En tant que personne ayant beaucoup travaillé avec flexion and shearing machinery, I’m excited to share my insights on the E21 and E21S controller. These controllers are essential for optimizing performance and ensuring precision in metal fabrication processes. In this overview, I’ll discuss the key features and benefits of the E21 and E21S controller, explaining how they enhance the functionality of flexion and shearing operations. Whether you’re a seasoned professional or new to the industry, understanding these controllers will help you maximize your equipment’s potential and improve overall efficiency in your workflow.

The E21 controller and E21S controller are the most commonly used controllers for hydraulic machines à cintrer and hydraulic shearing machines in China, and they are also very commonly used as standard controllers when exported overseas. When customers’ requirements for machine efficiency and accuracy of processed workpieces are not very high, the E21 controller and E21S controller become the best choices because of the advantages of simple operation and low price. This article will focus on the bending machine E21 controller and shearing machine E21S controller features advantages and common troubleshooting.

● Bending Machine E21 Controller

E21 Controller Advantages

1. High-definition LCD display, with Chinese and English two languages to choose from, one page displays programming parameters, writing the program more quickly and easily.

2. X, Y axis can only be positioned, but also manually adjusted as needed to remove the mechanical hand crank positioning device.

3. Built-in pressure-holding time and unloading delay setting function, easier to operate, no need for time relay, reduce cost.

4. With one key backup and recovery function of parameters, the parameters can be restored at any time as needed to reduce maintenance costs.

5. Support multi-step programming, complex workpieces can be processed at one time to improve production efficiency and processing accuracy.

6. All the keys on the panel are micro-switches, which are strictly tested for EMC, high and low temperature, vibration, etc. To ensure the stability and service life of the product.

7. Passed CE certification to meet overseas market demand.

Controller Troubleshooting

1. bending machine power on the CNC controller display is not normal.

Fault and solution: This fault is generally caused by software. The operation process of mis operation or regular abnormal shutdown may lead to the loss of files, so that software can not operate normally. Can be judged according to the tips of the controller, and then decide whether to reinstall software.

2. Slider movement failure

Fault and solution: bending machine slider movement can be divided into four processes, for the start-up back to zero, fast drive, work stroke and slider return. y-axis zero slider does not move: measured according to the electrical schematic diagram, in order to determine whether the hydraulic controller failure. If the servo valve gets power normally, it is the fault of the hydraulic controller, otherwise it is the fault of the electrical controller. No fast forwarding of the slider: the fast forwarding of the slider is generated by the return of oil from the lower chamber, relying on weight of the slider to form negative pressure in the upper chamber to absorb oil, but the servo valve powers to the hydraulic controller failure or electrical controller failure, and then targeted solutions.

3. The pressure automatically calculated by the controller is greater than the mold impedance

Failure and solution: 1. programming the lower die selection is not reasonable, should follow the relationship between the plate thickness and the lower die opening to select the mold; 2. the impedance of the mold is not set correctly, correctly set the mold impedance; 3. programming bending mode selection is not correct, need to check the program; 4. machine constants parameters are modified, need to check the machine constants parameters such as material parameters, unit selection and other parameters.

Fault and solution: 1. slider not to the speed conversion point, check whether the Y-axis state from “2” to “3”, the actual value of the Y-axis should be greater than the speed conversion point value, if not need to adjust the fast-forward part of the parameters; 2. controller Y-axis bending part of the parameters set badly. Need to re-adjust the Y-axis bending part of the parameters; 3. Pressure is not enough, such as: programming operation reasons, machine tool parameters set up reasons, hydraulic reasons, etc, check whether the programming operation reasons, or parameters set up reasons, or hydraulic reasons; with help of pressure gauges, multimeters, etc. First detect main pressure and proportional pressure valve signal, and then check the proportional pressure valve, main pressure reducing valve is not stuck, and then check the filter element and oil, and finally check the oil pump and its coupling. Finally, check the oil pump and its coupling.

4. Sliders can not work when bending or bending at a very slow speed

5. Programming a large arc bending, the controller calculation is very slow or dead.

Failure and solution: 1. The X value set during programming exceeds maximum value of the X axis in the parameters; need to check the program.

