Enter the material width, minimum defect, and line speed to select one camera and check line-rate margin, illumination, optics, and synchronization.
| Select | Model | Quote | Line width | Max. line rate | Margin | Interface | Status |
|---|
The exposure time was calculated without TDI gain. We will confirm the final value after the operating mode is selected.
A line-scan camera captures one line at a time, and the image is assembled from lines as the web or part moves. The tool therefore treats two independent axes: across the motion — how many pixels the line must have; along the motion — how fast lines must be captured. It then checks the exposure, the frequency headroom, whether an encoder is required, and selects catalogue cameras whose line length and maximum line rate satisfy the requirements.
px/mm = N_px / width; required line length N_px = width / defect · n_px, where n_px is pixels per defect (3, 5 or 10).f_line = v · (px/mm along the motion), where v is the speed in mm/s. With a square object pixel the along-motion resolution equals the across-motion resolution.N = ceil(width · k / tolerance); the along-motion step is set separately when only the width is measured.1 / f_line; 0.8 of the period is available for exposure, the rest is readout.Example 1. Line rate. Speed 500 mm/s, resolution 24.48 px/mm: line rate 12 240 Hz. With 20 % headroom the camera must deliver at least 14 700 lines/s.
Example 2. Web inspection. Web 1250 mm, defect 0.5 mm, 5 px per defect: 12 500 px per line — a 16k camera. 60 m/min equals 1000 mm/s; with a square 0.1 mm pixel the line rate is 10 000 Hz and the exposure no longer than 80 µs. Such an exposure needs a high-intensity line light.
Example 3. Width measurement. Web 1250 mm, tolerance ±0.1 mm, 3 px per tolerance: 37 500 px across. If sampling is needed in both directions at 1000 mm/s — 30 000 lines/s, 36 000 with headroom. If only the width is measured, the along-motion step can be 1 mm — 1000 lines/s. Without an encoder this setup is not considered fit for measurement.
Example 4. Several cameras. When the required line length exceeds available cameras, the web is split between several cameras with overlap; the optics of each camera is computed from its own field and working distance.
When the object is long or continuous (web, belt, sheet, pipe), moves at a known speed and needs high resolution across its width. An area camera either lacks the resolution or requires complex frame stitching.
For measurement — yes, it drives the line rate from actual displacement. For defect detection at stable speed the internal generator is acceptable if the speed deviation stays within 10 %; beyond that the tool requires an encoder.
No longer than 0.8 of the line period; the rest is readout. At 10 000 lines/s that is 80 µs. If light is insufficient, use a brighter line light, a larger aperture or a TDI camera.
The camera must deliver a line rate 20 % above the calculated one. This covers speed fluctuations and overhead. A camera at the limit gets the “at the limit” status and does not qualify.
The selected camera, the number of cameras and the lens focal length rounded to 0.1 mm. Cables, frame grabber and power are checked further in the configurator.
| Speed, m/min | Object sampling, mm | px/mm | Line rate, Hz |
|---|---|---|---|
| 10 | 0.05 | 20 | 3,333 |
| 10 | 0.1 | 10 | 1,667 |
| 10 | 0.2 | 5 | 833 |
| 10 | 0.5 | 2 | 333 |
| 30 | 0.05 | 20 | 10,000 |
| 30 | 0.1 | 10 | 5,000 |
| 30 | 0.2 | 5 | 2,500 |
| 30 | 0.5 | 2 | 1,000 |
| 60 | 0.05 | 20 | 20,000 |
| 60 | 0.1 | 10 | 10,000 |
| 60 | 0.2 | 5 | 5,000 |
| 60 | 0.5 | 2 | 2,000 |
| 120 | 0.05 | 20 | 40,000 |
| 120 | 0.1 | 10 | 20,000 |
| 120 | 0.2 | 5 | 10,000 |
| 120 | 0.5 | 2 | 4,000 |
| 300 | 0.05 | 20 | 100,000 |
| 300 | 0.1 | 10 | 50,000 |
| 300 | 0.2 | 5 | 25,000 |
| 300 | 0.5 | 2 | 10,000 |
| Web width, mm | Feature, mm | Pixels per feature | Required, px | Nearest catalog width, px |
|---|---|---|---|---|
| 300 | 0.2 | 3 | 4,500 | 7,360 |
| 300 | 0.2 | 5 | 7,500 | 8,192 |
| 300 | 0.5 | 3 | 1,800 | 2,048 |
| 300 | 0.5 | 5 | 3,000 | 4,096 |
| 300 | 1 | 3 | 900 | 2,048 |
| 300 | 1 | 5 | 1,500 | 2,048 |
| 600 | 0.2 | 3 | 9,000 | 16,384 |
| 600 | 0.2 | 5 | 15,000 | 16,384 |
| 600 | 0.5 | 3 | 3,600 | 4,096 |
| 600 | 0.5 | 5 | 6,000 | 7,360 |
| 600 | 1 | 3 | 1,800 | 2,048 |
| 600 | 1 | 5 | 3,000 | 4,096 |
| 1,250 | 0.2 | 3 | 18,750 | 23,424 |
| 1,250 | 0.2 | 5 | 31,250 | — |
| 1,250 | 0.5 | 3 | 7,500 | 8,192 |
| 1,250 | 0.5 | 5 | 12,500 | 16,384 |
| 1,250 | 1 | 3 | 3,750 | 4,096 |
| 1,250 | 1 | 5 | 6,250 | 7,360 |
| 2,000 | 0.2 | 3 | 30,000 | — |
| 2,000 | 0.2 | 5 | 50,000 | — |
| 2,000 | 0.5 | 3 | 12,000 | 16,384 |
| 2,000 | 0.5 | 5 | 20,000 | 23,424 |
| 2,000 | 1 | 3 | 6,000 | 7,360 |
| 2,000 | 1 | 5 | 10,000 | 16,384 |