Method |  - Place three 150 mm scales on the exposure glass, and then copy them.
- Wait at least 3 min. after the paper exits.
- Use a scale to measure 100 mm against each scale image (x1, x2, x3) on the paper.
- Determine the maximum and minimum deviation (%) from the standard.
- Calculate the difference between the maximum and minimum deviation.
- For example, if the three measurements of the scales are 100.4 mm, 99.5 mm, 100.2 mm, then the difference between the maximum and minimum values is 0.9 mm (100.4 – 99.5).
- Set the scales in the main scan direction (horizontal), copy them, and then use the same method to determine the variation
- For best results, using at least three scales is recommended.
- If you have only one scale, then you can make three copies with the scale at different positions.
- Please remember that line speed may vary slightly depending on the number of copies in a job.
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