EC Line EC-PM-80320 User Manual

EC-PM-80320 Service Manual
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4.2.1 Thermal sensor
The thermal sensor whose function is to protect the print head and the user through checking the
print head’s temperature is set on the print head.
4.2.1.1 Checking the excrescent temperature of
print head
EC-PM-80320 printer checks the excrescent temperature through soft and hardware. The print
head will stop heating the fever component when the temperature is higher than 80℃ (thermal
resistance is lower than 3.80 KΩ). The print head will reheat the fever component when the
component’s checked temperature is lower than 60℃ (thermal resistance is higher than 7.45
KΩ).The thermal head’s life will be infected seriously when the fever component is heated and its
temperature is continuously up to 80℃.
4.2.1.2 Thermal Resistance
The value of thermal resistance is determined by formula (1) at the temperature Tx (℃).
Formula (1):
Rx = R
25*EXP {B*（1/（273+Tx）-1/298）}
Rx: The value of thermal resistance at the temperature Tx（℃.
R25: 30KΩ±5% (25℃)
B: 3950±2%
Tx: Working temperature of print head.（℃）
EXP（A）:Take natural logarithm e（2.71828）
Temperature.（℃） Value（KΩ）
0 100.99
5 77.85
10 60.57
15 47.53
Figure 4-6 Relationship between value of thermal resistance and temperature

EC Line EC-PM-80320 Specifications

General

Brand	EC Line
Model	EC-PM-80320
Category	Printer
Language	English