DIY RepRap 3D Printer for Beginners – Part 3: Code

Lyndsey Mandelare

Published by Lyndsey Mandelare at May 9, 2017

Hardware:

3D Printer frame from Part 1
Arduino Mega
Ramps 1.4
SD card of any size
5 x A4988 Stepper Motor Driver with Heatsink
6 x mechanical end stops
20 x male to female wires
Smart Full Graphic Display from Discount RepRap
Power Supply (12V 30A, OEM)
Three prong wall cord and connector
6 x ¼” ring crimp connectors
Large gauge wire
Logic wire
Electrical tape
Tape, Velcro, or other cable management solutions

Software

Arduino IDE
Marlin 3D printer Firmware
Cura 3D Printing Slicing Software

Tools

Soldering iron
Solder
Wire strippers
Crimpers

Overview

Connect Belt Configuration
Connect Mechanical Endstops
Test All components
Connecting the screen
Download and Configure Marlin Firmware
Finishing Touches
Your First Print

Step 1: Connect Belt Configuration

The belt configuration for this tutorial is shown in Figure 1. Looking at this configuration may be confusing for some, so I’ll explain its purpose.

Figure 1: Belt Configuration

The system uses two belts that each wrap around one stepper and connect to diagonals of the extruder sled. This means that when only one stepper is running, the belt moves diagonally. If both motors turn in the same direction, the extruder moves along the x- axis and if they turn in opposite directions, the extruder moves along the y axis. This allows the printer to move quickly across diagonal motion and therefore saves time and energy while printing.

In order to set up this configuration, cut the timing belt into 2 x 140 cm lengths. This is entirely dependent upon the size of your printer, so make sure to set up the belts and then cut size. Start with one side. Clamp one belt to a corner of the extruder sled. The final result should look like below (Figure 2).

Figure 2: Printer with only one belt connected

Here are wrapping tricks:

Wrap the flat end around the bottom timing pulley in the stack.
Wrap the teeth-side of the belt around the timing pulley on the stepper.
Wrap the teeth side of the belt around the bottom bearings at the next two corners.
Wrap the teeth side around the bottom timing pulley and clamp it to the opposite diagonal.
Repeat on the other stepper using the top timing pulleys and bearings.

Step 2: Test All Components

Before going any further with this project, we’re going to test that all of the components work separately. Make sure that you have downloaded the Arduino IDE. Copy and paste the code below into the Arduino environment.

#define X_STEP_PIN      54

#define X_DIR_PIN       55

#define X_ENABLE_PIN       38

#define X_MIN_PIN           3

#define X_MAX_PIN           2

#define Y_STEP_PIN         60

#define Y_DIR_PIN          61

#define Y_ENABLE_PIN       56

#define Y_MIN_PIN          14

#define Y_MAX_PIN          15

#define Z_STEP_PIN         46

#define Z_DIR_PIN          48

#define Z_ENABLE_PIN       62

#define Z_MIN_PIN          18

#define Z_MAX_PIN          19

#define E_STEP_PIN         26

#define E_DIR_PIN          28

#define E_ENABLE_PIN       24

#define Q_STEP_PIN     36

#define Q_DIR_PIN          34

#define Q_ENABLE_PIN       30

#define SDPOWER            -1

#define SDSS               53

#define LED_PIN            13

#define FAN_PIN         9

#define PS_ON_PIN          12

#define KILL_PIN           -1

#define HEATER_0_PIN       10

#define HEATER_1_PIN    8

#define TEMP_0_PIN          13   // ANALOG NUMBERING

#define TEMP_1_PIN          14   // ANALOG NUMBERING

void setup() {

pinMode(FAN_PIN , OUTPUT);

pinMode(HEATER_0_PIN , OUTPUT);

pinMode(HEATER_1_PIN , OUTPUT);

pinMode(LED_PIN  , OUTPUT);

pinMode(X_STEP_PIN  , OUTPUT);

pinMode(X_DIR_PIN , OUTPUT);

pinMode(X_ENABLE_PIN , OUTPUT);

pinMode(Y_STEP_PIN  , OUTPUT);

pinMode(Y_DIR_PIN , OUTPUT);

pinMode(Y_ENABLE_PIN , OUTPUT);

pinMode(Z_STEP_PIN  , OUTPUT);

pinMode(Z_DIR_PIN , OUTPUT);

pinMode(Z_ENABLE_PIN , OUTPUT);

pinMode(E_STEP_PIN  , OUTPUT);

pinMode(E_DIR_PIN , OUTPUT);

pinMode(E_ENABLE_PIN , OUTPUT);

pinMode(Q_STEP_PIN  , OUTPUT);

pinMode(Q_DIR_PIN , OUTPUT);

pinMode(Q_ENABLE_PIN , OUTPUT);

digitalWrite(X_ENABLE_PIN , LOW);

digitalWrite(Y_ENABLE_PIN , LOW);

digitalWrite(Z_ENABLE_PIN , LOW);

digitalWrite(E_ENABLE_PIN , LOW);

digitalWrite(Q_ENABLE_PIN , LOW);

}

void loop () {

if (millis() %1000 <500)

digitalWrite(LED_PIN, HIGH);

else

digitalWrite(LED_PIN, LOW);

if (millis() %1000 <300) {

digitalWrite(HEATER_0_PIN, HIGH);

digitalWrite(HEATER_1_PIN, LOW);

digitalWrite(FAN_PIN, LOW);

} else if (millis() %1000 <600) {

digitalWrite(HEATER_0_PIN, LOW);

digitalWrite(HEATER_1_PIN, HIGH);

digitalWrite(FAN_PIN, LOW);

} else  {

digitalWrite(HEATER_0_PIN, LOW);

digitalWrite(HEATER_1_PIN, LOW);

digitalWrite(FAN_PIN, HIGH);

}

if (millis() %10000 <5000) {

digitalWrite(X_DIR_PIN , HIGH);

digitalWrite(Y_DIR_PIN , HIGH);

digitalWrite(Z_DIR_PIN , HIGH);

digitalWrite(E_DIR_PIN , HIGH);

digitalWrite(Q_DIR_PIN , HIGH);

}

else {

digitalWrite(X_DIR_PIN , LOW);

digitalWrite(Y_DIR_PIN , LOW);

digitalWrite(Z_DIR_PIN , LOW);

digitalWrite(E_DIR_PIN , LOW);

digitalWrite(Q_DIR_PIN , LOW);

}

digitalWrite(X_STEP_PIN , HIGH);

digitalWrite(Y_STEP_PIN , HIGH);

digitalWrite(Z_STEP_PIN , HIGH);

digitalWrite(E_STEP_PIN , HIGH);

digitalWrite(Q_STEP_PIN , HIGH);

delay(1);

digitalWrite(X_STEP_PIN , LOW);

digitalWrite(Y_STEP_PIN , LOW);

digitalWrite(Z_STEP_PIN , LOW);

digitalWrite(E_STEP_PIN , LOW);

digitalWrite(Q_STEP_PIN , LOW);

}

This code should activate all the steppers, fans, and heaters. The only problem with this code is that it does not activate both z-axis steppers; it only activates one. If you encounter any problems with any of the components, try isolating them and only running them in the code. If you would like to test the z-axis and thermistor, download the following codes:

<thermistortables.h>

#ifndef THERMISTORTABLES_H_
#define THERMISTORTABLES_H_

#define OVERSAMPLENR 16

#if (THERMISTORHEATER_0 == 1) || (THERMISTORHEATER_1 == 1)  || (THERMISTORHEATER_2 == 1) || (THERMISTORBED == 1) //100k bed thermistor

