XR640 feed roll going loose on one side on long job

[mac_man_luke]

Hello all

We are in the process of printing a bunch of rolls of mesh banner on our XR640

Having a problem feed roll going loose on one side on long job and it walking a bit - having to reposition it after 10 or 20m sometimes
when id like to be able to send a full 50m down at once.

Iv been making sure i load it super accurate. I played with the position front to back of the roll but there was only a few mm of slack in the screws etc. Didn't seem to make much difference.

Any suggestions would be appreciated.

thanks
Luke

 

[CS-SignSupply]

Is this the only roll/material you see the issue with?

 

[Behrmon]

Are you using all the pinch rollers?

 

[Ragnabrok]

the media on the holders are really dependent on a good grip from their bolt. Those bolts strip from a cool summer breeze it seems. If the bolts aren't holding, they'll slip and have one side of the media sag.

Another possible issue if you are using the take up reel, the dancer bar can also get bumped out of alignment. It has 2 screws on either end that can be loosened, the bar adjusted and tightened again. finding the adjustment that works best is the tricky part.

A worn pinch roller, or grit roller with a bunch of stuff packed into it can also cause this.