Print Case Temperature - any benefits ?
Posted by DaveOB
|
Re: Print Case Temperature - any benefits ? August 08, 2015 12:53PM |
OK. Solved, tested and working as far as I can tell.
Temperature Sensor Modifications
This is the detail of the mods I made to my Marlin firmware to add temperature sensors to my printers case, and show the temperature readings on my Graphical LCD screen.
There is a photo of the LCD screen in the post above this.
Disclaimer : as with everything I post, this was done entirely for my own use, and I take no responsibility if it does not work for you. Please ensure that you have a backup of your working firmware code before attempting this. This should only be attemped by a qualified and responsible person
I am using the Dallas OneWire sensors ( DS18B20 ) so that I can connect multiple sensors to the same single pin on my Ramps1.4 board.
Temperature sensors are DS18B20 sensors.
Ramps Pins diagram : [reprap.org]
Sensors :
Pin 1 ( Gnd ) - pin 1 from all sensors connected to Ground pin on Ramps1.4 Aux1 Gnd
Pin 2 ( DQ ) - pin 2 from all sensors connected to D57 pin on Ramps1.4 Aux1 D57
Pin 3 ( Vcc ) - pin 3 from all sensors connected to 5V pin on Ramps1.4 Aux1 5V
Resistor ( 4K7 ) connected between the DQ line and Vcc line ( 1 single resistor for the complete 'bus' - NOT 1 resistor for each sensor )
Code Changes :
File : Marlin.ino
at the very top of the file, add :
You need to add the OneWire library to your Arduino IDE library folder if it is not already there.
File : Marlin_main.cpp
around line 60, after the code :
add this code :
around line 250, after this code :
add this code :
and then after the code :
add this code :
In the function for :
add this code :
and after code :
add this code :
File : Marlin.h
before the code :
add this code :
File : dogm_lcd_implementation.h
before the line :
add this code :
replace this code :
with this code :
File : ultralcd.h
after :
add :
File : ultralcd.cpp
before :
add :
Temperature Sensor Modifications
This is the detail of the mods I made to my Marlin firmware to add temperature sensors to my printers case, and show the temperature readings on my Graphical LCD screen.
There is a photo of the LCD screen in the post above this.
Disclaimer : as with everything I post, this was done entirely for my own use, and I take no responsibility if it does not work for you. Please ensure that you have a backup of your working firmware code before attempting this. This should only be attemped by a qualified and responsible person
I am using the Dallas OneWire sensors ( DS18B20 ) so that I can connect multiple sensors to the same single pin on my Ramps1.4 board.
Temperature sensors are DS18B20 sensors.
Ramps Pins diagram : [reprap.org]
Sensors :
Pin 1 ( Gnd ) - pin 1 from all sensors connected to Ground pin on Ramps1.4 Aux1 Gnd
Pin 2 ( DQ ) - pin 2 from all sensors connected to D57 pin on Ramps1.4 Aux1 D57
Pin 3 ( Vcc ) - pin 3 from all sensors connected to 5V pin on Ramps1.4 Aux1 5V
Resistor ( 4K7 ) connected between the DQ line and Vcc line ( 1 single resistor for the complete 'bus' - NOT 1 resistor for each sensor )
Code Changes :
File : Marlin.ino
at the very top of the file, add :
#include
You need to add the OneWire library to your Arduino IDE library folder if it is not already there.
File : Marlin_main.cpp
around line 60, after the code :
#if NUM_SERVOS > 0 #include "Servo.h" #endif
add this code :
// OneWire code
// added for the case temp sensors
#include
OneWire myds(57); // Temperature Data wire is plugged into pin D57 ( A3 ) on the Arduino
byte DSreadstage;
byte DSresolution = 10;
unsigned long DSstarttime;
byte LocalTemp1[8] = { 0x28, 0xCC, 0xD1, 0xE1, 0x02, 0x00, 0x00, 0xE6 }; // temp sensor 1 at TOP of case - unique address
byte LocalTemp2[8] = { 0x28, 0xE5, 0x18, 0xF0, 0x01, 0x00, 0x00, 0x45 }; // temp sensor 2 at BOTTOM of case - unique address
byte LocalTemp3[8] = { 0x28, 0xE5, 0x18, 0xF0, 0x01, 0x00, 0x00, 0x46 }; // temp sensor 3 outside the case - unique address
// NOTE : the 3 Device Address values are specific to MY sensors. You will need to get the correct addresses for each of your sensors.
