Canon DADF-M1 Service Manual

Also see for DADF-M1: Service manual General Timing Chart/General Circuit Diagram Portable manual Service manual Service bulletin

Contents

Canon DADF-M1 Service Manual Manual pdf 46 page image

Chapter 22-242.4 Document Pickup/Separation2.4.1 Basic Sequence of Operation 0002-9454When the Start key is pressed with an original on the original tray, the machine executes the following sequence of operation to pickup up the original:a. Picking Up the OriginalWhen the pickup motor (M1) rotates in reverse and the pickup clutch (CL1) goes on, the pickup roller unit moves down to start pickup operation. The separationplate and the separation pad are used to prevent multiple feeding of originals. (After the 2nd original, the pickup unit remains in down position.)F-2-23b. Aching the OriginalWhen the original has been moved for a specific number of pulses after the registration sensor has gone on, the original is caused to arch at the No. 1 registrationroller so that it becomes free of any skew.F-2-24c. Sheet-to-Sheet DistanceWhile the original is between the No. 1 registration roller and the No. 2 registration roller, its movement is accelerated so that there will be a sheet-to-sheet distanceat the time it reaches the No. 2 registration roller for reading. The normal rotation maximum speed of the pickup motor is 750 mm/sec; it decelerates to readingspeed at a point 23 mm in front of the No. 2 registration roller to move the original to the No. 2 registration roller.d. Moving the OriginalThe pickup clutch goes off and the pickup motor rotates in normal direction to move the original. The lock motor is driven for locking before the leading edge ofthe original reaches the platen upstream roller (thereby preventing the shock otherwise occurring when the trailing edge of the original leaves the roller). When theoriginal reaches the point of deceleration before reading, the machine checks whether the READY signal is on, in which case it will move the original ahead to thepoint of reading; if the signal is off, the machine keeps the original in wait for reading. (In the case of the 1st original, the machine moves it as far as the read sensorat 650 mm/sec.)M1CL1 OriginalStopperPickup rollerUnitM1CL1 OriginalPickup rollerUnitSeparation plateSeparation padCL1M1ArchingNo. 1 registration roller Registration sensor