Sleep+Mode+Time

=How do I set the length of time until the printer goes into sleep mode?=

On the printer select the following: Menu -> System Setup -> Sleep Timer -> = XX min.

Recommended to choose a time of 60 minutes or 240 minutes so the printer doesn't keep cycling on and off (which is extremely annoying). According to Michael Reichmann of the Luminous Landscape, iPF5000 won't go into sleep when it's set to Manual feed mode. It has to be set to Cassette / Roll to go into sleep mode.