How do you prevent that the machine switch to bypass when printing, if the paper runs out in the cassette(s) ?
Setting the "Auto drawer switching" to OFF only affects copying (?)

Know that you can set FRPO value on Kyocea printers to control this. Don't have FRPO setting lists handy, but you can download on KMA site.

http://www.kmaconnect.com/dnetpub/jsp/Kyocera/ResourceDetails.jsp?rid=12152 hope this link works or goto manuals on any current printer.

Hope this helps.

FRPO command R1, I used to set to 99 (switch according to paper size) but I haven't had to touch it on the new mach. You might change it to 0.

Asuming the bypass has letterhead or something program the b ypass for the type. Then set the switching to on and feed only same paper type....otherwise the size and the type is the same as the letter cassette and it will allways switch to the bypass and pull from there.

frpo x9=1 if media type switching is not required.

I forgot to say thanks. I have now solved the problem.