const short temptable_1[][2] PROGMEM = {
{       23*OVERSAMPLENR ,       300     },
{       25*OVERSAMPLENR ,       295     },
{       27*OVERSAMPLENR ,       290     },
{       28*OVERSAMPLENR ,       285     },
{       31*OVERSAMPLENR ,       280     },
{       33*OVERSAMPLENR ,       275     },
{       35*OVERSAMPLENR ,       270     },
{       38*OVERSAMPLENR ,       265     },
{       41*OVERSAMPLENR ,       260     },
{       44*OVERSAMPLENR ,       255     },
{       48*OVERSAMPLENR ,       250     },
{       52*OVERSAMPLENR ,       245     },
{       56*OVERSAMPLENR ,       240     },
{       61*OVERSAMPLENR ,       235     },
{       66*OVERSAMPLENR ,       230     },
{       71*OVERSAMPLENR ,       225     },
{       78*OVERSAMPLENR ,       220     },
{       84*OVERSAMPLENR ,       215     },
{       92*OVERSAMPLENR ,       210     },
{       100*OVERSAMPLENR        ,       205     },
{       109*OVERSAMPLENR        ,       200     },
{       120*OVERSAMPLENR        ,       195     },
{       131*OVERSAMPLENR        ,       190     },
{       143*OVERSAMPLENR        ,       185     },
{       156*OVERSAMPLENR        ,       180     },
{       171*OVERSAMPLENR        ,       175     },
{       187*OVERSAMPLENR        ,       170     },
{       205*OVERSAMPLENR        ,       165     },
{       224*OVERSAMPLENR        ,       160     },
{       245*OVERSAMPLENR        ,       155     },
{       268*OVERSAMPLENR        ,       150     },
{       293*OVERSAMPLENR        ,       145     },
{       320*OVERSAMPLENR        ,       140     },
{       348*OVERSAMPLENR        ,       135     },
{       379*OVERSAMPLENR        ,       130     },
{       411*OVERSAMPLENR        ,       125     },
{       445*OVERSAMPLENR        ,       120     },
{       480*OVERSAMPLENR        ,       115     },
{       516*OVERSAMPLENR        ,       110     },
{       553*OVERSAMPLENR        ,       105     },
{       591*OVERSAMPLENR        ,       100     },
{       628*OVERSAMPLENR        ,       95      },
{       665*OVERSAMPLENR        ,       90      },
{       702*OVERSAMPLENR        ,       85      },
{       737*OVERSAMPLENR        ,       80      },
{       770*OVERSAMPLENR        ,       75      },
{       801*OVERSAMPLENR        ,       70      },
{       830*OVERSAMPLENR        ,       65      },
{       857*OVERSAMPLENR        ,       60      },
{       881*OVERSAMPLENR        ,       55      },
{       903*OVERSAMPLENR        ,       50      },
{       922*OVERSAMPLENR        ,       45      },
{       939*OVERSAMPLENR        ,       40      },
{       954*OVERSAMPLENR        ,       35      },
{       966*OVERSAMPLENR        ,       30      },
{       977*OVERSAMPLENR        ,       25      },
{       985*OVERSAMPLENR        ,       20      },
{       993*OVERSAMPLENR        ,       15      },
{       999*OVERSAMPLENR        ,       10      },
{       1004*OVERSAMPLENR       ,       5       },
{       1008*OVERSAMPLENR       ,       0       } //safety
};
#endif
#if (THERMISTORHEATER_0 == 2) || (THERMISTORHEATER_1 == 2) || (THERMISTORHEATER_2 == 2) || (THERMISTORBED == 2) //200k bed thermistor
const short temptable_2[][2] PROGMEM = {
  {1*OVERSAMPLENR, 848},
  {54*OVERSAMPLENR, 275},
  {107*OVERSAMPLENR, 228},
  {160*OVERSAMPLENR, 202},
  {213*OVERSAMPLENR, 185},
  {266*OVERSAMPLENR, 171},
  {319*OVERSAMPLENR, 160},
  {372*OVERSAMPLENR, 150},
  {425*OVERSAMPLENR, 141},
  {478*OVERSAMPLENR, 133},
  {531*OVERSAMPLENR, 125},
  {584*OVERSAMPLENR, 118},
  {637*OVERSAMPLENR, 110},
  {690*OVERSAMPLENR, 103},
  {743*OVERSAMPLENR, 95},
  {796*OVERSAMPLENR, 86},
  {849*OVERSAMPLENR, 77},
  {902*OVERSAMPLENR, 65},
  {955*OVERSAMPLENR, 49},
  {1008*OVERSAMPLENR, 17},
  {1020*OVERSAMPLENR, 0} //safety
};

#endif
#if (THERMISTORHEATER_0 == 3) || (THERMISTORHEATER_1 == 3) || (THERMISTORHEATER_2 == 3) || (THERMISTORBED == 3) //mendel-parts
const short temptable_3[][2] PROGMEM = {
               {1*OVERSAMPLENR,864},
               {21*OVERSAMPLENR,300},
               {25*OVERSAMPLENR,290},
               {29*OVERSAMPLENR,280},
               {33*OVERSAMPLENR,270},
               {39*OVERSAMPLENR,260},
               {46*OVERSAMPLENR,250},
               {54*OVERSAMPLENR,240},
               {64*OVERSAMPLENR,230},
               {75*OVERSAMPLENR,220},
               {90*OVERSAMPLENR,210},
               {107*OVERSAMPLENR,200},
               {128*OVERSAMPLENR,190},
               {154*OVERSAMPLENR,180},
               {184*OVERSAMPLENR,170},
               {221*OVERSAMPLENR,160},
               {265*OVERSAMPLENR,150},
               {316*OVERSAMPLENR,140},
               {375*OVERSAMPLENR,130},
               {441*OVERSAMPLENR,120},
               {513*OVERSAMPLENR,110},
               {588*OVERSAMPLENR,100},
               {734*OVERSAMPLENR,80},
               {856*OVERSAMPLENR,60},
               {938*OVERSAMPLENR,40},
               {986*OVERSAMPLENR,20},
               {1008*OVERSAMPLENR,0},
               {1018*OVERSAMPLENR,-20}
       };

#endif
#if (THERMISTORHEATER_0 == 4) || (THERMISTORHEATER_1 == 4) || (THERMISTORHEATER_2 == 4) || (THERMISTORBED == 4) //10k thermistor
const short temptable_4[][2] PROGMEM = {
  {1*OVERSAMPLENR, 430},
  {54*OVERSAMPLENR, 137},
  {107*OVERSAMPLENR, 107},
  {160*OVERSAMPLENR, 91},
  {213*OVERSAMPLENR, 80},
  {266*OVERSAMPLENR, 71},
  {319*OVERSAMPLENR, 64},
  {372*OVERSAMPLENR, 57},
  {425*OVERSAMPLENR, 51},
  {478*OVERSAMPLENR, 46},
  {531*OVERSAMPLENR, 41},
  {584*OVERSAMPLENR, 35},
  {637*OVERSAMPLENR, 30},
  {690*OVERSAMPLENR, 25},
  {743*OVERSAMPLENR, 20},
  {796*OVERSAMPLENR, 14},
  {849*OVERSAMPLENR, 7},
  {902*OVERSAMPLENR, 0},
  {955*OVERSAMPLENR, -11},
  {1008*OVERSAMPLENR, -35}
};
#endif

#if (THERMISTORHEATER_0 == 5) || (THERMISTORHEATER_1 == 5) || (THERMISTORHEATER_2 == 5) || (THERMISTORBED == 5) //100k ParCan thermistor (104GT-2)
const short temptable_5[][2] PROGMEM = {
{1*OVERSAMPLENR, 713},
{18*OVERSAMPLENR, 316},
{35*OVERSAMPLENR, 266},
{52*OVERSAMPLENR, 239},
{69*OVERSAMPLENR, 221},
{86*OVERSAMPLENR, 208},
{103*OVERSAMPLENR, 197},
{120*OVERSAMPLENR, 188},
{137*OVERSAMPLENR, 181},
{154*OVERSAMPLENR, 174},
{171*OVERSAMPLENR, 169},
{188*OVERSAMPLENR, 163},
{205*OVERSAMPLENR, 159},
{222*OVERSAMPLENR, 154},
{239*OVERSAMPLENR, 150},
{256*OVERSAMPLENR, 147},
{273*OVERSAMPLENR, 143},
{290*OVERSAMPLENR, 140},
{307*OVERSAMPLENR, 136},
{324*OVERSAMPLENR, 133},
{341*OVERSAMPLENR, 130},
{358*OVERSAMPLENR, 128},
{375*OVERSAMPLENR, 125},
{392*OVERSAMPLENR, 122},
{409*OVERSAMPLENR, 120},
{426*OVERSAMPLENR, 117},
{443*OVERSAMPLENR, 115},
{460*OVERSAMPLENR, 112},
{477*OVERSAMPLENR, 110},
{494*OVERSAMPLENR, 108},
{511*OVERSAMPLENR, 106},
{528*OVERSAMPLENR, 103},
{545*OVERSAMPLENR, 101},
{562*OVERSAMPLENR, 99},
{579*OVERSAMPLENR, 97},
{596*OVERSAMPLENR, 95},
{613*OVERSAMPLENR, 92},
{630*OVERSAMPLENR, 90},
{647*OVERSAMPLENR, 88},
{664*OVERSAMPLENR, 86},
{681*OVERSAMPLENR, 84},
{698*OVERSAMPLENR, 81},
{715*OVERSAMPLENR, 79},
{732*OVERSAMPLENR, 77},
{749*OVERSAMPLENR, 75},
{766*OVERSAMPLENR, 72},
{783*OVERSAMPLENR, 70},
{800*OVERSAMPLENR, 67},
{817*OVERSAMPLENR, 64},
{834*OVERSAMPLENR, 61},
{851*OVERSAMPLENR, 58},
{868*OVERSAMPLENR, 55},
{885*OVERSAMPLENR, 52},
{902*OVERSAMPLENR, 48},
{919*OVERSAMPLENR, 44},
{936*OVERSAMPLENR, 40},
{953*OVERSAMPLENR, 34},
{970*OVERSAMPLENR, 28},
{987*OVERSAMPLENR, 20},
{1004*OVERSAMPLENR, 8},
{1021*OVERSAMPLENR, 0}
};
#endif

