LTPH245 datasheet(35/64 Pages) SII

Il numero della parte	LTPH245

Spiegazioni elettronici	LINE THERMAL PRINTER MECHANISM TECHNICAL REFERENCE

PDF	64 Pages

Scroll/Zoom	100%

Produttore elettronici	SII [Seiko Instruments Inc]

Homepage	http://www.sii.co.jp

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35 / 64 page

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3.6.7

Heat Storage Coefficient

In high speed printing, a difference in temperature arises between the rise in temperature of the thermal

head due to head activation and the temperature detected by the thermistor. Therefore, the activation

pulse must be corrected by simulating a rise in the temperature of the thermal head.

No correction is needed when the print ratio is low. When correction is not needed, set “1” as the heat

storage coefficient.

The heat storage coefficient is calculated as follows:

Prepare the heat storage software counters to simulate heat storage.

(a) Heat storage due to head activation

The heat storage counter counts up in each print period as follows.

T’=T+

T : Heat storage counter value

N : Number of the activated dots

(b) Radiation

The heat storage counter value is multiplied by the radiation coefficient in each 2 msec.

T’=T

×K

K : Radiation coefficient 0.996

Calculate the heat storage coefficient with the following equation (9).

Equation (9)

D=1-

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LTPH245 Scheda tecnica(PDF) 35 Page - Seiko Instruments Inc