Having a problem with a line in the print on a roland SP300?

[gtjet]

I am getting a line perpendicular to the direction the print head moves across the print on all four colors (cmyk), the yellow/magenta almost line up and the black/cyan are very close if not in line, the line is about an eight of an inch thick and will run as tall as the print cutting right through the color being printed. Any idea what this is? Thanks.

 

[ballgame]

Dirt on the linear encoder

 

[gtjet]

That is the strip between the two plastic guides/protector strips?

 

[gtjet]

Is there a way to locate the affected area and clean it?

 

[RebelTT]

i usually put a piece of white paper behind and follow it to see any marks on it. What do u guys recommend to clean the strip with?

 

[MachServTech]

you can cut windex 50% with water and use it safely.

 

[MachServTech]

I am getting a line perpendicular to the direction the print head moves across the print on all four colors (cmyk), the yellow/magenta almost line up and the black/cyan are very close if not in line, the line is about an eight of an inch thick and will run as tall as the print cutting right through the color being printed. Any idea what this is? Thanks.

pictures if you can, please

 

[Pacific Coast Sign]

Yep! Dirty encoder strip. Don't forget to clean behind where the head parks..everyone seems to forget this and end up buying a new encoder strip.