Arduino Camshaft Measurement Tool

An Arduino camshaft measurement tool.

Jun 5, 2020

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10 respects

cars

passenger vehicles

data collection

Components and supplies

Nema 17 dual shaft stepper motor

Solid state 5v relay board

Stepper motor controller

Optical end stop

Aluminum extrusion and brackets

3D printed parts and brackets

SPI to HID controller for indicator

Incremental rotary encoder (non essential)

Arduino UNO

Digital Dial indicator with SPI interface

Breadboard (generic)

Shaft couplers (modified to remove play)

Tools and machines

Basic hand tools

3D Printer (generic)

Apps and platforms

Spreadsheet for creating the chart

Project description

Code

Stepper motor pushbutton control

arduino

This is the code to manipulate the stepper motor for aligning the camshaft and making the 360 revolution for taking the measurements. This is modified code originally taken from the web.

1
2#define stp 2
3#define dir 3
4#define MS1 4
5#define MS2 5
6#define  EN  6
7
8const int button1Pin = 7;
9const int button2Pin = 8;
10const int  button3Pin = 9;
11const int ledPin =  13;
12int button1State = 0;
13int button2State  = 0;
14int button3State = 0;
15
16char user_input;
17int x;
18int y;
19int  state;
20
21void setup() {
22  pinMode(ledPin, OUTPUT);
23  pinMode(button1Pin,  INPUT);
24  pinMode(button2Pin, INPUT);
25  pinMode(button3Pin, INPUT);  
26    
27  pinMode(stp, OUTPUT);
28  pinMode(dir, OUTPUT);
29  pinMode(MS1, OUTPUT);
30  pinMode(MS2, OUTPUT);
31  pinMode(EN, OUTPUT);
32  resetEDPins();
33}
34
35void  loop() {
36      button1State = digitalRead(button1Pin);
37      button2State  = digitalRead(button2Pin);
38      button3State = digitalRead(button3Pin);
39      
40      if (button1State == HIGH) {
41        digitalWrite(EN, LOW);
42        StepForward();
43        resetEDPins();
44        delay(250);
45      }  
46
47      if (button2State == HIGH) {
48        digitalWrite(EN, LOW);
49        StepBack();
50        resetEDPins();
51        delay(250);
52      }else  {
53        digitalWrite(ledPin, LOW);
54      }
55
56      if (button3State  == HIGH) {
57        digitalWrite(EN, LOW);
58        aStepBack();
59        resetEDPins();
60        delay(250);
61      }else {
62        digitalWrite(ledPin, LOW);
63      }
64}
65
66void  resetEDPins()
67{
68  digitalWrite(stp, LOW);
69  digitalWrite(dir, LOW);
70  digitalWrite(MS1, LOW);
71  digitalWrite(MS2, LOW);
72  digitalWrite(EN, HIGH);
73}
74
75void  StepForward()
76{
77  digitalWrite(dir, LOW);
78
79  for(x= 1; x<2; x++)
80  {
81        digitalWrite(stp,HIGH);
82        delay(200);
83        digitalWrite(stp,LOW);
84        delay(200);
85    }
86}
87
88void StepBack()
89{
90 digitalWrite(dir,  HIGH);
91  for(x= 1; x<801; x++)
92  {
93    digitalWrite(stp,HIGH);
94    delay(200);
95    digitalWrite(stp,LOW);
96    delay(200);
97  }
98}  
99
100void aStepBack()
101{
102  digitalWrite(dir, HIGH);
103  for(x= 1; x<2; x++)
104  {
105    digitalWrite(stp,HIGH);
106    delay(200);
107    digitalWrite(stp,LOW);
108    delay(200);
109  }  
110
111}
112
113//  56.5 number for 8 reads per sec of indicator
114//    delay(56.5);
115

#define stp 2
#define dir 3
#define MS1 4
#define MS2 5
#define  EN  6

const int button1Pin = 7;
const int button2Pin = 8;
const int  button3Pin = 9;
const int ledPin =  13;
int button1State = 0;
int button2State  = 0;
int button3State = 0;

char user_input;
int x;
int y;
int  state;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(button1Pin,  INPUT);
  pinMode(button2Pin, INPUT);
  pinMode(button3Pin, INPUT);  
    
  pinMode(stp, OUTPUT);
  pinMode(dir, OUTPUT);
  pinMode(MS1, OUTPUT);
  pinMode(MS2, OUTPUT);
  pinMode(EN, OUTPUT);
  resetEDPins();
}

void  loop() {
      button1State = digitalRead(button1Pin);
      button2State  = digitalRead(button2Pin);
      button3State = digitalRead(button3Pin);
      
      if (button1State == HIGH) {
        digitalWrite(EN, LOW);
        StepForward();
        resetEDPins();
        delay(250);
      }  

      if (button2State == HIGH) {
        digitalWrite(EN, LOW);
        StepBack();
        resetEDPins();
        delay(250);
      }else  {
        digitalWrite(ledPin, LOW);
      }

      if (button3State  == HIGH) {
        digitalWrite(EN, LOW);
        aStepBack();
        resetEDPins();
        delay(250);
      }else {
        digitalWrite(ledPin, LOW);
      }
}

void  resetEDPins()
{
  digitalWrite(stp, LOW);
  digitalWrite(dir, LOW);
  digitalWrite(MS1, LOW);
  digitalWrite(MS2, LOW);
  digitalWrite(EN, HIGH);
}

void  StepForward()
{
  digitalWrite(dir, LOW);

  for(x= 1; x<2; x++)
  {
        digitalWrite(stp,HIGH);
        delay(200);
        digitalWrite(stp,LOW);
        delay(200);
    }
}

void StepBack()
{
 digitalWrite(dir,  HIGH);
  for(x= 1; x<801; x++)
  {
    digitalWrite(stp,HIGH);
    delay(200);
    digitalWrite(stp,LOW);
    delay(200);
  }
}  

void aStepBack()
{
  digitalWrite(dir, HIGH);
  for(x= 1; x<2; x++)
  {
    digitalWrite(stp,HIGH);
    delay(200);
    digitalWrite(stp,LOW);
    delay(200);
  }  

}

//  56.5 number for 8 reads per sec of indicator
//    delay(56.5);

Downloadable files

Chart showing a comparison of lobe profiles

some pretty basic wiring

this is a pic of the wiring, it is very basic

some pretty basic wiring

Chart showing a comparison of lobe profiles

some pretty basic wiring

this is a pic of the wiring, it is very basic

some pretty basic wiring

Documentation

basic mechanical setup

basic mechanical setup I posted a video of this in operation https://www.youtube.com/watch?v=oWigCN4UOSY

basic mechanical setup

basic mechanical setup I posted a video of this in operation https://www.youtube.com/watch?v=oWigCN4UOSY

basic mechanical setup

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