Where do I store a custom thermistor table This is the data I received for my hotend thermistor: TEWA Thermistor lookup Table: #if (THERMISTORHEATER == 1) || (THERMISTORBED == 1) //TEWA NTC 100K #define NUMTEMPS_1 47 const short temptable_1[NUMTEMPS_1][2] = { {22, 300}, {30, 270}, {33, 265}, {36, 260}, {39, 255}, {42, 250}, {47, 245}, {51, 240}, {56, 235}, {63, 230}, {69, 225}, {74, 220}, {81, 215}, {90, 210}, {98, 205}, {107, 200}, {119, 195}, {129, 190}, {142, 185}, {156, 180}, {171, 175}, {187, 170}, {204, 165}, {224, 160}, {245, 155}, {271, 150}, {297, 145}, {321, 140}, {351, 135}, {370, 130}, {402, 125}, {451, 120}, {502, 115}, {533, 110}, {551, 105}, {570, 100}, {610, 95}, {661, 90}, {731, 80}, {801, 70}, {856, 60}, {901, 50}, {950, 40}, {977, 30}, {991, 20}, {1003, 10}, {1011, 0} //safety }; #endif THERMISTOR TEWA NTC 100k 1% Operating temperature : -40°C ~ +300°C Tolerance: 1% NTC thermistor sealed in Glass Body TEWA TT2-100KC3H-7 Beta Constant: 4066 Now do I just have to copy and paste that to configuration.h ? I wonder because I see no other table there: (from my Marlin->configuration.h) //=========================================================================== //=============================Thermal Settings ============================ //=========================================================================== // //--NORMAL IS 4.7kohm PULLUP!-- 1kohm pullup can be used on hotend sensor, using correct resistor and table // //// Temperature sensor settings: // -2 is thermocouple with MAX6675 (only for sensor 0) // -1 is thermocouple with AD595 // 0 is not used // 1 is 100k thermistor - best choice for EPCOS 100k (4.7k pullup) // 2 is 200k thermistor - ATC Semitec 204GT-2 (4.7k pullup) // 3 is mendel-parts thermistor (4.7k pullup) // 4 is 10k thermistor !! do not use it for a hotend. It gives bad resolution at high temp. !! // 5 is 100K thermistor - ATC Semitec 104GT-2 (Used in ParCan) (4.7k pullup) // 6 is 100k EPCOS - Not as accurate as table 1 (created using a fluke thermocouple) (4.7k pullup) // 7 is 100k Honeywell thermistor 135-104LAG-J01 (4.7k pullup) // 71 is 100k Honeywell thermistor 135-104LAF-J01 (4.7k pullup) // 8 is 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup) // 9 is 100k GE Sensing AL03006-58.2K-97-G1 (4.7k pullup) // 10 is 100k RS thermistor 198-961 (4.7k pullup) // 60 is 100k Maker's Tool Works Kapton Bed Thermister // // 1k ohm pullup tables - This is not normal, you would have to have changed out your 4.7k for 1k // (but gives greater accuracy and more stable PID) // 51 is 100k thermistor - EPCOS (1k pullup) // 52 is 200k thermistor - ATC Semitec 204GT-2 (1k pullup) // 55 is 100k thermistor - ATC Semitec 104GT-2 (Used in ParCan) (1k pullup) #define TEMP_SENSOR_0 1 #define TEMP_SENSOR_1 0 #define TEMP_SENSOR_2 0 #define TEMP_SENSOR_BED 0 https://reprap.org/forum/read.php?146,268508,268508#msg-268508 Tue, 08 Sep 2026 05:55:16 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?146,268508,300162#msg-300162 Re: Where do I store a custom thermistor table https://reprap.org/forum/read.php?146,268508,300162#msg-300162
Marlin reads the thermistor ADC 16 times and adds them up before interpolating between the left-hand values.]]> DaveX Firmware - mainstream and related support Fri, 24 Jan 2014 00:48:22 -0500 https://reprap.org/forum/read.php?146,268508,295413#msg-295413 Re: Where do I store a custom thermistor table https://reprap.org/forum/read.php?146,268508,295413#msg-295413
Quote
jbernardis
I don't know the arguments on one over the other. I guess it comes down to a shorter table takes less memory and is faster to search. The tradeoff is a loss of resolution, but it might not be so bad.
I guess I could see how much the main one takes up but considering the Arduino will only be used for this memory may not be that much of an issue.]]> Dark Alchemist Firmware - mainstream and related support Wed, 15 Jan 2014 17:51:55 -0500 https://reprap.org/forum/read.php?146,268508,295408#msg-295408 Re: Where do I store a custom thermistor table https://reprap.org/forum/read.php?146,268508,295408#msg-295408 jbernardis Firmware - mainstream and related support Wed, 15 Jan 2014 17:47:02 -0500 https://reprap.org/forum/read.php?146,268508,295280#msg-295280 Re: Where do I store a custom thermistor table https://reprap.org/forum/read.php?146,268508,295280#msg-295280
Quote
jbernardis
The thermistor tables themselves are, oddly enough, in a file named thermistortables.h.

You can actually over-write any table that is there, or add your own. Just make sure then the variable name agrees with the number you specify in configuration.h - that is if you specify 99 in config.h, name your table temptable_99. You might also want to surround it with the #if - #endif statements you see checking for your table numbers, but if you are never going to distribute the file, it's probably a bit easier to make the compilation unconditional by omitting these lines.

