Hello Experts,
I have a code for moving the stepper motors of a 3d printer. In one part of the code, I can chose to move one stepper motor by pressing a button. In other part of the code (homing), the same stepper needs to be moved, and I used the same function. The problem is, the speeds are not the same: the "homing" speed is way, way slower.
I am using an Arduino Mega with LCD Keypad Shield. Here is the part of the code that the stepper goes "fast":
void menuItem1() { // Function executes when you select the 2nd item from main menu
int activeButton = 0;
lcd.clear();
lcd.setCursor(1, 0);
lcd.print("Move X Axis");
while (activeButton == 0) {
int button;
readKey = analogRead(0);
if (readKey < 790) {
delayMicroseconds(1000);
readKey = analogRead(0);
}
button = evaluateButton(readKey);
switch (button) {
case 0: // When button returns as 0
break;
case 1: // When button returns as 1
lcd.clear();
lcd.print("Press Up or Down");
lcd.setCursor(0, 1);
break;
case 2: // When button returns as 2
valXUp = digitalRead(LimitSwitchXUp); // read sensor
if (valXUp == HIGH) {
MoveAxisUp (Xdir, Xstep);
}
break;
case 3: // When button returns as 3
valXDown = digitalRead(LimitSwitchXDown); // read sensor
if (valXDown == HIGH) {
MoveAxisDown (Xdir, Xstep);
break;
}
break;
case 4: // This case will execute if the "back" button is pressed
button = 0;
activeButton = 1;
break;
}
}
}
In this case, the X axis will move with this MoveAxisDown function. Here's the function for you guys to see (for up and down):
void MoveAxisUp(int Direction, int Step) {
digitalWrite(Direction, HIGH); // Xdir = X Direction
digitalWrite(Step, HIGH); // Setting Steps
delayMicroseconds(200); // Delay between Steps
digitalWrite(Step, LOW);
delayMicroseconds(200); // The nut will go up on its own axis
}
void MoveAxisDown(int Direction, int Step) {
digitalWrite(Direction, LOW); // Xdir = X Direction
digitalWrite(Step, HIGH); // Setting Steps
delayMicroseconds(200); // Delay between Steps
digitalWrite(Step, LOW);
delayMicroseconds(200); // The nut will go DOWN on its own axis
}
Now, here's the part of the code where the stepper go very slow:
void menuItem5() { // Function executes when you select the 5th item from main menu
int activeButton = 0;
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Press Up To");
lcd.setCursor(0, 1);
lcd.print("Start Homing");
while (activeButton == 0) {
int button;
float savedLT;
readKey = analogRead(0);
if (readKey < 790) {
delay(100);
readKey = analogRead(0);
}
button = evaluateButton(readKey);
switch (button) {
case 2:
valXUp = digitalRead(LimitSwitchXUp); // Reading sensor values
valXDown = digitalRead(LimitSwitchXDown);
valZ1Up = digitalRead(LimitSwitchZ1Up);
valZ1Down = digitalRead(LimitSwitchZ1Down);
//Serial.println("ValUP: ");
valZ2Up = digitalRead(LimitSwitchZ2Up);
//Serial.println(valZ2Up);
valZ2Down = digitalRead(LimitSwitchZ2Down);
//Serial.println(valZ2Down);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Moving Z2");
delay(1000);
flagZ2 = 0;
while (flagZ2 == 0) {
valZ2Down = digitalRead(LimitSwitchZ2Down);
Serial.println(valZ2Down);
Serial.print("Z2 - Down");
if (valZ2Down == LOW) {
valZ2Down = digitalRead(LimitSwitchZ2Down);
if (valZ2Down == LOW) {
valZ2Down = digitalRead(LimitSwitchZ2Down);
if (valZ2Down == LOW) {
flagZ2 = 1;
}
}
}
MoveAxisUp (Z2dir, Z2step);
}
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Moving Z1");
delay(1000);
flagZ1 = 0;
while (flagZ1 == 0) {
valZ1Down = digitalRead(LimitSwitchZ1Down);
Serial.println(valZ1Down);
Serial.print("Z1 - Down");
if (valZ1Down == LOW) {
valZ1Down = digitalRead(LimitSwitchZ1Down);
if (valZ1Down == LOW) {
valZ1Down = digitalRead(LimitSwitchZ1Down);
if (valZ1Down == LOW) {
valZ1Down = digitalRead(LimitSwitchZ1Down);
flagZ1 = 1;
}
}
}
MoveAxisUp (Z1dir, Z1step);
}
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Moving X");
delay(1000);
flagX = 0;
while (flagX == 0) {
valXUp = digitalRead(LimitSwitchXUp);
Serial.println(valXUp);
Serial.print("X - Up");
if (valXUp == LOW) {
valXUp = digitalRead(LimitSwitchXUp);
if (valXUp == LOW) {
valXUp = digitalRead(LimitSwitchXUp);
if (valXUp == LOW) {
flagX = 1;
}
}
}
MoveAxisUp (Xdir, Xstep);
}
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Moving Z2");
delay(1000);
flagZ22 = 0;
while (flagZ22 == 0) {
valZ2Up = digitalRead(LimitSwitchZ2Up);
Serial.print("Z2 - Up");
Serial.println(valZ2Up);
if (valZ2Up == LOW) {
valZ2Up = digitalRead(LimitSwitchZ2Up);
Serial.print("Z2 - Up");
Serial.println("Ciclo 1");
if (valZ2Up == LOW) {
valZ2Up = digitalRead(LimitSwitchZ2Up);
Serial.println("Ciclo 2");
delayMicroseconds(1000);
if (valZ2Up == LOW) {
Serial.println("Ciclo 3");
valZ2Up = digitalRead(LimitSwitchZ2Up);
if (valZ2Up == LOW ) {
Serial.println("Ciclo 4");
flagZ22 = 1;
}
}
}
}
MoveAxisDown (Z2dir, Z2step);
}
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Homing Completed");
break;
case 4: // This case will execute if the "back" button is pressed
button = 0;
activeButton = 1;
break;
}
}
}
In this part, I'm homing the system. the "val something" variable is a limit switch that I use to prevent the axis from coliding. I need to check if it's low 3 times because of the noise.
Here is the full code if you need it: EDIT: I can't add the full code because the forum only allows 9000 characters.
Any comments?
Thank you Experts,
Josdc
