Paper curling HP 5MP ?

What would cause a HP 5MP printer to output paper with a definite curl
to the paper? Had been producing printed output that was virtually flat.

This now happens whether I use the straight through or other output tray.

I'm using the same 20 pound paper as always. I bought a new pack of
paper to make sure it wasn't due to summer humidity and no difference.

Thanks for any info.

Norm <NOSPAM.RemoveThis@gmail.invalid> wrote:

> What would cause a HP 5MP printer to output paper with a definite curl
> to the paper? Had been producing printed output that was virtually flat.
>
> This now happens whether I use the straight through or other output tray.

With "curl" you want to say that the paper seems to roll up, or is it
"folded" like a leporello?

If the first: it depends of many circumstances. Humidity (of the room
where the printer is and of the paper itself), direction of the fibres
in the paper (are they parallel to the long or to the short edge of the
paper - in German we call this "Laufrichtung"; I did not find the
english translation at this time).

If you have folded output, it's usually the last roller unit which is
dirty and needs cleaning or replacement to transport the paper properly.

Christian
--
Christian F. Buser, Hohle Gasse 6, CH-5507 Mellingen (Switzerland)
Hilfe fuer Strassenkinder in Ghana: http://www.chance-for-children.org