If you are going to over-write a table, make sure it is not the same number table that you might be using for some other thermistor

EDIT - I see the code you have already is written to replace table 1. This is fine as long as 1) you do not use the original table 1 for any other heater, and 2) you remove the original table 1 so that you don't end up with 2 temptable_1 declarations in the code. This will cause a compilation error.
Do I go ahead and use every value in the pdf? Someone mentioned every other one.]]> Dark Alchemist Firmware - mainstream and related support Wed, 15 Jan 2014 15:14:55 -0500 https://reprap.org/forum/read.php?146,268508,295268#msg-295268 Re: Where do I store a custom thermistor table https://reprap.org/forum/read.php?146,268508,295268#msg-295268
You can actually over-write any table that is there, or add your own. Just make sure then the variable name agrees with the number you specify in configuration.h - that is if you specify 99 in config.h, name your table temptable_99. You might also want to surround it with the #if - #endif statements you see checking for your table numbers, but if you are never going to distribute the file, it's probably a bit easier to make the compilation unconditional by omitting these lines.

If you are going to over-write a table, make sure it is not the same number table that you might be using for some other thermistor

EDIT - I see the code you have already is written to replace table 1. This is fine as long as 1) you do not use the original table 1 for any other heater, and 2) you remove the original table 1 so that you don't end up with 2 temptable_1 declarations in the code. This will cause a compilation error.]]> jbernardis Firmware - mainstream and related support Wed, 15 Jan 2014 14:53:01 -0500 https://reprap.org/forum/read.php?146,268508,295232#msg-295232 Re: Where do I store a custom thermistor table https://reprap.org/forum/read.php?146,268508,295232#msg-295232 Dark Alchemist Firmware - mainstream and related support Wed, 15 Jan 2014 13:33:02 -0500 https://reprap.org/forum/read.php?146,268508,268508#msg-268508 Where do I store a custom thermistor table https://reprap.org/forum/read.php?146,268508,268508#msg-268508 This is the data I received for my hotend thermistor:


TEWA Thermistor lookup Table:

#if (THERMISTORHEATER == 1) || (THERMISTORBED == 1) //TEWA NTC 100K
#define NUMTEMPS_1 47
const short temptable_1[NUMTEMPS_1][2] = {
{22, 300},
{30, 270},
{33, 265},
{36, 260},
{39, 255},
{42, 250},
{47, 245},
{51, 240},
{56, 235},
{63, 230},
{69, 225},
{74, 220},
{81, 215},
{90, 210},
{98, 205},
{107, 200},
{119, 195},
{129, 190},
{142, 185},
{156, 180},
{171, 175},
{187, 170},
{204, 165},
{224, 160},
{245, 155},
{271, 150},
{297, 145},
{321, 140},
{351, 135},
{370, 130},
{402, 125},
{451, 120},
{502, 115},
{533, 110},
{551, 105},
{570, 100},
{610, 95},
{661, 90},
{731, 80},
{801, 70},
{856, 60},
{901, 50},
{950, 40},
{977, 30},
{991, 20},
{1003, 10},
{1011, 0} //safety
};
#endif


THERMISTOR TEWA NTC 100k 1%
Operating temperature : -40°C ~ +300°C
Tolerance: 1%
NTC thermistor sealed in Glass Body
TEWA TT2-100KC3H-7
Beta Constant: 4066

Now do I just have to copy and paste that to configuration.h ?
I wonder because I see no other table there:

(from my Marlin->configuration.h)

//===========================================================================
//=============================Thermal Settings ============================
//===========================================================================
//
//--NORMAL IS 4.7kohm PULLUP!-- 1kohm pullup can be used on hotend sensor, using correct resistor and table
//
//// Temperature sensor settings:
// -2 is thermocouple with MAX6675 (only for sensor 0)
// -1 is thermocouple with AD595
// 0 is not used
// 1 is 100k thermistor - best choice for EPCOS 100k (4.7k pullup)
// 2 is 200k thermistor - ATC Semitec 204GT-2 (4.7k pullup)
// 3 is mendel-parts thermistor (4.7k pullup)
// 4 is 10k thermistor !! do not use it for a hotend. It gives bad resolution at high temp. !!
// 5 is 100K thermistor - ATC Semitec 104GT-2 (Used in ParCan) (4.7k pullup)
// 6 is 100k EPCOS - Not as accurate as table 1 (created using a fluke thermocouple) (4.7k pullup)
// 7 is 100k Honeywell thermistor 135-104LAG-J01 (4.7k pullup)
// 71 is 100k Honeywell thermistor 135-104LAF-J01 (4.7k pullup)
// 8 is 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup)
// 9 is 100k GE Sensing AL03006-58.2K-97-G1 (4.7k pullup)
// 10 is 100k RS thermistor 198-961 (4.7k pullup)
// 60 is 100k Maker's Tool Works Kapton Bed Thermister
//
// 1k ohm pullup tables - This is not normal, you would have to have changed out your 4.7k for 1k
// (but gives greater accuracy and more stable PID)
// 51 is 100k thermistor - EPCOS (1k pullup)
// 52 is 200k thermistor - ATC Semitec 204GT-2 (1k pullup)
// 55 is 100k thermistor - ATC Semitec 104GT-2 (Used in ParCan) (1k pullup)

#define TEMP_SENSOR_0 1
#define TEMP_SENSOR_1 0
#define TEMP_SENSOR_2 0
#define TEMP_SENSOR_BED 0]]> maboo Firmware - mainstream and related support Sun, 17 Nov 2013 17:44:39 -0500