Epson Scan 2500 Operating Principles Printer Mechanism Operation 42, MULTI-FEED PREVENTION MECHANISM, Figure 2-9. Multiple Paper Loading Prevention Mechanism (right side view)

EPSON Stylus Scan 2500 Revision A
Operating Principles Printer Mechanism Operation 42
MULTI-FEED PREVENTION MECHANISM
Like the Stylus COLOR 740 ASF, the ASF built in the Stylus Scan has the
multiple-paper-feeding-prevention mechanism to provide accurate and
consistent paper feeding. This mechanism prevents a sheet of paper from
falling from the paper set position into the paper path. A paper return
lever in the mechanism pushes paper that may have fallen off back onto
the hopper. After this motion is completed, the LD roller starts loading
paper. The multiple-paper-feeding-prevention operation is described in
the following steps.
1. When the printer power is turned on, the ASF/Pump motor rot ates
counterclockwise to detect ASF home position. Then the motor rotates
clockwise specified steps to set the LD roller and paper return l ever to
their proper positions. (See “Standby State” in Figure 2-9.)
2. When the paper loading signal is sent from the PC or the Load/Eject
button is pressed, the PF motor turns counterclockwise to let the LD roller
load paper. (See “Paper Pick Up State” in Figure 2-9.)
3. Due to the design of the ASF, the LD roller loses friction on the paper and
stops at the point where the paper is fed by the PF roller. (See “PF Roller
Paper Feed State” in Figure 2-9.)
4. When the next print signal is sent or the Load/Eject button is again
pressed, the PF motor rotates clockwise a specified number of steps to set
the LD roller and the paper return lever in place. (See “Standby State” in
Figure 2-9.)
NOTE: If no print signal is sent for a predetermined number of seconds in step 4,
the LD roller and t h e paper return lever automatically return to the
standby state.
Figure 2-9. Multiple Paper Loading Prevention Mechanism (right side view)