misan Wrote: ------------------------------------------------------- > buZztiaan: > > 0) Make sure your Arduino IDE is configured to the > right type of board (Mega1280, right?) yeah 1280 > 1) what is the voltage measured from GND to analog > pin 13 4.55 > 2) what is the voltage measured from +5 to GND 4.73 > 3) what is the value your software is giving for > anby buZztiaan - General
Well, i've rebuild the circuit Just like this : +5V -> 4.7K Ohm -> -> Thermistor -> GND And _STILL_ Sprinter is giving me T:0 ...by buZztiaan - General
modmaker Wrote: ------------------------------------------------------- > A problem that remained was the analog signal from > the thermistor. Although I was sure the connection > was ok, the software did not read the configured > input. This proved to be a software problem and an > easy workaround was found. any chance of getting a patch for just this fix? I'm finding the same prby buZztiaan - Firmware - experimental, borrowed, and future
Same here... I'm considering rebuilding the circuit around analog pin 13 on a breadboard with the same two softwares, checking to see if there is a difference. Wondering if i have the partsby buZztiaan - General
Well, on recommendation of Kliment, I just added 5V to the PCB from an external power source. But still T:0 >_<by buZztiaan - General
I just tried putting a jumper on T0 , and that worked! T:357 is reported by pronterface now .. I wonder why this works, and a 55KOhm doesnt ..by buZztiaan - General
Exactly the same result with THERMISTORHEATER set to 1by buZztiaan - General
Just grabbed fresh git of Sprinter, changed MOTHERBOARD to 33 and THERMISTORHEATER to 5 But still the same T:0 B:0 replyby buZztiaan - General
misan Wrote: ------------------------------------------------------- > Zero temp measurement use to mean a thermistor is > not well connected (or connected to the wrong > input). Well, my test firmware (above) is working ... when i heat it up it starts to drop .. > Are you sure MOTHERBOARD is configured to 33 > (RAMPS) on your firmware configure.h? Yes, 100% sure I also changedby buZztiaan - General
Well, I just replaced the thermistor with a known value resistor (55KOhm) In my test firmware i get '950' from the analogRead(13) But in Sprinter it still says '0' I'll post my code here for reference : int val = 0; void setup() { pinMode(10, OUTPUT); Serial.begin(115200); } void loop() { val = analogRead(13); Serial.println(val); // I used this part to 'bake' my fire cement , the 444by buZztiaan - General
Nudel Wrote: ------------------------------------------------------- > Congratulations, and welcome! Tnx and hi > Here's a few pointers: > Can you move the motors, so you are sure you have a working connection to the printer? Yeah all 4 the axis are moving back & forth (X Y Z and E) > You have updated your thermistor table, and not set the firmware to use a thermocouple by aby buZztiaan - General
Hiya, just built my first printer (weeeeeee) BUT The thermistor keeps outputting 0 through Sprinter or Marlin My setup is ; arduino mega 1280, RAMPS v1.3, arcol hotend v4 The main weird thing is that when i write a small arduino sketch doing analogRead(13) (the pin for T0) and just write it over serial, i DO get valid values from the thermistor. But when i let Sprinter or Marlin do the same,by buZztiaan - General