1. The slider of the CNC hydraulic bending machine cannot descend quickly or descends very slowly
| Check Point | Action |
|---|---|
| 1.1 Foot switch | Refer to DM02 module |
| 1.2 Intermediate relay KA2 | Use a multimeter to check the electric control signal |
| 1.3 Servo proportional valve | Carefully check during the diagnosis process |
| 1.4 Material blocking shaft | Check the status of the X and Y axes on the display when not in place |
2. The CNC hydraulic bending machine has no work progress
| Check Point | Action |
|---|---|
| 2.1 PV valve | Check the signal or clean it |
| 2.2 Filling valve | Remove and clean if there is no progress on one side |
| 2.3 Intermediate relay | Check the signal status |
3. The CNC hydraulic bending machine cannot return or returns very slowly
| Check Point | Action |
|---|---|
| 3.1 PV valve | Check the signal or clear it |
| 3.2 Intermediate relay KA1 | Check the signal |
| 3.3 Slider position | Check the workpiece status, program and related parameters if not in place |
4. The bending force of the CNC hydraulic press is insufficient and the oil temperature is high
| Check Point | Action |
|---|---|
| 4.1 Hydraulic oil | Check whether contaminated and dirty |
| 4.2 Filter element | Needs to be replaced |
| 4.3 Oil pump | Check for damage |
| 4.4 Proportional pressure valve | Clean if dirty |
| 4.5 Main valve | Re-tighten if loose |
5. The oil cylinder of the CNC hydraulic bending machine descends slowly
(the descending speed is less than 2mm/min, and it gradually stops after descending 2-3mm, which is normal)
| Check Point | Action |
|---|---|
| 5.1 Back pressure valve | Clean if dirty |
| 5.2 Electric control one-way valve | Clean if dirty |
| 5.3 Oil cylinder | Check for internal leakage |
6. Whether the slider of the CNC hydraulic press operates flexibly
| Check Point | Action |
|---|---|
| 6.1 Slider guide rail | Check the tightness |
| 6.2 Machine parameters | Make adjustments as needed |
7. The bending angle or size of the bending machine is inaccurate
| Check Point | Action |
|---|---|
| 7.1 Angles on both sides | Can be corrected on the system |
| 7.2 Slider connection | Check if loose |
| 7.3 Workpiece material | Check material and its uniformity |
| 7.4 Mold condition | Check if worn |
| 7.5 Size issues | First check the parallelism of the back stopper, then check the stopper itself |
