Original Size Detection

Two reflective sensors [B] are used to detect the original length. The original width is detected by a 3-point pre-scan using the CCD.

The DF position sensor [A] is detecting the open/closed state of the ADF. The original length is determined when the sensor state changes from “not interrupted” to “interrupted” (when the ADF is closed). Then the machine starts pre-scanning. If the sensor state stays “not interrupted“, the detected data, that is read just after [Start] is pressed, is used as original length.