Epson 9600 Service Manual - Page 107

EPSON Stylus Pro 7600/9600 † HD_SLID (Head Gap Home Position Detection) Sensor This sensor detects the mechanical home position when the position of the subcarriage (head height from the paper surface) on the carriage undergoes change. A reflective type photosensor is used and the position of the flag on the gear mounted on the camshaft is detected. The cam is so shaped as to realize the four head positions relative to the mechanical home position. „ Detecting distance up to the reflector: 7.5 ± 0.5 mm NOTE: Error number displayed when the total pulse count has exceeded 1000: 0001000C Head slide origin detection error (Service Call Error) Table 2-4. Pulse Positions Position Gap Width Application Large Medium Small Minimum One round 2.6 mm 2.2 mm 1.2 mm 0.7 mm Platen gap for thick paper Platen gap for paper which can be soiled if setting is for thin paper Platen gap for thin paper Platen gap for film Pulse Count from Origin (Converted to 2- 2 Phase Excitation) 37 121 204 287 333 Revision A Start Sequence for moving to pseudo-vacuum position Slide Sensor OFF Yes ? No Pump motor runs forward until head slide origin sensor turns OFF No Slide Sensor OFF ? Yes Pump motor runs forward until head slide origin sensor turns ON No Slide Sensor ON ? Yes After head slide origin sensor turns ON, pump motor runs forward by 10 pulses Pump motor runs forward until head slide origin sensor turns OFF No Slide Sensor OFF ? Yes Pump motor runs forward by 204 pulses (till the "Small" platen gap position) Pump motor runs forward by 18 pulses (till epicyclic gear release) End Figure 2-5. Head Slide (PG Change) Initialization Sequence Operating Principles Print Mechanism Components 107