#if (THERMISTORHEATER_0 == 6) || (THERMISTORHEATER_1 == 6) || (THERMISTORHEATER_2 == 6) || (THERMISTORBED == 6) // 100k Epcos thermistor
const short temptable_6[][2] PROGMEM = {
  {28*OVERSAMPLENR, 250},
  {31*OVERSAMPLENR, 245},
  {35*OVERSAMPLENR, 240},
  {39*OVERSAMPLENR, 235},
  {42*OVERSAMPLENR, 230},
  {44*OVERSAMPLENR, 225},
  {49*OVERSAMPLENR, 220},
  {53*OVERSAMPLENR, 215},
  {62*OVERSAMPLENR, 210},
  {73*OVERSAMPLENR, 205},
  {72*OVERSAMPLENR, 200},
  {94*OVERSAMPLENR, 190},
  {102*OVERSAMPLENR, 185},
  {116*OVERSAMPLENR, 170},
  {143*OVERSAMPLENR, 160},
  {183*OVERSAMPLENR, 150},
  {223*OVERSAMPLENR, 140},
  {270*OVERSAMPLENR, 130},
  {318*OVERSAMPLENR, 120},
  {383*OVERSAMPLENR, 110},
  {413*OVERSAMPLENR, 105},
  {439*OVERSAMPLENR, 100},
  {484*OVERSAMPLENR, 95},
  {513*OVERSAMPLENR, 90},
  {607*OVERSAMPLENR, 80},
  {664*OVERSAMPLENR, 70},
  {781*OVERSAMPLENR, 60},
  {810*OVERSAMPLENR, 55},
  {849*OVERSAMPLENR, 50},
  {914*OVERSAMPLENR, 45},
  {914*OVERSAMPLENR, 40},
  {935*OVERSAMPLENR, 35},
  {954*OVERSAMPLENR, 30},
  {970*OVERSAMPLENR, 25},
  {978*OVERSAMPLENR, 22},
  {1008*OVERSAMPLENR, 3}
};
#endif

#if (THERMISTORHEATER_0 == 7) || (THERMISTORHEATER_1 == 7) || (THERMISTORHEATER_2 == 7) || (THERMISTORBED == 7) // 100k Honeywell 135-104LAG-J01
const short temptable_7[][2] PROGMEM = {
  {46*OVERSAMPLENR, 270},
  {50*OVERSAMPLENR, 265},
  {54*OVERSAMPLENR, 260},
  {58*OVERSAMPLENR, 255},
  {62*OVERSAMPLENR, 250},
  {67*OVERSAMPLENR, 245},
  {72*OVERSAMPLENR, 240},
  {79*OVERSAMPLENR, 235},
  {85*OVERSAMPLENR, 230},
  {91*OVERSAMPLENR, 225},
  {99*OVERSAMPLENR, 220},
  {107*OVERSAMPLENR, 215},
  {116*OVERSAMPLENR, 210},
  {126*OVERSAMPLENR, 205},
  {136*OVERSAMPLENR, 200},
  {149*OVERSAMPLENR, 195},
  {160*OVERSAMPLENR, 190},
  {175*OVERSAMPLENR, 185},
  {191*OVERSAMPLENR, 180},
  {209*OVERSAMPLENR, 175},
  {224*OVERSAMPLENR, 170},
  {246*OVERSAMPLENR, 165},
  {267*OVERSAMPLENR, 160},
  {293*OVERSAMPLENR, 155},
  {316*OVERSAMPLENR, 150},
  {340*OVERSAMPLENR, 145},
  {364*OVERSAMPLENR, 140},
  {396*OVERSAMPLENR, 135},
  {425*OVERSAMPLENR, 130},
  {460*OVERSAMPLENR, 125},
  {489*OVERSAMPLENR, 120},
  {526*OVERSAMPLENR, 115},
  {558*OVERSAMPLENR, 110},
  {591*OVERSAMPLENR, 105},
  {628*OVERSAMPLENR, 100},
  {660*OVERSAMPLENR, 95},
  {696*OVERSAMPLENR, 90},
  {733*OVERSAMPLENR, 85},
  {761*OVERSAMPLENR, 80},
  {794*OVERSAMPLENR, 75},
  {819*OVERSAMPLENR, 70},
  {847*OVERSAMPLENR, 65},
  {870*OVERSAMPLENR, 60},
  {892*OVERSAMPLENR, 55},
  {911*OVERSAMPLENR, 50},
  {929*OVERSAMPLENR, 45},
  {944*OVERSAMPLENR, 40},
  {959*OVERSAMPLENR, 35},
  {971*OVERSAMPLENR, 30},
  {981*OVERSAMPLENR, 25},
  {989*OVERSAMPLENR, 20},
  {994*OVERSAMPLENR, 15},
  {1001*OVERSAMPLENR, 10},
  {1005*OVERSAMPLENR, 5}
};
#endif

#define _TT_NAME(_N) temptable_ ## _N
#define TT_NAME(_N) _TT_NAME(_N)

#ifdef THERMISTORHEATER_0
 #define heater_0_temptable TT_NAME(THERMISTORHEATER_0)
 #define heater_0_temptable_len (sizeof(heater_0_temptable)/sizeof(*heater_0_temptable))
#else
#ifdef HEATER_0_USES_THERMISTOR
 #error No heater 0 thermistor table specified
#else  // HEATER_0_USES_THERMISTOR
 #define heater_0_temptable 0
 #define heater_0_temptable_len 0
#endif // HEATER_0_USES_THERMISTOR
#endif

#ifdef THERMISTORHEATER_1
 #define heater_1_temptable TT_NAME(THERMISTORHEATER_1)
 #define heater_1_temptable_len (sizeof(heater_1_temptable)/sizeof(*heater_1_temptable))
#else
#ifdef HEATER_1_USES_THERMISTOR
 #error No heater 1 thermistor table specified
#else  // HEATER_1_USES_THERMISTOR
 #define heater_1_temptable 0
 #define heater_1_temptable_len 0
#endif // HEATER_1_USES_THERMISTOR
#endif

#ifdef THERMISTORHEATER_2
 #define heater_2_temptable TT_NAME(THERMISTORHEATER_2)
 #define heater_2_temptable_len (sizeof(heater_2_temptable)/sizeof(*heater_2_temptable))
#else
#ifdef HEATER_2_USES_THERMISTOR
 #error No heater 2 thermistor table specified
#else  // HEATER_2_USES_THERMISTOR
 #define heater_2_temptable 0
 #define heater_2_temptable_len 0
#endif // HEATER_2_USES_THERMISTOR
#endif

#ifdef THERMISTORBED
 #define bedtemptable TT_NAME(THERMISTORBED)
 #define bedtemptable_len (sizeof(bedtemptable)/sizeof(*bedtemptable))
#else
#ifdef BED_USES_THERMISTOR
 #error No bed thermistor table specified
#endif // BED_USES_THERMISTOR
#endif

#endif //THERMISTORTABLES_H_

<ramps14test.ino>

#include "thermistortables.h"

