Detection Mechanism For Leading And Trailing Edges - Riso ComColor X1 series Technical Manual

Registration Section

1-7. Detection Mechanism for Leading and Trailing Edges

(1) Paper Detection
Leading and trailing edges are constantly detected by top edge sensors 1 and 2 (incorporated in the head
holder).
(2) Ink Drop Timing
Leading-edge detection data from top edge sensor 2 (reflective), installed just before the head that is most
upstream, determines the ink drop timing. If the leading edge cannot be detected by top edge sensor 2(*1),
leading-edge data from top edge sensor 1 (transmissive) determines ejection timing. Thus, leading and trailing
edges are also constantly detected by top edge sensor 1.
*1: Because a reflective sensor is used in top edge sensor 2, the following conditions may cause detection
problems.
1. Using preprinted paper that has a printed border.
2. Using colored paper.
3. Using paper with low reflectivity.
4. Duplex printing, in combination with conditions from 1 to 3 of above.
Top edge sensor 1 (send)
CIS
[ 6-10 ]
Top edge sensor 2
(reflecting type sensor)
ComColor Series (Revision 2.4)