I'm using two thermocouplers
(Marlin option #-1) for the two hot ends, but a thermistor
(EPCOS B57560G104F, Marlin option #1) for the heat bed.
I get 0c from the heat bed, the thermistor is 100k and it's resistance is between 85-90 indoors. I have tried every thermistor table in configuration.h and it gives 0c or 300c. If I short the pins on the RAMPS I will see the temp spiking all the way up to 300c
The hot end thermocouplers were a royal pain to calibrate, I had to change Configuration_adv.h to have:
#define TEMP_SENSOR_AD595_GAIN 0.65
since they reported to high value.
I'm thinking that this should not impact the heat bed since I have this in configuration.h:
#define TEMP_SENSOR_0 -1
#define TEMP_SENSOR_1 -1
#define TEMP_SENSOR_2 0
#define TEMP_SENSOR_BED 1
I'm not sure if having thermocouplers and thermistor in combination causes problems to the temp table ranges, since a thermocoulper is linear, and a thermistor is not and therefor needs a table.
Is there a limitation so that you can not have multiple thermistor/thermocoupler tables active at the same time?
I'm Using RAMPS 1.4, latest Marlin, EPCOS B57560G104F thermistor, thermocoupler with AD597.
Help!!!! 8\
Edited 1 time(s). Last edit at 04/17/2014 08:20PM by AWESOM-O.
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