cutoff wandering

[spharris]

have m-200 4unit web press and having trouble keeping cutoff on at the sheeter ???? running 2 webs of 35inch 35# paper stock check chill speed a few feet faster than last unit on press last unit going 590feet per minute and chills doing 595 or so both webs seem to be moving together wandering as much as 1/16 or more at cutoff eyemark any ideas out there??????? thanks steve

 

[Alois Senefelder]

Cut-off Variation

Cut-off Variation

Cut - off variation is the result of poor tension control of paper into the Folder/ Sheeter.

# 1 RUN the chill roller surface speed the same as the last unit Blanket Cylinder Speed.

# 2 Check your Silicone Application Roller Speed also check you are applying correct Silicone/Water ratio.

#3 Check the Sheeter Infeed Nip Rollers.


Regards, Alois

 

[spharris]

it was a pin

it was a pin

thanks for the help..... double checked everything .....turned out to be a couple of shear pins in the sheeter knive..... normally when they shear the knive comes to a stop but for some reason the pins still has enough material to keep driving the knive... but had a lot of wiggle in it. put the new shear pins in.... problem solved actually holding cutoff better then..... before this trouble started ......thanks again for your reply .......hope this helps somebody else if they have sheeter problems ....check the shear pins!!! ........best regards ...steve