Epson expression 1640xl 用户手册

If you need to adjust the document guide angle, you first need to determine which 
way to adjust it and by how much. For example, in the example shown above:

The adjusting angle = (scale A - scale B) / 4

If scale A starts at line 0, then 0 

×

 0.4 = 0; the value for 

scale A = 0

If scale B starts at line 2, then 2 

×

 0.4 = 0.8; the value for 

scale B = 0.8

(0 - 0.8)/4 = -0.2

In this example, the angle you need to adjust the adjust pin is -0.2

To adjust the angle:

1. Use a screwdriver to turn the adjust pin to 

the number you calculated (-0.2 in the 
previous example).

2. To confirm the angle, repeat the steps 

under “Scanning with the Document 
Guide.” Once you’ve confirmed the 
angle, it’s a good idea to write it down for 
future reference.