Any machine will encounter machine faults during use. If you want to solve machine faults, you must first understand the cause of the fault and eliminate the fault accordingly. The following are some common faults and troubleshooting methods encountered during the operation of the press.
| Failure phenomenon | Common cause | Elimination method and maintenance |
| The press cannot be operated with inching motion | 1. Check whether the LED at 1.2.3 of the PC control input terminal of the press is on? | 1. Check whether the press line is off or disconnected, or the switch is faulty, just replace it with a new one. |
| Yes: continue to check. | ||
| No: Check the input signal. | ||
| 2. Are the LEDs 5 and 6 of the PC control input (within 0.2 seconds) on? | 2. Check whether the button switch circuit part is off or disconnected, or the button is faulty, just replace it with a new one. | |
| Yes: continue to check. | ||
| No: Check the input signal. | ||
| 3. Is the LED of PC control input 19 on? | 3. Refer to the brake adjustment method of the press clutch to adjust it. | |
| Yes: Check the clutch. | ||
| No: Continue to check. | ||
| 4. Are the LEDs of the PC control output 13, 14, 15 on? | 4. Check for other abnormal reasons such as overload, second fall failure, cam failure, speed reduction or emergency stop. Please check the PC controller. | |
| Yes: Check the reason. | ||
| No: PC controller problem. | ||
| The press cannot be stopped in an emergency | 1. The press button switch is faulty. | 1. Replace the press button switch. |
| 2. The circuit of the precision press is faulty. | 2. Check whether the relevant circuit part is off or disconnected. | |
| 3. The PC controller of the press is faulty. | 3. Please contact Mingxin Machinery to check and repair the PC controller. | |
| The red light stays on for the second time | 1. The brake angle and time are long due to the damage of the press clutch. | 1. Adjust it according to the adjustment method of the press brake. |
| 2. The transmission mechanism in the rotating cam box fails or is fixed | 2. Check whether the umbrella tooth of the transmission rotating camshaft is off, the micro switch | |
| Click to stop, the micro switch is damaged and the circuit is loose. | Replace or inspect the line and tighten it. | |
| 3. The line is faulty. | 3. Check the relevant lines. | |
| 4. The problem of PC controller. | 4. Send a commissioner to overhaul. | |
| Two-handed operation | 1. Check the LEDs of the PC input terminals 5 and 6 of the press (press at the same time | 1. Check the left and right hand switch circuit part or replace the switch. |
| 0.2 seconds) Is it on? | ||
| 2. PC controller problem. | 2. Send a commissioner to overhaul. | |
| Second fall failure | 1. The fixed position of the press proximity switch is loose. | 1. Remove the square pointer plate, there is a square proximity switch and an iron ring cam inside, adjust the gap between the two to within 2mm. |
| (fast flashing) | ||
| 2. The proximity switch is broken. | 2. Replace with a new proximity switch. | |
| 3. The line is faulty. | 3. Inspect the relevant parts of the line. | |
| An Yi dysfunction | 1. Improper adjustment of the angle of the rotary cam of the press. | 1. Adjust the rotating cam appropriately. |
| 2. The rotary cam micro switch is malfunctioning. | 2. Replace with a new jog switch. | |
| The positioning stop position is not at the top dead center | 1. Improper adjustment of the angle of the rotating cam. | 1. Make proper adjustments. |
| 2. The brake is an inevitable phenomenon caused by long-term wear of the film. | 2. Renew. | |
| Emergency stop is invalid | 1. The line is off or disconnected. | 1. Check and tighten the screws. |
| or emergency stop cannot be reset | 2. The button switch is faulty. | 2. Replace. |
| 3. Insufficient air pressure. | 3. Check whether the air leak or the air compressor energy is sufficient. | |
| 4. The overload device is not reset. | 4. Refer to the reset of the overload device. | |
| 5. The slider adjustment device switch is placed at "NO". | 5. Cut to "OFF". | |
| 6. A second fall occurs. | 6. Refer to the reset of the second drop device. | |
| 7. The speed is about zero. | 7. Find out the reason and try to get the speed back up. | |
| 8. The problem of PC controller. | 8. Send a commissioner to overhaul. | |
| Motorized slider adjustment failure | 1. The non-fuse switch is not set to "ON". | 1. Place it at "ON". |
| 2. The thermal relay used for motor protection has tripped. | 2. Press the reset handle to reset. | |
| 3. Reach the upper and lower limits of the setting range. | 3. Check. | |
| 4. The overload device is not ready to be completed, and the red light is not extinguished. | 4. Reset according to the overload reset method. | |
| 5. The slider adjustment device switch is placed at "NO". | 5. Put it at "OFF". | |
| 6. Improper adjustment of balancer pressure. | 6. Check | |
| 7. The electromagnetic contactor of the press is faulty and cannot be put on. | 7. Replace. | |
| 8. Line failure. | 8. Check the motor circuit part, and related electrical materials, or check the transmission | |
| Driven by gears, or damage to the fixing screws of the non-fuse top switch. | ||
| 9. The button or switch is faulty. | 9. Replace. | |
| When the pressure is large, the slider stops at the end point position | 1. The problem between the cam in the cam box and the micro switch. | 1. Make appropriate adjustments. |
| 2. The micro switch is faulty. | 2. Replace. | |
| Slider to adjust leakage | 1. There is a rupture in the motor circuit and it touches the metal part. | 1. Wrap the circuit with tape. |
| Slider adjustment cannot be stopped | 1. The electromagnetic switch of the press cannot absorb reset. | 1. Replace. |
| 2. The line is faulty. | 2. Inspect the relevant parts of the line. | |
| The main motor cannot run or cannot run after the main motor is activated | 1. The motor circuit is off or disconnected. | 1. Inspect and tighten the screws and connect the lines. |
| 2. The thermal relay of the press bounces or is damaged. | 2. Press the thermal relay reset handle, or replace with a new thermal relay | |
| Electrical appliances. | ||
| 3. The motor activation button or stop button is damaged. | 3. Replace. | |
| 4. The contactor is damaged. | 4. Replace. | |
| 5. The operation selector switch is not placed at the "cut" position. | 5. The operation selector switch is not placed at the "cut" position. | |
| The counter does not work | 1. The selector switch is not set to "NO". | 1. Place it at "ON". |
| 2. The rotary cam switch is faulty. | 2. Replace the micro switch. | |
| 3. The press counter is damaged. | 3. Overhaul and replace with new ones. | |
| The barometric light does not light up | 1. The bulb burned out. | 1. Replace. |
| 2. Insufficient air pressure. | 2. Check for air leakage or review of air pressure capability. | |
| 3. The pressure switch setting value is too high. | 3. Adjust the set pressure to 4-5.5kg/c㎡. | |
| 4. The pressure switch of the press is damaged. | 4. Replace the pressure switch. | |
| The press cannot be operated in conjunction | 1. Check whether the motion switch or linkage preparation button is off-line or disconnected, or whether it is faulty. | 1. Check the relevant circuit part, or replace the switch and button switch |
Post time: Aug-25-2021