e3d pt100 radds and repetier - temps to low
Hi Guys,
I use the e3d pt100 in combination with the radds board. My problem is, that the tempsvalue are to low. At 21° C room temperature the display shows 1° C and the bed 21°. So the reading of the pt100 is to low. When i than heat the nozzel up the temps are rising but it seems like the showen temp is much lower than the real one of the nozzle. Can i adjust that or do something else?
best reagards
Cai
I use the e3d pt100 in combination with the radds board. My problem is, that the tempsvalue are to low. At 21° C room temperature the display shows 1° C and the bed 21°. So the reading of the pt100 is to low. When i than heat the nozzel up the temps are rising but it seems like the showen temp is much lower than the real one of the nozzle. Can i adjust that or do something else?
best reagards
Cai
Comments
best regards
cai
case 61: // AD8495 1.25V Vref offset (like Adafruit 8495 breakout board)
#if CPU_ARCH == ARCH_AVR
currentTemperatureC = ((float)currentTemperature * 1000.0f / (1024 << (2 - ANALOG_REDUCE_BITS))) - 250.0f;
#else
currentTemperatureC = ((float)currentTemperature * 660.0f / (1024 << (2 - ANALOG_REDUCE_BITS))) - 250.0f;
#endif
But PT100 is a fixed PTC. Here the question is did you use the e3d ampilfier and where did you connect it to? The thermocouple pins are in series with 4.7k resistor so you can not use them. You need the analog input at the long side for this.Best regards