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Sprinter/Marlin Temperature Tables

Posted by lincomatic2 
Sprinter/Marlin Temperature Tables
March 02, 2012 04:13AM
I noticed that the values in thermistor.h of Sprinter and Marlin are different from the ones created by the included createTemperatureLookup.py.
There's a definition for a 100K EPCOS, but it doesn't say which model. I have the B57560G1104F. Where can I obtain the appropriate temperature table data? It would be nice to know how to generate the values, too. TIA
Re: Sprinter/Marlin Temperature Tables
May 16, 2012 02:25AM
I got this from a dutch forum(http://3dprinterbouwpakket.nl/):

for B57560G104F:

Tempertature Table:
// r0: 100000
// t0: 25
// r1: 0
// r2: 4700
// beta: 3974
// max adc: 1023
#define NUMTEMPS 20
short temptable[NUMTEMPS][2] = {
{1, 916},
{54, 265},
{107, 216},
{160, 189},
{213, 171},
{266, 157},
{319, 146},
{372, 136},
{425, 127},
{478, 118},
{531, 110},
{584, 103},
{637, 95},
{690, 88},
{743, 80},
{796, 71},
{849, 62},
{902, 50},
{955, 34},
{1008, 2}
};
Re: Sprinter/Marlin Temperature Tables
May 17, 2012 04:33AM
If you manage to make your own temperature table, use that. For extra accuracy, measure the 4k7 resistor before doing so. Because it's 4k7 +-5% and you want the value of your specific one there.


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