#define X_STEP_PIN         54

#define X_DIR_PIN          55

#define X_ENABLE_PIN       38

#define X_MIN_PIN           3

#define X_MAX_PIN           2

#define Y_STEP_PIN         60

#define Y_DIR_PIN          61

#define Y_ENABLE_PIN       56

#define Y_MIN_PIN          14

#define Y_MAX_PIN          15

#define Z_STEP_PIN         46

#define Z_DIR_PIN          48

#define Z_ENABLE_PIN       62

#define Z_MIN_PIN          18

#define Z_MAX_PIN          19

#define E_STEP_PIN         26

#define E_DIR_PIN          28

#define E_ENABLE_PIN       24

#define Q_STEP_PIN         36

#define Q_DIR_PIN          34

#define Q_ENABLE_PIN       30

#define SDPOWER            -1

#define EXTRUDERS 3

#define TEMP_SENSOR_AD595_OFFSET 0.0

#define TEMP_SENSOR_AD595_GAIN   1.0

#define THERMISTORHEATER_0 1

#define THERMISTORHEATER_1 1

#define THERMISTORHEATER_2 1

#define HEATER_0_USES_THERMISTOR 1

#define HEATER_1_USES_THERMISTOR 1

#define HEATER_2_USES_THERMISTOR 1

static void *heater_ttbl_map[EXTRUDERS] = { (void *)heater_0_temptable

#if EXTRUDERS > 1

, (void *)heater_1_temptable

#endif

#if EXTRUDERS > 2

, (void *)heater_2_temptable

#endif

#if EXTRUDERS > 3

#error Unsupported number of extruders

#endif

};

static int heater_ttbllen_map[EXTRUDERS] = { heater_0_temptable_len

#if EXTRUDERS > 1

, heater_1_temptable_len

#endif

#if EXTRUDERS > 2

, heater_2_temptable_len

#endif

#if EXTRUDERS > 3

#error Unsupported number of extruders

#endif

};

#define PGM_RD_W(x)   (short)pgm_read_word(&x)

#define SDSS               53

#define LED_PIN            13

#define FAN_PIN            9

#define PS_ON_PIN          12

#define KILL_PIN           -1

#define HEATER_0_PIN       10

#define HEATER_1_PIN       8

#define TEMP_0_PIN         15   // ANALOG NUMBERING

#define TEMP_1_PIN         14   // ANALOG NUMBERING

#define TEMP_2_PIN         13   // ANALOG NUMBERING

void setup() {

pinMode(TEMP_0_PIN  , INPUT);

pinMode(TEMP_1_PIN  , INPUT);

pinMode(TEMP_2_PIN  , INPUT);

pinMode(FAN_PIN , OUTPUT);

pinMode(HEATER_0_PIN , OUTPUT);

pinMode(HEATER_1_PIN , OUTPUT);

pinMode(LED_PIN  , OUTPUT);

pinMode(X_STEP_PIN  , OUTPUT);

pinMode(X_DIR_PIN    , OUTPUT);

pinMode(X_ENABLE_PIN    , OUTPUT);

pinMode(Y_STEP_PIN  , OUTPUT);

pinMode(Y_DIR_PIN    , OUTPUT);

pinMode(Y_ENABLE_PIN    , OUTPUT);

pinMode(Z_STEP_PIN  , OUTPUT);

pinMode(Z_DIR_PIN    , OUTPUT);

pinMode(Z_ENABLE_PIN    , OUTPUT);

pinMode(E_STEP_PIN  , OUTPUT);

pinMode(E_DIR_PIN    , OUTPUT);

pinMode(E_ENABLE_PIN    , OUTPUT);

pinMode(Q_STEP_PIN  , OUTPUT);

pinMode(Q_DIR_PIN    , OUTPUT);

pinMode(Q_ENABLE_PIN    , OUTPUT);

digitalWrite(X_ENABLE_PIN    , LOW);

digitalWrite(Y_ENABLE_PIN    , LOW);

digitalWrite(Z_ENABLE_PIN    , LOW);

digitalWrite(E_ENABLE_PIN    , LOW);

digitalWrite(Q_ENABLE_PIN    , LOW);

Serial.begin(115200);

}

float analog2temp(int raw, uint8_t e) {

#ifdef HEATER_0_USES_MAX6675

if (e == 0)

{

return 0.25 * raw;

}

#endif

if(heater_ttbl_map[e] != 0)

{

float celsius = 0;

byte i;

short (*tt)[][2] = (short (*)[][2])(heater_ttbl_map[e]);

raw = (1023 * OVERSAMPLENR) - raw;

for (i=1; i<heater_ttbllen_map[e]; i++)

{

if ((PGM_RD_W((*tt)[i][0]) > raw) && ((float)(PGM_RD_W((*tt)[i][0]) - PGM_RD_W((*tt)[i-1][0])) >0))

{

celsius = PGM_RD_W((*tt)[i-1][1]) +

(raw - PGM_RD_W((*tt)[i-1][0])) *

(float)(PGM_RD_W((*tt)[i][1]) - PGM_RD_W((*tt)[i-1][1])) /

(float)(PGM_RD_W((*tt)[i][0]) - PGM_RD_W((*tt)[i-1][0]));

break;

}

// Overflow: Set to last value in the table

if (i == heater_ttbllen_map[e]) celsius = PGM_RD_W((*tt)[i-1][1]);

return celsius;

}

return ((raw * ((5.0 * 100.0) / 1024.0) / OVERSAMPLENR) * TEMP_SENSOR_AD595_GAIN) + TEMP_SENSOR_AD595_OFFSET;

}

unsigned long prevMillis;

void loop () {

if (millis() %1000 <500)

digitalWrite(LED_PIN, HIGH);

else

digitalWrite(LED_PIN, LOW);

if (millis() %1000 <300) {

digitalWrite(HEATER_0_PIN, HIGH);

digitalWrite(HEATER_1_PIN, LOW);

digitalWrite(FAN_PIN, LOW);

} else if (millis() %1000 <600) {

digitalWrite(HEATER_0_PIN, LOW);

digitalWrite(HEATER_1_PIN, HIGH);

digitalWrite(FAN_PIN, LOW);

} else  {

digitalWrite(HEATER_0_PIN, LOW);

digitalWrite(HEATER_1_PIN, LOW);

digitalWrite(FAN_PIN, HIGH);

}

if (millis() %2000 <1000) {

digitalWrite(X_DIR_PIN    , HIGH);

digitalWrite(Y_DIR_PIN    , HIGH);

digitalWrite(Z_DIR_PIN    , HIGH);

digitalWrite(E_DIR_PIN    , HIGH);

digitalWrite(Q_DIR_PIN    , HIGH);

}

else {

digitalWrite(X_DIR_PIN    , LOW);

digitalWrite(Y_DIR_PIN    , LOW);

digitalWrite(Z_DIR_PIN    , LOW);

digitalWrite(E_DIR_PIN    , LOW);

digitalWrite(Q_DIR_PIN    , LOW);

}

digitalWrite(X_STEP_PIN    , HIGH);

digitalWrite(Y_STEP_PIN    , HIGH);

digitalWrite(Z_STEP_PIN    , HIGH);

digitalWrite(E_STEP_PIN    , HIGH);

digitalWrite(Q_STEP_PIN    , HIGH);

delay(1);

digitalWrite(X_STEP_PIN    , LOW);

digitalWrite(Y_STEP_PIN    , LOW);

digitalWrite(Z_STEP_PIN    , LOW);

digitalWrite(E_STEP_PIN    , LOW);

digitalWrite(Q_STEP_PIN    , LOW);

if (millis() -prevMillis >500){

prevMillis=millis();

int t = analogRead( TEMP_0_PIN);

Serial.print("T0 ");

Serial.print(t);

Serial.print("/");

Serial.print(analog2temp(1024 - t,0),0);

Serial.print(" T1 ");

t = analogRead( TEMP_1_PIN);

Serial.print(t);

Serial.print("/");

Serial.print(analog2temp(1024 - t,1),0);

Serial.print(" T2 ");

t = analogRead( TEMP_2_PIN);

Serial.print(t);

Serial.print("/");

Serial.println(analog2temp(1024 - t,2),0);

