Do It Yourself Digital Read Out

Make your own custom DRO that measures distance for lathes, milling machines, woodworking tools, cut-off saws and other purposes.

Dec 26, 2019

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internet of things

Components and supplies

Alphanumeric LCD, 20 x 4

Sensor Cable, Encoder

Arduino UNO

Apps and platforms

Arduino IDE

Project description

Code

X and Z Axis

text

These are the sketches for measuring distances in my DRO project and displaying the results on a LCD screen

1// Z Axis Sketch 
2
3// James Rovere 2019 Z Axis
4// A Digital Readout   using a quaduture rotary encoder,an IC2 LCD display
5// and a GT2-16 pulley, 16   teeth spaced 2 mm apart; .37" outside Diameter.
6#include <Encoder.h>// Encoder   library.
7Encoder myEnc(2,3);// Connected to Digital pins 2 and 3.
8#include   <LiquidCrystal_I2C.h> //IC2 LCD library.
9LiquidCrystal_I2C lcd(0x27, 2, 1, 0,   4, 5, 6, 7, 3, POSITIVE);
10
11void setup() {
12  lcd.begin(20, 4); // My display   has 20 Columns, 4 Rows.
13}
14long oldPosition = -999;
15void loop() {
16  const   float Wv = (.1 * PI) / 600; // Math formula for .37" diameter pulley
17                                    //and   600 pulse/revolution encoder.
18
19  lcd.setCursor(7, 0); // (Column 7,ROW 0)   (Column #0-19,Row #0-3)
20  lcd.print("Z Axis");
21  lcd.setCursor(2, 1);
22   lcd.print("inch");
23  lcd.setCursor(14, 1);
24  lcd.print("mm");
25  lcd.setCursor(8,   2);
26  lcd.print("<->");// Graphic symbols for a Z axis left and right travel.
27   long newPosition = myEnc.read();
28  if (newPosition != oldPosition)
29  lcd.setCursor   (0, 0);
30  lcd.print (newPosition); // Display number of pulses, 1"~=1902.2 pulses.                        
31  lcd.setCursor(2, 3);
32  lcd.print(Wv * newPosition,   3);//Math formula * Encoder reading ,3 decimals
33  lcd.setCursor(9, 1);
34  lcd.print("|");//   Graphic symbol to separate imperial and metric display.
35  lcd.setCursor(9, 3);
36   lcd.print("|");
37  lcd.setCursor(11, 3);
38  lcd.print(Wv * newPosition *   25.4, 2); // Formula to convert imperial
39                                         //   and metric, 2 decimals.
40}
41
42
43// ______________________________________________________________________
44
45//   X Axis Sketch
46
47// James Rovere 2019 Lathe X Axis
48// A Digital Readout using   a quaduture rotary encoder,an IC2 LCD display
49// and a GT2-16 pulley, 16 teeth   spaced 2 mm apart; .37 outside Diameter.
50#include <Encoder.h>// Encoder library.
51Encoder   myEnc(2, 3);// Connected to Digital pins 2 and 3.
52#include <LiquidCrystal_I2C.h>   //IC2 LCD library.
53LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
54   
55void setup() {
56  lcd.begin(20,4);// 20 Columns, 4 Rows.
57  }
58long oldPosition=   -999;
59  
60  
61void loop() {
62  const float Wv =(.1 * PI)/600; // Formula   to set the linear distance travelled in one pulse.
63    
64    lcd.setCursor(8,0);   //(Column 8, Row 0)
65    lcd.print("X Axis");
66    lcd.setCursor(3,1);
67     lcd.print("inch");
68    lcd.setCursor(14,1);
69    lcd.print("mm");
70     lcd.setCursor(9,1);
71    lcd.print(":");
72    lcd.setCursor(9,2);
73     lcd.print("|");
74    lcd.setCursor(9,3);
75    lcd.print(":");
76    lcd.setCursor(3,2);
77     lcd.print("D");
78  long newPosition = myEnc.read();
79  if (newPosition   != oldPosition)
80    lcd.setCursor (0,0);
81    lcd.print (newPosition);// Display   pulse count.   
82    lcd.setCursor(2,2);
83    lcd.print(Wv*newPosition*2,3);//Diameter   multiply by 2, 3 decimal places
84    lcd.setCursor(0,2);
85    lcd.print("D");
86     lcd.setCursor(11,2);
87    lcd.print("D");
88    lcd.setCursor(11,3);
89     lcd.print("R");
90    lcd.setCursor(0,3 );
91    lcd.print("R");
92    lcd.setCursor(13,2);
93     lcd.print(Wv*newPosition*25.4*2,2);// mm Diameter multiply by 2, 2     //decimal   places.
94    lcd.setCursor(2,3);
95    lcd.print(Wv*newPosition,3);// inch Raidius   of workpiece.
96    lcd.setCursor(13,3);
97    lcd.print(Wv*newPosition*25.4,2);//   mm Raidius of workpiece.
98          
99}

