Set the correct power input and parameters. Reconnect the power supply and the alarm still occurs The servo unit may be faulty. Replace the servo unit
4	A.7AB	bb/run	The fan inside the servo unit stops. Check whether there is any foreign object stuck in it.	If the alarm still occurs after removing the foreign object, The servo unit may be faulty. Replace Servo unit.
5	A.C90	bb/run	Encoder communication fault The encoder connector has poor contact or the connector is wired incorrectly. Check the encoder connector status. Insert the encoder connector again and check the encoder wiring. The encoder cable is broken, short-circuited, or a cable with an impedance exceeding the specified value is used. Check the encoder cable status.	Correctly wire the encoder peripherals (Separate the encoder cable from the servo motor Main circuit cable, grounding treatment, etc.).
6	A.910	bb/run	Overload pre-alarm is a warning display before reaching overload alarm (A.710 or A.720). If the operation continues, an alarm may occur.	Overload pre-alarm is a warning display before reaching overload alarm (A.710 or A.720). If the operation continues, an alarm may occur.

Drive Alarm (Panasonic)

Serial number	Drive Alert	Failure Analysis	Exception handling solution
1	16.0	Overload protection (U/V/W cable connector is loose. Brake BK protection is not enabled.	Check if the cable connection is correct and remove any loose cables. Check whether the 24V power supply is connected normally
2	21.0	The encoder cable is disconnected (one of the encoder cables is disconnected)	Check if the cable connection is correct and remove any loose cables.
3	40.0	Absolute system shutdown protection	The battery voltage in the battery box is lower than 3.6V. Disconnect the battery from the driver and motor and reconnect them. The absolute encoder needs to be reset.

Drive alarm (Weihong)

Serial number	Drive alarm	Operation Standard	Inspection Tools	Abnormal maintenance method
1	Err 16.0 Overload protection	Pulse Digital	Poor gain adjustment causes oscillation and vibration. The motor vibrates and makes abnormal sounds. The setting value of the inertia ratio Pr004 is abnormal. Motor wiring is incorrect or wires are broken. The machine is hit or the load suddenly becomes heavier, causing twisting and winding.	Connect the motor wires correctly according to the wiring diagram. Replace the cable. Eliminate entanglement. Reduce load. Connect the motor cable and encoder cable to their corresponding axes correctly.
2	Err 21.0★Encoder communication disconnection abnormal protection	Pulse Digital	The communication between the encoder and the driver is interrupted after reaching a certain number of times, activating the disconnection detection function.	Check the encoder cable to see if the SD+ and SD- signals are twisted pairs. Connect the encoder line correctly according to the wiring diagram. Correct the incorrect wiring of the connector plug.
3	Err 40.0 ★Absolute type System power failure abnormality Protect	Pulse Digital	The encoder power supply and battery power supply are stopped. The built-in capacitor voltage is lower than the specified value.	Connect the battery power supply and absolute encoder The device performs a clearing operation.

Platform maintenance

Serial number	Maintenance content	Cause Analysis	Alarm handling method	Alarm handling method
1	The platform needs to be cleaned every day	After the cutting process, sand and water will be splashed on the upper surface of the folded cloth.	It needs to be cleaned in time, otherwise the service life of the folding cloth will be reduced.	It needs to be cleaned in time, otherwise the service life of the folding cloth will be reduced.
2	The screw guide rail is disassembled and folded for cleaning every month	The lead screw will wear and collect dust during operation .	The folding cloth should be removed and cleaned promptly every month.	The folding cloth should be removed and cleaned promptly every month.
3	Check the lubrication pump oil level daily	The lubricating oil pump supplies lubricating oil to the screw guide rail to prevent the screw guide rail from rusting and maintain the service life of the screw guide rail.	The lubricating oil pump supplies lubricating oil to the screw guide rail to prevent the screw guide rail from rusting and maintain the service life of the screw guide rail.	The lubricating oil pump supplies lubricating oil to the screw guide rail to prevent the screw guide rail from rusting and maintain the service life of the screw guide rail.
4	Clean the dust inside the CNC control cabinet every month	During the use of the equipment, dust will enter the control cabinet through the cooling fan, and the static electricity from the dust will cause damage to electrical components, which may even cause a fire.	During the use of the equipment, dust will enter the control cabinet through the cooling fan, and the static electricity from the dust will cause damage to electrical components, which may even cause a fire.	Monthly Cleaning

