Thermistor always says 80ºC?

hello, i have a taurino power with rams 1.4 and all connected to 24v, but now the thermistor of the bed says always 80ºc, i switch the taurino for one ardunio that a have for replacement and all works right.
can i switch the pins in taurino and ramps to get the thermistors works in other pins that be unsused

thanks a lot and sorry for the inglish

look here:[reprap.org]

i think there is t0,t1,t2. t0=a13, t1=a14, t2=a15. map accordingly in firmware.

then also if those are bad, a3,a4,a5,a9,a10,a11,a12 are available as long as you are not using aux ports other than spi.

look at the aux ports schematic to see what analog pins are used on each port. best of luck!

Edited 1 time(s). Last edit at 04/11/2013 11:03AM by jamesdanielv.

but i dont know how to do this. i have the repetier firmware if its help

look at pins.h and configuration.h

do you know what adc pins still work?

Edited 1 time(s). Last edit at 04/11/2013 04:56PM by jamesdanielv.

hello again and thanks for your time,

i found this docs but i dont know what to do with theme. the only pin that works is T0, that says the correct temp. but the other, T1 and T2 always says 80ºc for T1 even if the thermistor is not plugged in

i down to what to do

aux-2 there are 2adc pins available if you are not using the aux-2 port, then map temp_pin_2 or heater pin to a9 or a11, and see if it works with bed heater. Also you will need either a 4.7k resistor or a 1k resistor depending on calibration table. i think the resistor is to vcc, and the thermister is to gnd. if i got it backwards you will easily find out during testing. The adc pin connect it with a wire in between the resistor and the thermister.


you will want to open up pins.h with notepad, search or find '== 34' then under those settings look at temp_2 pin. it should be an analog pin with an 'a' in front of it. change it to pin a9 or pin a11

Edited 2 time(s). Last edit at 04/11/2013 10:33PM by jamesdanielv.