i've found out how to add a custom paper size for the FX-880 printer, so I was able to set it for the Check form I am configuring to print on continuous form.

Now I am facing this problem: if i print one single check it does it fine, but when i print several the printing keeps moving up and up, if i print like 10 checks the printing won't be at the right positions.

how can i fix this?

I measured the form it is 8.44 x 7.31 inch 21.5 x 18.5 cm

i set it up in the server, but still no success