B57560G1104F value range ?!?

Hello,
I'm on the market for new thermistors and I came across this one B57560G1104F.
But some websites says it goes up to 200°C others 300°C. I can't seem to find the info on the data sheet. In marlin it says the value is :
{1, 821},
{54, 252},
{107, 207},

There seems to be some value after 252°C, but not many.

I run relatively high temperatures, so 300°C is a must for safety.

Or is there another one I missed that is good?

Thanks for the helps guys!
Cheers

Why don't you consider using a thermocouple? Instead of trying something that is not so known and maybe won't work?

I have considered it, I am still researching the available thermocouples on the market. I'm also trying to figure on my own how to interface thermocouples with marlin, as most people of thermistors.

The thing is I know it works, I am currently running some of EPCOS on my machine at 260°C with no problems. I was just wondering if the values were correct and if I am damaging the sensors at that temperature range.

Good question, are you using RAMPS 1.4?

Then there is an expansion board needed, but it's just a small thing, like this one:
[reprapworld.com]

The megatronics already have a thermocouple-compatible connection somewhere.

I hope someone can help you further!

The 57560 is good up to 300 C per the datasheet at [www.mouser.com]


You could plug in a few values off of pages 5 & 6 of that into the [github.com] program and get more values for the lookup table if you want.

Below is the output from the patch using [github.com] -- The resolution up around 260C starts getting big. You might want to use a smaller pullup.

$ ./createTemperatureLookupMarlin.py --rp=4700 --t1=25:100000 --t2=150.0:1641.90 --t3=250.0:226.15 --num-temps=36
// Thermistor lookup table for Marlin
// ./createTemperatureLookupMarlin.py --rp=4700 --t1=25.0:100000.0 --t2=150.0:1641.9 --t3=250.0:226.15 --num-temps=36
// Steinhart-Hart Coefficients: 0.000722136308968056, 0.000216766566488498, 8.92935804531095e-08
// #define NUMTEMPS 36
const short temptable[NUMTEMPS][2] PROGMEM = {
{(short)(12.29*OVERSAMPLENR), 350}, // v=0.0599958432441 r=57.0810174039 res=6.73322398125 C/count
{(short)(13.81*OVERSAMPLENR), 340}, // v=0.0674271313837 r=64.2479140085 res=5.84784873117 C/count
{(short)(15.57*OVERSAMPLENR), 330}, // v=0.0760468961176 r=72.588102326 res=5.05762627971 C/count
{(short)(17.63*OVERSAMPLENR), 320}, // v=0.086083263711 r=82.3358150239 res=4.35552990514 C/count
{(short)(20.03*OVERSAMPLENR), 310}, // v=0.0978146002296 r=93.7803415392 res=3.73464935111 C/count
{(short)(22.85*OVERSAMPLENR), 300}, // v=0.111581711837 r=107.280927024 res=3.18823906869 C/count
{(short)(26.17*OVERSAMPLENR), 290}, // v=0.127803155871 r=123.286240645 res=2.70976192797 C/count
{(short)(30.10*OVERSAMPLENR), 280}, // v=0.146994423719 r=142.359983029 res=2.29292790318 C/count
{(short)(34.77*OVERSAMPLENR), 270}, // v=0.169791888014 r=165.214801343 res=1.93172738284 C/count
{(short)(40.34*OVERSAMPLENR), 260}, // v=0.196982509003 r=192.757530875 res=1.62045890553 C/count
{(short)(47.01*OVERSAMPLENR), 250}, // v=0.229540310384 r=226.15 res=1.35375126639 C/count
{(short)(55.02*OVERSAMPLENR), 240}, // v=0.268670456022 r=266.891395233 res=1.12658007687 C/count
{(short)(64.69*OVERSAMPLENR), 230}, // v=0.315861195704 r=316.930749031 res=0.93427898825 C/count
{(short)(76.38*OVERSAMPLENR), 220}, // v=0.372942680546 r=378.82188993 res=0.772545908014 C/count
{(short)(90.55*OVERSAMPLENR), 210}, // v=0.442149166623 r=455.938809561 res=0.637444648234 C/count
{(short)(107.76*OVERSAMPLENR), 200}, // v=0.526176675155 r=552.777835346 res=0.525402550991 C/count
{(short)(128.66*OVERSAMPLENR), 190}, // v=0.628220773075 r=675.385805227 res=0.433204743933 C/count
{(short)(154.00*OVERSAMPLENR), 180}, // v=0.751967783069 r=831.973111301 res=0.357985800697 C/count
{(short)(184.63*OVERSAMPLENR), 170}, // v=0.901497141854 r=1033.80105208 res=0.297219733252 C/count
{(short)(221.40*OVERSAMPLENR), 160}, // v=1.08103489187 r=1296.48104834 res=0.248709453792 C/count
{(short)(265.11*OVERSAMPLENR), 150}, // v=1.29448587963 r=1641.9 res=0.210577156194 C/count
{(short)(316.35*OVERSAMPLENR), 140}, // v=1.54468172718 r=2101.11009885 res=0.181257552281 C/count
{(short)(375.26*OVERSAMPLENR), 130}, // v=1.83233973384 r=2718.72487118 res=0.159496673993 C/count
{(short)(441.32*OVERSAMPLENR), 120}, // v=2.15486106919 r=3559.70209943 res=0.144360218422 C/count
{(short)(513.09*OVERSAMPLENR), 110}, // v=2.50529934206 r=4719.96785273 res=0.135257513327 C/count
{(short)(588.19*OVERSAMPLENR), 100}, // v=2.8720173941 r=6343.32334993 res=0.131990724404 C/count
{(short)(663.46*OVERSAMPLENR), 90}, // v=3.23954309438 r=8648.80730393 res=0.134845009808 C/count
{(short)(735.39*OVERSAMPLENR), 80}, // v=3.59077045597 r=11975.7786903 res=0.144745979803 C/count
{(short)(800.77*OVERSAMPLENR), 70}, // v=3.90999942821 r=16859.6217179 res=0.163529887659 C/count
{(short)(857.24*OVERSAMPLENR), 60}, // v=4.18576571724 r=24161.4720574 res=0.194406990866 C/count
{(short)(903.67*OVERSAMPLENR), 50}, // v=4.41243186352 r=35295.3614583 res=0.242764755572 C/count
{(short)(940.06*OVERSAMPLENR), 40}, // v=4.59012968466 r=52635.208529 res=0.317587426222 C/count
{(short)(967.35*OVERSAMPLENR), 30}, // v=4.72340657421 r=80262.2507571 res=0.434034538851 C/count
{(short)(987.00*OVERSAMPLENR), 20}, // v=4.81933421119 r=125374.432768 res=0.618297799926 C/count
{(short)(1000.61*OVERSAMPLENR), 10}, // v=4.8857673165 r=201020.45828 res=0.917203742862 C/count
{(short)(1009.69*OVERSAMPLENR), 0} // v=4.93011523809 r=331567.869539 res=1.41851985582 C/count
};

Edited 2 time(s). Last edit at 01/30/2014 12:54AM by DaveX.

Thanks!
I am using an Azteeg X3. It has two thermocouples, perfect for dual extrusion; the heated bed can have a thermistor.

Thanks for the pdf Dave; but as you can see, the pdf says 300°C and mouser says 200°C.

I'll go with what the pdf says.

Thanks again for the help.