From 918e3be84cbeee38d47c8529ec97ed6702f9ea34 Mon Sep 17 00:00:00 2001
From: Michael Moon <triffid.hunter@gmail.com>
Date: Thu, 24 Mar 2011 11:06:04 +1100
Subject: [PATCH] include thermistor tables, most users seem to have similar
 thermistors so we can safely provide a default

---
 .gitignore                 |  1 -
 ThermistorTable.h          | 41 ++++++++++++++++++++++++++++++++++++++
 extruder/ThermistorTable.h | 41 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 82 insertions(+), 1 deletion(-)
 create mode 100644 ThermistorTable.h
 create mode 100644 extruder/ThermistorTable.h

diff --git a/.gitignore b/.gitignore
index 8344773..c204306 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,5 @@
 temporal.png
 temporal_data
 config.h
-ThermistorTable.h
 sim
 doc
diff --git a/ThermistorTable.h b/ThermistorTable.h
new file mode 100644
index 0000000..f21b24f
--- /dev/null
+++ b/ThermistorTable.h
@@ -0,0 +1,41 @@
+// default thermistor lookup table
+// Thermistor lookup table, generated with --num-temps=50 and trimmed in lower temperature ranges.
+// You may be able to improve the accuracy of this table in various ways.
+//   1. Measure the actual resistance of the resistor. It's "nominally" 4.7K, but that's ± 5%.
+//   2. Measure the actual beta of your thermistor:http://reprap.org/wiki/MeasuringThermistorBeta
+//   3. Generate more table entries than you need, then trim down the ones in uninteresting ranges. (done)
+// In either case you'll have to regenerate this table, which requires python, which is difficult to install on windows.
+// Since you'll have to do some testing to determine the correct temperature for your application anyway, you
+// may decide that the effort isn't worth it. Who cares if it's reporting the "right" temperature as long as it's
+// keeping the temperature steady enough to print, right?
+// ./createTemperatureLookup.py --r0=100000 --t0=25 --r1=0 --r2=4700 --beta=4066 --max-adc=1023
+// r0: 100000
+// t0: 25
+// r1: 0
+// r2: 4700
+// beta: 4066
+// max adc: 1023
+#define NUMTEMPS 20
+// {ADC, temp*4 }, // temp
+uint16_t temptable[NUMTEMPS][2] PROGMEM = {
+   {1, 3364}, // 841.027617469 C
+   {21, 1329}, // 332.486789769 C
+   {41, 1104}, // 276.102666373 C
+   {61, 987}, // 246.756060004 C
+   {81, 909}, // 227.268080588 C
+   {101, 851}, // 212.78847342 C
+   {121, 805}, // 201.30176775 C
+   {141, 767}, // 191.787692666 C
+   {161, 734}, // 183.662212795 C
+   {181, 706}, // 176.561442671 C
+   {201, 680}, // 170.244089549 C
+   {221, 658}, // 164.542298163 C
+   {241, 637}, // 159.33475843 C
+   {321, 567}, // 141.921298995 C
+   {381, 524}, // 131.166509425 C
+   {581, 406}, // 101.561865389 C
+   {781, 291}, // 72.9710018071 C
+   {881, 219}, // 54.8051659223 C
+   {981, 93}, // 23.4825243529 C
+   {1010, 1} // 0.498606463441 C
+};
diff --git a/extruder/ThermistorTable.h b/extruder/ThermistorTable.h
new file mode 100644
index 0000000..f21b24f
--- /dev/null
+++ b/extruder/ThermistorTable.h
@@ -0,0 +1,41 @@
+// default thermistor lookup table
+// Thermistor lookup table, generated with --num-temps=50 and trimmed in lower temperature ranges.
+// You may be able to improve the accuracy of this table in various ways.
+//   1. Measure the actual resistance of the resistor. It's "nominally" 4.7K, but that's ± 5%.
+//   2. Measure the actual beta of your thermistor:http://reprap.org/wiki/MeasuringThermistorBeta
+//   3. Generate more table entries than you need, then trim down the ones in uninteresting ranges. (done)
+// In either case you'll have to regenerate this table, which requires python, which is difficult to install on windows.
+// Since you'll have to do some testing to determine the correct temperature for your application anyway, you
+// may decide that the effort isn't worth it. Who cares if it's reporting the "right" temperature as long as it's
+// keeping the temperature steady enough to print, right?
+// ./createTemperatureLookup.py --r0=100000 --t0=25 --r1=0 --r2=4700 --beta=4066 --max-adc=1023
+// r0: 100000
+// t0: 25
+// r1: 0
+// r2: 4700
+// beta: 4066
+// max adc: 1023
+#define NUMTEMPS 20
+// {ADC, temp*4 }, // temp
+uint16_t temptable[NUMTEMPS][2] PROGMEM = {
+   {1, 3364}, // 841.027617469 C
+   {21, 1329}, // 332.486789769 C
+   {41, 1104}, // 276.102666373 C
+   {61, 987}, // 246.756060004 C
+   {81, 909}, // 227.268080588 C
+   {101, 851}, // 212.78847342 C
+   {121, 805}, // 201.30176775 C
+   {141, 767}, // 191.787692666 C
+   {161, 734}, // 183.662212795 C
+   {181, 706}, // 176.561442671 C
+   {201, 680}, // 170.244089549 C
+   {221, 658}, // 164.542298163 C
+   {241, 637}, // 159.33475843 C
+   {321, 567}, // 141.921298995 C
+   {381, 524}, // 131.166509425 C
+   {581, 406}, // 101.561865389 C
+   {781, 291}, // 72.9710018071 C
+   {881, 219}, // 54.8051659223 C
+   {981, 93}, // 23.4825243529 C
+   {1010, 1} // 0.498606463441 C
+};