Is the touchscreen of the hot stamping foil slitting machine malfunctioning? Calibration and emergency operations

In the slitting production of hot stamping foil and electrochemical aluminum, the touchscreen acts as the "throat" for interaction between people and equipment. If a malfunction occurs, the entire production line often collapses instantly. Faced with sudden delivery pressure, operators must avoid blindly and repeatedly tapping the screen, as this not only fails to solve the problem but may even lead to misjudgments by the PLC control system.

When the touchscreen shows no response, shifting, or random jumping, how should we conduct scientific troubleshooting and emergency handling? This article will break down the entire process from calibration to blind operation in detail.

Part One: Why does the touchscreen "not adapt to the local environment"?

The working environment of hot stamping foil slitting machines is usually accompanied by extremely fine metal dust (foil shedding layer) and static electricity. The culprit behind touchscreen malfunctions is often not hardware damage, but the following three reasons:

1. Surface oil contamination and dust interference: Oil stains from operators' hands or foil dust from the air adhere to the screen, interfering with the electric field changes of the capacitor or resistor screen.

2. Static Electricity Accumulation Discharge: During high-speed winding and unwinding, hot stamping foil generates high-voltage static electricity. If the equipment is poorly grounded, static electricity may discharge through the touchscreen surface, causing temporary logical confusion.

3. Coordinate positioning offset: Long-term frequent operation or device vibrations may cause loss of calibration parameters inside the touchscreen, resulting in the phenomenon of "button A clicking triggers function B."

Part Two: The Ultimate Calibration Guide

Before contacting the manufacturer for repair, 90% of software or drift-related faults can be resolved by recalibration. Most industrial slitting machines (such as those using Delta, VWEILON, or Siemens touchscreens) have built-in calibration programs.

The steps are as follows:

1. Deep cleaning (prerequisite): Use a soft non-woven fabric dipped in a small amount of 75% alcohol and wipe clockwise along the edge of the screen. Pay special attention to cleaning the grooves of the infrared touchscreen, and never use corrosive cleaners.

2. Enter calibration mode:

◦ General method: After the touchscreen starts, on the system interface or after the slitting machine turns off the main power, press and hold the center of the screen (or a specific factory reset point, such as the top left corner) to restart the machine.

◦ Brand-specific key: Some Delishi or other brands of intelligent slitting machines will release a hidden "Touch Calibration" option in the standby interface by pressing and holding the "Settings" and "Help" buttons for 5-10 seconds.

◦ PLC backend calibration: If your device is equipped with high-end control systems like the Guowang C106Y, it will usually automatically guide you to a white-background interface after reboot, where you need to click the crosshair in sequence for precise alignment.

3. Perform clicking: Use a stylus or ballpoint pen (no sharp metal objects allowed) to precisely tap the crosshair center that appears sequentially on the screen until calibration is complete and saved automatically.

Part Three: Emergency Operations When the Touchscreen Goes Black or Crashes

If your production line is running at high speed and the screen suddenly crashes and cannot be stopped immediately for repair, or you urgently need to finish the current coil finishing work, you can use the following physical emergency measures.

1. "Blind operation" and panel replacement

• Most hot stamping foil slitting machines (such as the Xiamen Delish series) focus on touchscreens, but for safety redundancy, the body still retains physical buttons.

• Emergency Activation Process:

◦ Stop: Directly tap the red emergency stop button (this is the highest priority physical breakpoint).

◦ Start/Dod: When the touchscreen is down but the PLC is powered normally, try pressing the green "Start" or "Dod" button on the control panel.

◦ Foil Threading and Tension: When the screen fails, manually bypass the sensor and locate the magnetic guide roller or manually adjust the mechanical tension handle, temporarily switching the automatic mode to manual mechanical mode.

2. Forced restart

• If the slitting machine is still running but the screen is stuck, it is recommended to immediately press the main power switch on the side of the device or disconnect the circuit breaker.

• Note: Always wait until the screen backlight is completely off (about 30 seconds) before closing again. This effectively clears capacitive memory overflow caused by static electricity. After restarting, the device usually returns to the most recently saved parameter state.

Part Four: Fundamental Measures and Protection Recommendations

To avoid frequent occurrences of such issues, it is recommended to include the following measures in daily maintenance:

• Enable "self-diagnosis mode": When you're not busy, you can try holding down both the "start" and "stop" buttons for 5 seconds. Many Delishi slitting machines have built-in self-diagnostic modes that can automatically detect touch lag and dead pixels on the screen.

• Upgrade dust prevention solutions: If the workshop has a lot of dust, consider requiring the manufacturer to install a metal shield or apply an anti-glare dust film on the outside of the touch screen to prevent cutting fluid or dust from penetrating.

• Check grounding: Regularly check whether the grounding wire of the slitting machine is intact. Eliminating static interference is the most effective way to protect the touchscreen.

Summary

When the touchscreen of the hot stamping foil slitting machine fails, the core idea is "one wipe, two calibration, three restarts." First, clean, then enter the hidden menu for calibration through specific gestures, and finally use physical buttons to complete emergency finishing. Only by mastering these combined soft and hard operational skills can one calmly handle unexpected situations during slitting tasks and ensure production progress is not affected.