6. Motor controller error

Failure and solution: servo motor error (according to the error code to determine the type of error); power off and restart (power off time greater than 10 seconds).

Démo vidéo

● Shearing Machine E21S Controller

E21S Controller Advantages

1. High-definition LCD displays two language options in Chinese and English. One page displays programming parameters, writing the program more quickly and easily.

2. Intelligent positioning of the backstop can also be manually adjusted as needed to remove the mechanical hand crank positioning device.

3. Shear stroke built-in shear time relay, simple operation, cost saving.

4. Shear angle built-in shear angle adjustment function, eliminating the angle indicator and button.

5. Knife gap encoder feedback, timely display of the size of the knife gap, simple and convenient operation.

6. With a key backup and recovery function of parameters, you can restore the parameters at any time as needed to reduce maintenance costs.

7. All the keys on the panel are micro-switches, which have been strictly tested for EMC, high and low temperature, vibration, etc. To ensure the stability and service life of the product.

8. Passed CE certification to meet the needs of overseas markets.

E21S Controller Troubleshooting

1. The number does not go, plus or minus can go, but if the number does not go, press the run key will keep rushing to the forefront or the last.

Fault and solution: may be a bad encoder or line off, generally check the coupling is not bad, if there is no problem and then wiring, the line color sequence for the black, red, white, green or black, red, green and white, where COM is black.

2. Press “plus” or “minus” the machine does not move.

Failure and solution: the first step to check whether the number is greater than 500 or less than 10, if in the soft limit, that is, already very large or very small, can no longer be increased or reduced, as long as the upper right corner of the number can be. If there is a special number like 655.53, pay attention to the reset parameters restart, the specific method is to press and hold the programming, P0 set 0, P1 set 0.15, P2 set 0, P3 set 40, P4 set 1.5-2, P5 set 0.9, P6 set 0.15, P7 set 10, P8 set 500.

If the above numbers are normal, check R1, R2 and RC. In fact, the controller is to control the closure of R1, R2 and RC, and if the controller output is damaged due to the limit switch, it will also cause the phenomenon of immobility. So you need to exclude whether the external travel limit switch is damaged, the way is to directly short R1, R2 and RC to see if the external line is normal, if the short, the machine can move back and forth, indicating that controller failure; if not, it means that the external line is out of order, you need to ask an electrician to troubleshoot.

When controller failure, we also need to confirm that it is not a key problem, the key pressed will have a ticking sound, if rows and rows of keys without sound, indicating that the key part of the problem, may be the motherboard or key part of the problem. If you want to replace the key surface stickers, you can try directly into it, without tearing off, because after tearing off regardless of good or bad it can not be returned.

Finally, you can disassemble the motherboard, check if the relay part of the back of the circuit board is not burned paste.

3. The display does not show

Failure and solution: Generally, the power supply is no power or in the old controller to replace the new version of the controller is easy to appear, because the new controller requirements independent power supply. Remember that the transformer can not be a common zero, so in this situation, the requirement to notify the technical department to change the independent power supply before the trial.

4. Digital jumping is not in place.

Failure and solution: may be a pitch mismatch, P3 = 400/pitch, adjust the parameters to set P6 to 0, adjust P4 for 100 run 200 for operation, the closer the better. After confirming the adjustment of P4, and then adjust P6 to manually press and hold plus do not release, jumping 0.2 as appropriate.

5. alignment is not allowed

Failure and solution: the first step to check the coupling, or test the repeat positioning accuracy, such as 100 open to 200 and then back to 100, repeat a few round trips, if a change occurs, indicating that the coupling is loose, tighten it up.

Then check whether it is an enlargement trend, if the more after the error, this is P3 adjustment is not right, just like the car refueling, the greater the parameters go more, you can calculate the actual parameters proportionally: formula P3 actual = (P original / actual distance traveled) * data theoretical distance traveled, for example, the number runs from 100 to 200, the actual 100 runs to 180, the original default P3 is 40, then P3 Actual = 40 / (180-100) * (200-100) = 50.

Démo vidéo