}

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#define X_STEP_PIN 54

#define X_DIR_PIN 55

#define X_ENABLE_PIN 38

#define X_MIN_PIN 3

#define X_MAX_PIN 2

#define Y_STEP_PIN 60

#define Y_DIR_PIN 61

#define Y_ENABLE_PIN 56

#define Y_MIN_PIN 14

#define Y_MAX_PIN 15

#define Z_STEP_PIN 46

#define Z_DIR_PIN 48

#define Z_ENABLE_PIN 62

#define Z_MIN_PIN 18

#define Z_MAX_PIN 19

#define E_STEP_PIN 26

#define E_DIR_PIN 28

#define E_ENABLE_PIN 24

#define Q_STEP_PIN 36

#define Q_DIR_PIN 34

#define Q_ENABLE_PIN 30

#define SDPOWER -1

#define SDSS 53

#define LED_PIN 13

#define FAN_PIN 9

#define PS_ON_PIN 12

#define KILL_PIN -1

#define HEATER_0_PIN 10

#define HEATER_1_PIN 8

#define TEMP_0_PIN 13 // ANALOG NUMBERING

#define TEMP_1_PIN 14 // ANALOG NUMBERING

void setup() {

pinMode(FAN_PIN , OUTPUT);

pinMode(HEATER_0_PIN , OUTPUT);

pinMode(HEATER_1_PIN , OUTPUT);

pinMode(LED_PIN , OUTPUT);

pinMode(X_STEP_PIN , OUTPUT);

pinMode(X_DIR_PIN , OUTPUT);

pinMode(X_ENABLE_PIN , OUTPUT);

pinMode(Y_STEP_PIN , OUTPUT);

pinMode(Y_DIR_PIN , OUTPUT);

pinMode(Y_ENABLE_PIN , OUTPUT);

pinMode(Z_STEP_PIN , OUTPUT);

pinMode(Z_DIR_PIN , OUTPUT);

pinMode(Z_ENABLE_PIN , OUTPUT);

pinMode(E_STEP_PIN , OUTPUT);

pinMode(E_DIR_PIN , OUTPUT);

pinMode(E_ENABLE_PIN , OUTPUT);

pinMode(Q_STEP_PIN , OUTPUT);

pinMode(Q_DIR_PIN , OUTPUT);

pinMode(Q_ENABLE_PIN , OUTPUT);

digitalWrite(X_ENABLE_PIN , LOW);

digitalWrite(Y_ENABLE_PIN , LOW);

digitalWrite(Z_ENABLE_PIN , LOW);

digitalWrite(E_ENABLE_PIN , LOW);

digitalWrite(Q_ENABLE_PIN , LOW);

}

void loop () {

if (millis() %1000 <500)

digitalWrite(LED_PIN, HIGH);

else

digitalWrite(LED_PIN, LOW);

if (millis() %1000 <300) {

digitalWrite(HEATER_0_PIN, HIGH);

digitalWrite(HEATER_1_PIN, LOW);

digitalWrite(FAN_PIN, LOW);

} else if (millis() %1000 <600) {

digitalWrite(HEATER_0_PIN, LOW);

digitalWrite(HEATER_1_PIN, HIGH);

digitalWrite(FAN_PIN, LOW);

} else {

digitalWrite(HEATER_0_PIN, LOW);

digitalWrite(HEATER_1_PIN, LOW);

digitalWrite(FAN_PIN, HIGH);

}

if (millis() %10000 <5000) {

digitalWrite(X_DIR_PIN , HIGH);

digitalWrite(Y_DIR_PIN , HIGH);

digitalWrite(Z_DIR_PIN , HIGH);

digitalWrite(E_DIR_PIN , HIGH);

digitalWrite(Q_DIR_PIN , HIGH);

}

else {

digitalWrite(X_DIR_PIN , LOW);

digitalWrite(Y_DIR_PIN , LOW);

digitalWrite(Z_DIR_PIN , LOW);

digitalWrite(E_DIR_PIN , LOW);

digitalWrite(Q_DIR_PIN , LOW);

}

digitalWrite(X_STEP_PIN , HIGH);

digitalWrite(Y_STEP_PIN , HIGH);

digitalWrite(Z_STEP_PIN , HIGH);

digitalWrite(E_STEP_PIN , HIGH);

digitalWrite(Q_STEP_PIN , HIGH);

delay(1);

digitalWrite(X_STEP_PIN , LOW);

digitalWrite(Y_STEP_PIN , LOW);

digitalWrite(Z_STEP_PIN , LOW);

digitalWrite(E_STEP_PIN , LOW);

digitalWrite(Q_STEP_PIN , LOW);

}

<thermistortables.h>

#ifndef THERMISTORTABLES_H_

#define THERMISTORTABLES_H_

#define OVERSAMPLENR 16

#if (THERMISTORHEATER_0 == 1) || (THERMISTORHEATER_1 == 1) || (THERMISTORHEATER_2 == 1) || (THERMISTORBED == 1) //100k bed thermistor

const short temptable_1[][2] PROGMEM = {

{ 23*OVERSAMPLENR , 300 },

{ 25*OVERSAMPLENR , 295 },

{ 27*OVERSAMPLENR , 290 },

{ 28*OVERSAMPLENR , 285 },

{ 31*OVERSAMPLENR , 280 },

{ 33*OVERSAMPLENR , 275 },

{ 35*OVERSAMPLENR , 270 },

{ 38*OVERSAMPLENR , 265 },

{ 41*OVERSAMPLENR , 260 },

{ 44*OVERSAMPLENR , 255 },

{ 48*OVERSAMPLENR , 250 },

{ 52*OVERSAMPLENR , 245 },

{ 56*OVERSAMPLENR , 240 },

{ 61*OVERSAMPLENR , 235 },

{ 66*OVERSAMPLENR , 230 },

{ 71*OVERSAMPLENR , 225 },

{ 78*OVERSAMPLENR , 220 },

{ 84*OVERSAMPLENR , 215 },

{ 92*OVERSAMPLENR , 210 },

{ 100*OVERSAMPLENR , 205 },

{ 109*OVERSAMPLENR , 200 },

{ 120*OVERSAMPLENR , 195 },

{ 131*OVERSAMPLENR , 190 },

{ 143*OVERSAMPLENR , 185 },

{ 156*OVERSAMPLENR , 180 },

{ 171*OVERSAMPLENR , 175 },

{ 187*OVERSAMPLENR , 170 },

{ 205*OVERSAMPLENR , 165 },

{ 224*OVERSAMPLENR , 160 },

{ 245*OVERSAMPLENR , 155 },

{ 268*OVERSAMPLENR , 150 },

{ 293*OVERSAMPLENR , 145 },

{ 320*OVERSAMPLENR , 140 },

{ 348*OVERSAMPLENR , 135 },

{ 379*OVERSAMPLENR , 130 },

{ 411*OVERSAMPLENR , 125 },

{ 445*OVERSAMPLENR , 120 },

{ 480*OVERSAMPLENR , 115 },

{ 516*OVERSAMPLENR , 110 },

{ 553*OVERSAMPLENR , 105 },

{ 591*OVERSAMPLENR , 100 },

{ 628*OVERSAMPLENR , 95 },

{ 665*OVERSAMPLENR , 90 },

{ 702*OVERSAMPLENR , 85 },

{ 737*OVERSAMPLENR , 80 },

{ 770*OVERSAMPLENR , 75 },

{ 801*OVERSAMPLENR , 70 },

{ 830*OVERSAMPLENR , 65 },

{ 857*OVERSAMPLENR , 60 },

{ 881*OVERSAMPLENR , 55 },

{ 903*OVERSAMPLENR , 50 },

{ 922*OVERSAMPLENR , 45 },

{ 939*OVERSAMPLENR , 40 },

{ 954*OVERSAMPLENR , 35 },

{ 966*OVERSAMPLENR , 30 },

{ 977*OVERSAMPLENR , 25 },

{ 985*OVERSAMPLENR , 20 },

{ 993*OVERSAMPLENR , 15 },

{ 999*OVERSAMPLENR , 10 },

{ 1004*OVERSAMPLENR , 5 },

{ 1008*OVERSAMPLENR , 0 } //safety

};

#endif

#if (THERMISTORHEATER_0 == 2) || (THERMISTORHEATER_1 == 2) || (THERMISTORHEATER_2 == 2) || (THERMISTORBED == 2) //200k bed thermistor

const short temptable_2[][2] PROGMEM = {

{1*OVERSAMPLENR, 848},

{54*OVERSAMPLENR, 275},

{107*OVERSAMPLENR, 228},

{160*OVERSAMPLENR, 202},

{213*OVERSAMPLENR, 185},

{266*OVERSAMPLENR, 171},

{319*OVERSAMPLENR, 160},

{372*OVERSAMPLENR, 150},

{425*OVERSAMPLENR, 141},

{478*OVERSAMPLENR, 133},

{531*OVERSAMPLENR, 125},

{584*OVERSAMPLENR, 118},

{637*OVERSAMPLENR, 110},

{690*OVERSAMPLENR, 103},

{743*OVERSAMPLENR, 95},

{796*OVERSAMPLENR, 86},

{849*OVERSAMPLENR, 77},

{902*OVERSAMPLENR, 65},

{955*OVERSAMPLENR, 49},

{1008*OVERSAMPLENR, 17},

{1020*OVERSAMPLENR, 0} //safety

};

