This table is made for thermistor 3950 (can be found on ebay for cheap)
it's caracteristics are :
R25℃ ;100KΩ±1%
B Value(R25/50℃):3990K 1%
Dissipation Factor(mW/℃):1.1~1.6 In still Air
Thermal Time Constant(S):10~17 In Still Air
Operating temperature range: (-50~+260°C)
Dimension: 1.8mm Dia X4.1mm
Lead Length :30mm
This table was found on the following blogs:
http://cae2100.wordpress.com/2014/03/08/beta3950-thermistor-table-for-marlin/
and
http://microfabricator.com/articles/view/id/531ad7e59a/beta-3950-thermistor-table-for-marlin
Big temperature code update. No longer converts back and forwards between temperature and raw sample value. Reducing complexity, removing code. Also named some variables better. While keeping the safety intact and functionality the same.
repaired thermistortable_6 by graphcial fitting of the off-slope values. see issue 179. Erik, I know you asked for no changes, but this file probably is not related and hopefully allright.
- The temperature control is pretty much complete
(not sure what to do w/ autotemp though)
Changed the pins assignment to clearly separate bed and extruder heaters
and temp sensors, changed a bit how termistor tables are handled.
- The steppers control is rudimentary
(only chanages what pins it uses depending on the active_extruder var,
but that's enough for switching extruder in the start.gcode in the
the profiles)
- Tested only w/ RAMPS 1.4