Troubleshooting of CNC systems
Troubleshooting of CNC system: Once the CNC system malfunctions, the system operator should take emergency stop measures to stop the system operation and protect the site.
(1) Symptoms of malfunction: ① The working mode of the system malfunction is Tape (paper tape mode), MDI (manual data input mode), Memory (memory mode), EDIT (editing), HANDLE (handwheel), JOG (jog) mode. ② MDI/DPL (manual data input/display). ③ The system status display sometimes does not sound an alarm when the system malfunctions. In this case, it is necessary to observe the system's status through the diagnostic screen The positioning error exceeds the tolerance. ⑤ Alarm and alarm number on CRT. ⑥ The speed at which errors occur in the tool path.
(2) Frequency of malfunction: ① Time and frequency of malfunction occurrence. ② The probability of malfunctions occurring when processing similar workpieces Determine whether the mode of malfunction is related to feed rate, tool change method, or thread cutting The program segment that has malfunctioned.
(3) Repeatability of faults: ① Repeat the program segment that caused the fault multiple times for observation to examine the repeatability of the fault. ② Compare the programmed value of the program segment with the actual value in the system to confirm if there is a difference between the two Has the same malfunction occurred in this system before.
(4) External conditions: ① Environmental temperature. ② Surrounding vibration sources. ③ Check the installation location of the system and whether it is exposed to direct sunlight when a malfunction occurs Whether cutting fluid and lubricating oil have splashed into the system cabinet, whether water has entered the system cabinet, and whether they have been immersed in water (such as leakage from the heating system) Input voltage investigation, whether there are fluctuations in the input power supply, voltage values, etc Is there a device that uses high current in the factory? ⑦ Is there any interference source nearby Are there any machine tools being repaired or debugged nearby, or have new machine tools been installed Is the repeated occurrence of faults related to external factors.
(5) Regarding the operation situation: ① What operation did the malfunction occur after? ② Is the operation method of the machine tool correct Does the program contain incremental instructions for importing pumps.
(6) Machine condition: ① Machine adjustment condition. ② Does the machine tool vibrate during transportation? ③ Is the tip of the tool used normal? ④ Is the offset set when changing the tool? ⑤ Is the gap compensation given appropriately? ⑥ Does the mechanical component deform with temperature changes? ⑦ Is the measurement of the workpiece correct.
(7) Operation status: ① Whether the operation mode has been changed or adjusted during the operation process. ② Is the machine tool in an alarm state. Have you made preparations for good luck? ③ Is the sales rate switch on the machine tool control panel set to "0"? ④ Is the machine tool in a locked state? ⑤ Is the system in an emergency stop state? ⑥ Is the fuse of the system blown? ⑦ Is the mode selection switch on the machine tool control panel set correctly.
(8) Wiring between the machine tool and the system: ① Whether the cables are intact and undamaged. ② Are the AC power cables and internal system wires installed separately? ③ Is the power line and signal line routed separately? ④ Is the signal shielding wire grounded correctly? ⑤ Are electromagnetic components such as relays, electromagnets, and motors equipped with noise suppressors.
(9) Appearance inspection of CNC device: ① Cabinet. Check for damage and whether the operation was carried out with the cabinet door open Inside the cabinet. Is the fan motor working properly? Control partial pollution procedures. ③ Paper tape reader. Is there any dirt on the paper tape reader? ④ Power supply unit. Is the fuse normal? ⑤ Cable. Is the cable connector plug fully inserted and tightened? ⑥ Printed circuit board. Are there any defects in the number of printed circuit boards? ⑦ MDI/CRT unit.
(10) Regarding the inspection of perforated paper tape: ① Check if the paper tape reader's gate is functioning properly. ② Is the setting for paper tape operation correct? ③ Is the paper tape folded, wrinkled, or contaminated? ④ Is the connection of the paper tape normal? ⑤ Is there any damage to the holes on the paper tape Has this paper tape been used before? ⑦ Is black paper tape used or other colored paper tape.
This article is dedicated to the professional manufacturing of engraving machines, laser engraving machines, woodworking engraving machines, fiber laser cutting machines, plasma engraving machines and other equipment, Jinan Ruijie Machinery Equipment Co., Ltd.