Test Pattern 3: Verca Lne Sraghness Tes
Vertical+line straightness is a measure of the horizontal distance between the segments of a vertical line plotted in two consecutive swaths. If the Printer is working correctly, this distance should be less than 2 mils (see Figure 2)
Swath Printing Direction
Swath (n±1)
Swath Printing Direction
Swath (n)
Swath Printing Direction
Swath (n+1)
Maximum allowable VLS Error = 2 mils.
Figure 2
Customer Expectations
Although the VLS specification satisfies the expectations of most customers, some may complain even when the Printer is working within this specification. If the VLS error is already less than 2 mils, do not try to improve it.
The VLS error is composed of two parts (see Figure 3):
Theta+Zeta error
Bidirectional error
Figure 3
Print Quality | HP DesignJet 430, 450C and 455CA Printers |