diff --git a/Code/thermal_printer/config.h b/Code/thermal_printer/config.h
index 3e187bd..41eb67f 100644
--- a/Code/thermal_printer/config.h
+++ b/Code/thermal_printer/config.h
@@ -121,7 +121,7 @@
 
 #define ADC_FILE_PAT "/sys/bus/iio/devices/iio:device*/in_voltage_raw"
 
-#define HEAT_TIME 300 // heat time,better not greater than 1000,300-1000 0-f
+#define HEAT_TIME 100 // heat time,better not greater than 1000,300-1000 0-f
 
 #define int16               uint16_t
 #define int8                uint8_t