User manual

Another parameter that needs to be set is the threshold:

Notch Threshold.. : 40%

It is used to detect the presence of the notch: if the voltage value read by the sensor exceeds the threshold

value set the notch is identiﬁ ed, otherwise the white paper is considered.

In order to better identify the optimum threshold for the paper being used, a paper characterisation function is

also available in setup.

Characterize Paper. :Yes

By activating this parameter the outgoing voltage of the sensor will be presented in a graphic form as shown

in ﬁ gure B.1 below:

PAPER CHARACTERIZATION

Notch Threshold

The graphic shows the outgoing voltage of the sensor and the threshold value previously set. It is clear that

by adjusting the threshold value it is possible to ﬁ nd the best position that takes into account the signal peak

and the small oscillations around zero.

The ALIGNMENT POINT is deﬁ ned as the position inside the ticket that is the desired alignment point.

The ALIGNMENT POINT can be deﬁ ned over the notch or near this one; for this reason, the ﬁ nal param-

eters to be set in setup are:

Notch Dist. [mm x 100] : 0

Notch Dist. [mm x 10] . : 1

Notch Dist. [mm x 1] . : 5

Notch Dist. [mm x .1] . : 0

These parameters deﬁ ne the “Nocth Distance” that represents the distance from the notch to align or simply

identify the notch distance from the ticket margin; in the above example the notch distance is 15 mm.

(Fig.B.1)

APPENDIX B - ALIGNMENT MANAGEMENT

B-2 KPM150 User Manual