Frequently asked questions

Serial number	Alert content	Result reason analysis	Alarm handling method
1	Observation hole leaking	This causes the pressure to drop, the cutting efficiency to drop, and the low-pressure water enters the sand conveying pipeline, causing sand to get stuck.	Solution: 1. Tighten the cutting head. 2. Replace the water nozzle. 3. Replace the cutter head extension rod.
2	Water column divergence	Cutting efficiency is reduced and metal cannot be cut	Solution: 1. Replace the water nozzle. 2. Replace the sand tube. 3. Replace the cutting head.
3	The observation hole under the water switch valve body is leaking	This causes the pressure to drop, the cutting efficiency to drop, and the low-pressure water enters the sand conveying pipeline, causing sand to get stuck.	1、 Tighten the tool head extension. 2、 Replace the water switch valve gasket. 3、 Replace the cutter head extension. 4、 Replace the water switch valve body.
4	Water flows out of the sand pipe when the water switch is turned off	This causes the pressure to drop, the cutting efficiency to drop, and the low-pressure water enters the sand conveying pipeline, causing sand to get stuck.	Replacement water switch repair kit
5	The observation hole on the water switch valve body is leaking	This causes the pressure to drop, the cutting efficiency to drop, and the low-pressure water enters the sand conveying pipeline, causing sand to get stuck.	Replacement water switch repair kit
6	When the sand control valve is in the closed state, sand still flows out after the bottom is rotated open.	The sand is out of control and blocks the sand transport pipeline	Replace the sand control valve core and sand control valve block.
7	Operating software backup	Software backup path: My Computer - Drive D - BAK folder - Software backup compressed file

Water Leakage Issues

Num	Water leakage	Normal operating standards	Failure Analysis	Exception handling solution
1	Water leakage from the end cover observation hole	Normal standard: The frequency of oil or water leakage at the end cover observation hole shall not exceed 20 drops/min.	1. The oil temperature is too high, causing the high-pressure ring to fail or reach the end of its service life	If there is water leakage, replace the seal plunger (218-00018-02) at the corresponding observation hole. (See the replacement video for details)
2	End nut observation hole water leakage	Standard: The water leakage frequency at the end nut observation hole shall not exceed 20 drops/minute.	1. The oil temperature is too high, causing the high-pressure ring to fail or reach the end of its service life	If there is serious water leakage, replace the seal plunger (218-00018-02)
3	Water leaks from the end of the check valve main body and the check valve main body	Standard: No water leakage.	1. The temperature is too high 2. There is a problem with the fit between the pilot and the end seat (104-00122-001)	1. If there is water leakage, replace the O-ring (210-00333-10) on the check valve main body 2. If it is still leaking after replacing the sealing ring, replace the check valve main body or end nut
4	Check whether there is water leakage at the joint between the high-pressure pipe and each joint	Standard: No water leakage.	1. The gland nut (104-00077-0101) is not tightened 2. The end of the high-pressure pipe (104-00077-0101) needs to be adjusted	1. Tighten the gland nut with 2 wrenches in the opposite direction 2. If still leak after tightening, check the high-pressure pipe end for damage or if it is damaged
5	Check the HP threaded sleeve hole if water leakage	Standard: No water leakage.	1. The outlet check valve (104-00091-0101) is loose 2. The outlet check valve (104-00108-0101) insert has reached the end of its service life (300 hours)	1. Tighten the outlet check valve (104-00091-0101) and the HP threaded sleeve (104-00126-0101) 2. If there is still water leakage, remove the outlet check valve (104-00091-0101) and check the outlet check valve main body (104-00122-0101) for damage, replace them in time
6	Abnormal pressure	Visual inspection standard: The pressure gauge pointer swings between 7-10mpa, and the pressure is unstable when there is no water pressure.	1. The opponent is taking water (104-00003-0101 is 218-00033-01) 2. The high pressure pump is not pressurized 3. The water supply pressure is unstable	1. Check the solenoid valve (218-00033-01) 2. Replace parts (210-00033-01, 104-00107-0101) 3. Check the water supply system pressure

Oil Leakage Issues

Serial number	Oil leakage	Normal operating standards	Failure Analysis	Contents
1	There is oil leakage in the end cover observation hole	The oil leakage frequency at the end cover observation hole shall not exceed 20 drops/min.	The oil temperature is too high or the U-ring is damaged as service life	If there is oil leakage, replace U-ring (218-00016-02) inside the end cover.
2	There is oil leakage in the pipelines and joints of the oil system	There must be no oil leakage at any pipe joint.	The oil temperature is too high, or the gasket or O-ring combined service life has failed	If there is leakage, replace the assembly gaskets or sealing ring in time.
3	Intercooler oil leakage	There should be no oil leakage between the oil plate and the supercharger.	Oil leakage caused by loose or oil-oxidized tightening flange	Replace the O-ring 32.8×2.1 (310-00426-10), remove the supercharger and the valve plate.
4	Check whether the regulating valve block and the regulating valve have oil leakage	There must be no oil leakage.	1. The sealed gasket fails 2. The high and low pressure adjustment valve has pressure	If there is oil leakage at the plug-in, replace the O-ring and the oil leakage at the high and low pressure adjustment valve (104-00123-0101). If the valve block is found to be damaged, replace it in time.
5	Oil pressure gauge leaking	There should be no oil leakage at the oil gauge.	1. The pressure gauge is damaged 2. Air enters the oil pump	Replace the oil pressure gauge (396-12006-01) if it is damaged.

