What fails first on a high-speed beverage line
What fails first on a high-speed beverage line is usually the exposure, not the software suddenly getting dull. The defect is smeared. At 200 m/min and a 0.05 mm pixel, crossing one pixel takes about 15 microseconds.
What fails first on a high-speed beverage line is usually the exposure, not the software suddenly getting dull. The defect is smeared. At 200 m/min and a 0.05 mm pixel, crossing one pixel takes about 15 microseconds. If the exposure is much longer than that, a fine defect blurs. Calculate the exposure before you talk about detection.
Why it is judged this way
When labelling or sleeve speed is high, and the strobe is not enough or the continuous-light exposure is too long, the view smears. Raising the sensitivity then only reports the smear as a defect. Shorten the exposure or raise the strobe first, until the edge of one label is sharp again.
What to compare
| What you see | What to call it | What not to do |
|---|---|---|
| The edge is smeared along the direction of motion | Shorten the exposure first | Add sensitivity |
| The edge is sharp and dirt is still there | Treat it as a defect | Blame the speed |
| After the speed drops, everything is suddenly visible | The optics cannot keep this speed | Write it as a system fault |
At job change or when a roll is opened
- From this line's speed and pixel size, work out the pixel time.
- Look at whether the label edge is smeared.
- Until the smear is gone, do not promise fine-defect capability.