// See this page for instructions :
// [www.hacktronics.com]
around line 250, after this code :
float min_pos[3] = { X_MIN_POS, Y_MIN_POS, Z_MIN_POS };
float max_pos[3] = { X_MAX_POS, Y_MAX_POS, Z_MAX_POS };
bool axis_known_position[3] = {false, false, false};
float zprobe_zoffset;
add this code :
// OneWire code float DStemp1; float DStemp2; float DStemp3;
and then after the code :
#if defined (ENABLE_AUTO_BED_LEVELING) && (PROBE_SERVO_DEACTIVATION_DELAY > 0) delay(PROBE_SERVO_DEACTIVATION_DELAY); servos[servo_endstops[Z_AXIS]].detach(); #endif }
add this code :
// OneWire code
int resolution = 10;
// OneWire code
void dssetresolution(OneWire myds, byte addr[8], byte resolution) {
byte resbyte = 0x1F; // Get byte for desired resolution
if (resolution == 12){
resbyte = 0x7F;
} else if (resolution == 11) {
resbyte = 0x5F;
} else if (resolution == 10) {
resbyte = 0x3F;
}
myds.reset(); // Set configuration
myds.select(addr);
myds.write(0x4E); // Write scratchpad
myds.write(0); // TL
myds.write(0); // TH
myds.write(resbyte); // Configuration Register
myds.write(0x48); // Copy Scratchpad
}
// OneWire code
void dsconvertcommand(OneWire myds, byte addr[8]){
myds.reset();
myds.select(addr);
myds.write(0x44); // start conversion
}
// OneWire code
float dsreadtemp(OneWire myds, byte addr[8], byte resolution) {
byte present = 0;
int i;
byte data[12];
byte type_s;
float celsius;
float fahrenheit;
switch (addr[0]) {
case 0x10:
type_s = 1; //Serial.println(F(" Chip = DS18S20")); // or old DS1820
break;
case 0x28:
type_s = 0; //Serial.println(F(" Chip = DS18B20"));
break;
case 0x22:
type_s = 0; //Serial.println(F(" Chip = DS1822"));
break;
}
present = myds.reset();
myds.select(addr);
myds.write(0xBE); // Read Scratchpad
for ( i = 0; i < 9; i++) { // we need 9 bytes
data = myds.read();
}
// convert the data to actual temperature
unsigned int raw = (data[1] << 8) | data[0];
if (type_s) {
raw = raw << 3; // 9 bit resolution default
if (data[7] == 0x10) {
// count remain gives full 12 bit resolution
raw = (raw & 0xFFF0) + 12 - data[6];
} else {
byte cfg = (data[4] & 0x60);
if (cfg == 0x00) raw = raw << 3; // 9 bit resolution, 93.75 ms
else if (cfg == 0x20) raw = raw << 2; // 10 bit res, 187.5 ms
else if (cfg == 0x40) raw = raw << 1; // 11 bit res, 375 ms
// default is 12 bit resolution, 750 ms conversion time
}
}
celsius = (float)raw / 16.0;
fahrenheit = celsius * 1.8 + 32.0;
return celsius;
}
In the function for :
void setup()
{
add this code :
// OneWire code dssetresolution(myds,LocalTemp1,DSresolution); // added for the case temperature sensors dssetresolution(myds,LocalTemp2,DSresolution); // added for the case temperature sensors dssetresolution(myds,LocalTemp3,DSresolution); // added for the case temperature sensors
and after code :
void manage_inactivity()
{
if(buflen < (BUFSIZE-1))
get_command();
add this code :
// OneWire code
