For operators, the daily maintenance of manipulator is very important. Next, let’s introduce some precautions:
Guide rails and bearings at all shafts should be kept clean and well lubricated. If the manipulator operates in a dusty environment, the guide rail needs to be cleaned frequently. If you find any metal fragments or powder, it may indicate poor lubrication. In order to ensure proper lubrication, it is very important to have an appropriate linear guide system. Most mechanical NTN bearing hands have automatic lubrication systems and components that need to be replaced regularly.
One of the key points to keep the manipulator running well is simple observation and listening, which can reveal a lot of information about the overall operation of the manipulator. The manipulator works through specific actions, so listen to any abnormal sounds, such as whistling, clicking, etc., which indicate that the bearing cannot rotate normally or some other component is stuck. The link part of the manipulator moves along the guide rail equipped with power cable and vacuum hose, and will make a normal ticking sound, but this sound is smooth and stable. Check any observable bearings to make sure they rotate smoothly. Just checking and listening to some signs of wear or adjustment can help to keep the manipulator in better operation.
If the manipulator is driven by assembly frame transmission gear, pay attention to whether there is any hesitation or shaking during operation. All movements except smooth and smooth movements can indicate that the drive system is damaged or some foreign objects are stored inside. When the manipulator moves downward, the method to quickly check the action or backlash between the assembly beam and the transmission gear is to push and drag the moving arm and feel abnormal movement (different back and forth movements).
However, due to the high tolerance accuracy of normal manufacturers, this test method will be very inaccurate. If you suspect that there may be a problem with the assembly beam and transmission gear, it is better to use a magnetic meter base with a long range. After adjusting the backlash according to the manufacturer’s instructions, check all the stroke of the shaft to ensure that there is no too tight place between the assembly beam and the transmission gear.
If the backlash cannot be adjusted, the assembly frame and transmission gear may be worn and need to be replaced. If it is necessary to repair the assembly frame and drive gear, replace both components at the same time to maintain long-term performance.
As for the shaft driven by the conveyor belt, pay close attention to the wear of the conveyor belt, falling debris and its own damage. Carefully check the pulley for signs of dust from the conveyor belt material. Ensure that the belts and drive pulleys and sheaves are fully aligned. Belts that deviate from the direction will wear away very quickly. As long as it is a conveyor belt driven system, check the preload of the conveyor belt itself according to the manufacturer’s instructions. These specifications will tell you the appropriate amount of error in the specific position of the conveyor belt relative to the pulley.
Including multi axial servo drive, almost all manipulators have pneumatic function as long as they have rotating wrist and vacuum grasping action. Pay close attention to the suction cup of the filter pressure regulating valve unit. The accumulation of water indicates that the humidity of the compressed air source passing through the system is too high. The presence of a small amount of water and gas may be transmitted to the pneumatic valve and actuator, causing oxidation and internal pollution, which may lead to the sticking of the pressure regulating valve or the intermittent sticking or failure of the actuator.
If the suction cup is equipped with an automatic dehumidification system, contamination or discoloration on the suction cup also indicates that water vapor is increasing before removal. If water accumulates in the suction cup, it can enter the system even for a short time, causing the above problems. If you notice any physical damage to the pneumatic hose, the system may leak.
If the pneumatic circuit is filled with air at normal operating pressure and there is a leak somewhere in the circuit, you should be more likely to find an obvious hissing sound, which will help you determine the location of the leak.
The manipulator with standard configuration is usually installed on the template of forming equipment. When the equipment is running rapidly, the vibration from the forming equipment may be transmitted to the manipulator and may cause damage. Simply observe the operation of the forming equipment, ensure that the mold movement is adjusted to a reasonable state, reduce the shaking or vibration times, and prolong the service life of the manipulator.
In high-speed operation, the vibration frequency may be very high, so that the manipulator can be installed on a support structure independent of the forming equipment.
When checking the mechanical watch surface, if black particles or powder are found, it indicates that there are signs of wear on the circuit wiring of the manipulator. However, even if you can’t find these wear signals, carefully look at all power supply, transformer or encoder cables, both inside and outside the wiring path, because during the production cycle, the wiring of the continuous friction manipulator or the wiring connected to the cable guide rail will be worn and invalid. Ensure the safety of wiring ties and the reasonable installation of cables.
The manipulator uses spring-loaded lubricating rods, which only need to be replaced once a year unless there is evidence that the guide rail lubrication is insufficient. Equipped with automatic lubrication system, it can continuously lubricate along the movement of the manipulator. However, if there are some surfaces on which the manipulator cannot move normally, these areas shall be lubricated manually or by regular program-controlled action of automatic system lubrication.
If you find rust, corrosion or wear on any moving surface, or just too dry, they are not lubricated enough. Always refer to the manipulator manual for reasonable lubrication of metal parts. Assembly beam – the conventional gear system is automatically lubricated through the lubricating oil storage unit, but needs to be replaced every year.
The vacuum should be formed nearly instantaneously, and the controller input suitable for fag bearing should be equivalent to grasping the product. If you find that the vacuum is turned on and then the input light source appears with a delay of more than 2 seconds, it indicates that the vacuum pipeline is leaking, defective or the switching device is improperly adjusted. It is easy to test through the plug-in main control panel.
If the manipulator is equipped with a digital vacuum switching unit,
Then it can quickly and automatically fine tune the small threshold of vacuum required to grasp NSK bearing products. This process can be completed when the manipulator operates in automatic operation mode. Save the set parameters of each production cycle in the memory, which can save time in the next production change. The digital vacuum switching device has two other advantages: the electronic filter for grasping the threshold signal makes up for the vibration of the products on the vacuum suction cup during rapid movement. The product release threshold is different from the grab threshold, which can be programmed to ensure appropriate release under the condition of rapid production cycle.