Ricoh D124 Detailed Descriptions Manual page 30

Roll Paper Path
 The roll end sensor (7) detects when Roll Unit 2 runs out of paper.
 The roll entrance sensor (8) detects the leading edge of the paper fed manually
when a roll is loaded for Roll Unit 2. This sensor triggers the roll feed sequence
and feeds paper into the vertical feed path.
 The exit sensor (9) detects the leading edge of the paper as it feeds from Roll Unit
2. it also detects the leading edge of the roll paper as it is rewound onto the roll so
the roll can be removed.
 The roll end sensor (10) detects when Roll Unit 1 runs out of paper.
 The roll entrance sensor (11) detects the leading edge of the paper fed manually
when a roll is loaded for Roll Unit 1. This sensor triggers the roll feed sequence
and feeds paper into the vertical feed path.
 The exit sensor (12) detects the leading edge of the paper as it feeds from Roll
Unit 1. it also detects the leading edge of the roll paper as it is rewound onto the
roll so the roll can be removed.
 The pre-registration sensor (13) detects the leading edge of the roll paper as it is
fed into the vertical paper path from a roll below.
 The DRESS sensor (14) functions as a paper registration sensor during paper
feed. It detects the leading edge of the roll paper, allows the paper to feed out of
the machine for a prescribed distance, and then signals the machine to reverse
feed the paper to the registration standby position. This sensor also functions as
an image registration sensor and triggers printing when it detects the leading edge
of the roll fed from the registration standby position at the start of a job. After
cutting at the end of a job, the DRESS sensor once again detects the edge of the
paper and switches off reverse feed so that the paper stops at the registration
standby position for the next job.
 The exit sensor (15) detects the trailing edge of the roll paper as it leaves the main
machine after cutting.
 The bypass sensor (16) detects the presence of paper in the bypass feed path.
 There are two standby positions. When paper from Roll Unit 1 is at the registration
standby position (17), the machine rewinds the paper to the first paper standby
position 1 (18) if Roll Unit 2 or bypass feed is selected for a job. Similarly, when
paper from Roll Unit 2 is at the registration standby position (17), the machine
rewinds the paper to the second paper standby position 2 (19) if Roll Unit 1 or
bypass feed is selected for a job. Both the paper standby positions are 51.5 mm
away from the pre-registration sensor.
D124 24 Detailed Descriptions