#endif

#if (THERMISTORHEATER_0 == 3) || (THERMISTORHEATER_1 == 3) || (THERMISTORHEATER_2 == 3) || (THERMISTORBED == 3) //mendel-parts

const short temptable_3[][2] PROGMEM = {

{1*OVERSAMPLENR,864},

{21*OVERSAMPLENR,300},

{25*OVERSAMPLENR,290},

{29*OVERSAMPLENR,280},

{33*OVERSAMPLENR,270},

{39*OVERSAMPLENR,260},

{46*OVERSAMPLENR,250},

{54*OVERSAMPLENR,240},

{64*OVERSAMPLENR,230},

{75*OVERSAMPLENR,220},

{90*OVERSAMPLENR,210},

{107*OVERSAMPLENR,200},

{128*OVERSAMPLENR,190},

{154*OVERSAMPLENR,180},

{184*OVERSAMPLENR,170},

{221*OVERSAMPLENR,160},

{265*OVERSAMPLENR,150},

{316*OVERSAMPLENR,140},

{375*OVERSAMPLENR,130},

{441*OVERSAMPLENR,120},

{513*OVERSAMPLENR,110},

{588*OVERSAMPLENR,100},

{734*OVERSAMPLENR,80},

{856*OVERSAMPLENR,60},

{938*OVERSAMPLENR,40},

{986*OVERSAMPLENR,20},

{1008*OVERSAMPLENR,0},

{1018*OVERSAMPLENR,-20}

};

#endif

#if (THERMISTORHEATER_0 == 4) || (THERMISTORHEATER_1 == 4) || (THERMISTORHEATER_2 == 4) || (THERMISTORBED == 4) //10k thermistor

const short temptable_4[][2] PROGMEM = {

{1*OVERSAMPLENR, 430},

{54*OVERSAMPLENR, 137},

{107*OVERSAMPLENR, 107},

{160*OVERSAMPLENR, 91},

{213*OVERSAMPLENR, 80},

{266*OVERSAMPLENR, 71},

{319*OVERSAMPLENR, 64},

{372*OVERSAMPLENR, 57},

{425*OVERSAMPLENR, 51},

{478*OVERSAMPLENR, 46},

{531*OVERSAMPLENR, 41},

{584*OVERSAMPLENR, 35},

{637*OVERSAMPLENR, 30},

{690*OVERSAMPLENR, 25},

{743*OVERSAMPLENR, 20},

{796*OVERSAMPLENR, 14},

{849*OVERSAMPLENR, 7},

{902*OVERSAMPLENR, 0},

{955*OVERSAMPLENR, -11},

{1008*OVERSAMPLENR, -35}

};

#endif

#if (THERMISTORHEATER_0 == 5) || (THERMISTORHEATER_1 == 5) || (THERMISTORHEATER_2 == 5) || (THERMISTORBED == 5) //100k ParCan thermistor (104GT-2)

const short temptable_5[][2] PROGMEM = {

{1*OVERSAMPLENR, 713},

{18*OVERSAMPLENR, 316},

{35*OVERSAMPLENR, 266},

{52*OVERSAMPLENR, 239},

{69*OVERSAMPLENR, 221},

{86*OVERSAMPLENR, 208},

{103*OVERSAMPLENR, 197},

{120*OVERSAMPLENR, 188},

{137*OVERSAMPLENR, 181},

{154*OVERSAMPLENR, 174},

{171*OVERSAMPLENR, 169},

{188*OVERSAMPLENR, 163},

{205*OVERSAMPLENR, 159},

{222*OVERSAMPLENR, 154},

{239*OVERSAMPLENR, 150},

{256*OVERSAMPLENR, 147},

{273*OVERSAMPLENR, 143},

{290*OVERSAMPLENR, 140},

{307*OVERSAMPLENR, 136},

{324*OVERSAMPLENR, 133},

{341*OVERSAMPLENR, 130},

{358*OVERSAMPLENR, 128},

{375*OVERSAMPLENR, 125},

{392*OVERSAMPLENR, 122},

{409*OVERSAMPLENR, 120},

{426*OVERSAMPLENR, 117},

{443*OVERSAMPLENR, 115},

{460*OVERSAMPLENR, 112},

{477*OVERSAMPLENR, 110},

{494*OVERSAMPLENR, 108},

{511*OVERSAMPLENR, 106},

{528*OVERSAMPLENR, 103},

{545*OVERSAMPLENR, 101},

{562*OVERSAMPLENR, 99},

{579*OVERSAMPLENR, 97},

{596*OVERSAMPLENR, 95},

{613*OVERSAMPLENR, 92},

{630*OVERSAMPLENR, 90},

{647*OVERSAMPLENR, 88},

{664*OVERSAMPLENR, 86},

{681*OVERSAMPLENR, 84},

{698*OVERSAMPLENR, 81},

{715*OVERSAMPLENR, 79},

{732*OVERSAMPLENR, 77},

{749*OVERSAMPLENR, 75},

{766*OVERSAMPLENR, 72},

{783*OVERSAMPLENR, 70},

{800*OVERSAMPLENR, 67},

{817*OVERSAMPLENR, 64},

{834*OVERSAMPLENR, 61},

{851*OVERSAMPLENR, 58},

{868*OVERSAMPLENR, 55},

{885*OVERSAMPLENR, 52},

{902*OVERSAMPLENR, 48},

{919*OVERSAMPLENR, 44},

{936*OVERSAMPLENR, 40},

{953*OVERSAMPLENR, 34},

{970*OVERSAMPLENR, 28},

{987*OVERSAMPLENR, 20},

{1004*OVERSAMPLENR, 8},

{1021*OVERSAMPLENR, 0}

};

#endif

#if (THERMISTORHEATER_0 == 6) || (THERMISTORHEATER_1 == 6) || (THERMISTORHEATER_2 == 6) || (THERMISTORBED == 6) // 100k Epcos thermistor

const short temptable_6[][2] PROGMEM = {

{28*OVERSAMPLENR, 250},

{31*OVERSAMPLENR, 245},

{35*OVERSAMPLENR, 240},

{39*OVERSAMPLENR, 235},

{42*OVERSAMPLENR, 230},

{44*OVERSAMPLENR, 225},

{49*OVERSAMPLENR, 220},

{53*OVERSAMPLENR, 215},

{62*OVERSAMPLENR, 210},

{73*OVERSAMPLENR, 205},

{72*OVERSAMPLENR, 200},

{94*OVERSAMPLENR, 190},

{102*OVERSAMPLENR, 185},

{116*OVERSAMPLENR, 170},

{143*OVERSAMPLENR, 160},

{183*OVERSAMPLENR, 150},

{223*OVERSAMPLENR, 140},

{270*OVERSAMPLENR, 130},

{318*OVERSAMPLENR, 120},

{383*OVERSAMPLENR, 110},

{413*OVERSAMPLENR, 105},

{439*OVERSAMPLENR, 100},

{484*OVERSAMPLENR, 95},

{513*OVERSAMPLENR, 90},

{607*OVERSAMPLENR, 80},

{664*OVERSAMPLENR, 70},

{781*OVERSAMPLENR, 60},

{810*OVERSAMPLENR, 55},

{849*OVERSAMPLENR, 50},

{914*OVERSAMPLENR, 45},

{914*OVERSAMPLENR, 40},

{935*OVERSAMPLENR, 35},

{954*OVERSAMPLENR, 30},

{970*OVERSAMPLENR, 25},

{978*OVERSAMPLENR, 22},

{1008*OVERSAMPLENR, 3}

};

#endif

#if (THERMISTORHEATER_0 == 7) || (THERMISTORHEATER_1 == 7) || (THERMISTORHEATER_2 == 7) || (THERMISTORBED == 7) // 100k Honeywell 135-104LAG-J01

const short temptable_7[][2] PROGMEM = {

{46*OVERSAMPLENR, 270},

{50*OVERSAMPLENR, 265},

{54*OVERSAMPLENR, 260},

{58*OVERSAMPLENR, 255},

{62*OVERSAMPLENR, 250},

{67*OVERSAMPLENR, 245},

{72*OVERSAMPLENR, 240},

{79*OVERSAMPLENR, 235},

{85*OVERSAMPLENR, 230},

{91*OVERSAMPLENR, 225},

{99*OVERSAMPLENR, 220},

{107*OVERSAMPLENR, 215},

{116*OVERSAMPLENR, 210},

{126*OVERSAMPLENR, 205},

{136*OVERSAMPLENR, 200},

{149*OVERSAMPLENR, 195},

{160*OVERSAMPLENR, 190},

{175*OVERSAMPLENR, 185},

{191*OVERSAMPLENR, 180},

{209*OVERSAMPLENR, 175},

{224*OVERSAMPLENR, 170},

{246*OVERSAMPLENR, 165},

{267*OVERSAMPLENR, 160},

{293*OVERSAMPLENR, 155},

{316*OVERSAMPLENR, 150},

{340*OVERSAMPLENR, 145},

{364*OVERSAMPLENR, 140},

{396*OVERSAMPLENR, 135},

{425*OVERSAMPLENR, 130},

{460*OVERSAMPLENR, 125},

{489*OVERSAMPLENR, 120},

{526*OVERSAMPLENR, 115},

{558*OVERSAMPLENR, 110},

{591*OVERSAMPLENR, 105},

{628*OVERSAMPLENR, 100},

{660*OVERSAMPLENR, 95},

{696*OVERSAMPLENR, 90},

{733*OVERSAMPLENR, 85},

{761*OVERSAMPLENR, 80},

{794*OVERSAMPLENR, 75},

{819*OVERSAMPLENR, 70},

{847*OVERSAMPLENR, 65},

{870*OVERSAMPLENR, 60},

{892*OVERSAMPLENR, 55},

{911*OVERSAMPLENR, 50},

{929*OVERSAMPLENR, 45},

{944*OVERSAMPLENR, 40},

{959*OVERSAMPLENR, 35},

{971*OVERSAMPLENR, 30},

{981*OVERSAMPLENR, 25},

{989*OVERSAMPLENR, 20},

{994*OVERSAMPLENR, 15},

{1001*OVERSAMPLENR, 10},

{1005*OVERSAMPLENR, 5}

};

