Troubleshooting and Solutions for UV Printers
Sep 25, 2025| White Ink Mistting: Troubleshooting and Solutions for YDM Vision Positioning UV Printers
| White Ink Mistting (Flying Ink) | |
|---|---|
| Possible Cause | Solution |
| Incorrect printing height | Adjust the print head carriage to within 2 mm of the product surface. |
| Nozzle deflection or misdirection | Print a test plot to check for nozzle deflection. Clean the print head with cleaning fluid. |
| Incorrect waveform | Try replacing with a different waveform file. |
| Voltage too high or too low | Adjust the voltage. |
| Ink appears like misting because colors are not properly applied. | Check and re-apply all colors. |
| Some print heads may appear normal on paper, but ink misting occurs on certain surfaces due to low ink droplet weight. | 1. Reduce the printing speed. 2. Increase ink supply and increase the cutter power. 3. If caused by static, wipe with alcohol or a static-cleaning fluid. |
| Ink settlement due to non-functioning stirrer. | Check if the stirrer motor is broken or if the wiring is incorrect. |
| If the print head temperature or secondary ink cartridge temperature is too low, droplet weight decreases, causing high misting. | Increase or decrease the temperature (depending on the specific situation). |
| Static electricity on the product | Wipe the product with alcohol. |
| For models with many channels (e.g., siphon 13), printing fine lines is prone to misting. Too little ink causes non-white output, while the correct amount causes small dots around the lines. | Try closing one or four channels. |
| Misting occurs on the left side when printing rightward, and on the right side when printing leftward (i.e., misting follows the print direction). | 1. Adjust the negative pressure and voltage (e.g., decrease negative pressure or increase voltage, or vice versa). 2. Printing height is too high; check and adjust. |
| If misting occurs in the opposite direction (e.g., right side mists when printing leftward, or right side mists when printing rightward). | Colors are not properly applied. |
| The cast pattern effect from the customer is inconsistent. | In Photoshop, slightly reducing the pattern by 2 pixels can yield better results. For white products, this prevents ink from misting onto the metal frame, resulting in a cleaner print. |
| The created PS image has scattered points on the edges. | If the color coverage within a pixel is below 50%, the magic wand tool may not select it. After creating the image, use the vision software's custom spot color settings. Replace the background (with black or red) to check for stray black points on the edges. |
| Airflow interference | Change the direction of air conditioner or fan vents. Close doors and windows. |
| Incorrect negative pressure | Find the critical point for negative pressure. For example, at -3.5 kPa, a slight amount of ink should be visible on the nozzle face. When priming, observe if ink is drawn back in. If the ink neither retracts after 5 seconds nor drips, the state is good. If worried about ink accumulation during heavy printing, increase negative pressure slightly by 0.1 kPa. If negative pressure is already too high, increasing voltage forces ink out inconsistently, resulting in scattered droplets. |
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