How often to pull a sheet when the camera is already on
The pull covers what the camera does not do. The interval needs a number. Keep the sample you pull.
With the camera on, still pull a sheet at a fixed interval, to catch what the camera does not look at: a colour difference it does not measure, or the smallest type it cannot read. Write the interval on the job ticket, for example one at the head and one at the tail of each roll, or one every two thousand metres. Do not write “pull any time”.
Why it is judged this way
If you never pull a sheet because the camera is on, you are saying the camera covers every customer requirement. Most of the time it does not. List what the camera does not cover. Those items are the reason for the pull. The pull result and the camera record go on the same job ticket.
What to compare
| What you see | What to call it | What not to do |
|---|---|---|
| The pull is for items the camera does not measure | It means something | Look again at large dirt the camera already caught |
| The interval is written as metres or per roll | It can be done | Write “any time” |
| The sample was not kept | The same as not pulling | Only a signature |
At job change or when a roll is opened
- List the items the camera does not cover.
- Set the interval.
- Keep the pulled sample with the job ticket.
