Canon imagePROGRAF iPF670 Service Manual page 82

Chapter 2
Carriage
Spring (for Printhead Height)
Slant Adjustment Lever
Spring (for Printhead Slant)
Slant Adjustment Lever Shaft
Spring (for Printhead Slant)
Carriage Height Changing Cam
Head Holder
Lift Cam Sensor
Lift Motor
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f) Carriage height adjustment unit
The head height is adjusted with the carriage halted at its home position.
The lift motor is driven to rotate the carriage height changing cam within the carriage, in sync with which the lift cams on both sides of the carriage move the head
holder up and down, thereby varying the separation between the face of the printhead and the paper.
The printhead height is detected from the lift cam sensor within the carriage and the distance of rotation of the lift motor.
g) Slant adjustment unit
The tilting of the head is adjusted with the slant adjustment lever.
The point where the slant adjustment lever axis touches the head holder is offset from the fulcrum of the lever axis. Therefore, the printhead is tilted by moving the
slant adjustment lever and moving the position on the right side of the head holder back or forward.
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