if (DSreadstage == 0){
if(millis() > DSstarttime + 3000){
DSstarttime = millis();
dsconvertcommand(myds,LocalTemp1);
dsconvertcommand(myds,LocalTemp2);
dsconvertcommand(myds,LocalTemp3);
DSreadstage = 1;
}
} else {
if (myds.read()) {
DStemp1 = dsreadtemp(myds,LocalTemp1, DSresolution);
DStemp2 = dsreadtemp(myds,LocalTemp2, DSresolution);
DStemp3 = dsreadtemp(myds,LocalTemp3, DSresolution);
if (DStemp1 == -127.00 || DStemp1 >= 400) DStemp1 = 0; // very high value means no sensor detected
if (DStemp2 == -127.00 || DStemp2 >= 400) DStemp2 = 0;
if (DStemp3 == -127.00 || DStemp3 >= 400) DStemp3 = 0;
DSreadstage = 0;
}
}
File : Marlin.h
before the code :
#ifdef DELTA extern float endstop_adj[3]; extern float delta_radius;
add this code :
// OneWire code extern float DStemp1; extern float DStemp2; extern float DStemp3;
File : dogm_lcd_implementation.h
before the line :
static void lcd_implementation_status_screen()
add this code :
// OneWire code
static void _draw_case_temp(int x, int DSsensor) {
int y = 6;
u8g.setFont(FONT_STATUSMENU);
if(DSsensor == 1){
y = 6;
u8g.setPrintPos(x,6);
u8g.print(ftostr21ns(DStemp1));
lcd_printPGM(PSTR(LCD_STR_DEGREE " "));
}
if(DSsensor == 2){
y = 16;
u8g.setPrintPos(x,16);
u8g.print(ftostr21ns(DStemp2));
lcd_printPGM(PSTR(LCD_STR_DEGREE " "));
}
if(DSsensor == 3){
y = 26;
u8g.setPrintPos(x,26);
u8g.print(ftostr21ns(DStemp3));
lcd_printPGM(PSTR(LCD_STR_DEGREE " "));
}
u8g.setColorIndex(0); // white on black
u8g.drawBox(x+7,y,2,2);
u8g.setColorIndex(1); // black on white
}
replace this code :
// Extruders _draw_heater_status(6, 0); #if EXTRUDERS > 1 _draw_heater_status(31, 1); #if EXTRUDERS > 2 _draw_heater_status(55, 2); #endif #endif
with this code :
// Extruders _draw_heater_status(6, 0); #if EXTRUDERS > 1 _draw_heater_status(31, 1); // my setup only has 1 extruder so removed the option for the 3rd extruder to make space for the temperatures // #if EXTRUDERS > 2 // _draw_heater_status(55, 2); // #endif #endif // OneWire code // read, calc and print the case temperature/s _draw_case_temp(42,1); // display the temp of the top temperature sensor _draw_case_temp(42,2); // display the temp of the bottom temperature sensor _draw_case_temp(42,3); // display the temp of the outside temperature sensor
File : ultralcd.h
after :
char *ftostr52(const float &x);
add :
char *ftostr21ns(const float &x);
File : ultralcd.cpp
before :
// Convert int to lj string with +123.0 format char *itostr31(const int &xx)
add :
// OneWire code
// Convert float to string with 2.1 format
char *ftostr21ns(const float &x)
{
long xx=x*10;
xx=abs(xx);
conv[0]=(xx/1000)%10+'0';
if(conv[0] == '0') conv[0] = ' ';
conv[1]=(xx/100)%10+'0';
if(conv[0] == ' ' && conv[1] == '0') conv[1] = ' ';
conv[2]=(xx/10)%10+'0';
conv[3]='.';
conv[4]=(xx)%10+'0';
conv[5]=0;
return conv;
}
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