Canon iPF8000 series Service Manual

Also see for imagePROGRAF iPF8300: Brochure Troubleshooting guide Troubleshooting guide Brochure Setup guide

Contents

Chapter 22-122.3.2.3 Carriage Unit2.3.2.3.1 Functions of Carriage Unit0024-9588a) Printhead mounting functionThe carriage, which fixes the printhead in position mechanically, is connected to the contact of the head relay PCB.b) Control functionThe carriage carries a carriage relay PCB, which relays drive signals from the main controller PCB, a head relay PCB,which relay printhead drive signals to print-head, a linear encoder, which generates print timing signals, and a multi sensor, which detects the width of paper and skews in it, adjusts is registration and headheight.The carriage relay PCB is connected to the main controller PCB by a flexible cable.c) Carriage drive functionThe carriage is caused to reciprocate level on the platen by means of the carriage belt that is driven by the power imparted from the carriage motor.d) Printhead maintenance functionThis printer performs cleaning operations, such as wiping the printhead and sucking inks, with the carriage halted at its home position.e) Nozzle check functionThis printer carries out an ink discharge operation with the carriage halted at the head management sensor, locating a non-discharging nozzle in the printhead.f) Carriage height adjustment functionIf the separation between the face of the printhead and the paper (carriage height) is varied as a result of differing paper thicknesses, cockled or curled paper or otherproblems, the printer is liable to mist generation as the carriage height increases or to head rubbing as the carriage height decreases.To maintain an acceptable carriage height, the lift motor is driven according to the selected paper type, feeding method, print conditions (borderless printing/prior-itized picture quality) , environmental condition(temperature/humidity) and multi sensor measurements to automatically adjust the separation between the face ofthe printhead and the paperThe table below shows the relation between the form kind and the height of the head.T-2-3g) Paper leading edge detection function/paper width detection function/skew detection functionThe multi sensor attached to the lower left part of the carriage detects the leading edge and width of paper feeding on the platen and skews in it.h) Automatic printhead position adjustment functionThe multi sensor attached to the lower left part of the carriage reads an adjustment pattern printed on a form and adjusts the print timing of each printhead automat-ically.i) Remaining roll media detection functionThe printer prints a bar code on roll media upon delivery. The multi sensor attached to the lower left part of the carriage indicates the remaining volume of roll media.j) Internal unit temperature sensorA thermistor installed on the head relay PCB detects the internal unit temperature near the printhead.Height of printhead(mm) Media type (reference) Remarks1.2 Plain paper1.4 Photopaper, Synthetic paper, Film, Plain paper(Line drawing) Capping position1.8 Coated paper(Line drawing)2.0 Plain paper, Coated paper, Fabric banner2.2 Premium matte paper, Fine art(watercolor,block print)2.6 Canvas