FENIX IMVICO
TK23 OPERATION MANUAL
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2)
Mean current:
Approx. 1.4 A
Conditions:
- Head terminal voltage = 24V
- Head resistive value Rh = 1800Ohm
- Mean energizing pulse width of 832
µ
s, synchronizing with 1667
µ
s
motor cycle.
The following formula is used to obtain the head drive current:
Imean = [V(volts)/Rh(Ohms)] x 576dots x printing ratio x [energizing pulse width/cycle]
NOTES:
(1) If the number of dots that are energized at the same time is increased, a higher
current will flow; therefore, the user should use a power supply with a current
capacity adequate for the corresponding print duty.
(2) When designing lines and bit images, take the printing ratio and print duty into
consideration.
(3) Print quality may be poor if the printing ratio or print duty is high.
(4) Definitions:
•
Printing ratio: the number of printing dots (energizing pulses)/dot line.
•
Print duty: the number of printing dots (energizing pulses)/ elements/ paper
feed amount (two steps, including non-printing area)
WARNING: Beware not to invert the polarity of power supply. This may
irremediably damage the printer.
IMPORTANT NOTE ABOUT TK23 POWER SUPPLY:
The necessary supply of power depends on the content to print on the
ticket. A 150W power supply covers all adverse possibility (printing ratio of 100%
black at any temperature). However, if the average print ratio is not over 25%, a
60W power supply can be used. Any way, power supply must meet the peaks
current that mechanism requires, which are determined by the following formula:
Ipeak = [24 / 1800] x number of printing dots
