Sharp AR-RB1 Service Manual - Page 10

(3) Reverse tray delivery operation A. When paper length is 249mm or less (letter size or less) (Both the paper input motor and upper turnover motor operate) The paper input motor and upper turnover motor are caused to turn in time with the copier processing speed, thus transporting the paper. When the trailing edge of the paper reaches a point 13mm from the copier POD off, the transport speed in RB1 is accelerated. Trailing edge of paper reaches point 13mm from POD off When the trailing edge of the paper reaches the upper reverse stop point, the motor stops. Processing speed Transport speed (high speed) Motor stop (paper stop) The upper turnover motor is caused to revolve in the paper delivery direction, and the paper is discharged. When the trailing edge of the paper reaches a point 50mm before the delivery roller, the transport speed decreases. After the trailing edge of the paper passes the delivery roller, the upper turnover motor stops. Transport speed (high speed) Trailing edge of paper reaches point 50mm before delivery roller Transport speed (low speed) Motor stop (discharge complete) The relation between the process speed and the transport speed in RB1 is as follow. Paper kind Normal paper Thick paper 1 Copier process speed 117/140 58.5 RB1 transport speed (high speed) 550 195 Paper size A3/A3W /EXTRA A4R A4/B5/B5R B4/A5 All size RB1 transport speed (low speed) 450 430 400 320 195 Unit: mm/s Sensor input, motor output, solenoid output timing is as below. POD (Paper exit sensor) BPPD1 (Transport sensor 1) BPOD (Paper-out sensor) BIM (Paper-in motor) Process speed BRM (Direction of paper-in) (Upper reverse motor) (Direction of paper-out) BGSOL (Gate solenoid) High speed Low speed High speed AR-RB1 DESCRIPTION OF OPERATION 4 - 3