VS640i media shifts

[AlexC]

Hi there, when doing print and cut with artworks longer than two metres, the media moves aside then the print is not correctly aligned. Under 2 mts it would work fine, 3-4 mts length printing then the media will move away on the left hand side. I've checked the Pinch Rollers they are good. Checked the levelness of the Printer - looks pretty good.
Still the media moves apart.. Any idea??

Yours,

Alex

[Kai Perry]

Slow down the upspeed, this will allow the tracking to be more precise. The accuracy over 3-4 metres is improved by slowing the speed of cutting as well.

You say you have check the rollers, but check to see if the media pulls forward by hand when it is loaded.

Also try a different media, in case the media is slipping, you can test this by marking the bed and media.

[AlexC]

Hi Kai,

Upseed already set to 15cm/s.Will reduce it some more, I've reduce the problem considerably by adding more pressure on the pinch rollers, the media slips 0.5mm on 3m20 artwork which looks fine.
Regards,

Alex C

[mrtn]

Cracked/worn pinch roller frames, distorted torsion beam.

Do you by any chance leave media loaded overnight often?

[AlexC]

Yeah sometimes media is kept loaded..

Cracked pinch roller frames. will check this out..

Distorted torsion beam you mean the square shaft?

[mrtn]

Yes.