Note that it is insufficient to measure this value at one point and it is crucial to measure as many points as possible for length issues. Ultimately, a non destructive system like SEAM360 is a way to ensure that the Seam Length is correct around the entire circumference of the can.
How to measure Seam Length?
- Seam length can be measured manually using a seam micrometer,
- Since seam length is apparently unaffected by cutting the seam (double seam section saw) the measurement can be done automatically using a seam inspection software such as SEAMetal.
Possible causes of high (excessive) Seam Length:
- 1st operation roll setup is too loose!
- 2nd operation roll setup is too tight!
- Damaged tooling
- Long Body Hook
- Incorrect roll profile!
- Worn or damaged tooling!
How to fix it?
The simplest way to fix excessive Seam length is to use a clearance gauge.