#endif

#define _TT_NAME(_N) temptable_ ## _N

#define TT_NAME(_N) _TT_NAME(_N)

#ifdef THERMISTORHEATER_0

#define heater_0_temptable TT_NAME(THERMISTORHEATER_0)

#define heater_0_temptable_len (sizeof(heater_0_temptable)/sizeof(*heater_0_temptable))

#else

#ifdef HEATER_0_USES_THERMISTOR

#error No heater 0 thermistor table specified

#else // HEATER_0_USES_THERMISTOR

#define heater_0_temptable 0

#define heater_0_temptable_len 0

#endif // HEATER_0_USES_THERMISTOR

#endif

#ifdef THERMISTORHEATER_1

#define heater_1_temptable TT_NAME(THERMISTORHEATER_1)

#define heater_1_temptable_len (sizeof(heater_1_temptable)/sizeof(*heater_1_temptable))

#else

#ifdef HEATER_1_USES_THERMISTOR

#error No heater 1 thermistor table specified

#else // HEATER_1_USES_THERMISTOR

#define heater_1_temptable 0

#define heater_1_temptable_len 0

#endif // HEATER_1_USES_THERMISTOR

#endif

#ifdef THERMISTORHEATER_2

#define heater_2_temptable TT_NAME(THERMISTORHEATER_2)

#define heater_2_temptable_len (sizeof(heater_2_temptable)/sizeof(*heater_2_temptable))

#else

#ifdef HEATER_2_USES_THERMISTOR

#error No heater 2 thermistor table specified

#else // HEATER_2_USES_THERMISTOR

#define heater_2_temptable 0

#define heater_2_temptable_len 0

#endif // HEATER_2_USES_THERMISTOR

#endif

#ifdef THERMISTORBED

#define bedtemptable TT_NAME(THERMISTORBED)

#define bedtemptable_len (sizeof(bedtemptable)/sizeof(*bedtemptable))

#else

#ifdef BED_USES_THERMISTOR

#error No bed thermistor table specified

#endif // BED_USES_THERMISTOR

#endif

#endif //THERMISTORTABLES_H_

<ramps14test.ino>

#include "thermistortables.h"

#define X_STEP_PIN 54

#define X_DIR_PIN 55

#define X_ENABLE_PIN 38

#define X_MIN_PIN 3

#define X_MAX_PIN 2

#define Y_STEP_PIN 60

#define Y_DIR_PIN 61

#define Y_ENABLE_PIN 56

#define Y_MIN_PIN 14

#define Y_MAX_PIN 15

#define Z_STEP_PIN 46

#define Z_DIR_PIN 48

#define Z_ENABLE_PIN 62

#define Z_MIN_PIN 18

#define Z_MAX_PIN 19

#define E_STEP_PIN 26

#define E_DIR_PIN 28

#define E_ENABLE_PIN 24

#define Q_STEP_PIN 36

#define Q_DIR_PIN 34

#define Q_ENABLE_PIN 30

#define SDPOWER -1

#define EXTRUDERS 3

#define TEMP_SENSOR_AD595_OFFSET 0.0

#define TEMP_SENSOR_AD595_GAIN 1.0

#define THERMISTORHEATER_0 1

#define THERMISTORHEATER_1 1

#define THERMISTORHEATER_2 1

#define HEATER_0_USES_THERMISTOR 1

#define HEATER_1_USES_THERMISTOR 1

#define HEATER_2_USES_THERMISTOR 1

static void *heater_ttbl_map[EXTRUDERS] = { (void *)heater_0_temptable

#if EXTRUDERS > 1

, (void *)heater_1_temptable

#endif

#if EXTRUDERS > 2

, (void *)heater_2_temptable

#endif

#if EXTRUDERS > 3

#error Unsupported number of extruders

#endif

};

static int heater_ttbllen_map[EXTRUDERS] = { heater_0_temptable_len

#if EXTRUDERS > 1

, heater_1_temptable_len

#endif

#if EXTRUDERS > 2

, heater_2_temptable_len

#endif

#if EXTRUDERS > 3

#error Unsupported number of extruders

#endif

};

#define PGM_RD_W(x) (short)pgm_read_word(&x)

#define SDSS 53

#define LED_PIN 13

#define FAN_PIN 9

#define PS_ON_PIN 12

#define KILL_PIN -1

#define HEATER_0_PIN 10

#define HEATER_1_PIN 8

#define TEMP_0_PIN 15 // ANALOG NUMBERING

#define TEMP_1_PIN 14 // ANALOG NUMBERING

#define TEMP_2_PIN 13 // ANALOG NUMBERING

void setup() {

pinMode(TEMP_0_PIN , INPUT);

pinMode(TEMP_1_PIN , INPUT);

pinMode(TEMP_2_PIN , INPUT);

pinMode(FAN_PIN , OUTPUT);

pinMode(HEATER_0_PIN , OUTPUT);

pinMode(HEATER_1_PIN , OUTPUT);

pinMode(LED_PIN , OUTPUT);

pinMode(X_STEP_PIN , OUTPUT);

pinMode(X_DIR_PIN , OUTPUT);

pinMode(X_ENABLE_PIN , OUTPUT);

pinMode(Y_STEP_PIN , OUTPUT);

pinMode(Y_DIR_PIN , OUTPUT);

pinMode(Y_ENABLE_PIN , OUTPUT);

pinMode(Z_STEP_PIN , OUTPUT);

pinMode(Z_DIR_PIN , OUTPUT);

pinMode(Z_ENABLE_PIN , OUTPUT);

pinMode(E_STEP_PIN , OUTPUT);

pinMode(E_DIR_PIN , OUTPUT);

pinMode(E_ENABLE_PIN , OUTPUT);

pinMode(Q_STEP_PIN , OUTPUT);

pinMode(Q_DIR_PIN , OUTPUT);

pinMode(Q_ENABLE_PIN , OUTPUT);

digitalWrite(X_ENABLE_PIN , LOW);

digitalWrite(Y_ENABLE_PIN , LOW);

digitalWrite(Z_ENABLE_PIN , LOW);

digitalWrite(E_ENABLE_PIN , LOW);

digitalWrite(Q_ENABLE_PIN , LOW);

Serial.begin(115200);

}

float analog2temp(int raw, uint8_t e) {

#ifdef HEATER_0_USES_MAX6675

if (e == 0)

{

return 0.25 * raw;

}

#endif

if(heater_ttbl_map[e] != 0)

{

float celsius = 0;

byte i;

short (*tt)[][2] = (short (*)[][2])(heater_ttbl_map[e]);

raw = (1023 * OVERSAMPLENR) - raw;

for (i=1; i<heater_ttbllen_map[e]; i++)

{

if ((PGM_RD_W((*tt)[i][0]) > raw) && ((float)(PGM_RD_W((*tt)[i][0]) - PGM_RD_W((*tt)[i-1][0])) >0))

{

celsius = PGM_RD_W((*tt)[i-1][1]) +

(raw - PGM_RD_W((*tt)[i-1][0])) *

(float)(PGM_RD_W((*tt)[i][1]) - PGM_RD_W((*tt)[i-1][1])) /

(float)(PGM_RD_W((*tt)[i][0]) - PGM_RD_W((*tt)[i-1][0]));

break;

