Epson TK14 operation manual Gnd, Important Note about Power Supply

FENIX IMVICO TK14 OPERATION MANUAL

2.2- POWER SUPPLY

The TK14 is powered by an external power supply by means of a female polarized connector of 4 pins that includes a security anchor. The power supply voltage must be verified before making the connection between the supply and the printer.

The power supply male connector must be a JST VH396-04-H(housing)

VH396T-010(contact), or an equivalent model.

+12V to +24V

GND

Fig. 2.4- TK14 power supply connector.

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 an adequate current capacity.

(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 (energizing pulses/dot line) or print duty is high.

(3) Average energizing pulse width is defined as 64 of 192 dots/dot line that are energized.

WARNING: Beware not to invert the polarity of power supply. This may irremediably damage the printer. Use the 4 terminals (4 wires) with 1 mm² minimum section everyone.

IMPORTANT NOTE ABOUT POWER SUPPLY:

The necessary supply of power depends on the content to print on the ticket. A 60W power supply covers all adverse possibility (printing ratio of 100% black at any temperature). However, if the print ratio is not over 60%, a 40W 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 = [(number of printing dots) x 8,3] / 176 [A]

Rshunt=0,02 Ω

Vi=12V

Ipeak = 3,9A

Istandby = 0,38A

1 dot line

2 dot lines

Ipeak = 5,1A (5ms)

Input current

Ipeak= 2,2A ( 40ms)

I(motor) = 0,5 A

(feed paper without printing)

Fig. 2.5- Current consumption example.

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