factoring fold compensation and caliper paper.

[russpears]

I have been looking at fold compensation and was interested how to go about figuring it based on the caliper of the paper and some reasonable value that accounts for production variations... I just hate the general 3/32 in and 1/16th figures I read about.

Also, how can one best caliper a paper.

 

[Al Ferrari]

For methods, do a search for "creep" i this forum.

For paper calipers:

paper caliper - Google Search

 

[russpears]

I did this and all the posts assume I have a caliper reading to work with not how to get a good reading. I read one post that took 100 sheets and divided this into the reading, which sounds like a good working measure. But there are others that reference a 6 to 9 foot pounds pressure or something like that.

 

[Buntpapier]

What does it get for you or where do you need it for?
There is no paper with less than 5 to 10 % thickness and ingredients variation. If you check the fine print of the paper suppliers you will find a lot, but nothing about thickness and ingredients.
How often you like to measure. I would assume every six month paper changes a lot.
Buntpapier

 

[russpears]

Fold compensation has been just been set from 3/32 to 1/8th as a "Standard". But I feel that I should be able to find some way to factor it using the caliper of the stock and some reasonable latitude for machine variation in the process.