// Z Axis Sketch 

// James Rovere 2019 Z Axis
// A Digital Readout   using a quaduture rotary encoder,an IC2 LCD display
// and a GT2-16 pulley, 16   teeth spaced 2 mm apart; .37" outside Diameter.
#include <Encoder.h>// Encoder   library.
Encoder myEnc(2,3);// Connected to Digital pins 2 and 3.
#include   <LiquidCrystal_I2C.h> //IC2 LCD library.
LiquidCrystal_I2C lcd(0x27, 2, 1, 0,   4, 5, 6, 7, 3, POSITIVE);

void setup() {
  lcd.begin(20, 4); // My display   has 20 Columns, 4 Rows.
}
long oldPosition = -999;
void loop() {
  const   float Wv = (.1 * PI) / 600; // Math formula for .37" diameter pulley
                                    //and   600 pulse/revolution encoder.

  lcd.setCursor(7, 0); // (Column 7,ROW 0)   (Column #0-19,Row #0-3)
  lcd.print("Z Axis");
  lcd.setCursor(2, 1);
   lcd.print("inch");
  lcd.setCursor(14, 1);
  lcd.print("mm");
  lcd.setCursor(8,   2);
  lcd.print("<->");// Graphic symbols for a Z axis left and right travel.
   long newPosition = myEnc.read();
  if (newPosition != oldPosition)
  lcd.setCursor   (0, 0);
  lcd.print (newPosition); // Display number of pulses, 1"~=1902.2 pulses.                        
  lcd.setCursor(2, 3);
  lcd.print(Wv * newPosition,   3);//Math formula * Encoder reading ,3 decimals
  lcd.setCursor(9, 1);
  lcd.print("|");//   Graphic symbol to separate imperial and metric display.
  lcd.setCursor(9, 3);
   lcd.print("|");
  lcd.setCursor(11, 3);
  lcd.print(Wv * newPosition *   25.4, 2); // Formula to convert imperial
                                         //   and metric, 2 decimals.
}


// ______________________________________________________________________

//   X Axis Sketch

// James Rovere 2019 Lathe X Axis
// A Digital Readout using   a quaduture rotary encoder,an IC2 LCD display
// and a GT2-16 pulley, 16 teeth   spaced 2 mm apart; .37 outside Diameter.
#include <Encoder.h>// Encoder library.
Encoder   myEnc(2, 3);// Connected to Digital pins 2 and 3.
#include <LiquidCrystal_I2C.h>   //IC2 LCD library.
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
   
void setup() {
  lcd.begin(20,4);// 20 Columns, 4 Rows.
  }
long oldPosition=   -999;
  
  
void loop() {
  const float Wv =(.1 * PI)/600; // Formula   to set the linear distance travelled in one pulse.
    
    lcd.setCursor(8,0);   //(Column 8, Row 0)
    lcd.print("X Axis");
    lcd.setCursor(3,1);
     lcd.print("inch");
    lcd.setCursor(14,1);
    lcd.print("mm");
     lcd.setCursor(9,1);
    lcd.print(":");
    lcd.setCursor(9,2);
     lcd.print("|");
    lcd.setCursor(9,3);
    lcd.print(":");
    lcd.setCursor(3,2);
     lcd.print("D");
  long newPosition = myEnc.read();
  if (newPosition   != oldPosition)
    lcd.setCursor (0,0);
    lcd.print (newPosition);// Display   pulse count.   
    lcd.setCursor(2,2);
    lcd.print(Wv*newPosition*2,3);//Diameter   multiply by 2, 3 decimal places
    lcd.setCursor(0,2);
    lcd.print("D");
     lcd.setCursor(11,2);
    lcd.print("D");
    lcd.setCursor(11,3);
     lcd.print("R");
    lcd.setCursor(0,3 );
    lcd.print("R");
    lcd.setCursor(13,2);
     lcd.print(Wv*newPosition*25.4*2,2);// mm Diameter multiply by 2, 2     //decimal   places.
    lcd.setCursor(2,3);
    lcd.print(Wv*newPosition,3);// inch Raidius   of workpiece.
    lcd.setCursor(13,3);
    lcd.print(Wv*newPosition*25.4,2);//   mm Raidius of workpiece.
          
