Page setup 105

Parameters Used

Garbage, Black Mark and Out of Paper Detection

Garbage range n40

Printed black mark n39

Valid black mark range (n39 – n40 + 5mm)

5mm Constant

Out of paper

For every step the paper is fed, the black mark sensor is sampled to detect garbage, black marks or out of paper.

When the printer detects blackness it has to check if it is only garbage;

If the paper…

Then it is…

 

 

gets white again within n40 x 0.125 mm

garbage and the spot is ignored

 

 

is still black after n40 x 0.125 mm

probably a black mark

 

 

gets white within an additional n39-n40 plus 5 mm

a black mark

 

 

i

n37 &

n38

Detection

area

n39

10 mm

The 5-mm is a constant added to make sure that noise on the edge not will interfere with the samples. If it is still black at this point, then we have detected out of paper.

Important • Be careful about n40 and n39. If n39 – n40 is too small, then the minimum detection area will be too little. This area should not be less than 2 mm.

09/14/2009

TTP 2000 Technical Manual

P1002902-002