Question warp print problem

looks like encoder strip needs a clean...

 

That doesn't look like an encoder strip problem to me. When it goes bad the image is stair-stepped. My guess is it's either a media alignment issue or bad pinch rollers. When loading the roll, I never tried to align the media, I just grabbed the media in the center from the front and pulled tension against the roll and drop the pinch rollers. If that's not the case, make sure all your pinch rollers are in good condition and roll freely, and check their position.

 

Agree on checking pinch rollers. Especially check the outer rollers. Have the outer rollers been replaced very recently? If so, insure they were the correct rollers and the colored dot on the side of the roller is on the outside. As Jester1167 said encoder strip issue usually results in jagged edges on the image, but the media still tracks straight. A quick test to see if it is a media feeding issue is to set-up your media, then start feeding it out with the control panel button and observe.

 

So... did the encoder strip cleaning work or not?

 

This is what it looks like when you have a bad encoder strip. https://signs101.com/attachments/20191229_185031-jpg.144659/