}

X and Z Axis

text

These are the sketches for measuring distances in my DRO project and displaying the results on a LCD screen

1// Z Axis Sketch 
2
3// James Rovere 2019 Z Axis
4// A Digital Readout  using a quaduture rotary encoder,an IC2 LCD display
5// and a GT2-16 pulley, 16  teeth spaced 2 mm apart; .37" outside Diameter.
6#include <Encoder.h>// Encoder  library.
7Encoder myEnc(2,3);// Connected to Digital pins 2 and 3.
8#include  <LiquidCrystal_I2C.h> //IC2 LCD library.
9LiquidCrystal_I2C lcd(0x27, 2, 1, 0,  4, 5, 6, 7, 3, POSITIVE);
10
11void setup() {
12  lcd.begin(20, 4); // My display  has 20 Columns, 4 Rows.
13}
14long oldPosition = -999;
15void loop() {
16  const  float Wv = (.1 * PI) / 600; // Math formula for .37" diameter pulley
17                                    //and  600 pulse/revolution encoder.
18
19  lcd.setCursor(7, 0); // (Column 7,ROW 0)  (Column #0-19,Row #0-3)
20  lcd.print("Z Axis");
21  lcd.setCursor(2, 1);
22  lcd.print("inch");
23  lcd.setCursor(14, 1);
24  lcd.print("mm");
25  lcd.setCursor(8,  2);
26  lcd.print("<->");// Graphic symbols for a Z axis left and right travel.
27  long newPosition = myEnc.read();
28  if (newPosition != oldPosition)
29  lcd.setCursor  (0, 0);
30  lcd.print (newPosition); // Display number of pulses, 1"~=1902.2 pulses.                       
31  lcd.setCursor(2, 3);
32  lcd.print(Wv * newPosition,  3);//Math formula * Encoder reading ,3 decimals
33  lcd.setCursor(9, 1);
34  lcd.print("|");//  Graphic symbol to separate imperial and metric display.
35  lcd.setCursor(9, 3);
36  lcd.print("|");
37  lcd.setCursor(11, 3);
38  lcd.print(Wv * newPosition *  25.4, 2); // Formula to convert imperial
39                                         //  and metric, 2 decimals.
40}
41
42
43// ______________________________________________________________________
44
45//  X Axis Sketch
46
47// James Rovere 2019 Lathe X Axis
48// A Digital Readout using  a quaduture rotary encoder,an IC2 LCD display
49// and a GT2-16 pulley, 16 teeth  spaced 2 mm apart; .37 outside Diameter.
50#include <Encoder.h>// Encoder library.
51Encoder  myEnc(2, 3);// Connected to Digital pins 2 and 3.
52#include <LiquidCrystal_I2C.h>  //IC2 LCD library.
53LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
54  
55void setup() {
56  lcd.begin(20,4);// 20 Columns, 4 Rows.
57  }
58long oldPosition=  -999;
59  
60  
61void loop() {
62  const float Wv =(.1 * PI)/600; // Formula  to set the linear distance travelled in one pulse.
63    
64    lcd.setCursor(8,0);  //(Column 8, Row 0)
65    lcd.print("X Axis");
66    lcd.setCursor(3,1);
67    lcd.print("inch");
68    lcd.setCursor(14,1);
69    lcd.print("mm");
70    lcd.setCursor(9,1);
71    lcd.print(":");
72    lcd.setCursor(9,2);
73    lcd.print("|");
74    lcd.setCursor(9,3);
75    lcd.print(":");
76    lcd.setCursor(3,2);
77    lcd.print("D");
78  long newPosition = myEnc.read();
79  if (newPosition  != oldPosition)
80    lcd.setCursor (0,0);
81    lcd.print (newPosition);// Display  pulse count.   
82    lcd.setCursor(2,2);
83    lcd.print(Wv*newPosition*2,3);//Diameter  multiply by 2, 3 decimal places
84    lcd.setCursor(0,2);
85    lcd.print("D");
86    lcd.setCursor(11,2);
87    lcd.print("D");
88    lcd.setCursor(11,3);
89    lcd.print("R");
90    lcd.setCursor(0,3 );
91    lcd.print("R");
92    lcd.setCursor(13,2);
93    lcd.print(Wv*newPosition*25.4*2,2);// mm Diameter multiply by 2, 2     //decimal  places.
94    lcd.setCursor(2,3);
95    lcd.print(Wv*newPosition,3);// inch Raidius  of workpiece.
96    lcd.setCursor(13,3);
97    lcd.print(Wv*newPosition*25.4,2);//  mm Raidius of workpiece.
98          
99}

