KERN & SOHN VFS 2T1 Addendum - Manual (Page 9)

EPM205 - Technical reference - Rev. A Page 9
Advanced Printing Systems
3.4. Maximum conditions at 25°C
Maximum conditions Item
LV HS
Unit
Supply energy 0.26 0.2 mJ/dot
Print cycle 2.5 1.25 ms/line
Supply voltage 7.2 8.5 V
Logic voltage 7 V
Head temperature 65 °C
Number of dots to be energized
simultaneously 1
192 dots
Notes:
· If energy applied to one dot, exceed the maximum value indicated on the above table, the print quality of
this dot may be definitively affected (usually makes a “light” print-out).
· If print cycle is less than 2.5 ms/line (above 50 mm/s) then maximum supply energy value is decreased.
For these applications, please contact A.P.S. for more information.
· When using double-ply paper or special low energy paper, please contact A.P.S. for more information.
3.5. Typical printing conditions
Electrical conditions Item Symbol
LV HS
Unit
Supply voltage VH 3.6 7.2 V 64 dots fired
Power consumption Po 0.07 0.24 W/dot at the same time
Print cycle S.L.T. 2.5 1.25 ms/line
Eo 0.17 0.16 mJ/dot
Energy consumption Ton 2.28 0.67 ms
5 °C
and ON Time at Eo 0.15 0.13 mJ/dot
different working Ton 2.01 0.54 ms
25 °C
temperatures Eo 0.13 0.11 mJ/dot
Ton 1.74 0.46 ms
45 °C
Supply current Io 1.6 2.4 A
The print optical density is then 1.0 minimum with a maximum variation of 0.3. This measurement is done
at the full black pattern by Macbeth densitometer RD-914. Full black pattern is defined as all dots printing
pattern (100% black area) printed under correct paper speed.
1 This condition satisfies the print density as defined in section 3.5