CARRIAGE UNIT 
J001/J003 6-12  SM 
 
6.3.7 REGISTRATION SENSOR 
 
 
1. Registration Sensor 
2. Transport Belt 
3.  Paper (Leading Edge) 
 
The registration sensor is attached to the left side of the carriage. The carriage 
moves from side to side during printing.  
The registration sensor performs two important functions for print control: 
•  Detects the leading edge of every sheet 
•  Detects the width of the paper when the carriage and sensor pass horizontally 
over the vertical edge of the paper as it feeds. 
Important 
•  This is not automatic paper size detection. The paper size must be set with the 
printer driver. 
•  The printer will signal an alert if the detected size does not match the size 
selected for the print job. 
For more, see "6.7.3 Leading Edge and Paper Size Detection". 
 
G707D914.BMP
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