Quote
NoobMan
The meat thermometer probably does not show correct surface temperature, being round and surface flat etc.
The thermistor table in firmware contains one adc column and one temperature column. The firmware reads the adc value and translates it to temperature by the use of that thermistor table. You can calibrate the thermistor table manually. You can take each row, and from the table that is uploaded in firmware, set the temperature in the row, to trick the system to reach the corresponding adc value. Then you measure that point with a real life temperature tool (preferably a multimeter with a termocouple), and write that real value down for each row. Then you replace the old table temperatures with your own temperatures and do the firmware upload again. And double check etc.
Thank you for the reply! I will definitely try playing around with the table values, I had looked at that, but became confused once I started looking into generating a table based on the resistor specs, oversampler, etc.. I'll give it a shot and post back with results.
As for the meat thermometer, unfortunately it's all I have to measure temperatures that high. Attempting to have the most accuracy, the tip was laid "flat" for the most contact area on the heated block. I have been to several electric supply stores and nobody seems to have thermistors (short of buying a whole new multimeter), which I have 80 miles from here.
[attachment 37089 thermapen.jpg]
I guess my next question would be, assuming the accuracy is at least within +/- 15C, shouldn't the PLA still be melting more than just slightly? Regardless of the reading, what characteristics should I notice when the filament is touched to a "hot enough" tip?
I appreciate all of the advice!
Thank you,
-Pat