Perf print output longer than artwork

Hi All

We have a wrap with windows combo on a large vehicle. We print the vinyl drops as usual, vertically. Then we rotate the exact same file still in the RIP and print the perf long ways in one piece, the one piece is approx 20ft x 4ft

On measuring the vinyl drop, the output measures exactly as the file says.

The perf printed output however is longer that the artwork measurement. Are we missing something here? We are also using the exact same profile, done this before and not had a problem, though this is causing issue.

i know its thicker material, but the mcahine still feeds it off the roll the same right.

Any help appreciated.

S

 

JV33. The print itself is perfect. Over the 20ft, looking at over an inch longer.

 

Thanks for the advice guys, we ended up printing the individual window sections