Paper Size Detection Mechanism - Riso ComColor X1 series Technical Manual

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1-6. Paper Size Detection Mechanism

Paper size is detected by the following two methods.

1. Paper Transfer System: Paper length is detected by the timing of activation and deactivation of top edge sensor 1.

Paper size detection

Although the paper size is detected when paper is loaded in the internal paper feed tray, if the paper length

detection sensor is triggered by incorrectly set feed tray paper guides or objects other than paper placed in the

paper feed tray, the system misinterprets this, treating it as if the paper is larger than the paper actually loaded.

Because printing at that wrong paper size occurs if paper is transferred after incorrect detection, the belt may

become soiled.

For this reason, the paper length is also detected in the paper transfer system. In the paper transfer system, paper

length is detected by the timing of activation and deactivation of top edge sensor 1. If different sizes are detected

in the system and the paper transfer section and the difference exceeds a particular range, the speed is controlled

based on the paper size detected in the paper transfer section.

Type of paper

The pattern formed by four interrupt type sensors (the pattern of ON and OFF sensors)

enables detection of the paper size. These sensors work on a principle of the shield

plate sliding from the end paper guide on a structure incorporating links and gears.

Direction of tray removal

Type of paper

External paper

Paper transfer system

etection pattern

ensor layo t

Top edge sensor 1

Paper length calculated from the timing

between activation and deactivation

Paper size detection

ComColor Series (Revision 2.4)

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