}

// Overflow: Set to last value in the table

if (i == heater_ttbllen_map[e]) celsius = PGM_RD_W((*tt)[i-1][1]);

return celsius;

}

return ((raw * ((5.0 * 100.0) / 1024.0) / OVERSAMPLENR) * TEMP_SENSOR_AD595_GAIN) + TEMP_SENSOR_AD595_OFFSET;

}

unsigned long prevMillis;

void loop () {

if (millis() %1000 <500)

digitalWrite(LED_PIN, HIGH);

else

digitalWrite(LED_PIN, LOW);

if (millis() %1000 <300) {

digitalWrite(HEATER_0_PIN, HIGH);

digitalWrite(HEATER_1_PIN, LOW);

digitalWrite(FAN_PIN, LOW);

} else if (millis() %1000 <600) {

digitalWrite(HEATER_0_PIN, LOW);

digitalWrite(HEATER_1_PIN, HIGH);

digitalWrite(FAN_PIN, LOW);

} else {

digitalWrite(HEATER_0_PIN, LOW);

digitalWrite(HEATER_1_PIN, LOW);

digitalWrite(FAN_PIN, HIGH);

}

if (millis() %2000 <1000) {

digitalWrite(X_DIR_PIN , HIGH);

digitalWrite(Y_DIR_PIN , HIGH);

digitalWrite(Z_DIR_PIN , HIGH);

digitalWrite(E_DIR_PIN , HIGH);

digitalWrite(Q_DIR_PIN , HIGH);

}

else {

digitalWrite(X_DIR_PIN , LOW);

digitalWrite(Y_DIR_PIN , LOW);

digitalWrite(Z_DIR_PIN , LOW);

digitalWrite(E_DIR_PIN , LOW);

digitalWrite(Q_DIR_PIN , LOW);

}

digitalWrite(X_STEP_PIN , HIGH);

digitalWrite(Y_STEP_PIN , HIGH);

digitalWrite(Z_STEP_PIN , HIGH);

digitalWrite(E_STEP_PIN , HIGH);

digitalWrite(Q_STEP_PIN , HIGH);

delay(1);

digitalWrite(X_STEP_PIN , LOW);

digitalWrite(Y_STEP_PIN , LOW);

digitalWrite(Z_STEP_PIN , LOW);

digitalWrite(E_STEP_PIN , LOW);

digitalWrite(Q_STEP_PIN , LOW);

if (millis() -prevMillis >500){

prevMillis=millis();

int t = analogRead( TEMP_0_PIN);

Serial.print("T0 ");

Serial.print(t);

Serial.print("/");

Serial.print(analog2temp(1024 - t,0),0);

Serial.print(" T1 ");

t = analogRead( TEMP_1_PIN);

Serial.print(t);

Serial.print("/");

Serial.print(analog2temp(1024 - t,1),0);

Serial.print(" T2 ");

t = analogRead( TEMP_2_PIN);

Serial.print(t);

Serial.print("/");

Serial.println(analog2temp(1024 - t,2),0);

}

Step 3: Connect Mechanical End Stops

Mechanical end stops come in two varieties: two pin and three pin. In this tutorial, we use three pin end stops, but the installation for two pin end stops is much the same. For three pin end stops, plug the green signal wire into the S pin on ramps, the black ground wire into negative, and the red positive wire into positive.

Figure 3: Mechanical Endstop connection

For two pin end stops, plug the red positive wire into the S pin on RAMPS and the black ground wire into negative. There should be 6 end stops: a maximum and a minimum for each axis. Figure 4 shows the RAMPS board after they are all connected.

Figure 4: Mechanical EndStops Connection to RAMPS

The placement of the end stops may require some trial and error to find the perfect placement.

Step 4: Connecting the Screen

Take out your full graphic smart controller. Connect the two ribbon cables with the screen and the expansion board. Press the expansion board onto the tail end of ramps. Tape the screen onto the milk crate in a place that is out of the way of the mechanisms. Figure 5 below shows how thing are set up.

Figure 5: View of Screen Placement

Step 5: Download and Configure Marlin

The Marlin Firmware is used to run the printer, rather than writing the entire code. It converts files into G-code, levels your print bed, and creates a user-friendly interface. The Marlin Firmware can be found here: https://github.com/MarlinFirmware/Marlin. Download the file and open it in the Arduino IDE.

Marlin can be used for many different applications, like RAMPS. As a result, there is some configuration we need to do.

First, let’s tell it what board we are using. This tutorial is written assuming that you are using RAMPS 1.4. If you are using another board, check the boards.h file in Marlin for the proper variable for your board. Open the Configuration.h file in Marlin.

Search for this line: #define MOTHERBOARD. Remove the initial condition and input 43, the number associated with the RAMPS 1.4 EFB board.

Search for this phrase: #define CUSTOM_MACHINE_NAME “3D Printer”. Change the machine name if you’d like.

Search for this phrase: #define MACHINE_UUID “00000000-0000-0000-0000-000000000000”. Change the UUID to a randomly generated UUID so that it can be a unique address for Bluetooth communication.

Search for this phrase: #define EXTRUDERS 1. Make sure this is set to one if you are using one extruder and 2 if you are using 2. Additionally, in this section, you can define other parameters for secondary extruders.

Search for this phrase: #define POWER_SUPPLY 1. If you are using an OEM power supply, replace the 1 with a zero. If you are using an ATX, keep the one. See the documentation for other power sources.

Search for this phrase: #define TEMP_SENSOR_0. This defines your thermistor resistance for the extruder. Most are 100 K and should be defined as 1. Check your documentation for the resistance value for your thermistor. The rest of the section can define all the rest of the thermistors that you may use.

Search for this phrase: #define HEATER_0_MINTEMP. This section decides the safe temperature ranges for the hot end. Make sure this section contains safe values.

Search for this phrase: #define EXTRUDE_MINTEMP 170. This means the printer will not move if the extruder is less than 170 degrees Celsius. This is important to remember if you have a thermistor problem.

Search for this phrase: #define THERMAL_PROTECTION_HOTENDS. Uncomment this line to enable a more intelligent heat control. This feature measures the temperature with the thermistor and then sets a timer. If the temperature has gone up significantly since that measurement, it stops the print. This protects against loose thermistors that can cause the printer to overheat.

Search for the phrase: #define COREXY. This is the name of the belt configuration that is used in this tutorial. There are other special configurations that can also be set in this section.

Search for this phrase: #define INVERT_X_DIR. This section allows you to change the direction of any axis. It may be useful for debugging.

Search for this phrase: #define DEFAULT_AXIS_STEPS_PER_UNIT. This section is a critical part of the configuration process and allows you to set the number of steps per unit length. This is dependent on your timing pulleys, threaded rods, and extruder style. For this tutorial, we used: G2T timing belts and pulleys, an Mk8 extruder style, and an 8mm pitch thread screw. This means that the values we need to enter are: 78.74, 78.74, 2560, and 95.

Search for the phrase: #define EEPROM_SETTINGS. Make sure this is enabled. It allows you to change firmware settings without reloading the firmware.

Search for the phrase: #define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en). This chooses the language of the user interface. Make sure it is set to your preferred language using the language.h file.

Search for the phrase: #define SDSUPPORT. Uncomment this so that you can use the SD card slot on the smart controller to print. This makes the printer a separate system from your computer.

Search for the phrase: #define REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER. Uncomment this so that you can use the smart controller used in this tutorial. If you decided to use another controller, search for it in the list and uncomment it instead.

Finally, upload your code and test it. Click the button to display the menu. Navigate to the Prepare menu. Navigate to move axis. Make sure you test every axis. The video below will show the proper result of testing.

Step 6: Finishing Touches

Clamp down the edges of the top plate. Make sure all your cables are correctly plugged in and dealt with.

Make sure all your axes are zeroed to their minimums.

Make sure all the components work. Tweak any settings as you see fit.

Step 7: Your First Print

Now, you’re ready for your first 3D print. Download the 3D printing slicing program Cura at this link: https://ultimaker.com/en/products/cura-software.

Once it is downloaded, open the program and configure it for your printer. Choose custom FDM printer. Input the maximum build size: 105mm x 130mm x 80mm. Use a ruler to measure the other inputs. Make sure the Gcode flavor is RepRap Marlin.

Now, all you need is an SD card loaded with the STL file you want to print. I recommend you start by, in the spirit of RepRap, printing parts to improve this printer.

Click here to read Part 1: Build >

Click here to read Part 2: Code >

Lyndsey Mandelare

Lyndsey is currently studying Mechanical Engineering. She has a keen interest in 3D modeling and fabrication. Besides 3D printing, she also has experience with various microcontrollers.