// Z Axis Sketch 

// James Rovere 2019 Z Axis
// A Digital Readout  using a quaduture rotary encoder,an IC2 LCD display
// and a GT2-16 pulley, 16  teeth spaced 2 mm apart; .37" outside Diameter.
#include <Encoder.h>// Encoder  library.
Encoder myEnc(2,3);// Connected to Digital pins 2 and 3.
#include  <LiquidCrystal_I2C.h> //IC2 LCD library.
LiquidCrystal_I2C lcd(0x27, 2, 1, 0,  4, 5, 6, 7, 3, POSITIVE);

void setup() {
  lcd.begin(20, 4); // My display  has 20 Columns, 4 Rows.
}
long oldPosition = -999;
void loop() {
  const  float Wv = (.1 * PI) / 600; // Math formula for .37" diameter pulley
                                    //and  600 pulse/revolution encoder.

  lcd.setCursor(7, 0); // (Column 7,ROW 0)  (Column #0-19,Row #0-3)
  lcd.print("Z Axis");
  lcd.setCursor(2, 1);
  lcd.print("inch");
  lcd.setCursor(14, 1);
  lcd.print("mm");
  lcd.setCursor(8,  2);
  lcd.print("<->");// Graphic symbols for a Z axis left and right travel.
  long newPosition = myEnc.read();
  if (newPosition != oldPosition)
  lcd.setCursor  (0, 0);
  lcd.print (newPosition); // Display number of pulses, 1"~=1902.2 pulses.                       
  lcd.setCursor(2, 3);
  lcd.print(Wv * newPosition,  3);//Math formula * Encoder reading ,3 decimals
  lcd.setCursor(9, 1);
  lcd.print("|");//  Graphic symbol to separate imperial and metric display.
  lcd.setCursor(9, 3);
  lcd.print("|");
  lcd.setCursor(11, 3);
  lcd.print(Wv * newPosition *  25.4, 2); // Formula to convert imperial
                                         //  and metric, 2 decimals.
}


// ______________________________________________________________________

//  X Axis Sketch

// James Rovere 2019 Lathe X Axis
// A Digital Readout using  a quaduture rotary encoder,an IC2 LCD display
// and a GT2-16 pulley, 16 teeth  spaced 2 mm apart; .37 outside Diameter.
#include <Encoder.h>// Encoder library.
Encoder  myEnc(2, 3);// Connected to Digital pins 2 and 3.
#include <LiquidCrystal_I2C.h>  //IC2 LCD library.
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
  
void setup() {
  lcd.begin(20,4);// 20 Columns, 4 Rows.
  }
long oldPosition=  -999;
  
  
void loop() {
  const float Wv =(.1 * PI)/600; // Formula  to set the linear distance travelled in one pulse.
    
    lcd.setCursor(8,0);  //(Column 8, Row 0)
    lcd.print("X Axis");
    lcd.setCursor(3,1);
    lcd.print("inch");
    lcd.setCursor(14,1);
    lcd.print("mm");
    lcd.setCursor(9,1);
    lcd.print(":");
    lcd.setCursor(9,2);
    lcd.print("|");
    lcd.setCursor(9,3);
    lcd.print(":");
    lcd.setCursor(3,2);
    lcd.print("D");
  long newPosition = myEnc.read();
  if (newPosition  != oldPosition)
    lcd.setCursor (0,0);
    lcd.print (newPosition);// Display  pulse count.   
    lcd.setCursor(2,2);
    lcd.print(Wv*newPosition*2,3);//Diameter  multiply by 2, 3 decimal places
    lcd.setCursor(0,2);
    lcd.print("D");
    lcd.setCursor(11,2);
    lcd.print("D");
    lcd.setCursor(11,3);
    lcd.print("R");
    lcd.setCursor(0,3 );
    lcd.print("R");
    lcd.setCursor(13,2);
    lcd.print(Wv*newPosition*25.4*2,2);// mm Diameter multiply by 2, 2     //decimal  places.
    lcd.setCursor(2,3);
    lcd.print(Wv*newPosition,3);// inch Raidius  of workpiece.
    lcd.setCursor(13,3);
    lcd.print(Wv*newPosition*25.4,2);//  mm Raidius of workpiece.
          
}

Downloadable files

Encoder wiring diagram

It is a diagram that shows how to connect an encoder to an Arduino UNO.

Encoder wiring diagram

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