PIXMA iP8720 Roller lines?!

[Sunset924]

 

Can anyone help me out?

I have a Canon PIXMA ip8720

When I print any type of larger area with black I seem to get these roller lines, or at least that's what it looks like. It's only with black. I'll attach a photo. As you can see, the red is fine, no lines at all

If anyone can help me out, I'd really appreciate it 

[Patrick]

Hi Sunset924,

What version of Windows are you using?
If you are using a Mac, what version of OSX is installed?

What is the size and type of paper that you are using?

What program are you using to print your images?