Maintenance Inspection

Serial number	Maintenance inspection	Operation Standards	Inspection Tools	Abnormal maintenance method
1	Is the reversing valve even?	There is no abnormality in the commutation, and it is uniform and stable. Standard frequency.	Visual inspection.	Replace the relevant parts as per abnormal situation.
2	During operation, is the oil temperature too high?	The oil temperature should not exceed 50°C.	Visual inspection.	1. Check the cooling device 2. Inefficient circulating oil circuit blockage or wrong type selection
3	Is the main motor running normally?	Standard: Normal operation, no abnormal sound.	Visual and auditory inspection.	The fan blades are damaged or fall off and interfere with the guard. Replace the fan blades.
4	Check all components, contacts, and circuits	No looseness.	Visual inspection, check by hand.	Replace aging or burned circuits and check whether the contact circuits are loose.
5	Maintenance of end nuts and high pressure cylinders	Inspection cycle: 250 hours	Tools and methods: end nut tooling, high pressure cylinder tooling	1. Clean the standard, supply gas, take out and install correctly without leakage 2. Use 2 wrenches to disassemble and tighten to make it effective and durable. First, use a hammer to knock the end nut in the opposite direction of rotation, then use a wrench to disassemble (218-00017-0101, 104-00107-0101) 3. Use a tie rod to disassemble one end and restore it to be able to disassemble on opposite side
6	Whether the check valve main body and the outlet check valves are hot: (The check valve main body heating can also be manifested as the high-pressure cylinder and end nut heating)	The problem with the check valve main body and the outlet check valve main body and other parts temperature.	Touch with your hands.	If the check valve main body is hot, replace the poppet and grind with the check valve main body surface with the same abrasive (210-00123-0101). If the outlet check valve is hot, replace the insert and outlet poppet.
7	Grinding poppet and the check valve main body	Inspection cycle: 100 hours	Grinding plates and metallographic sandpaper (2000 grit)	If the contact surface is scratched, replace it immediately.
8	Replace the poppet and check valve screw	Inspection cycle: 500 hours	Open wrench (8×10), adjustable wrench	Standard: Grind the check valve main body surface until it is smooth and flat without any defects, replace the poppet (104-00136-0101), and then tighten it with a torque wrench.
9	Replace seal plunger	The leakage of the end cover and end nut observation hole shall not exceed 20 drops per minute	High pressure cylinder tooling	Inspection cycle: 400 hours Tools and methods: High-pressure ring removal tool (107-11010-0101) Standard: Correct installation direction, no leakage
10	Grinding outlet poppet and insert	Inspection cycle: 100 hours Standard: Flat surface without dents	Grinding plates and metallographic sandpaper	Grinding contact surface
11	Replace the water filter element（206-12062-01 and 206-12063-01 ）	Inspection cycle: 300 hours Standard: No water leakage after installation	Water filter tooling	The filter element becomes black or has a lot of impurities. You need to replace it with a new one. It will be fine if there is no leakage.
12	Replace the sensor spring	Inspection cycle: 500 hours There is no jamming after the spring is installed	No. 4 hexagon socket	Disassemble the sensor, take out the push rod and spring, clean the inside, replace the new spring, and restore it until there is no leakage.
13	Replace the low pressure seal	Inspection cycle: 2000 hours /year	1.Torque wrench 2.Adjustable wrench 3.Circlip pliers (internal circlip) 4.Rubber hammer lubricating oil	Remove the old low-pressure seal assembly（218-00151-01 and 218-00152-01）, clean the end cover, install the new low-pressure seal assembly, and apply lubricating oil.
14	Clean the oil tank and replace the hydraulic oil	Inspection cycle: 2000 hours / year	Visual	Standard: Clean the oil tank to make sure there are no impurities or foreign objects in it, keep it clean , and replace the oil when impurities appear.

Give An Alert

Serial number	Alert content	Alarm Cause Analysis	Alarm handling method
1	3 consecutive alarms	Water pump output pressure is low	Check the water supply system
2	2 consecutive alarms	Check the pressure relay	Check the pressure relay
3	1 alarm , no interval	Cylinder piston overclocking	1. Change orifice（218-00052-01/218-00053-01） 2. Check the sensor（104-00110-0101） and signal rod（302-5XS04-01）