Mutoh VJ1614 Vertical stripes

[symbol]

Hello,
I have a problem with Mutoh 1614 as you can see in the picture vertical stripes appear in two places in the print width 1.37 m
This error occurred after changing the print head, i tried to replace flat cable for print head but problem is still there.
If you have any ideas please let me know.

 

[symbol]

Hello,
lines are shifted according to the width of the material to be printed.

 

[heyskull]

I reckon you have a dirty encoder strip.
Maybe it is shifting because of speed of print.

SC

 

[symbol]

Hello

I checked sncoder and everything is ok but when I change the width of the material that is printed shift and line